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HP 8591C User Manual

Cable tv analyzer cable tv measurements
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Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
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Hewlett-Packard to Agilent Technologies Transition
This documentation supports a product that previously shipped under the Hewlett-
Packard company brand name. The brand name has now been changed to Agilent
Technologies. The two products are functionally identical, only our name has changed. The
document still includes references to Hewlett-Packard products, some of which have been
transitioned to Agilent Technologies.
Printed in USA March 2000

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  • Page 1 ® Advanced Test Equipment Rentals www.atecorp.com 800-404-ATEC (2832) Notice Hewlett-Packard to Agilent Technologies Transition This documentation supports a product that previously shipped under the Hewlett- Packard company brand name. The brand name has now been changed to Agilent Technologies. The two products are functionally identical, only our name has changed. The document still includes references to Hewlett-Packard products, some of which have been transitioned to Agilent Technologies.
  • Page 3 HP part number: 08591-90176 Supersedes: 08591-90124 Printed in USA, October 1996 Notice. The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose.
  • Page 4 Important Please carefully read this License Agreement before opening the media envelope or operating the equipment. Rights in the software are offered only on the condition that the Customer agrees to all terms and conditions of the License Agreement. Opening the media envelope or operating the equipment indicates your acceptance of these terms and conditions.
  • Page 5 In return for payment of the applicable fee, Hewlett-Packard grants the Customer a license in the software, until terminated, subject to the following: Use. Customer may use the software on one analyzer instrument Customer may not reverse assemble or decompile the software. Copies and Adaptations.
  • Page 6 Updates and Upgrades. Customer agrees that the software does not include future updates and upgrades which may be available for HP under a separate support agreement. Export. Customer agrees not to export or re-export the software or any copy or adaptation in violation of the U.S.
  • Page 7 Software. Hewlett-Packard warrants for a period of 1 year from the date of purchase that the software product will execute its programming instructions when properly installed on the analyzer instrument indicated on this package. Hewlett-Packard does not warrant that the operation of the software will be uninterrupted or error free.
  • Page 8 Exclusive Remedies. The remedies provided above are Customer’s sole and exclusive remedies. In no event shall Hewlett-Packard be liable for any direct, indirect, special, incidental, or consequential damages (including lost profit) whether based on warranty, contract, tort, or any other legal theory. Warranty Service.
  • Page 9 The following safety symbols are used throughout this manual. F’amiliarize yourself with each of the symbols and its meaning before operating this instrument. The caution sign denotes a hazard. It calls attention to a procedure which, CAUTION if not correctly performed or adhered to, could result in damage to or destruction of the instrument.
  • Page 10 Before the analyzer is switched on, make sure it has been properly WARNING grounded through the protective conductor of the ac power cable to a socket outlet provided with protective earth contact. Any interruption of the protective (grounding) conductor, inside or outside the instrument, or disconnection of the protective earth terminal can result in personal injury.
  • Page 11 AM measurements with FFT menu Gate driver (Option 105 or 107 required) 2. The HP 85721A with supported analyzer is a cable TV analyzer. With the Option 107 added, the analyzer can also perform three video measurements: differential gain, differential phase, and chrominance-to-luminance delay inequality.
  • Page 12 Measurement results can be stored to a RAM card, sent to the screen for viewing, or dumped to a printer. 3. The HP 85721A with supported analyzer is a TV receiver (Option 107 required). You can listen to the sound and see the picture simultaneously.
  • Page 13 Chapter 7 contains menu maps and descriptions of softkey functions in the Setup menu. Chapter 8 provides descriptions of all tests. Chapter 9’contains specifications and characteristics of the HP 85721A Cable TV Measurements and System Monitor Personality with supported analyzer. In addition, channel identiEcation plans and a channel survey...
  • Page 14 This guide uses the following conventions: A boxed, uppercase name in this typeface Front-Panel Key represents a key physically located on the instrument. A boxed word written in this typeface indicates a “softkey,” a key whose label is determined by the instrument’s firmware. A boxed word written in this typeface with the words ON and OFF can turn a function on or off.
  • Page 15 Firmware Requirements Your analyzer must have firmware that was released on September 23, 1993 or later to use the HP Turn on the analyzer. Read the firmware date that is displayed (the firmware date is displayed on the analyzer’s display when the analyzer is first turned on).

  • Page 16: Table Of Contents

    ..Setup for Cable TV Measurements Step 1. Load the HP 85721A personality into analyzer memory ....
  • Page 17 3-20 Making Timed System Measurements ..3-22 Creating a Test Plan 3-23 Step 1. Select an inbiiidu&l ..1 1 1 ..3-25 Step 2.
  • Page 18 If a test fails in SYSTEM MEAS mode ..4-12 If files are missing from a RAM card ..4-12 If a “-” appears in the data fields .
  • Page 19 6-16 DUMP TO RAM CARD Description ... 6-17 DUMP TO SCREEN Description ... . . 6-18 ENTER BY CHANNEL Description ... 6-18 ENTER BY RANGE Description .
  • Page 20 ... . 6-34 TIME INTERVAL Description 6-35 TODAY’ S DATE Description ....TODAY’ S TIMEDATE Description ... 6-35 VIEW CH SEL Description .
  • Page 21 System Beats Description ... . . T Description ....7-19 TOTL PWR 0 INPUT Description ... 7-20 TV RECEIVER Description .
  • Page 22 Glossary Index Contents-7...
  • Page 23 2-10 ..2-10 2-5. Connections for HP 8591C analyzer with Option 107 2-6. Carrier Level Measurement ....2-13 ..

  • Page 24: Channel Tuning Menu

    Analyzer Input ConEguration Menu ... . Connecting the Cable to the Input Connector ..Connections for HP 8591C analyzer with Option 107 (RF Measurements) .
  • Page 25 Contents 6-14 ....6-5. An Example Printout ....7-l.
  • Page 26 Personality Channel Measurements 4-l. Ranges for the Cable TV System Monitor Functions . . 6-l. Cataloging Memory Card 6-2. Information Contained Printout 6-12 6-3. Information Contained Printout 6-15 8-l. Auto Resolution Bandwidth (RBW) and Video Bandwidth (VBW) selection 8-31 8-2. Comparison CLDI Measurement...
  • Page 27 Contents...

  • Page 29: What You'll Find In This Chapter

    This chapter provides step-by-step procedures for setting up an analyzer to perform cable TV measurements using the HP 85721A Cable TV Measurements and System Monitor Personality. This chapter contains the following sections: supported spectrum analyzer requirements setup for cable TV measurements...

  • Page 30: Supported Spectrum Analyzer Requirements

    Option 301 TV Sync TriggerlFAOC (or Options 101 and 1021 Option 107 TV receiver required for video and gated measurements N O T E Options 004, 043, and 301 are standard with the HP 8591C analyzer. Also, the HP 85721A personality is pre-loaded into the HP 85911: analyzer.

  • Page 31: Setup For Cable Tv Measurements

    Load the HP 85721A personality into analyzer memory (if necessary). Perform the self-calibration routines. Connect cable for non-interfering measurements. Start channel or system mode of operation. N O T E The HP 85721A personality is pre-loaded into the HP 8591C analyzer.

  • Page 32: Step 1. Load The Hp 85721A Personality Into Analyzer Memory

    Getting Started Setup for Cable TV Measurements Plug the analyzer into an ac power supply. Press are displayed, skip to “Step 2. Perform the CABLE TV ANALYZER TV RECEIVER self-calibration routines.’ locate the arrow printed on the card label. l - 5...
  • Page 34 Getting Started Setup for Cable TV Measurements Press the following softkeys to load the HP 85721A personality: , two files are displayed, Catalog Card Using the step keys, make sure the file is highlighted, the press When loading is LOAD FILE.

  • Page 35: Step 2. Perform The Self-Calibration Routines

    Getting Started Setup for Cable TV Measurements Allow the analyzer to warm up for 30 minutes before performing the following steps. For the analyzer to meat its specifications and characteristics, the self-calibration routines should be performed periodically or whenever the ambient temperature changes. Sea the operating manual for the analyzer to determine how often the self-calibration routines should be oarformed.
  • Page 36 Getting Started Setup for Cable TV Measurements or, if the analyzer’s amplitude calibration routine has bean performed recently, press instead of The analyzer’s frequency and amplitude self-calibration routine take FREQ CAL FREQ & AMPTD about 1.5 or 9 minutes to complete, respectively. If an error massage is displayed, refer to the Installation and Verification Manual for the analyzer.

  • Page 37: Step 3. Install A Printer

    Getting Started Setup for Cable TV Measurements Steps 1 and 2 of this procedure apply to an analyzer with an HP-IS interface [Option OZl] only. Skip to steps 3 and 4 if your analyzer has an K-232 interface (Option 043).
  • Page 38 Getting Started Setup for Cable TV Measurements Steps 3 and 4 apply to an analyzer with an R-232 interface only. Refer to the HP 8590 E-Series Spectrum AnaQzer Programmer’s Guide, “Appendix C,’ for more information about using the K-232 interface.

  • Page 39: Step 4. Connect Cables For Non-Interfering Measurements

    Getting Started Setup for Cable TV Measurements Perform this procedure if you have Option 107 installed in your analyzer. [Option 107 is required for video and non-interfering measurements, and TV receiver mode of operation.) Otherwise, proceed to the next step. Attach one right-angle BNC adapter to the TV TRIG OUTPUT ITTLJ connector, and another right-angle BNC adapter to the GATE TRIGGER INPUT ITTLI.
  • Page 40 Setup for Cable TV Measurements N O T E The above procedure is not required when the HP 8591C ‘analyzer is purchased with Option 107 because the cable is pre-installed. When performing non-interfering measurements, the external coupler must also be connected. See Chapter 2, “Step 2.

  • Page 41: Step 5. Start Channel Or System Mode Of Operation

    The softkeys accessed by pressing allow you to customize the HP 857214, personality to your equipment and system. Setup Chapters 2 and 3 contain information on how to softkeys.

  • Page 42: Deleting The Hp 85721A Personality From The Analyzer

    The steps outlined below remove the HP 85721A personality tests and functions added to the analyzer by the ROM measurements card: 1. Press (PRESETI). Wait for the preset routine to finish. , ERASE DLP MEM Press @ZFi]. 1-15...
  • Page 43 Getting Started...

  • Page 45: What You'll Find In This Chapter

    This chapter describes how to make cable TV measurements using the channel measurements mode of operation (CHANNEL MEAS ). This chapter contains information on making channel measurements. The tests are listed below along with the softkey that activates them. Table 2-1. Channel Measurements Carrier Level and Frequency CARRIER LVt&FRQ Carrier to Noise...

  • Page 46: Making Channel Measurements

    This section explains the steps that are necessary to make channel measurements. The steps are as follows: 1. Configure the test system. 2. Connect the signal to the analyzer. 3. Make the measurements. 4. Access the spectrum analyzer mode. 5. Access the TV receiver mode (optional).

  • Page 47: Step 1. Configure The Test System

    Channel Measurements Making Channel Measurements The Setup menu is used to set up channel tuning, a user defined channel, an external preamplifier, and an external matching pad (50 !? analyzers only). In addition, gated (non-interfering) measurements can be configured (Option 107 required).
  • Page 48 75 Q matching pad/de block to compensate for the impedance mismatch between a 75 fl impedance system and the spectrum analyzer’s 50 61 input impedance. If you use an HP 11981A external pad, the external pad causes approximately 5.8 dB of amplitude loss. The external pad function (EXT PAD YES MO ) can be used to compensate for this amplitude loss.
  • Page 49 Press EXT AMP GAIN then enter the gain value of the external Press EXT AMP NZ FIG then enter the noise Egure value of the external ampliEer. The default value is 7 dB for the HP 85905A Press Prev Menu to return to the Setup menu.
  • Page 50 Channel Measurements Making Channel Measurements If GATING YES NO is set to YES, upon executing the carrier-to-noise or CSO measurements, the analyzer automatically searches for a quiet line (a line with no video modulation) starting at the default line. N O T E The default quiet line number for carrier-to-noise and CSO is 12, and both fields.
  • Page 51 Channel Measurements Making Channel Measurements OEC 86, 1993 REF 37.5 dBmV AT 10 dB Channel PEAK Tuning AA SB CORR Menu SPAN 6.888 RES BW 30 kHz Figure 2.3. Tests Configuration Menu 8. Connect the cable TV signal as shown in “Step 2. Connect the signal to the analyzer.

  • Page 52: Step 2. Connect The Signal To The Analyzer

    For all tests provided by the HP 85721A personality, the analyzer automatically selects the attenuator setting to meet the above requirements.

  • Page 53: Connecting The Cable To The Input Connector

    Making Channel Measurements N O T E The TV IN connector on the HP 8591C analyzer with Option 107 is located on the front panel. However, on HP 8590 E-Series spectrum analyzers with Option 107, the TV IN connector is located on the rear panel.

  • Page 54: Step 3. Make The Measurements

    Channel Measurements Making Channel Measurements Most measurements update the result at the end of a sweep or at the end of multiple sweeps. Refer to each measurement type. Hints 1. If you accidentally use the wrong key sequence, reenter the channel. If CHANNEL SELECT is the active function, enter the channel number, then press @Et!@.
  • Page 55 Channel Measurements Making Channel Measurements Carrier level and 1. Select a channel, then press CARRIER LVL&FRQ The peak visual carrier frequency test level and visual-to-aural carrier difference appear on the screen. See Figure 2-6. visual-to-aural carrier frequency difference appear on the screen. See Figure 2-7.

  • Page 56: Carrier Frequency Measurement (100 Hz Resolution)

    Channel Measurements Making Channel Measurements CHANNEL 55.275 34.4 dBnV 34.59 dBmV NEXT PEAK . ..j ... YES !Q ON OFF CENTER 57.888 SPAN 6.888 MHZ WRES BW See kHz Figure 2-6. Carrier level Measurement CHRNNEL CNTR 55.2688...
  • Page 57 Channel Measurements Making Channel Measurements DEC 446, 1993 CHANNEL CNTR 59.76008 AT 10 dB 1 9 . 0 1 CHANNEL ..,,, ,:.,.,,. ..:..: YES No FREQ CENTER SPAN 6.888 MHz WRES BW 300 kHz Figure 2-8.
  • Page 58 Channel Measurements Making Channel Measuremants Carrier-to-noise test 1. Select a channel, then press Main 1 of 3 CARRIER/NOISE 2. Perform the following steps for analyzers both without and with Option 107 (when GATING is set to NO): a. The marker defaults to the minimum system noise near the lower channel boundary.
  • Page 59 Channel Measurements Making Channel Measurements JAN 25, 1995 CHANNEL 57.375 -8.4 -44.87 GATE ON m II : AVERAGE MENU START 53.745 STOP 59.745 WVBW 186 Hz Figure 2.10. See MORE INFO Screen 3. Perform the following steps if your analyzer has Option 107 installed and you want to perform a gated (non-interfering) measurement (modulation turned on).
  • Page 60 Channel Measurements Making Channel Measurements N O T E Non-interfering carrier-to-noise cannot be measured without a quiet line. See Figure 2-11. Figure 2-11. Example of a Quiet line results on the screen. See Figure 2-12. e. The default center marker setting is +2.25 MHz above the visual carrier.
  • Page 61 Channel Measurements Making Channel Measurements N O T E Spurious signals in the integration range can negatively affect the result because the power in the spurious signal is added into the noise level. It is best to find the reason for the spurious signal and eliminate it.

  • Page 62: Carrier-To-Noise, More Information

    Channel Measurements Making Channel Measurements 4. If you want to store the results to a RAM card, insert a formatted RAM card into the analyzer’s card-insertion slot, press (SAVE) display-Xard , then press [m] [NIODEI) to return to channel measurement mode. Refer to Chapter 3 for the procedure on formatting a RAM card.
  • Page 63 Channel Measurements Making Channel Measurements Note that when an external preamplifier is used and EXT AMP YES NO is activated (YES is underlined), the noise contribution of the preampliEer is also calculated and corrected for. The values for external preamplifier gain and noise figure are used for this calculation.
  • Page 64 Channel Measurements Making Channel Measurements Optimizing the Dynamic Range Limiting the number of carriers input to the analyzer allows the measurement routine to select a lower attenuator value. Hence a lower noise floor. This can be done with individual channel filters, a high pass filter, a low pass filter or an adjustable bandpass filter.

  • Page 65: Fcc Composite Test Signal

    Channel Measurements Making Channel Measurements Main 1. Select a channel, then press 1 of 3 Main 2 of 3 CLDI . inequality test N O T E Option 107 is required for the Chromalluma delay inequality test. 2. The line number of a test signal is found automatically (if a test signal exists).

  • Page 66: Ntc 7 Composite Test Signal

    Channel Measurements Making Channel Measurements S E L E C T L I N E AVERAGES A U T O S I G SEARCH S C T C CORR C O N T I N U E C E N T E R 59.000 MHz S P A N 0 H Z Figure 2-15.

  • Page 67: Chrominance To Luminance, More Information

    Channel Measurements Making Channel Measurements NTC 7 CUMPOSIT to select the NTC 7 composite test signal. To assist in test signal identification a small schematic diagram of the test signal is displayed at the top of the screen. The result of the measurement is displayed on the analyzer display. An offset of 170 ns is added to the result so that it will agree with tests done using a demodulator with 170 ns of delay.
  • Page 68 Channel Measurements Making Channel Measurements 8. If you want to store the results to a RAM card, insert a formatted RAM card into the analyzer’s card-insertion slot, press ISAVE) measurement mode. Refer to Chapter 3 for the procedure on formatting a RAM card.
  • Page 69 Channel Measurements Making Channel Measurements Composite Second 1. Select a channel, then press Main 1 of 3 CSO/CTB Order/Composite Triple 2. Perform the following steps for analyzers both without and with Option Beat Test 107 (when GATING is set to NO): a.
  • Page 70 Channel Measurements Making Channel Measurements Non-interfering carrier-to-beats cannot be measured wlthout a quiet line. d. Press CONTINUE to complete the measurement and display the test result on the screen. e. The default marker position is at the + 1.25 MHz CSO beat. The marker can be moved using the knob or the NEXT BEATS key.
  • Page 71 Channel Measurements Making Channel Measurements Remove the carrier, or press CTB STEP UP or CTB STEP DN to measure CTB above or below the carrier (if an open space exists). Each time CTR STEP UP is pressed, the marker is automatically positioned at the next CTB above the carrier (+6 MHz increments).

  • Page 72: Cso Measurement

    Channel Measurements Making Channel Measurements 23, 1993 54.888 -33.83 Figure 2.17. CSO Measurement 23, 1993 CHANNEL 49.268 ENTER 50.768 6.98 Figure 2-l 8. CTB Measurement 2 - 2 9...

  • Page 73: Cross Modulation Measurement

    Channel Measurements Making Channel Measurements Cross modulation test 1. Select a channel, turn off modulation, then press Main 1 of 3 CROSSMOD. 2. If you want to store the results to a RAM card, insert a formatted RAM card into the analyzer’s card-insertion slot, press m display->card , then press (MODE) (MODEI) to return to channel measurement mode.
  • Page 74 Channel Measurements Making Channel Measurements Depth of video 1. Select a channel, then press Main 1 of 3 DEPTH MOD . modulation test 2. The result is displayed at the bottom of the screen. This result is updated every 10 analyzer sweeps (approximately every 3 seconds) and continues until STOP MEAS or MAIN MENU is pressed.

  • Page 75: Depth Of Video Modulation Measurement

    3. For spectrum analyzers with TV Sync (Option 102) and Fast Time-Domain Sweeps (Option lOl), the test can also be performed on an individual TV line: a. Press TV LINE X . Line 17 appears as default line number. Options 102 and 101 are standard with the HP 8591C analyzer. 2-32...

  • Page 76: Tv Line Number

    Channel Measurements Making Channel Measurements 1 4 . 4 23, 1 9 9 3 C H A N N E L REF 8 3 . 6 6 A T 1 0 d@ 9 . 6 4 2 1 SMPL W A SB S C T C CORR I CENTER...

  • Page 77: Depth Of Video Modulation, More Information

    Channel Measurements Making Channel Measurements N O T E The displayed video is inverted from how it would appear on a waveform analyzer (that is, sync is displayed at the top in this test and would be displayed at the bottom with a waveform analyzer). e.
  • Page 78 Channel Measurements Making Channel Measurements 5. Return to the full-field display by pressing Prev Menu At this point, the analog display mode can be activated by pressing ANALOG+ ON OFF in the [Z’YZ] menu. The sweep time can then be adjusted and the knob used to control the dot density to obtain the desired display.
  • Page 79 Channel Measurements Making Channel Measurements Hints 1. For best results, the carrier-to-noise ratio of the system should be 40 dHc or greater lin a 4 MHz noise bandwidth). 2. For this measurement to work correctly, the Vertical Interval Test Signals NITSI must include a white signal level.

  • Page 80: Fcc Composite Test Signal

    Channel Measurements Making Channel Measurements Differential 1. Select a channel, then press Main 1 of 3 Main 2 of 3 gain/differential phase DIF GAIN DIF PHAZ. test NOTE Option 107 is required for the differential gain/differential phase test. 2. The test signal is found automatically (if a test signal exists). The search starts at the default line number (line 18).

  • Page 81: Ntc 7 Composite Test Signal

    Channel Measurements Making Channel Measurements 2 3 2 3 N O ” 2 3 . 5 mV SELECT L I N E F I E L D O D D EE A U T O S I G SEARCH W A SB S C T C CORR T e s t...
  • Page 82 Channel Measurements Making Channel Measurements Improving Accuracy Use the External 75 Ohm Preamp (85905A) for the Oifferential Gain and Oifferential Phase tests when measuring peak visual carrier levels equal to or less than +lO dElmV. This improves the repeatability of the measurement.

  • Page 83: Differential Gain/Differential Phase Measurement

    Channel Measurements Making Channel Measurements FCC or NTC deEnitions. The FCC definition of differential phase (and that of the NCTA) measures only the largest phase deviation from the phase of the reference packet. The NTC deEnition measures the peak-to-peak deviation of phase from that of the reference packet. The default is FCC (FCC is underlined) and changes are permanent until changed by pressing DP TEST HTC/FCC again.

  • Page 84: Differential Gain/Differential Phase, More Information

    Channel Measurements Making Channel Measurements 8. If you want to store the results to a RAM card, insert a formatted RAM card into the analyzer’s card-insertion slot, press IsAvE_) measurement mode. Refer Chapter 3 for the procedure on formatting a RAM card.

  • Page 85: Tuned Digital Channel Display

    Channel Measurements Making Channel Measurements Digital Channel Power The digital channel power measurement computes the total power within Measurement the speciEed bandwidth (between markers) of the selected channel. Before the digital channel power measurement can be accessed the channel measurement mode must be active with a channel selected. Press the CHANNEL MEAS key in the main menu to select the channel measurement mode.

  • Page 86: Method #2 - Tune By Start And Stop Frequencies

    Channel Measurements Making Channel Measurements Method #2 - Tune by start 1. Press the front panel key. FREQUENCY and stop frequencies Use the front panel key, REF LWL to set the reference level so AMPLITUDE the peak of the signal falls approximately 10 to 20 dB below the top of the display.

  • Page 87: Results Of Digital Channel Power Test

    Channel Measurements Making Channel Measurements N O T E If the left marker is placed to the right of the right marker, the message “MKR 2 > MKR 1 ?” is displayed. The measurement will not be performed until the markers are repositioned properly Use the AVERAGE key to turn averaging on or off.
  • Page 88 Channel Measurements Making Channel Measurements N O T E The analyzer has been configured for maximum accuracy Adjustment of VBW or RBW may degrade the measurement performance. Press MAIN MENU to exit the test. 2-45...
  • Page 89 FM deviation test N O T E Option 102 or 301 is required to perform the FM deviation measurement using HP 8590 E-Series spectrum analyzers. This option is standard with the HP 8591C analyzer. 1. To use the FM deviation function, press FM DEV . The markers are placed on the largest peak-to-peak extreme found during the measurement time.

  • Page 90: Fm Deviation

    Channel Measurements Making Channel Measurements 1 9 9 3 MKR A - 7 5 0 . 0 0 REF - 1 . 5 A T 1 0 dB - 6 0 . 0 5 0 C Y C L E S / MSMT M A I N MENU...
  • Page 91 Channel Measurements Making Channel Measurements Hum test 1. Select a channel or tune directly to the carrier to be measured. Make sure that the desired carrier is the highest on screen by adjusting the center frequency and/or span as needed. Turn off modulation (optional), then press Main 1 of 3 , HUM.

  • Page 92: Hum Measurement

    Channel Measurements Making Channel Measurements 1 4 : 5 7 : 0 0 N O V 2 3 , 1 9 9 3 M K R A - 2 9 . 8 5 0 msec AT 10 dB MORE CORR I N F O M A I N MENU...
  • Page 93 Channel Measurements Making Channel Measurements Hints 1. For best results, the channel carrier-to-noise ratio should be 40 dl or greater lin a 4 MHz noise bandwidth). 2. The hum test requires a carrier wave or NTSC signal. It cannot give meaningful results when a channel uses sync suppression scrambling (unless the measurement is made at the subscriber terminal output of a descrambler).
  • Page 94 Channel Measurements Making Channel Measurements In-channel frequency 1. Select a channel, then press Main 1 of 3 Main 2 of 3 response test IN-CHAN FRCj RSP . line sweep as a test signal. See Figure 8-16. This setup puts Trace A into max hold with 2 markers and with Trace B active.
  • Page 95 Channel Measurements Making Channel Measurements N O T E Test signals for in-channel frequency response measurements must be found and selected manually Multiburst and NTC 7 combination frequency packet pulse widths are critical to measurement results. b. To change the line number, either enter the new number and press respectively, the current line number by one.

  • Page 96: Ghost Cancellation Reference (Gcr)

    Channel Measurements Making Channel Measurements 59. 36 NO” 23, 1993 4 (STDI Figure 2.32. Ghost Cancellation Reference (GCR) N O T E The function that views test signals is intended for signal identification only Significant signal distortion and high frequency roll-off does not affect the actual measurement. 2 - 5 3...

  • Page 97: Fcc Multi-Burst Test Signal

    Channel Measurements Making Channel Measurements Figure 2-33. FCC Multi-Burst Test Signal 15 00. 37 ND” 2 3 . 1 9 9 3 Figure 2-34. NTC-7 Combination Multi-Burst Test Signal 2 - 5 4...
  • Page 98 Channel Measurements Making Channel Measurements Figure 2-35. Sine XIX Test Signal Figure 2-36. Results with GCR or line Sweep Test Signal 2 - 5 5...
  • Page 99 Channel Measurements Making Channel Measurements Figure 2-37. Results with FCC Multi-Burst Test Signal Figure 2.38. More Information (Multi-Burst) 2 - 5 6...
  • Page 100 Channel Measurements Making Channel Measurements System frequency 1. To perform a cable TV overall system frequency response, press the response test following analyzer keys: Main SYSTEM FRQ RESP press Cm]. press [ENTER). N O T E The start and stop frequencies for the measurement should be the same as the reference trace for meaningful results.
  • Page 101 Channel Measurements Making Channel Measurements 15: 34 1993 -289.4 40.5 Figure 2-39. System Frequency Response Measurement normally needed but is useful to fine adjust the measurement data relative to the reference data to minimize ripple. relative to the first marker position. 12.
  • Page 102 Channel Measurements Making Channel Measurements Procedure for System The following is an outline for measuring system flatness using two points in Flatness Measurement the system. For example, a reference trace could be taken at the headend, then compared to a flatness measurement made somewhere out in the system.
  • Page 103 Channel Measurements Making Channel Measurements View ingress test 1. Select a channel, then press VIEW INGRESS A marker is placed on the peak of the carrier, and the delta marker is activated. 2. After the displayed modulation and noise are reduced with minimum hold, use the knob to position the delta marker on a signal appearing above the noise.
  • Page 104 Channel Measurements Making Channel Measurements exit the test. JAN 12. 1993 R E F 2 2 . 7 -37.73 M A I N MENU C E N T E R 6 7 . 2 3 6 7 5 NHz S P A N 5B.BB kHz R E S Figure 2-41.

  • Page 105: Step 4. Access The Spectrum Analyzer Mode

    Channel Measurements Making Channel Measurements Step 4. Access the spectrum analyzer mode Press the desired spectrum analyzer front panel hardkey function Press ( PRESET). To use the spectrum analyzer operating mode while in the cable TV analyzer operating mode, select a front-panel hard key (for examole needed.

  • Page 106: Step 5. Access The Tv Receiver Mode (Optional)

    Channel Measurements Making Channel Measurements Step 5. Access the TV receiver mode (optional) Press @iZK), TV RECEIVER, Press CHANNEL SELECT , enter the channel you want to view with the numeric keypad, then press (ENTER). You can also select channels by using the large knob or arrow keys on the front panel.
  • Page 107 Channel Measurements Making Channel Measurements...

  • Page 109: What You'll Find In This Chapter

    What You’ll This chapter describes how to make cable TV measurements using the system Find in This measurements mode of operation (SYSTEM MEAS ). This chapter contains the following sections: Chapter making system measurements making timed system measurements editing the current test plan clearing the current test plan recalling a test plan from a RAM card recalling test data from the RAM card...

  • Page 110: Making System Measurements

    Making System Measurements The system measurement mode of operation allows you to create and save test plans that contain the following setup information: channel numbers scrambling status If Option 107 is installed: vertical interval test signal (VITS) VITS line number Eeld-odd, even, or both N O T E Appropriate vertical interval test signals WITS1 must be present for meaningful results in Option 107...

  • Page 111: Step 1. Configure The Test System

    System Measurements Making System Measurements Step 1. Configure the test system The Setup menu is used to set up channel tuning, a user deEned channel, an external preampliEer, and an external matching pad (50 61 analyzers only). The information is stored in nonvolatile analyzer memory. This means that the analyzer retains the information, even when power is turned off, until you access the Setup menu again and change it.
  • Page 112 75 61 matching pad/de block to compensate for the impedance mismatch between a 75 62 impedance system and the spectrum analyzer’s 50 hl input impedance. If you use an HP 11981A external pad, the external pad causes approximately 5.8 dB of amplitude loss. The external pad function (EXT PAD YES NO ) can be used to compensate for this amplitude loss.
  • Page 113 Press Analyzer Input EXT AMP YES NO to underline YES. Press EXT AMP GAIN then enter the gain value of the external amplifier. The default value is 20 dB for the HP 85905A preampliEer. Press EXT AMP NZ FIG then enter the noise figure value of the external amplifier.
  • Page 114 System Measurements Making System Measurements 6. If the system CSOKTB test is desired, specify a channel to be tested. Press System Beats , SYS BTS TST CBNL , then enter the channel number. The default is channel 4. The default measurement frequency for CTB is 6 MHz above the visual carrier.

  • Page 115: Step 2. Connect The Signal To The Analyzer

    For all tests provided by the HP 85721A personality, the analyzer automatically selects the attenuator setting to meet the above requirements.
  • Page 116 Making System Measurements N O T E The TV IN connector on the HP 8591C analyzer with Option 107 is located on the front panel. However, on HP 8590 E-Series spectrum analyzers with Option 107, the TV IN connector is located on the rear panel.

  • Page 117: Step 3. Enter The Location Code

    System Measurements Making System Measurements Step 3. Enter the location code 3. Press the data keys to enter the location code. The location code can be up to seven digits long. If you make a mistake, you can use the back space key to correct the location code.

  • Page 118: Step 4. Enter The Temperature

    System Measurements Making System Measurements Step 4. Enter the temperature 2. Press the data keys to enter the temperature. If you make a mistake, you can use the back space key to correct the location code. The back space key (cm]) is onthe lower right corner of the analyzer’s front panel, next to the (-1 key.

  • Page 119: Step 5. Recall A Test Plan

    System Measurements Making System Measurements Step 5. Recall a test plan memory, or RECALL FRM CARD to recall a test plan from a RAM card. N O T E If you have not created a test plan, refer to “Creating a Test Plan” later in this chapter. 3.
  • Page 120 System Measurements Making System Measurements 1 9 9 3 R E C A L L F R M I N T R E C A L L FRll INT i n t e r n a l m e m o r y R E C R L L from R E C A L L F R N CR0...

  • Page 121: Step 6. Make The Measurements Now

    System Measurements Making System Measurements Step 6. Make the measurements now This procedure describes how to initiate immediate testing. For information on making measurements at a later time, refer to “Making Timed System Measurements” later in this chapter. is selected, system CTBKSO will be measured using the channel specified using the SYS BTS TST CHNL softkey located in the Setup menu.
  • Page 122 System Measurements Making System Measurements information about connecting the printer to the analyzer, see “Step 3. Install a printer,” located in Chapter 1. c. If you want the data to be saved on a RAM card, insert a RAM card in the card reader, ensure that the RAM card has been formatted and the write-protect switch is set so the RAM card is not write protected, then press DUMP TO RAM CARD...
  • Page 123 System Measurements Making System Measurements 23, 1993 DATA FILE: PAGE NEXT PAGE PREV PAGE T I M E O F MEhSUREtlENTS: 15:55 L O C A T I O N C O D E = GOT0 PAGE E N T E R E D TEMPERbTURE S E R I A L N U M B E R = P R I N T REPORT...
  • Page 124 System Measurements Making System Measurements 1 9 9 3 FILE: NEXT PREU PAGE PAGE H U M % ......

  • Page 125: Step 7. Access The Spectrum Analyzer Mode

    System Measurements Making System Measurements Step 7. Access the spectrum analyzer mode 2. Press Ij%i%F). If you want to use the spectrum analyzer functions after using the cable TV measurement system, you need to access the spectrum analyzer mode. When the analyzer is in the spectrum analyzer mode, SYSTEM is no longer displayed in the upper right corner of the analyzer display.

  • Page 126: Step 8. Access The Tv Receiver Mode (Optional)

    System Measurements Making System Measurements Step 8. Access the TV receiver mode (optional) 2. Press (-J followed by TV RECEIVER numeric keypad, then press [ENTER). You can also select channels by using the large front-panel knob or front-panel arrow keys. 5.

  • Page 127: Making Timed System Measurements

    Making Timed System Measurements This procedure describes how to make tests at a later time. Tests at a later time can also be repeated. N O T E Ensure that the analyzer’s clock is set to the correct time and date. 1.
  • Page 128 System Measurements Making Timed System Measurements time measurements using the data keys, then press CENTER). Enter the interval in an hour, minute, 24-hour format. information about connecting the printer to the analyzer, see “Step 3. Install a printer” in Chapter 1. 11.

  • Page 129: Creating A Test Plan

    Creating a Test Plan A test plan consists of the channels that you want to measure and the tests you want to make on those channels. This section contains the procedure used to create a test plan. The procedure includes the following steps: 1.
  • Page 130 System Measurements Creating a Test Plan Step 1. Select an individual channel CABLE TV ANALYZER , SYSTEM MEAS , More 1 of 2 , Create TstPlan . 3. Use the data keys to enter the channel nwnber, then press Cm]. N O T E Valid channel numbers are 0 through 999.
  • Page 131 System Measurements Creating a Test Plan If you selected a video test (differential gain, differential phase, and/or even field, and the desired test signal type when prompted. If you selected the in-channel frequency response test, enter the frequency response line number, odd, even, or both fields, and the desired test signal type when prompted.

  • Page 132: Step 2. Select A Range Of Channels (Optional)

    System Measurements Creating a Test Plan Step 2. Select a range of channels (optional) CABLE TV ANALYZER , SYSTEM MEAS , More I of 2 , C r e a t e TstPlan 3. Enter the number of the first channel in the range of channels you want to measure.
  • Page 133 System Measurements Creating a Test Plan If you selected the carrier-to-noise and/or CSO test, enter the quiet line number and odd, even, or both fields when prompted. If you selected the in-channel frequency response test, enter the frequency response line number, odd, even, or both fields, and the desired test signal type when prompted.
  • Page 134 System Measurements Creating a Test Plan E N T E R u C h a n n e l i n r a n g e u s i n g t h e k e y p a d . ( E N T E R number) t h e n prsrr t h e E N T E R k e y ) Figure 3-14.

  • Page 135: Step 3. Save The Current Test Plan In Internal Memory

    System Measurements Creating a Test Plan Step 3. Save the current test plan in internal memory N O T E Test plans 1 through 5 are saved in trace registers 6 through 10 in the analyzer. 00 not save traces in trace registers 6 through IO or your test plans will be overwritten.
  • Page 136 System Measurements Creating a Test Plan 5. Because there can be up to Eve different test plans saved in analyzer memory, you need to select a number under which to save the test plan. Press the softkey with the plan number under which you want the test plan saved.

  • Page 137: Step 4. Save The Current Test Plan To A Ram Card (Optional)

    System Measurements Creating a Test Plan Step 4. Save the current test plan to a RAM card (optional) CABLE TV ANALYZER, SYSTEM MEAS, More 1 of 2, Create TstPlan, Save TstPlan. 3. Because there can be up to Eve different test plans saved in analyzer memory, you need to select a number under which to save the test plan Press the softkey with the plan number under which you want the test plan saved.

  • Page 138: Editing The Current Test Plan

    Editing the Current Test Plan 1. If Create TstPlan is not displayed, press @iGF), CABLE TV ANALYZER, SYSTEM MEAS, More I of 2. plan. 3. Press ENTER BY CHANNEL . 4. If you want to delete a channel, enter the channel number as a negative number.

  • Page 139: Clearing The Current Test Plan

    Clearing the Current Test Plan 1. If Create T&Plan is not displayed, press IhnoDE), CABLE TV ANALYZER, SYSTEM MEAS, More 1 of 2. This procedure describes how you can clear the current test plan. The current test plan is the test plan that is displayed when you press VIEW CH SEL , and it is the test plan that is used when making a measurement.

  • Page 140: Cataloging Analyzer Memory

    Cataloging Analyzer Memory 1. Press (SAVE_) or (RECALL). 4. Turn the large knob on the analyzer’s front panel to scroll down the catalog entries displayed on the analyzer screen. The test plans are saved in trace registers (TR) 6 through 10. 5.

  • Page 141: Recalling A Test Plan From A Ram Card

    Recalling a Test Plan from a RAM Card 1. If RECALL FRM CRD is not displayed, press [MODE], CABLE TW ANALYZER, Recall TstPlan. 3. Press the softkey with the plan number you want to recall. For example, press PLAN 1 to recall the test plan in plan number 1. 3-34...

  • Page 142: Recalling Test Data From The Ram Card

    Recalling Test Data from the RAM Card 1. If you have not done so already, connect the printer to the analyzer as described in “Step 3. Install a printer,” located in Chapter 1. More 1 of 2. 4. Use the large knob on the analyzer’s front panel to select the file that you want.

  • Page 143: Cataloging A Ram Card

    Cataloging a RAM Card 1. If CATALOG CARD is not displayed, press @i66FJ CABLE TV ANALYZER , SYSTEM MEAS , More 1 of 2 CATALOG CARD displays a catalog listing of all the files on a RAM or ROM card. 3-36...

  • Page 144: Formatting A Ram Card

    Formatting a RAM Card 1. Check that the switch on the RAM card to be formatted is set so the card is not write protected. 2. Insert the RAM card into the analyzer with the card’s arrow matching the raised arrow on the bezel around the card-insertion slot. 3.

  • Page 145: Deleting All The Files From A Ram Card

    Deleting All the Files from a RAM Card 1. Ensure the write-protect switch is set so that the RAM card is not write protected. 2. Insert the RAM card in the card reader. 3. Press [CONFIG), MORE 1 of 3 , Card Conf ig 5.

  • Page 146: Deleting Individual Files From A Ram Card

    Deleting Individual Files from a RAM Card 1. Ensure the write-protect switch is set so that the RAM card is not write protected. 2. Insert the RAM card in the card reader. 3. Press (SAVE_] or (RECALL). 6. Turn the large knob on the analyzer’s front panel until the file that you want to delete is highlighted.
  • Page 147 System Measurements Deleting Individual Files from a RAM Card...

  • Page 149: Error Messages

    The purpose of this chapter is to help you if you have a problem operating in cable TV analyzer mode. If the problem is related to the spectrum analyzer mode of operation, consult the documentation for the analyzer. This chapter is divided into the following sections: Problems that are indicated by error messages that appear on the analyzer display.

  • Page 150: Error Messages

    Error Messages If you press a softkey or a front-panel key while an error message is displayed, the analyzer may “remember” each key press. Therefore, we recommend that you do not press any keys while the error message is displayed on the analyzer display The error messages are listed alphabetically by the first word in the message.

  • Page 151: If You Have A Problem Error Messages

    If You Have a Problem Error Messages This message can be caused by the following: A test plan was not saved in the test plan number that you are trying to recall. If you are not sure of the test plan number, catalog the trace registers of analyzer memory as described in “Cataloging Analyzer Memory”...

  • Page 152: Caution - Stoptime Less Than Starttime. Set Stop Timeandtryagain

    If You Have a Problem Error Messages This message indicates that the ending date or time occurs before the starting date and time. To solve this problem: Reenter the stop date and time. Remember that the time is entered in a 24-hour, hour, minute format.

  • Page 153: Illegal Command

    If You Have a Problem Error Messages If you see this message while loading the HP 85721A personality into analyzer memory, it indicates that the analyzer’s firmware must be updated before the personality can be used. Check the Ermware date for your analyzer: Turn on the analyzer.

  • Page 154: Invalid Fileno Room

    If You Have a Problem Error Messages The message INVALID FILE NO ROOM indicates that there is not enough space available on the RAM card to save the hle. To solve this problem, you can delete one or all unwanted flies from the RAM card.

  • Page 155: No Card Found

    To solve this problem, insert the appropriate RAM or ROM card into the memory card reader. If you want to load the HP 85721A personality, insert the HP 85721A personality’s ROM card into the memory card reader. If you want to store or recall data, insert a RAM card into the memory card reader.

  • Page 156: Outofrange

    If You Have a Problem Error Messages The message OUT OF RANGE indicates that the value that you entered was not within the range for the function. To solve this problem: Enter values within the range for the function. See Chapter 3 for more information about using the cable TV analyzer functions.

  • Page 157: Printer Is Not Connected, Notturned On, Or Acontrollerconflictexists

    If You Have a Problem Error Messages This message indicates that the analyzer cannot “talk” to the printer. N O T E Plotters are not supported To solve this problem: 1. Make sure that the printer is turned on 2. Make sure that the analyzer is connected to the printer correctly. See “Step 4.

  • Page 158: Ram Card Required

    If You Have a Problem Error Messages This message indicates that you have instructed the HP 85721A personality to write information to a ROM card. A ROM card can only be read; a RAM card can both be read and written to.

  • Page 159: Other Problems

    Other Problems This section lists problems that are not indicated by an error message. If a test fails in mode If a test fails in the SYSTEM MEAS mode, confirm the failure using CHANNEL MEAS mode. This may involve disabling carriers or modulation according to FCC rules.

  • Page 160: If A "-" Appears In The Data Fields

    If You Have a Problem Other Problems appears in the data fields A I‘-)) appears in the data field if the test was not selected. If the test data for a channel is missing, check that the test has been selected.

  • Page 161: If The Test Results Are Not What You Expected

    If You Have a Problem Other Problems If the test results are not what you expected If the test results are not what you expected, it could be because of one of the following: Do not exceed the specified power input limit for the analyzer. C A U T I O N •I The input signal was not connected.

  • Page 162: If The Wrong Date Or Time Is Displayed

    If You Have a Problem Other Problems If the wrong date or time is displayed The analyzer has a real-time clock that is powered by an internal battery. If the real-time clock is set to the wrong time or date, use the following procedure to reset the time and date: 1.

  • Page 163: How To Contact Hewlett-Packard

    In the unlikely event something goes wrong with your analyzer, refer to the documentation for the analyzer about returning it for service. If you need to contact Hewlett-Packard for a problem with the HP 85721A personality, you can call your nearest Hewlett-Packard Sales and Service office listed in the following table.
  • Page 164 I f Y o u H a v e a P r o b l e m How to Contact Hewlett-Packard Hewlett-Packard Sales and Service Offices US FIELD OPERATIONS Headquarters California, Northern California, Southern Colorado Hewlett-Packard Co. Hewlett-Packard Co. Hewlett-Packard Co. Hewlett-Packard Co.
  • Page 165 If You Have a Problem How to Contact Hewlett-Packard...
  • Page 167 What You’ll This chapter contains the menu map and descriptions of the softkey functions Find in This sections: used in channel measurements mode. This chapter contains the following Chapter channel measurements menu map channel measurements softkey descriptions...

  • Page 168: Channel Measurements Menu Map

    Channel Measurements Menu Map The following menu map shows all channel measurement mode softkeys and how they are accessed.
  • Page 169 C h a n n e l M e a s u r e m e n t s M e n u M a p a n d Softkey D e s c r i p t i o n s Channel Measurements Menu Map L I S T E N O F F C H A N N E L...
  • Page 170 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Menu Map Figure 5.2. Channel Measurements Main Menu 2 of 3 5 - 5...
  • Page 171 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Menu Map Figure 5-3. Channel Measurements Main Menu 3 of 3 5 - 6...
  • Page 172 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Menu Map H O L D D S P L I N E O N / O F F C h a n g e Title A N A L O G + O N / O F F MORE Figure 5-4.

  • Page 173: Channel Measurements Softkey Function Descriptions

    Channel Measurements Softkey Function De- scriptions This section contains the descriptions of the channel measurements softkey functions. The functions are listed alphabetically according to the softkey labels.

  • Page 174: Channel Select Description

    Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions Description Channel select is a function used in conjunction with measurements. It sets up the analyzer state for cable TV tests, lets you select a specific channel number, and centers the specific channel on the analyzer screen. The channel is selected based on one of the Eve channel formats available in the Setup menu as described in Chapter 2: STD, AIR, HRC, IRC, or T.
  • Page 175 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions Procedure 1. To select a channel after the analyzer is preset or powered on, press the following analyzer keys: CABLE TV ANALYZER CHANNEL MEAS Enter the channel number, then press IENTER) (lower right-hand hardkey). See Figure 5-5.
  • Page 176 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions Hints 1. The visual carrier of a channel must be “on” before the function can CHANNEL SELECT correctly center the channel. 2. Do not use the data knob for selecting channels. 5-11...

  • Page 177: Dl Delta On Off Description

    Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions Description The display line delta function displays the change, in percent, between a reference display line and the display line activated by pressing DL DELTA ON OFF The percentage is displayed in the active function block. Procedure 1.
  • Page 178 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions R E F 6 0 . 1 9 rV AT 10 dB GRAT ANNOTRTN THRESHLD C h a n g e P r e f i x C E N T E R 7 7 . 2 9 8 NH? S P A N g H z Y R E S GW 1.G NHz Figure 5.7.

  • Page 179: Do Frq Resp Tst Description

    Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions Description DO FRQ RESP TST The frequency response measurement compares a spectrum stored at a reference point to a spectrum at any other point in the system where you want to evaluate the frequency response.
  • Page 180 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions 34: 37 NOV 23. 1993 Figure 5-8. System Frequency Response peak-to-valley values using the marker. For ease of use, it is recommended to press (SGLSWP) hardkey before using these keys. display the frequency response trace.
  • Page 181 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions Notes 1. Do not press without first recalling the reference to trace B. Using DO FRQ RESP TST automatically puts the trace into trace H. RECALL FRM INT Always press to exit the function, otherwise the...

  • Page 182: Gate On Off Description

    Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions The gating function allows you to make carrier-to-noise and composite second order (CSO) distortion measurements without turning off modulation (Option 107 required). The following procedure assumes that the GATING YES NO function in the Setup menu is set to NO.
  • Page 183 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions 5. Press the AVERAGE ON OFF softkey to perform a trace averaging function to smooth the trace. 6. In the carrier-to-noise measurement, press INTGRTN RNG SET to position the two markers within the desired measurement range.

  • Page 184: Listen On Off Description

    Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions The listen on function is available in analyzers with demodulation capability (Option 102). The listen-on function demodulates the aural carrier so that it is audible through the built-in speaker. Procedure 1.

  • Page 185: Recall Frm Int Description

    Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions The recall from internal memory function recalls a trace into trace B for use as a reference trace or to recall a system frequency response trace. This function simplifies recalling a trace from the analyzers internal memory. A trace can also be recalled from a memory card using procedures provided in the analyzer user’s guide.

  • Page 186: Save Trb To Int Description

    2. The message (ENTER O-5 or 11 ’ THRU MAX REG #’ > appears. Enter a trace register number between 0 and the MAX REG #, then press [ZYKJ Note that registers 6 through 10 are used by the HP 85721A personality. Therefore, it is recommended not to use these registers to save the reference trace.
  • Page 187 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions N O T E Another method of saving traces, internally or to a memory card, utilizes the functions under the Hint When using this function to save reference traces, be sure to record the trace register that each reference trace was saved under.

  • Page 188: Take Ref Trace Description

    Channel Measurements Menu Map and Softkq Descriptions Channel Measurements Softkey Function Descriptions Procedure A reference trace measurement can be made at any point in the system that you want to use as the “reference.” For example, typical reference spectrums can be set up at the output of the headend or AML hub. Thirty-two or more reference traces can be stored.
  • Page 189 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions 3. Sweep time is now the active function, if desired, adjust the sweep time before continuing the frequency response setup. If sweep time is not changed, the analyzer uses the default values. Continue the frequency response setup by selecting FAST SWEEP or SLOW SWEEP .
  • Page 190 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions START 64.8 STOP 425.8 YRES BW 5.8 MHz Figure 5-12. Conditioned Reference Spectrum memory. See the SAVE TRB TO INT function for more information about saving trace B. Wait until the message TRACE B SAVED appears before proceeding.
  • Page 191 Channel Measurements Menu Map and Softkey Descriptions Channel Measurements Softkey Function Descriptions AT 20 dB PEAK - 1 fRACE TO INT RECRLL FRM INT S T O P START 425.8 Figure 5-13. Trace B Saved to Internal Memory Hints is used for systems that do not have scrambled channels. However, the fast sweep is useful in making rough measurements and adjustments on systems with scrambled channels.

  • Page 192: View Co-Chnl Description

    Channel Measurements Menu Map and Softkey Descriptions This function allows the user to measure the relative power of any co-channel signal that is present. Procedure Observe the co-channel carrier in 10 kHz increments on either side of the main carrier by pressing the following analyzer keys: VIEW INGRESS VIEW CO-CHNL 1993...
  • Page 193 Channel Measurements Menu Map and Softkey Descriptions...
  • Page 195 This chapter contains the menu map and descriptions of the softkey functions used in system measurements mode. This chapter contains the following system measurements softkey descriptions...

  • Page 196: System Measurements Menu Map

    System Measurements Menu Map The following menu maps are a graphic representation of all system measurement softkeys and how they are accessed.
  • Page 197 System Measurements Menu Map and Softkey Oescriptions System Measurements Menu Map Figure 6-l. System Measurements Menu 1 of 2...
  • Page 198 System Measurements Menu Map and Softkey Descriptions System Measurements Menu Map Figure 6-2. System Measurements Menu 2 of 2 6 - 5...

  • Page 199: System Measurements Softkey Function Descriptions

    System Measurements Softkey Function De- scriptions This section contains the descriptions of the system measurements softkey functions. The functions are listed alphabetically according to the softkey labels. Allows you to stop the measurement. It may take several seconds for the measurement to end after ABORT has been pressed.

  • Page 200: Catalog Card Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to view a listing of the files stored on a RAM card or a ROM card. Figure 6-3 shows the catalog listing of a RAM card with test data files stored on it.
  • Page 201 The “t” indicates the file is a trace data file. [The test data and test plans are stored as trace data files.1 The “d’ indicates the file is a downloadable program file. IThe HP 85721A personality is stored as a downloadable program file.1 File name Every file on the RAM card has a file name.

  • Page 202: Clear Tests Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to clear all selected tests for the current channel. Press CABLE TV ANALYZER, SYSTEM MEAS, More 1 of 2, Create TstPlan, ENTER BY CBANNEL or ENTER BY RANGE , YES or NO to access CLEAR TESTS Allows you to clear the current test plan.

  • Page 203: Create Tstplan Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to access the functions used for building a test plan. Pressing Create TstPlan accesses ENTER BY CHANNEL , ENTER BY RANGE, Save T&Plan, VIEW CH SEL , and Prev Menu. Pressing CABLE TV ANALYZER SYSTEM MEAS, More 1 of 2 accesses C r e a t e T&Plan.
  • Page 204 System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions 15.0 Figure 6-4. An Example Printout 6 - 1 1...
  • Page 205 The analyzer serial number.? Whether or not the spectrum analyzer had an oven reference.+ The oven reference is available as ar option (Option 0041 for HP 8590 E-Series spectrum analyzers and is standard on the HP 85911: analyzer. The tune configuration.

  • Page 206: Done Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to indicate that you have finished making your selection. (The DONE softkey should not be confused with the DONE programming command. ) Allows you to have the test results sent to a printer when using Measure Measure Now or Timed The printer needs to be connected to...
  • Page 207 System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions 2 6 . 5 r V I S Figure 6.5. An Example Printout 6 - 1 4...
  • Page 208 The analyzer serial number.t Whether or not the spectrum analyzer had en oven reference.t The oven reference is available as a option [Option 0041 for HP 8590 E-Series spectrum analyzers and is standard on the HP 8591C analyzer. The tune configuration.

  • Page 209: Dump To Ram Card Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to store the test results on a RAM card when using Measure Now or Timed Measure The RAM card must be formatted and ready for use to store the test data.

  • Page 210: Dump To Screen Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to send test results to the analyzer screen. If data is sent to the screen, the following options are available: NEXT PAGE displays the next page of test results. PRINT REPORT prints a test results report.

  • Page 211: Enter By Channel Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to enter channels individually or to edit the test plan. A maximum of 158 channels (channel numbers 0, 2 through 158) can be entered into a test plan. Valid channels using Option 107 include 2 through 134.

  • Page 212: Enter Location Description

    Storing the location code in nonvolatile memory means that once a location code is entered, it will be used as the location code until a new location code is entered or the HP 85721A personality program is deleted from analyzer memory.

  • Page 213: Enter Temp Description

    Storing the temperature entry in nonvolatile memory means that once a temperature is entered, it will be used as the temperature until a new temperature is entered or the HP 85721A personality program is deleted from analyzer memory.

  • Page 214: Got0

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkay Function Descriptions Allows you to select a specific page of on-screen test results to view. Press CABLE TV ANALYZER, SYSTEM MEAS , Measure Now , Yes or No , DUMP TO SCREEN to access GOT0 PAGE , or press More 1 of 2 , VIEW LAST (if a measurement was previously made).

  • Page 215: Measure Now Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Accesses the functions that allow you to initiate the testing immediately (instead of initiating testing at a later time) and send the test results to the screen, a printer, or to a RAM card. Pressing Measure Now will display a screen that allows the option of selecting CTB testing.

  • Page 216: No Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to select not to do the function. If you press CLEAR TST PLAN and then press NO , you have selected not to clear the current test plan from analyzer memory.

  • Page 217: Plan 2 Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Recalling a test plan Recalling a test plan overwrites the current test plan. If you do not want the from plan 1 current test plan to be overwritten, save the current test plan before recalling a test plan.
  • Page 218 System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to select test plan 3 as the test plan number for either saving the current test plan or recalling a previously saved test plan. The operation of PLAN 3 is identical to PLAN 1 except that the test plan is stored in and recalled from trace register 8.

  • Page 219: Prev Menu Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to access the previous system measurement menu. Allows you to select the previous page of on-screen test results. Press CABLE TV ANALYZER, SYSTEM MEAS, Measure Now , Yes or No, DUMP TO SCREEN to access PREV PAGE Sea Also “Step 6.

  • Page 220: Recall Data Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to access DATA TO PRINTER and DATA TO SCREEN. DATA TO PRINTER sends the test results from a lile on a RAM card to a printer. DATA TO SCREEN sends the test results from a lile on a RAM card to the screen.

  • Page 221: Recall Frm Int Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to recall a previously saved test plan (from plans 1 through 5) from analyzer memory. Recalling a test plan overwrites the current test plan. If you do not want the current test plan to be overwritten, save the current test plan before recalling a new one.

  • Page 222: Recall Tstplan Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to access the softkeys used to recall a previously saved test plan from analyzer memory, or from a RAM card. Recalling a test plan overwrites the current test plan. If you do not want the current test plan to be overwritten, save the current test plan before recalling a new one.

  • Page 223: Save To Mem Crd Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions The location code, the temperature, the selection of CTB testing, and the setting for an external pad (EXT PAD YES NO ) are not stored with the test plan but are stored in nonvolatile analyzer memory and are retained until changed.

  • Page 224: Start Time Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to specify the time and the date when testing is to begin for timed measurements. The time is speciEed in 24-hour, hour, minute format; the date is speciEed in year, month, and day format. If you do not specify a time, the current time is used.

  • Page 225: System Meas Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Accesses the system measurement mode. When the analyzer is in the system measurement mode, SYSTEM is displayed in the upper right corner of the analyzer display. Pressing SYSTEM MEAS accesses the following: ENTER LOCATION , ENTER TEMP , Recall TstPlan , Measure Now , Timed Measure , Create TstPlan , Recall Data, CATALOG CARD , VIEW LAST, and VIEW CR SEL...

  • Page 226: Timed Measure Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to access the functions that you can use to initiate the testing at a later time. When you press Timed Measure , you access a menu with the following softkeys:.

  • Page 227: Time Interval Description

    System Measurements Menu Map and Saftkey Oescrtptions System Measurements Softkey Function Descriptions Allows you to specify the time interval between the starting of testing for a timed measurement. The time interval is specified in 24-hour, hour, minute format. The maximum time interval is 99 hours. If you do not specify a time interval, the time interval is set to zero.

  • Page 228: Today' S Date Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to select the current date as the start date or stop date for timed measurements. When you press TODAY'S DATE , the analyzer uses the date setting of the spectrum analyzer.

  • Page 229: View Ch Sel Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to view the selected channels of the current test plan Allows you to view the last test results on the analyzer screen. Upon being sent to the screen, the following options are available: NEXT PAGE displays the next page of test results.

  • Page 230: Yes Description

    System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions Allows you to confirm that you want to perform the function. If you press CLEAR TST PLAN and then press YES , you have selected to clear the current test plan from analyzer memory.
  • Page 231 System Measurements Menu Map and Softkey Descriptions System Measurements Softkey Function Descriptions...
  • Page 234 TV RECEIVER Menu Map The following menu map shows the TV receiver softkeys and how they are accessed. Figure 7-1. TV RECEIVER Menu Map...
  • Page 235 Setup Menu Map The following menu map shows the default configuration softkeys and how they are accessed. Figure 7-2. Setup Configuration Menu Map T h e CHANNEL MEAS SYSTEM MEAS softkey m e n u s a r e f o u n d i n C h a p t e r s 5 a n d 6 respectively.
  • Page 236 AUX CTRL Menu Map The following menu map shows the TV receiver softkeys found under the C T R L Figure 7-3. (AUX) Menu Map...

  • Page 237: Air Description

    This section contains the descriptions of the TV RECEIVER, C-1, and Setup softkey functions. The functions are listed alphabetically according to the softkey labels. Allows you to select the AIR tune configuration. The AIR is also called off-the-air or over-the air tune configuration. It refers to signals that are broadcast over the air and received with an antenna.

  • Page 238: Analyzer Input Description

    50 Q input impedances. The EXT PAD YES NO function compensates for amplitude loss caused by an external pad. An external preamplifier (or the internal preamplifier in HP 8591C analyzer) is used for the carrier-to-noise test. The external pad and preampliEer settings are stored in non-volatile analyzer memory.

  • Page 239: Channel Select Description

    TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions Allows you to select a specific channel number to view in TV receiver (or monitor TV) mode. In this mode, you can view a TV picture and listen to the sound simultaneously (Option 107 required).

  • Page 240: Description

    TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions The default value for the channel tuning configuration is the standard (STD) channel format. In addition, the USR CN 0 CNTR FRQ and USR CH 0 SPAN channel. This channel is then accessed by selecting channel 0 (zero). The default settings are for channel 2 (STD).

  • Page 241: Ext Amp Gain Description

    “Step 1. Configure the test system” in Chapter 2. Allows you to select the noise figure value of an external preamplifier for the carrier-to-noise test. The default value is 7 dB for the HP 85905A preamplifier. The preamplifier selection is stored in nonvolatile analyzer memory. This means that the analyzer retains the selection, even when power is turned off, until a new selection is made.

  • Page 242: Ext Amp Yes No Description

    This function is set to NO when the HP 85721A personality is loaded into analyzer memory. 7-11...

  • Page 243: Hrc Description

    Storing the setting in nonvolatile memory means that once the external pad function is set to YES, it will remain set to YES until you change the setting or delete the HP 85721A personality program from analyzer memory. Press CABLE TV ANALYZER , Setup, Analyzer Input to access...

  • Page 244: Irc Description

    TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions Allows you to select the incrementally related carriers (IRC) channel tuning If you do not select a channel tuning configuration, the default configuration is the standard (STD) configuration. The choices for the channel tuning configuration are: standard (STD), off-the-air (AIR), incrementally related carriers (IRC), harmonically related carriers (HRC), and T format.

  • Page 245: Picture On Off Description

    TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions Allows you to turn the TV picture on and off. This feature is the same as the TV RECEIVER mode of operation except that it is accessed from a front-panel Press [ml, Monitor TV to access PIC’MJRE ON OFF .

  • Page 246: Setup Description

    Allows you to access the softkeys used to set up defaults for channel tuning configuration, input configuration, non-interfering RF and video measurement The channel tuning conEguration softkeys include STD , AIR, IRC , HRC , T , USR CH 0 CNTR FRQ , and USR CH 0 SPAN The analyzer input conEguration softkeys include EXT PAD YES NO (50 0 spectrum analyzers only), EXT AMP YES NO , and TOTL PWR Q INPUT The non-interfering RF and video measurement conEguration softkeys include...

  • Page 247: Sound On Off Description

    TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions Allows you to turn the TV sound on and off. This feature is the same as the TV RECEIVER mode of operation except that it is accessed from a front-panel Press L-CTRL), Monitor TV to access SOUND ON OFF .

  • Page 248: Sys Bts Tst Chnl Description

    TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions Allows you to select a channel to perform system beats testing. The default is channel 4. If YES is selected after selecting Measure Now , system beats will be measured in the channel specified by SYS BTS TST CHNL .

  • Page 249: System Beats Description

    TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions The System Beats softkey is used to specify the channel you wish to use for testing beats. The default channel is 4. The default measurement frequency for CTB is 6 MHz above the visual carrier; the default measurement frequency for CSO is 4.75 MHz above the visual carrier.

  • Page 250: T Description

    TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions Allows you to select the T channel tuning configuration. As an alternative to making this selection, enter T channel numbers, 7 to 13, as negative numbers If you do not select a when any of the 4 other conEgurations are selected.

  • Page 251: Totl Pwr 0 Input Description

    TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions Allows you to measure the total power at the input of the analyzer. This function is primarily used automatically by tests to determine total input power to the analyzer so that the optimum input range for carrier-to-noise and CSOKTB testing can be set to avoid analyzer internally generated inter-mods.

  • Page 252: Usr Ch 0 Cmtr Frq Description

    TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions Allows you to define the center frequency for a user defined channel. This channel is then accessed by selecting channel 0 (zero). The setting defined here is stored in nonvolatile analyzer memory. This means that the analyzer retains the setting, even when power is turned off, until a new setting is made.
  • Page 253 TV Receiver, Setup, and AUX CTRL Menu Maps and Softkey Descriptions...

  • Page 255: What You'll Find In This Chapter

    This chapter describes the cable TV tests found in the Channel and System modes of operation. The test descriptions are as follows: visual carrier level and visual-to-aural level difference test visual carrier frequency and visual-to-aural frequency difference test composite second order (CSO) test composite triple beat (CTB) test hum test depth of modulation test...

  • Page 256: Visual Carrier Level And Visual-To-Aural Level Difference Test Description

    Visual Carrier Level and Visual-to-Aural Level Difference Test Description The visual carrier level test measures the peaks of the visual carrier, as well as the visual-to-aural level difference. To perform the visual carrier level and visual-to-aural level difference test, the analyzer does the following: 1.
  • Page 257 Test Descriptions Visual Carrier Level and Visual-to-Aural Level Cliff erence Test Description The aural carrier needs to be within 4.5 MHz (f0.4 MHz) of the visual carrier to be detected as the aural carrier. If the aural carrier cannot be detected, the visual-to-aural frequency difference measurement cannot be done and a I‘-”...

  • Page 258: Visual Carrier Frequency And Visual-To-Aural Frequency Difference Test Description

    2. In channel measurement mode, the frequency counter resolution can be changed to 10 Hz without affecting measurement accuracy. Refer to the specifications in the HP 8591C Calibration Guide. Figure 8-2 shows the analyzer measuring the visual and aural carriers.
  • Page 259 Test Descriptions Visual Carrier Frequency and Visual-to-Aural Frequency Difference Test Description The aural carrier needs to be within 4.5 MHz (+/-0.4 MHz) of the visual carrier to be detected as the aural carrier. If the aural carrier cannot be detected, the visual-to-aural frequency difference measurement cannot be done and a ‘-)) will appear in the system measurement test data for the channel.

  • Page 260: Carrier-To-Noise Ratio Test Description

    Carrier-to-Noise Ratio Test Description The result of the carrier-to-noise measurement is the ratio of the peak visual carrier level (modulated or unmodulated) to the noise measured in one of the manners described below. This ratio is normalized to a 4 MHz noise-power bandwidth.
  • Page 261 This can be the case when carrier-to-noise is >50 dB and carrier levels are less than 20 dBmV. Refer to the graphs in the speciEcations located in the HP 8591C Calibration Guide. N O T E External preamplifier usage can be enhanced by entering amplifier gain and noise figure values in the menu.
  • Page 262 Test Descriptions Carrier-to-Noise Ratio Test Description 1993 CHANNEL 69.490 MHz REF 5,7 dBmV -30.03 GTPOS O F F MEASUREMENT RnNC'E RNG SET ..........~..~..VA WE M A R K E R S D E F I N E...
  • Page 263 Test Descriptions Carrier-to-Noise Ratio Test Description 2. Disable modulation The second method is an interfering measurement of carrier-to-noise in and measure over FCC which modulation is removed. The marker is positioned within the displayed range FCC measurement range. Averaging can be selected to stabilize the noise measurement.
  • Page 264 Test Descriptions Carrier-to-Noise Ratio Test Description More Discussion about The carrier-to-noise test is very flexible and can handle a wide variety of the Carrier-to-Noise testing conditions. It provides feedback messages to assist you in achieving Test the optimum test setup. Like any cable TV active device, a spectrum analyzer has an ideal operating point which balances carrier-to-noise and carrier beats.
  • Page 265 Test Descriptions Carrier-to-Noise Ratio Test Description More about the Screen MORE INFO screen is intended to explain how the carrier-to-noise result is calculated and to MORE INFO assist you in making sure this result reflects the actual carrier-to-noise on the signal being measured. To assist you in adjusting the input level, the screen has several messages instructing MORE INFO...
  • Page 266 Test Descriptions Carrier-to-Noise Ratio Test Description More about the Screen (continued) MORE INFO Try raising level even more.: This message assumes the technique mentioned just above was followed but even more dynamic range is desired. It suggests following the above technique but raising the level 20, 30, or more T r y r e d u c i n g t h e i n t e r n a l a t t e n u a t o r .
  • Page 267 Test Descriptions Carrier-to-Noise Ratio Test Description Pressing CARRIER/NOISE can have different results depending on 2 keys in the setup menu, GATING YES/NO and PAUSE YES/NO . GATING set to NO and PAUSE set to YES are the best settings for initially becoming familiar with carrier-to-noise test.
  • Page 268 Test Descriptions Carrier-to-Noise Ratio Test Description Another difference between the non-gated and the gated variations of the test is the frequency range over which the noise is measured. The non- gated test measures the noise at the current marker position averaged with 1 position on either side.

  • Page 269: Composite Second Order (Cso) Test Description

    Composite Second Order (CSO) Test Description Three methods of measuring CSO are described here: channel CSO The analyzer measures the total cable TV system power and adjusts its input attenuation for optimum performance (refer to the graphs in Chapter 9). Distortion near noise corrections are used to more accurately measure distortion products less than 10 dB above the analyzer noise.
  • Page 270 Test Descriptions Composite Second Order (CSOI Test Description 1993 54.888 -33.83 GTPOS 56.768 SPAN 6.888 MHz WRES BW 38 kHz 6.98 Figure 8-5. Determining the level of the Beat Product and Noise Level System CSO This test is performed on the channel specified using the SYS BTS TST CHML softkey in the Setup menu.

  • Page 271: Composite Triple Beat (Ctb) Test Description

    Two methods of measuring CTB are described here: channel CTB system CTB The analyzer measures the total cable TV system power and adjusts its input attenuation for optimum performance (refer to the graphs in Chapter 9). Distortion near noise corrections are used to more accurately measure distortion products less than 10 dB above the analyzer noise.
  • Page 272 Test Descriptions Composite Triple Beat (CTB) Test Description 1. The visual carrier peak level of the test channel (default is channel 4) is measured. 2. Control line B of the analyzer auxiliary interface is set to a TTL-high level. 3. The center frequency of the analyzer is increased to the frequency of the test channel plus the CTB offset of 6 MHz (default setting of CTB FREQ OFFSET ).
  • Page 273 Test Descriptions Composite Triple Beat (CTBI Test Description The beat level is To accurately determine beat amplitude, the beat level is measured and measured compared with the level of the analyzer noise. If the difference between the beat level and the analyzer noise is less than 10 dB, the beat value cannot be measured directly;...
  • Page 274 Test Descriptions Composite Triple Beat (CTB) Test Description When CXVCTB is pressed the analyzer measures the total power at the input, the level of the channel to be measure,d, and the analyzer noise floor. Based on this information it decides what the analyzer attenuator should be set to.
  • Page 275 Test Descriptions Composite Triple Beat (CTBI Test Description More about the Screen MORE INFO screen is intended to explain how the CSO/CTB result is calculated and to assist MORE INFO you in making sure this result reflects the actual beat level on the signal being measured. To assist you in adjusting the input level, the screen has several messages instructing you to MORE INFO...
  • Page 276 Test Descriptions Composite Triple Beat (CT61 Test Description Once the optimum input power level is achieved, it does not need to be readjusted for each channel. All channels can be measured without further adjustments to the input level. The CSOKTB test has 2 variations. The Erst is the traditional method where the video modulation is either left on and the - 1.25 MHz CSO beat is measured at the lower channel boundary, or the carrier is turned off and the CTB &...

  • Page 277: Hum Test Description

    The hum test measures the percentage of amplitude modulation for low frequency disturbances (hum) by measuring the peak-to-peak variation for total hum. The Fast Fourier Transform (FFT) is also used to display the low frequency spectrum around the carrier. This information can be used to identify the source of hum.
  • Page 278 Test Descriptions Hum Test Description Selecting the MORE INFO softkey displays the low frequency spectrum around the visual carrier. The marker can be used to identify the frequency and level of interference relative to the carrier. Obtaining meaningful results even in the presence of video modulation is a great benefit. No one needs to be present at the headend to temporarily insert a carrier wave signal, and subscribers are not deprived of service.
  • Page 279 Test Descriptions Hum Test Description MKR A -29.850 msec REF 82 70 mV AT 10 dB 996 x PEAK MORE CORR INFO MAIN MENU SPAN 0 H Figure 8-6. HUM, Video Modulation On 1993 35.375 37.7 dBmV PEAK MAIN MENU 55.233 ilHz Figure 8-7.
  • Page 280 Test Descriptions Hum Test Description 1993 CHANNEL MKR A 128 Hz -53.70 dB REF 35.3 dBmV AT 10 dB CENTER 67.248 SPAN 8 H YVBW 1 MHz YRES BW Figure 8-8. HUM, More Information 8 - 2 7...

  • Page 281: Depth Of Modulation Test Description

    The depth of modulation test measures the percentage (50 to 93 percent measurement range) of amplitude modulation (AM) on the visual carrier. The analyzer measures the horizontal synchronization-pulse level and vertical interval test signal (VITS) white level from which it calculates the percentage Scrambled Channels The visual carrier AM modulation depth test may not be valid for scrambled channels, depending on the method used to scramble the channel’s signal.
  • Page 282 Test Descriptions Depth of Modulation Test Description Changes the amplitude The amplitude scale is changed from logarithmic (dB) to linear (volts) and scale and span of the the span is set to 0 Hertz to demodulate the signal and display time domain analyzer characteristics.

  • Page 283: Digital Channel Power Measurement Description

    The digital channel power measurement computes the total power within the specified bandwidth (between markers) of the selected channel. The result is recomputed after each sweep (if averaging is oil’) and displayed in current measurement units. With averaging on, the result is displayed after the number of specified sweeps has been reached.
  • Page 284 Test Descriptions Digital Channel Power Measurement Description We assume that the channel BW is at least 75% of the selected frequency span. Table 8-1. Auto Resolution Bandwidth (RBWI and Video Bandwidth NBW selection 3000 S P A N >- 1 2 M H z 1000 1 2 M H z >...
  • Page 285 Test Descriptions Digital Channel Power Measurement Description SEP 12, 1996 AT 10 dE -29.53 dBmVMRRKER markers) MENU STOP 318.88 NHz 28.8 Figure E-11. Results of Digital Channel Power Test 8 - 3 2...

  • Page 286: Color Test Descriptions (Chroma/Luma Delay Inequality, Differential Gain, Differential Phase)

    The color tests measure the chrominance-to-luminance delay inequality, differential gain, and differential phase (Option 107 required). The following steps must be considered when performing these measurements: 1. An appropriate test signal must be present or the test will not return meaningful results.
  • Page 287 Test Descriptions Color Test Descriptions (Chromalluma Delay Inequality, Differential Gain, Differential Phase) 1 9 9 3 R E F 1 4 2 . 6 mV 8 4 . 2 4 2 mV A U T O S I G S E A R C H S C T C C O R R T e s t...
  • Page 288 Test Descriptions Color Test Descriptions (Chromajluma Delay Inequality, Differential Gain, Differential Phase) Inequality Test Description N O T E The analyzer internal frequency calibration routine should be done at the temperature the test will be performed for best accuracy Non-standard timing between the 2T and 12.5T pulses will return values that are offset by up to 25 ns.
  • Page 289 Test Descriptions Color Test Descriptions (Chromalluma Delay Inequality, Differential Gain, Differential Phase) The composite test signal (FCC, NTC 7) is automatically selected. The analyzer then tunes to the luminance component and switches to 0 Hz span. Video averaging is performed and the center of the luminance component is found and converted to time.
  • Page 290 Test Descriptions Color Test Descriptions (Chromalluma Delay Inequality. Differential Gain, Differential Phase) Differential Gain Test The differential gain test measures the change in amplitude of the Description chrominance subcarrier as the luminance changes from a blanking level towards white level. The five-step riser portion of the test signal is used to perform this measurement.
  • Page 291 Test Descriptions Color Test Descriptions (Chromalluma Delay Inequality, Differential Gain, Differential Phase) Differential Phase Test The differential phase test measures the change in phase of the chrominance Description subcarrier as the luminance changes from a blanking level towards white level. The five-step riser portion of the test signal is used to perform this measurement.
  • Page 292 Test Descriptions Color Test Descriptions (Chromalluma Delay Inequality, Differential Gain, Differential Phase) MAR 06, 1995 CHRNNEL AT 10 dB MORE INFO MAIN MENU TART 183.000 300 kHz STOP 183.000 3 flHz Figure g-15. Differential Gain/Differential Phase 8 - 3 9...
  • Page 293 The in-channel frequency response test sets the analyzer to view full-field test signals such as multi-burst, sinX/X, or line sweep. In addition, it can view an in-channel sweep signal. The sweep signal can either be continuously or manually swept. Figure 8-16 is the result of manually sweeping a signal generator across the measurement range.

  • Page 294: In-Channel Frequency Response Test Description

    Test Descriptions In-Channel Frequency Response Test Description 0 4 5 8 N O V 2 3 . 1 9 9 3 C H A N N E L M K R 7 0 . 8 7 5 MHz R E F M A R K E R L O G M A R K E R 2...
  • Page 295 Test Descriptions In-Channel Frequency Response Test Description The following steps must be considered when performing these measurements: 1. An appropriate test signal must be present or the test will not return meaningful results. 2. Multiple test signals may be present and may return different results due to their point of origin.

  • Page 296: Fm Deviation Test Description

    Note that to perform this measurement, Option 102 is required on HP 8590 E-Series cable TV analyzers. This option is standard for the HP 8591C analyzer. The FM deviation test reports the maximum peak deviation found during 25 sweeps (or cycles). The number of cycles per measurement can be adjusted by pressing CYCLEWMSMT in Channel mode.

  • Page 297: Cross Modulation Test Description

    The cross modulation test measures the first 15.7 kHz cross modulation sideband relative to the visual carrier of the channel. Note that this test is only available in Channel mode. DEC 66, 1993 MENU CENTER 433.258 SPAN B H YRES BW Figure 8-18.

  • Page 298: System Frequency Response Test Description

    This test is used to compare the frequency response at a reference point in the system to any other points in the system. It can also be used to see how the frequency response changes with time or temperature. Start frequency, stop frequency, resolution bandwidth, video bandwidth, and reference level should be the same for the reference trace as the measurement trace.

  • Page 299: View Ingress Test Description

    The view ingress test measures any unwanted signals from outside the cable TV system which can cause degradation of the receiver’s quality. The view ingress test places a reference marker at the peak carrier level and activates the delta marker so that you can position it on the unwanted signal.

  • Page 300: View Co-Channel Test Description

    The view co-channel test measures the frequency and level of two signals within the same channel and within pickup distance of each other. If the co-channel level is high enough, the TV receiver will display two separate signals on one channel. Note that this test is only available in Channel mode.
  • Page 301 Test Descriptions View Co-Channel Test Description...

  • Page 302: Specifications And Test Aids

    Specifications and Test Aids...

  • Page 303: What You'll Find In This Chapter

    Specifications and Test Aids This chapter outlines the speciEcations and characteristics of the HP 85721A cable TV measurements and system monitor personality with supported analyzers. In addition, test aids are provided. This chapter contains the following sections: cable TV measurement speciEcations and characteristics...
  • Page 304 75 fI Spectrum Analyzer No selection required Measurements converted to 75 n values 50 f2 Spectrum Analyzer HP 8590 Series Option 711 Ext Pad Amplitude offset set to 5.8 dB No Ext Pad Amplitude offset set to zero Analyzer tunes to specified channels based upon selected tune Channel Selection configuration.
  • Page 305 Specifications and Test Aids Cable TV Measurement Specifications and Characteristics Precision Frequency Reference (Standard1 Resolution 1 0 0 H z Accuracy f 1 4 9 H z Option 704 Frequency Reference* 1 kHz Resolution Accuracy f 2 . 5 5 kHz 3 4 .

  • Page 306: Cable Tv Measurement Specifications And Characteristics

    Specifications and Test Aids Cable TV Measurement Specifications and Characteristics Percent AM is measured from horizontal sync tip to maximum video Depth of Modulation level; measurement requires a white-reference VITS and may not be valid for scrambled channels. AM Range 5 0 t o 9 3 % Resolution 0 .

  • Page 307: C/N, Cso, And Ctb Measurements

    “A preamplifier end preselector filter may be required to achieve specifications. attenuator. The following graphs summarize the HP 85721A personality characteristics for C/N, CSO, and CTB testing on cable TV systems with up to 77 channels and no amplitude tilt. C/N, CSO, and CTB measurement accuracies and ranges can be read from the relevant graphs.
  • Page 308 Specifications and Test Aids Cable TV Measurement Specifications and Characteristics C T B A c c u r a c y Horizontal-line 115.7 kHz\ related AM is measured on the unmodulated Crossmodulation visual carrier. Range 0 . 1 dB Resolution Accuracy 9 - 7...

  • Page 309: System Frequency Response (Flatness)

    Specifications and Test Aids Cable TV Measurement Specifications and Characteristics System amplitude variations are measured relative to a reference trace stored during the setup. Frequency Response Setup Fast Sweep Time 2 s [default1 for no scrambling Slow Sweep Time Reference-Trace Storage 50 traces that include analyzer states 1 .

  • Page 310: Video Measurements

    5 0 M H z t o 850 M H z Frequency Range Amplitude Range Coupler [HP part number 095507041 Insertion loss: < 2 dB C o u p l e d o u t p u t : - 9 dB 1L0.5 dB For +20 dBmV signal level at coupler input end room temperature.

  • Page 311: Channel Identification Plans

    Table 9-l. FCC Numerical Designation of Television Channels (Section 73.603) Channel Number Frequency Band (MHz) 66-72 76-82 82-88 192-198 476-482 482-488 488-494 5 1 2 - 5 1 8 518-524 536-542 542-548 548-554 9-10...
  • Page 312 Specifications and Test Aids Channel Identification Plans Table 9-1. FCC Numerical Designation of Television Channels (Section 73.603) (continued) Channel Number Frequency Band (MHz) 578-584 584-590 602-608 6 1 4 6 2 0 626-632 632-638 668-674 692-698 710-716 716-722 722-720 726-734 734-740 746-752 752-758...
  • Page 313 Specifications and Test Aids Channel Identification Plans Table 9-l. FCC Numerical Designation of Television Channels (Section 73.603) (continued) Channel Number Frequency Band (MHz) 770-776 776-782 788-794 794800 9-12...
  • Page 314 Specifications and Test Aids Channel Identification Plans Table 9-2. Channel Identification Plan EIA Interim Standard No. 6 (CPI and FCC Part 76.612 Picture Carrier Frequency Historical Channel Designation Reference H R C 72.0036 73.2625 55.25 54.0027 55.2625 6 1 . 2 5 60.0030 61.2625 67.25...
  • Page 315 Specifications and Test Aids Channel Identification Plans Table 9-2. Channel Identification Plan EIA Interim Standard No. 6 (CPI and FCC Part 76.612 (continued) Channel Picture Carrier Frequency Historical Designation Reference H R C 259.2625 258.0129 259.2625 265.2625 264.0132 265.2625 271.2625 270.0135 27 1.2625 271.2625...
  • Page 316 Specifications and Test Aids Channel Identification Plans Table 9-2. Channel Identification Plan EIA Interim Standard No. 6 (CPI and FCC Part 76.612 (continued) Channel Picture Carrier Frequency Historical Designation Reference H R C 415.25 414.0207 415.2625 421.25 420.0210 421.2625 427.25 426.0213 427.2625 432.0216...
  • Page 317 Specifications and Test Aids Channel Identification Plans Table 9-2. Channel Identification Plan EIA Interim Standard No. 6 KP) and FCC Part 76.612 (continued) Channel Picture Carrier Frequency Historical Designation Reference S T D H R C 577.25 576.0288 577.2625 583.25 582.0291 583.2625 588.0294...
  • Page 318 Specifications and Test Aids Channel Identification Plans Table 9-2. Channel Identification Plan EIA Interim Standard No. 6 (CP) and FCC Part 76.612 (continued) Channel Picture Carrier Frequency Historical Reference Designation H R C 1 1 1 715.2500 714.0357 715.2625 1 1 2 721.2500 720.0360 721.2625...
  • Page 319 Specifications and Test Aids Channel Identification Plans Table 9-2. Channel Identification Plan EIA Interim Standard No. 6 (CP) and FCC Part 76.612 (continued) Historical Picture Carrier Frequency Channel Reference Designation H R C 889.2625 889.2500 888.0444 895.2625 894.0447 895.2500 901.2625 901.2500 900.0450 907.2625...
  • Page 320 Specifications and Test Aids Channel Identification Plans Table 9-3. FM Broadcast Channels Channel No. Frequency (MHz) 88.1 88.3 88.5 88.7 88.9 89.1 89.3 89.5 89.7 2 1 0 89.9 2 1 1 90.1 2 1 2 90.3 2 1 3 90.5 2 1 4 90.7...
  • Page 321 Specifications and Test Aids Channel Identification Plans Table 9-3. FM Broadcast Channels (continued) Channel No. Frequency (MHz) 94.9 95.1 95.3 95.5 95.7 95.9 96.1 96.3 96.5 96.7 96.9 97.1 97.3 97.5 97.7 97.9 98.1 98.3 98.5 98.7 98.9 99.1 99.3 99.5 99.7 39.9...
  • Page 322 Specifications and Test Aids Channel Identification Plans Table 9-3. FM Broadcast Channels (continued) Channel No. Frequency (MHz) 1 0 1 . 7 1 0 1 . 9 102.1 2 7 1 102.3 102.5 102.7 102.9 103.1 103.3 103.5 103.7 103.9 104.1 104.3 104.5...
  • Page 323 Specifications and Test Aids Channel Identification Plans Table 9-4. T-Channels Standard Color Sound Channel Video 1 1 . 5 0 7.00 10.58 16.58 17.50 13.00 23.50 19.00 22.58 28.58 29.50 25.00 35.50 34.58 31.00 41.50 37.00 40.58 47.50 T 1 3 43.00 46.58 9 - 2 2...

  • Page 324: Channel Survey Map

    The following channel survey map is intended to be used as a test aid. Line numbers of quiet lines and test signals should be documented for each channel in your system. This is especially useful when creating test plans in system measurement mode.
  • Page 325 Specifications and Test Aids Channel Survey Map...
  • Page 326 Specifications and Test Aids Channel Survey Map Channel Line Number Number O d d...
  • Page 327 Specifications and Test Aids Channel Survey Map Even 1...
  • Page 328 Specifications and Test Aids Channel Survey Map...
  • Page 329 Specifications and Test Aids Channel Survey Map 9 - 2 8...
  • Page 330 Specifications and Test Aids Channel Survey Map...
  • Page 331 Specifications and Test Aids Channel Survey Map...
  • Page 332 Specifications and Test Aids Channel Survey Map...
  • Page 333 Specifications and Test Aids...
  • Page 334 Glossary...
  • Page 335 Glossary active function The active function is the instrument’s feature currently selected for use. It may be a key selection or remote-programming command. active function readout The area of a display screen where the active function and its state are displayed.
  • Page 336 The auxiliary interface contains control lines A and B. The voltage levels of control lines A and B are changed by some of the HP 85721A’s tests. bandwidth selectivity This is a measure of the analyzer’s ability to resolve signals unequal in amplitude.
  • Page 337 character set The set of elementary symbols. These normally include both alpha and numeric codes, plus punctuation or any other symbol that may be read, stored, or written and used for organization, control, or representation of data. This is the tune delay between the low frequency luminance component and the high frequency chrominance component of the 12.5T pulse in the test signal.
  • Page 338 current trace The displayed trace on the analyzer screen. default The preset conditions, options, or parameters of an instrument. The default state may be changed by choosing key selections or writing programming commands to use other conditions. delta marker An analyzer mode in which a fixed reference marker is established, then a second active marker becomes available so it can be placed anywhere along the trace.
  • Page 339 information immediately and do not store, then recall the data to the screen), these differences are displayed on the screen and the graticule is used to evaluate the measurement. Many analyzers with digital displays (refer to digital display) have markers that can be used to measure the signal.
  • Page 340 the instrument, is classified as ROM (read-only memory). The Ermware determines the operating characteristics of the instrument or equipment. Each firmware version is identiEed by a revision code number, or date code. FM deviation Peak deviation of the audio FM signal of a cable TV channel. frequency accuracy The uncertainty with which the frequency of a signal or spectral component is indicated, either in an absolute sense or relative to some...
  • Page 341 variation in local oscillator frequency (drift) with respect to the sweep ramp causes a signal to shift its horizontal position on the display slowly. Shorter-term local oscillator instability can appear as random FM or phase noise on an otherwise stable signal. front-panel key Keys, typically labeled, located on the front panel of an instrument.
  • Page 342 The abbreviation for Hewlett-Packard Interface Bus. It is a Hewlett-Packard proprietary parallel interface that allows you to connect more than one device to a port on a computer or instrument. The HP-IB bus is also called the IEEE-488 bus. in-channel frequency response Frequency response test that measures the flatness of an individual cable TV channel.
  • Page 343 limit line A test limit made up of a series of line segments, positioned according to frequency and amplitude within the analyzer’s measurement range. Two defined limit lines may be displayed simultaneously. One sets an upper test limit, the other sets a lower test limit. Trace data can be compared with the limit lines as the analyzer sweeps.
  • Page 344 measurement range The ratio, expressed in dB, of the maximum signal level that can be measured (usually the maximum safe input level) to the lowest achievable average noise level. This ratio is almost always much greater than can be realized in a single measurement. Refer also to dynamic range. memory A storage medium, device, or recording medium into which data can be stored and held until some later time, and from which the entire original...
  • Page 345 normalized reference position The position on a network analyzer’s display of the normalized reference level. off-the-air tune configuration The tune conEguration for signals that are broadcast over the air and received with an antenna. over-the-air tune configuration See off-the-air tune configuration. oven reference An analyzer that has an oven reference has increased absolute frequency-reference accuracy because the internal oscillators are...
  • Page 346 Any analyzer programming command having the distinct function of returning a response. These commands may end with a question mark analyzer display. quiet line A horizontal line with no video modulation used when performing non-interfering measurements of carrier-to-noise and CSO. random-access memory RAM (random-access memory) or read-write memory, is a storage area allowing access to any of its storage locations.
  • Page 347 RS-232 A means of communication between devices, such as printers, plotters, computers, modems, and analyzers. (The devices need to have RS-232 interfaces). Unlike the HP-IB interface bus, the RS-232 interface bus is used for serial (not parallel) transmission. scale factor The per-division calibration of the vertical axis of the display.
  • Page 348 standard tune configuration The tune conEguration in which the channels are at the frequencies that the Electronic Industries Association (EIA) and FCC define to be the standard channel frequencies. See standard tune configuration stop/start frequency Terms used in association with the stop and start points of the frequency measurement range.
  • Page 349 syntax The grammar rules that specify how commands must be structured for an operating system, programming language, or applications. system frequency response Frequency response test that measures the flatness of the entire system. trace A trace is made up of a series of data points containing frequency and amplitude information.
  • Page 350 video A term describing the output of an analyzer’s envelope detector. The frequency range extends from 0 Hz to a frequency that is typically well beyond the widest resolution bandwidth available in the analyzer. However, the ultimate bandwidth of the video chain is determined by the setting of the video Iilter.
  • Page 351 zero span The case in which an analyzer’s local oscillator remains fixed at a given frequency so that the analyzer becomes a fixed-tuned receiver. In this state, the bandwidth is equal to the resolution bandwidth. Signal amplitude variations are displayed as a function of time. To avoid loss of signal information, the resolution bandwidth must be as wide as the signal bandwidth.
  • Page 352 video A term describing the output of an analyzer’s envelope detector. The frequency range extends from 0 Hz to a frequency that is typically well beyond the widest resolution bandwidth available in the analyzer. However, the ultimate bandwidth of the video chain is determined by the setting of the video filter.
  • Page 353 Index...
  • Page 354 Index 100 kHz RES BW key, 2.60 5th PKT YES NO key, 2-39 ABORT key, 3-15 access cable TV analyzer mode, 1~14 accessing spectrum analyzer mode, 2-62, 3.18 accessing the memory card, 1-6 accessing the TV receiver mode, 2-63, 3.19 AIR description, 7-6 AIR key, 2-4, 3-4 ALL TESTS description, 6-6...
  • Page 355 auxiliary interface, 8- 19 AVERAGE ON OFF key, 2- 18, 5- 18 BAUD RATE key, l-11 beat level, changes with attenuation, 2-27 beats, measure between standard offsets, 2-27 BK SP key, 3-10, 3-22, 3-31 BLANK CARD key, 3-38 how to access, 1~14 CABLE TV ANALYZER key, 2- 11, 5- 10 cable TV signal, connect, 2-9 cable TV signal, connecting, 2-10...
  • Page 356 AIR, 2-4, 3-4, 5-9 displayed position, 3-4 HRC, 2-4, 3-4, 5-9 IRC, 2-4, 3-4, 5-9 STD, 2-4, 3-4, 5-9 T, 2-4, 3-4, 5-9 channel measurements, list of, 2-2 channel number range, 6-18 channel numbers, 5- 10 channel numbers, entering, 5-10 channel numbers, valid, 3-23 CHANNEL SELECT description, 5-9, 7-8 channel selection, view, 6-36...
  • Page 357 9-3 DELETE FILE key, 3-39 delete files from a RAM card, 3-38 delete HP 85721A personality, l-15 delete individual files from RAM card, 3-39 deleting a channel from the test plan, 3-31 deleting a test for a channel, 3-31...
  • Page 358 DL DELTA ON OFF description, 5-12 DL DELTA ON OFF key, 2-35 DO FRQ RESP TST description, 5-14 DO FRQ RESP TST key, 2-57, 5-14 DONE description, 6-13 DONE key, 3-24, 3-26 DSP LINE ON OFF key, 5-12 DUMP TO PRINTER description, 6-13 DUMP TO PRINTER key, 3- 14, 3-2 1 DUMP TO RAM CARD description, 6-16 DUMP TO RAM CARD key, 3-15, 3-21...
  • Page 359 NO TEST PLAN SELECTED, 4-8 OUT OF RANGE, 4-9 PLEASE SELECT A CHANNEL, 4-9 PRINTER IS NOT CONNECTED, 4-10 RAM CARD IS NOT FORMATTED, 4-11 RAM CARD REDUIRED, 4-11 test results not what you expected, 4- 14 VIDEO SYNC NOT RECOGNIZED, 2-16, 4-11 excessive analyzer input voltage, 2-5 EXT AMP GAIN description, 7- 10 EXT AMP GAIN key, 2-6, 3-6...
  • Page 360 FORMAT CARD key, 3-37 FREQ ON OFF key, 2-12 FREQ RSLN 10 100 Hz key, 2-12 frequency allocations, Q-10 FREQUENCY key, 5-14, 5-23 frequency response setup, 8-45 frequency response, using two points, 2-59 FRQ RSLN 10 100 Hz key, 2-12 gain, amplifier, 7-10 gated measurement, channel meas.
  • Page 361 LINE SEARCH key, 2-16, 5-17 LISTEN AT MKR key, 2-60 LISTEN ON OFF description, 5-19 LISTEN ON OFF key, 2-60 LOAD FILE key, l-7 loading the HP 85721A personality, 1-4 location code entering, 3- 10 range, 6- 19 Index-9...
  • Page 362 MAIN MENU key, 2-60 map, channel survey, 9-23 MARKER DELTA key, 5- 15 MARKER OFF key, 2-58, 5-15 MARKER ON key, 2-58, 5-15 MARKER A key, 2-58 matching impedance, 7- 11 matching pad, 50 ohm analyzers, 2-5 MAX HOLD ON OFF key, 2-12 maximum input level, 2-9, 3-8 measurements carrier level and frequency, 2-12...
  • Page 363 PLEASE SELECT A CHANNEL, 2-15, 2-26 REGISTER #, 5-20 (See MORE INFO), 2-15 SETUP FINISHED SAVE THIS REFERENCE TRACE,5-24 TRACE B SAVED, 5-25 minimum hold function, 2-61 missing files, 4- 12 MODE key, l-14, 5-23 modulated staircase, diff gain/phase, 2-38 Monitor TV description, 7-13 MORE INFO key, 2-19, 2-34, 2-41, 2-48, 2-52 More key, 2-27...
  • Page 364 2-6 default noise figure, 2-6 enter gain, 2-6 enter noise figure, 2-6 external, 2-6, 2-19, 3-6 internal (HP 8591C), 2-19, 3-6 needed for carrier to noise, 2- 15 Prev Menu description, 6-26 PREV PAGE description, 6-26 Print Conflg, 1-l 1...
  • Page 365 3- 17 RS-232 interface, l-11 setting the baud rate, 1-l 1 setting the HP-IB address, l- 11 PRINTER ADDRESS key, 1-l 1 PRINTER IS NOT CONNECTED error message, 4-10 printing the test data stored on a RAM card, 6-10...
  • Page 366 resolution bandwidth, 2-60 RESTART AVERAGING key, 2-27 results, print, 2-12 results to screen, 6-17 ripple, 5- 14 RS-232 interface, Option 043, 1-11 run a test later, 3-20 run a test now, 3-14 safety symbols, viii sales and service office, 4-16 sales and service office table, 4-17 SAVE key, 3-33, 3-39, 5-22 SAVE TO INT MEM description, 6-29...
  • Page 367 setup gated meas, channel mode, 2-6 Setup key, 2-4, 3-4 signal connections to analyzer, 2-9, 3-8 SIN X/X key, 2-52 sin x/x test signal, 2-51 SLOW SWEEP key, 2-57, 5-24 smoothing trace, 2-18 guide conventions, xiii system menu map, 6-3 software product license agreement, iii-7 SOUND ON OFF description, 7-16 span, user defined channel, 7-21...
  • Page 368 STORE TO CARD description, 6-30 STORE TO CARD key, 3- 17 storing calibration results, l-8 storing test results, 6-16 supported analyzers, 1-2 support information, 9-2 survey map, 9-23 survey system, 3-22 swept in-channel freq response, 2-51 SWP TEST SETUP key, 2-51 SYS BTS TST CHNL description, 7 17 SYS BTS TST CHNL key, 3-7, 3-14 System Beats description, 7-18...
  • Page 369 view ingress, 8-46 visual carrier frequency, 8-5 visual carrier level, 8-3 visual-to-aural carrier frequency difference, 8-5 visual-to-aural level difference, 8.3 testing, system mode, 3-14 test list, system mode, 3-2 test plan creating, 3-22 definition, 3-22 recalling test plan from analyzer memory, 3-12 what is recalled with the test plan, 6-24 test plan contents, 6-23 Test Plan description, 6- 10...
  • Page 370 frequency response, 514 frequency response setup, 5-23 gated measurements, 5-17 HRC tune configuration, 7-12 hum measurement, 2-48 inchannel frequency response, 2-51 initiate immediate measurement, 6-22 IRC tune configuration, 7-13 listen on off, 5-19 list files on RAM card, 6-7 main menu, 6-21 no, 6-23 off the air, 7-6 picture and sound, 7-14...
  • Page 371 user defined span, 7-2 1 view channel selection, 6-36 view ingress, 2-60 view last test results, 6-36 yes, 6-37 tests, channel, 2-2 tests, clear all, 6-9 test signal line entry, system mode, 3-23, 3-26 test signal search, auto diff gain/phase, 2-37 test signals, in-channel freq response, 2-53 test signals, in-channel frq test, 2-51 test signal timing, 2-23...
  • Page 372 tune configuration, IRC, 7-13 tune configuration. selecting, 7-8 tune configuration, STD, 7-16 TV frequencies, 9- 10 TV IN connector, 2-9 TV line, 2-31 TV LINE # key, 2-32 TV RECEIVER description, 7-20 TV RECEIVER key, 2-63, 3-19 TV receiver mode how to access, 2-63, 3-19 TV sync, 2-31 TV TRIG EVEN FLD key, 2-34...
  • Page 373 time, l-8 warning the warning symbol, viii warranty, vi waveform analyzer, depth mod., 2-33 white noise, 2-31 WINDOWS, 3- 19 WINDOWS keys, 2-63 wrong date or time is displayed, 4-15 YES description, 6-37 Index-2 1...

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