HP 83751A User Manual

Synthesized sweepers.
Hide thumbs
HP 83751A/B and
HP 83752AlB
Synthesized Sweepers
User's Guide

Advertising

   Related Manuals for HP 83751A

   Summary of Contents for HP 83751A

  • Page 1

    User’s Guide...

  • Page 2

    HP part number: 83750-90004 Printed in USA March 1996 This manual applies directly to instruments with serial prefix 3610A and below. This manual also applies to Ermware revision 2.0 and above. For Ermware revisions below 2.0 contact your nearest Hewlett-Packard service center for a Ermware upgrade.

  • Page 3

    The HP 83751A/B provides a frequency range of 2 to 20 GHz, while the HP 83752A/B provides a frequency range of 10 MHz to 20 GHz. The “B” versions of both the HP 83751 and HP 83752 provide high power output (approximately + 17 dBm maximum leveled power).

  • Page 4

    The Synthesized Sweeper at a Glance The following Egure and accompanying text explain some features of the sweeper. The Synthesized Sweeper...

  • Page 5

    6. The date entry keys are used to enter 12. The displays show the current values of 1. The (m) and (m) k e y s and/or modify various sweeper parameters. sweeper parameters as well as the status of are used to save and subsequently recall many of the sweeper functions.

  • Page 6

    In This Book This book is divided into two sections: the task reference and the dictionary reference. These sections are subdivided into chapters. The task reference section (identified by light blue tabs) provides step-by-step instructions for many of the tasks that you perform with your sweeper. The chapters in the task reference section are as follows: Chapter 1 “Performing the Operator’s Check, )) contains a procedure for...

  • Page 7

    “Modulation Keys,’ explains the functions of the keys in the Chapter 10 Mod group. “Frequency Keys,” explains the functions of the keys in the Chapter 11 Frequency group. Chapter 12 “Sweep Keys,” explains the functions of the keys in the Sweep group.

  • Page 8

    Certification Hewlett-Packard Company certihes that this product met its published specifications at the time of shipment from the factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institute’s calibration facility, and to the calibration facilities of other International Standards Organization members.

  • Page 9

    Warranty This Hewlett-Packard instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment. During the warranty period, Hewlett-Packard Company will, at its option, either repair or replace products which prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by Hewlett-Packard.

  • Page 10

    Assistance Product maintenance agreements and other customer assistance agreements are available for Hewlett-Packard products. the following page.

  • Page 11

    Hewlett-Packard Sales and Service Offices IN THE UNITED STATES IN AUSTRALIA IN JAPAN California Hewlett-Packard Australia Ltd. Yokogawa-Hewlett-Packard Ltd. Hewlett-Packard Co. 31-41 Joseph Street 29-21 Takaido-Higashi, 3 Chome 1421 South Manhattan Ave Blackburn, Victoria 3130 Suginami-ku Tokyo 168 895-2895 Fullerton, CA 92631 IN CANADA 17141 999-6700 IN PEOPLE’S REPUBLIC...

  • Page 12

    Safety Notes The following safety notes are used throughout this manual. Familiarize yourself with each of the notes and its meaning before operating this instrument. caution note denotes a hazard. It calls attention to a procedure tihich, C A U T I O N if not correctly performed or adhered to, could result in damage to or caution destruction of the instrument.

  • Page 13

    General Safety Considerations make sure it has been properly Before this instrummt switched on, W A R N I N G grounded through the protective conductor of the ac power cable to a socket outlet provided with protective earth contact. This is a Safety Class I product (provided with a protective earthing ground incorporated in the power cord).

  • Page 14

    How to Use This Guide This represents a key physically located on the instrument. SHIFT FUNCTION This represents a shift function (blue text above front panel keys). Text in this font represents FREQUENCY, MARKER/SWEEP/STATUS, and POWER displays. Text in this font represents the annunciators that ANNUNCIATOR are displayed in the lower portion of the sweeper display.

  • Page 15

    2-11 (high power) sweepers ....(standard power) sweepers ....See also .....

  • Page 16

    7. Front/Rear Panel 7-10 7-13 7-15 7-16 7-17 7-18 7-23 7-25 7-26 7-26 7-27 8-11...

  • Page 17

    ..........10-4 (PULSE MODE 8) 10-7...

  • Page 18: Table Of Contents

    15-6 15-7 2 - CW PEAKNG ..15-8 15-9 15-10 ....16-3 The Error/Event Queue ....16-4 Error numbers 16-5...

  • Page 21: Table Of Contents

    7-3. Auxiliary Interface Connector ....7-4. HP-B Connector and Cable ....

  • Page 22

    Contents ... 17-12 17-3. Typical Phase Noise (10 GHz Carrier) 17-4. Dimensions ..... . . 17-17...

  • Page 23

    ..... . . 14-1. Step Sizes 15-4 ..15-1. Special Functions for the HP 83750 Series Sweepers ..15-19 15-2. FM Sensitivity When Using Source Modules...

  • Page 24

    Performing the Operator’s Check...

  • Page 25

    Performing the Operator’s Check The operator’s check consists of a series of tasks that, when completed, will either assure you that your instrument is operating correctly, or will help to point to problem areas if it is not. The operator’s check does ensure performance to specifications.

  • Page 26

    Attention! All external cables [including HP-IB and BNC cables) must be disconnected from the sweeper prior to running the full self-test. Failure to do so may cause self-test failures or lock-ups. 1. Disconnect all external cables prior to running the self-test.

  • Page 27

    Performing the Operator’s Check To run the full self-test 4. When the self-test routine is mushed, a message will appear in the MARKER/SWEEP/STATUS display. If the message does not say refer to the section entitled “If You Have a Problem” at the end of this chapter. The full self-test is actually a series of tests performed to check different instrument functions.

  • Page 28

    1. Before running peak power-tracking, make sure the RF OUTPUT is either connected in a 50 0 system, or has a load on it, such as a power sensor or attenuator. For optimum power at all frequencies, do not run peak power-tracking with a C A U T I O N millimeter head connected to the sweeper.

  • Page 29

    3. Press and enter the specified maximum leveled power for POWER LEVEL your instrument. (For an HP 83752B, set the power to the specikation for < 2 GHz.) H P 8 3 7 5 1 8 ” H P 837528”...

  • Page 30

    Annunciator location UNLEV The HP 83752B sweepers have a power specification that is split at 2 GHz. 7. Press the following keys to set a sweep range of 2 GHz to 20 GHz and a power level of 17 dBm (or 16 dBm for instruments with option 1El):...

  • Page 31

    1. Connect the equipment as shown. POWER METER SYNTHESIZED SWEEPER POWER SENSOR ADAPTER Figure 1-2. Connections for Checking Output Power Press (PRESET_). Press ccw) (ZiJ CGHz/dB(mL). Press and enter the specified power for the CW frequency LEVEL you set. Refer to the following table. Terminate the power level entry by pressing (GHz/dB(mZ).

  • Page 32

    Make sure that the UNLEV annunciator doesn’t light. (If the annunciator does light, this indicates an unleveled condition.) 7. Repeat steps 3 through 6 for the following setting(s): 2.5 GHz 1.5 GHz - for HP 83752AA instruments only 50 MHz - for HP 83752A/B instruments only...

  • Page 33

    Make sure all external cables are disconnected from the sweeper and run the self-test again. If the test still fails, send the instrument to an HP service center for repair, including a description of the failed test and any other error messages.

  • Page 34

    Performing the Operator’s Check Make sure that the RF OUTPUT connector was terminated before the peak power-tracking sequence was run, and before the maximum leveled power check. Make sure the power you entered in steps 2 and 5 of the maximum leveled power check procedure are correct for your particular instrument.

  • Page 35

    Externally Leveling the Sweeper...

  • Page 36: Power

    Externally Leveling the Sweeper In externally leveled operations, the output power from the sweeper is detected by an external sensor. The output of this detector is returned to the leveling circuitry, and the output power is automatically adjusted to keep power constant at the point of detection.

  • Page 37

    1. Connect the equipment as shown in Figure 2-1. SYNTHESIZED SWEEPER DIRECTIONAL COUPLER OR POWER SPLITTER) Figure 2-1. ALC Circuit Externally leveled Press MODE shows Note that the EXT ALC annunciator is lit. 3. Enter the coupling factor by selecting m EXT CAL and then entering the desired number.

  • Page 38

    ALC system to set the desired RF output. Figure 2-2 shows the input power versus output voltage characteristics for typical HP diode detectors. From the chart, the leveled power at the diode detector input resulting from any external level voltage setting may be determined.

  • Page 39: Typical Diode Detector Response At 25 "c

    Externally Leveling the Sweeper leveling with detectors/couplers/splitters Figure 2-2. Typical Diode Detector Response at 25 ‘C 2 - 5...

  • Page 40: Mode

    Externally leveling the Sweeper leveling with detectors/couplers/splitters Some external leveling applications require low output power from the sweeper. The sweeper automatically uncouples the attenuator from the ALC system for all external leveling points. Note that in external leveling modes, the UNCPLD annunciator is lit. For example, leveling the output of a 30 dB gain amplifier to a level of leveled.

  • Page 41: Leveling With A Power Meter

    Leveling with a power meter is similar to leveling with a diode detector. 1. Set up the equipment as shown in Figure 2-3. Be sure to set the power meter to the correct manual range mode for the output power setting at which you are leveling.

  • Page 42

    Externally leveling the Sweeper leveling with a power meter The coupling factor is defined by the equation leveled power (P lev) - detected power (P det). Refer to Figure 2-1 for locations of After the coupling factor has been entered, the front panel knob P lev P det.

  • Page 43: Millimeter-wave Source Module Leveling

    Figure 2-4 and Figure 2-5 illustrate the setups for leveling with a mm-wave source module. Figure 2-4 illustrates the setup that is used with the HP 83751B and HP 83752B (high power models). No external amplifier is required to obtain maximum specified power.

  • Page 44: Millimeter-wave Source Module Leveling Using A Microwave Amplifier

    Externally leveling the Sweeper Figure 2-5 illustrates the setup that is used with the HP 83751A and HP 83752A (standard power models). An external amplifier is required to obtain maximum specified power. SOURCE MODULE I NSERFACE RF OUTPUT A D A P T E R...

  • Page 45

    Externally leveling the Sweeper To obtain flatness corrected power refer to “Creating User Flatness Correction Arrays, )) later in this manual. 2-11...

  • Page 46

    Generating a Stepped Sweep...

  • Page 47

    Generating a Stepped Sweep To generate a stepped sweep, perform the following steps: 1. Press (PRESET). 2. Select the desired (START_) and IsTopl frequencies. entering the desired number. Press m SWEEP MODE $ . 5. Press the @J key. The MARKER/SWEEP/STATUS display should read and the STEP annunciator should be lit.

  • Page 48

    Generating a Millimeter Signal...

  • Page 49

    Generating a Millimeter Signal If your sweeper was ordered with Option lEE, you have the capability of using HP 83550 series millimeter head source modules with the sweeper. The interface extender cable (HP part number 5062-7202) that is provided with all option 1EE sweepers allows the source module to be positioned in front of the sweeper.

  • Page 50

    Figure 4-l shows the equipment setup for using a millimeter head with your HP 83751B or HP 83752B. Figure 4- 1. 2. Turn the sweeper on, and press fjPRESET). 3. The sweeper automatically configures itself for source module operation when the @EE] key is pressed.

  • Page 51: High Power) Sweepers

    Generating a Millimeter Signal Using millimeter heads with “B” model (high power) sweepers ADAPTER MM-WAVE SOURCE MODULE Figure 4-l. Millimeter.wave Source Module leveling 4 - 4...

  • Page 52: Standard Power) Sweepers

    Figure 4-2 shows the equipment setup for using a millimeter head with your HP 83751A or HP 83752A. An external amplifier is required to obtain maximum specihed power. 1. Turn the sweeper line power off, connect the equipment as shown in Figure 4-1.

  • Page 53

    Generating a Millimeter Signal SOURCE MODULE INTERFACE RF OUTPUT A D A P T E R ( I F R E Q U I R E D ) M I C R O W A V E NTERFACE A M P L I F I E R S O U R C E M O D U L E OUTPUT...

  • Page 54

    Creating User Flatness Arrays...

  • Page 55

    Creating User Flatness Arrays This chapter explains how to create user flatness correction arrays, which calibrate the power level at a remote test port. Two examples are provided: The first example shows the basic setup and steps to create a user flatness array.

  • Page 56: Creating A User Flatness Array

    In this example an HP 437B power meter controlled by the sweeper through the interface bus (HP-IB) is used to enter the correction data into a flatness array. Figure 5-l shows a typical system setup. The setup shown assumes that if the setup has an external leveling configuration, that the steps necessary to correctly level have been taken.

  • Page 57

    5. Select [ml SPECIAL 112) (jj). Use the @j @J keys to select the type of power meter you will be using. (437B for this example.) 6. Select (SHIFT) SPECIAL 113) (w’. Enter the HP-IB address of the power meter you will be using for the calibration. (Thirteen is the default address for power meters.)

  • Page 58

    Enable the power meter/sensor cal factor array. For operating information on the HP 437B power meter refer to its operating and service manual. Connect the power sensor to the point where corrected power is desired. (See Figure 5- 1.) The MARKER/SWEEP/STATUS display should still read: Press (Hz/s/ENTEji) to start the calibration.

  • Page 60

    1. Connect equipment as shown in Figure 5-2. Do not connect the power sensor to the system yet. 2. Press (PRESET) on the scalar analyzer (HP 8757). 3. If a frequency range other than the full range of the instrument is desired, use the m and CsTopl keys on the sweeper to input the desired frequency range.

  • Page 61

    Creating User Flatness Arrays Creating a user flatness array for use in a scalar analysis measurement Attention! Do not proceed until the HP 8757 system interface is turned off by pressing @FiiZ]. Then by pressing softkeys, MORE, SWEZP on the analyzer.

  • Page 62

    Creating User Flatness Arrays b. Select the number of correction points, using the keypad for your entry. Valid entries range from 2 to 801, then press c. The MARKER/SWEEP/STATUS display should now read: Press to start the calibration. The display will show each correction point’s frequency and power as it is measured.

  • Page 63

    Operating a Master/Slave Setup...

  • Page 64

    Operating a Master/Slave Setup Two HP 83750 series sweepers can be configured for two-tone measurement capabilities. Two synchronously tracking sweepers can be configured as a “master/slave” pair for mixer characterization or inter-modulation distortion measurements. The swept frequency accuracy allows control of the sweepers at Exed- or swept-frequency offsets.

  • Page 65

    Operating a Master/Slave Setup “SLAVE” SYNTHESIZED SWEEPER Figure 6-l. Master/Slave Setup 6 - 3...

  • Page 66

    1. Press (jPRESETJ. 2. Activate the master mode by pressing [M) (SPECIAL) (19) C-1. If the display does read then press the m key once to set the control mode to master. 3. Set the desired frequencies by using the CSTARTY(STOP_) keys, the N O T E It is recommended that the master and slave sweepers frequencies not differ more than 5 GHz at any point in the sweep.

  • Page 67

    Operating a Master/Slave Setup To set up the master sweeper then pressing the @) key until the display reads: desired number of points. N O T E The master and slave sweepers must have identical sweep mode, number of points, and sweep time settings.

  • Page 68

    1. Press (PRESET). 2. Activate the slave mode by pressing (SHIFT) (EEiK] 119) (-1. Press the @) key until the display reads 3. Set the desired frequencies by using the (START)/0 keys, the N O T E It is recommended that the master and slave sweepers frequencies not differ more than 5 GHz at any point in the sweep.

  • Page 69

    For a pinout description of the source synchronization cable, see the “Multi-pin Connectors” section of Chapter 7, “Front/Rear Panel.”...

  • Page 71

    Front/Rear Panel This chapter contains detailed information on various aspects of the sweeper front and rear panel. Information on the following can be found in this chapter: Display Knob Line Power Switch Power Cables...

  • Page 72

    Figure 7-1. Sweeper Connectors - Front Panel 7 - 3...

  • Page 73: Sweeper Connectors - Rear Panel

    Front/Rear Panel Connectors Figure 7-2. Sweeper Connectors - Rear Panel 7 - 4...

  • Page 74

    Front/Rear Panel Connectors 10 MHz REF IN This rear panel female BNC connector accepts a -5 to + 10 within 510 ppm of 10 MHz or any sub-multiple down to 1 MHz. The nominal input impedance is 50 61. This connector detects when a valid reference signal is connected to it and automatically switches from internal to external reference operation.

  • Page 75

    TTL pulse at 1601 points evenly spaced across an analog sweep, or at each point in stepped sweep mode. When used with the HP 8757D scalar analyzers, the number of pulses per sweep (in analog sweep mode) is determined by the number of HP 8757 trace points.

  • Page 76

    Front/Rear Panel Connectors This rear panel female BNC connector supplies a positive rectangular pulse (approximately +5 V into 2 kfl) during the retrace and band switch of the RF output when the instrument is sweeping. This output also supplies a -5 V pulse when the RF output is coincident with a marker frequency.

  • Page 77: Auxiliary Interface Connector

    Front/Rear Panel Connectors AUXILIARY INTERFACE This connector provides special control signals used in master/slave interface operation with another source, and in other special-purpose applications. This connector is a 25-pin D-subminiature receptacle located on the rear panel. A U X I L I A R Y I N T E R F A C E SOURCE SYNCHRONIZATION CABLE...

  • Page 78

    Front/Rear Panel Connectors Table 7-1. Pin Description of the Auxiliary Interface Pin # Function Signal level Alternate Sweep Out Z-Axis Blanking/Markers B l a n k - +5 V M a r k e r - - 5 V Spare Rear Panel Control 3 low Stop Sweep G n d...

  • Page 79

    This connector allows the sweeper to be connected to other instruments or devices on the interface bus. Details of this cable are shown in Figure 7-4. table following the figure. H P - I E RL 1 Figure 7-4. HP-IB Connector and Cable HP-IB Interface Cables Available 7-10...

  • Page 80

    Front/Rear Panel Connectors As many as 14 HP-B instruments can be connected to the sweeper (15 total instruments in the system). The cables can be interconnected in a star pattern (one central instrument with the HP-lB cables emanating from that instrument like spokes on a wheel), or in a linear pattern (like boxcars on a train), or a combination of the two.

  • Page 81

    Front/Rear Panel Connectors The codes next to the HP-II3 connector, illustrated in Figure 7-4, describe the HP-IB electrical capabilities of the synthesizer, using IEEE Std. 488-1978 mnemonics (HP-IB, GP-IB, IEEE-488, and RX-625 are all electrically equivalent). Briefly, the mnemonics translate as follows: Source Handshake, complete capability.

  • Page 82

    This connector sends and receives digital and signals to and from an I N T E R F A C E (Option 1EE HP 83550Series millimeter-wave source module. With the source module Only) connected, the sweeper assumes the characteristics of the source module.

  • Page 83

    Front/Rear Panel Connectors MOD SENSE Source module sense. A 1 mA current is injected on this line by the millimeter source module to indicate its presence. This signal always equals 0 V. L MOD RF OFF Low = RF off. Source module RF is turned off. EXT LVL RET Source module external leveling return.

  • Page 84

    Tighten the barrel until Iirm contact is made. degraded in any way, high frequency losses can occur. Refer to application of Microwave note part 326, Coaxial Sz/stems - Principles Connector Care (HP number 5954- 1566) for more information. 7-15...

  • Page 85: Sweeper Display

    The sweeper front panel display contains two areas (Frequency, and Marker/Sweep/Status and Power) for displaying the current operating parameters of the sweeper. Front panel annunciators show the status of several of the sweeper functions and settings. M A R K E R / S W E E P / S T A T U S F R E Q U E N C Y D I S P L A Y P O W E R D I S P L A Y...

  • Page 86

    Front/Rear Panel Display The left-hand display is labelled FREQUENCY and is used exclusively to show information about frequencies being generated. (Information about markers is not pertinent to generated frequencies and is not displayed here.) In Start/Stop and CF/Span sweep modes, the left display has two separate fields of 11 characters each, whose contents depend on the instrument mode.

  • Page 87

    Front/Rear Panel Display The right-hand display is divided into two fields, although there is no physical separation between them. (Normally, one blank space is inserted between the left and right Eelds. When some features are accessed, however, all 24 characters of the right display can be used.) The left Eeld is labelled MARKER/SWEEP/STATUS, and is used to show a variety of information including marker frequencies, sweep time, and general instrument status.

  • Page 88: Sweeper Display And Led Annunciators

    Front/Rear Panel Display D I S P L A Y A N N U N C I A T O R S L E D A N N U N C I A T O R S Figure 7-7. Sweeper Display and LED Annunciators The front panel annunciators show the status of several of the sweeper functions and settings.

  • Page 89

    Front/Rear Panel Display The front panel LED annunciators (R, L, T, S, MKR A, Ml-+M2 SWP, UNLOCKED FM, and FLTNESS ON) will be lit to show you that an associated condition exists. An explanation of each annunciator follows. Display Annunciators SHIFT This annunciator appears when (ml is pressed, and goes off when any other key is pressed (or when m is...

  • Page 90

    Front/Rear Panel Display OFFSET This annunciator indicates that the displayed frequency is offset from the actual RF output frequency. This annunciator indicates that the sweeper has a new message that has not been displayed, such as an error message or instrument failure message. Messages are viewed by pressing the front panel CMsGl key.

  • Page 91

    Annunciators This LED annunciator is lit when the sweeper is in remote This LED annunciator is lit when the sweeper is receiving information or commands over HP-IB. This LED annunciator is lit when the sweeper is transmitting information over HP-IB.

  • Page 92

    The HP-IR switch on the rear panel is used to select the sweeper language and HP-II! address when you apply AC power. These parameters can also be selected via front panel operation. Refer to Figure 7-8 for a pictorial explanation of the various switch settings for the HP-IB address of the sweeper.

  • Page 93: Instrument Language Switch Settings

    Front/Rear Panel Figure 7-9. Instrument language Switch Settings T h r o u g h A n A C P o w e r C y c l e . T h r o u g h A n A C P o w e r C y c l e . Figure 7-l 0.

  • Page 94

    Front/Rear Panel HP-IB Lang/Address Switch “Instrument For information on setting the HP-IB address from the front State Keys” panel of the sweeper. For information on setting the language from the front panel Functions” of the sweeper. 7-25...

  • Page 95

    The front panel knob is used to increase or decrease parameter values. Pointers ( WV ) over a parameter or numeric value in the display indicate that the function is active and its value will be increased or decreased when knob is rotated.

  • Page 96

    I N S T R U M E N T S T A T E PRESET MODE II I I - - S H I F T / S T A N D B Y L I N E P O W E R S W I T C H Figure 7-l 1.

  • Page 97

    Front/Rear Panel line POWER Switch Before turning the sweeper on, make sure that it is grounded through W A R N I N G the protective conductor of the power cable to a mains power receptacle provided with protective earth contact. Any interruption of the protective grounding conductor inside or outside of the sweeper or disconnection of the protective earth terminal can result in personal injury.

  • Page 98

    The line power cable is supplied in one of several configurations, depending on the destination of the original shipment. Each instrument is equipped with a three-wire power cable. When connected to an appropriate AC power receptacle, this cable grounds the instrument chassis.

  • Page 99: Power Cable And Line (mains) Plug Part Numbers

    C A B L E P L U G C A B L E F O R U S E P L U G T Y P E * * D E S C R I P T I O N L E N G T H C O L O R I N C O U N T R Y...

  • Page 100

    Instrument State Keys...

  • Page 101

    Instrument State Keys I N S T R U M E I N S T R U M E N T S T A T E S H I F T L O C A L M S G Figure g-1. Instrument State Group Registers 1-9 can be used to store instrument states.

  • Page 102

    As an example, note that ADDRESS appears in blue text directly above the secondary function of the (LOCAL) key. Pressing CSHIFT) [LOCAL) will enable the HP-lE3 address viewing and selecting mode. the SHIFT annunciator will be canceled from the display and no action will be taken by the instrument.

  • Page 103

    Instrument. State Keys The (PRESET) key sets the sweeper to a known state (either the factory preset condition, or a user-defined preset condition). The factory preset conditions are shown in the following table. User-defined preset conditions are discussed later in this section, and factory preset conditions for special functions are described in Chapter 15, “Special Functions.

  • Page 104

    Instrument State Keys Associated SCPI Commands Returns the instrument to the preset Associated 8350 Commands Returns the instrument to the preset state. When this function is selected (by pressing [SHIFT) [WI), the current preset mode (factory or user) is shown in the right-hand display of the sweeper.

  • Page 105

    Preset. Saued. N O T E When the instrument is connected to an HP 87570 scalar network analyzer, its system interface must be temporarily turned OFF in order to save a user-defined preset instrument state. Refer to the HP 87570 Scalar Network Analyzer Operating Reference.

  • Page 106

    Instrument State Keys N O T E The saved user-defined preset cannot be recalled until User preset is selected using the PRESET MODE function, described earlier in this chapter. Associated SCPI Commands Saves the current instrument state SYSTem:PRESet:SAVE into the userdefined preset storage 8 - 7...

  • Page 107

    Instrument State Keys Pressing this key restores the state of the instrument from a register (l-9). When this key is pressed, the prompt message in the right-hand display is display shows and the instrument state is recalled from that register. Note that a units key (i.e. (j-1) does not need to be pushed.

  • Page 108

    Instrument State Keys If the special function consists of discrete states (i.e. On/Off or Int/Ext/None), then the @j ($J keys or the front panel knob must be used to select the desired state. If the special function is a numericaI value, then the keypad may also be used to enter the value.

  • Page 109

    2. If the power to the instrument is cycled or lost, the address entered from the front panel will survive if the rear panel HP-IB switch is set to 31; otherwise, after a power cycle or loss, the HP-IB address will default to the rear panel switch setting.

  • Page 110

    Instrument State Keys The m key causes the last message from the message queue to be M S G displayed in the MARKER/SWEEP/STATUS area of the display. When a new message appears in the message queue, the MSG annunciator is lit, and remains lit until this key is pressed.

  • Page 111

    Instrument State Keys Alternate sweep is turned off by selecting m ALT n again. N O T E If ALT SI.~.I~ is not the active parameter (with pointers above it), then the key sequence m 1Msc;l must be performed twice to turn off alternate sweep. N O T E If the attenuator setting in the selected register differs from the current setting, then the current setting is used and the...

  • Page 112

    Marker Keys...

  • Page 113

    Marker Keys Figure 9-1. The Markers Group There are ten markers: MO through M9. Any combination of these may be on at one time, and they may be set to a frequency anywhere in the instrument’s current frequency range. When the instrument is preset (factory mode), the values of all of the markers are set to the center frequency of the instrument’s frequency range.

  • Page 114

    Marker Keys snapped to the start or stop frequency (whichever is nearest) of the sweep and is adjusted from there. If a marker value is entered using the keypad, its value will remain as desired as long as the value is within the range of the current sweep. If the value entered falls outside of the range of the current sweep the marker’s value will be snapped to the start or stop frequency (whichever is nearest to the entered number).

  • Page 115

    Marker Keys Pressing the (mn) key allows a marker (MO-M9) to be selected and/or defined. When this key is pressed, the MARKER/SWEEP/STATUS display shows the status of the markers in the form where each digit (O-9) is replaced by a “-)) if that marker is off. When a digit (O-9) is then pressed on the Entry keyboard, the appropriate marker (MO through M9) becomes the active parameter displayed in the MARKER/SWEEP/STATUS area, with pointers over the frequency to indicate that the marker frequency can be...

  • Page 116

    Marker Keys Associated SCPI Commands Same as pressing the [MKR n] ker Enters fiequenq of marke/: Associated 8350 Commands Same as pressing [[MKR nJ kel Used to set marker 0. MA <num>[suffix] marker output format is displayed. The mode can be changed to the next MODE choice by pressing the @ @J keys, or by selecting (?FiiFi~ MKR again.

  • Page 117

    Marker Keys Associated SCPI Commands Associated 8350 Commands Selects marker amplitude mode. Selects marker intensky mode. 9 - 6...

  • Page 118

    Marker Keys This key turns off a marker only if it is displayed in the O F F MARKER/SWEEP/STATUS area as the active parameter. Note that the pointers must be over the frequency value. The instrument then returns to the same state as if (JCGG) had just been pressed, displaying the new status of which markers are on and off.

  • Page 119

    MARKER/SWEEP/STATUS area the MKR A LED annunciator is turned off and MARKer:MODE is set to FREQuency Associated SCPI Commands Same as pressing [[MKR A) Used to query over HP-B Associated 8350 Commands Sets marker A mode to on. 9 - 8...

  • Page 120

    Marker Keys When this key is pressed, the user can select which marker (O-9) is the Reference Marker. The marker number becomes the active parameter which is displayed in the MARKER/SWEEP/STATUS area. The A Reference Marker is turned on if Marker A Mode is turned on. The display is in the format Mk I- De 1 t, .

  • Page 121

    Modulation Keys...

  • Page 122

    Modulation Keys Figure 10-l. The Modulation Group AM and FM modulation is obtained by means of an external signal being applied to the rear-panel AM INPUT or FM INPUT BNC connectors. There are 2 FM modes: AC (locked) and DC (unlocked). N O T E In the DC (unlocked\ mode, frequency accuracy will he degraded as a result of the synthesizer being bypassed.

  • Page 123

    Modulation Keys Pulse modulation is either internal or external. Internal pulse modulation is either controlled by a built-in pulse generator, or preset to either a 1 kHz or a 27 kHz square wave. When external pulse is selected, the instrument is modulated by a signal present on the PULSE IN/OUT connector on the rear panel.

  • Page 124

    Modulation Keys Pressing the (PULSE MODE it to be changed if desired. When this key is pressed, the current Pulse Mode is shown in the MARKER/SWEEP/STATUS display. The mode can be changed to the next choice by pressing the PULSE MODE keys.

  • Page 125

    Modulation Keys (PULSE MODE fi] Associated SCPI Commands Sets tha pulse mode to internar! PULM:SOURce INTernal Sets the pulse mode to scalar. PULM:SOURce SCALar Sets the pulse mode to external PULM:SOURce EXTernal Sets the pulse mode to 1 kHz PULM:SOURce SQIK square wave.

  • Page 126

    Modulation Keys Pressing the AM MODE be changed if desired. When this key is pressed, the current AM mode is displayed in the MARKER/SWEEP/STATUS display. The mode can be changed to the next choice by pressing the MODE The AM mode choices are: AM Off In this mode, external AM modulation is disabled.

  • Page 127

    Modulation Keys Pressing the St) key displays the current FM mode and allows it to FM MODE be changed if desired. When this key is pressed the current FM mode is displayed in the MARKER/SWEEP/STATUS area. The mode can be changed to the next choice by pressing the (FMj’D key again, or by pressing the 0J (JJJ keys.

  • Page 128

    Frequency Keys...

  • Page 129

    Frequency Keys Figure 1 l-l. The Frequency Group All the frequency functions, with the exception of the multiplier setting (see entries must be terminated using one of the four frequency-unit keys (m, new value, autoranged to the appropriate units. For Start/Stop and CF/Span Sweep modes, the frequency values are shown on the left and right sides of the FREQUENCY display, in the format <digits>...

  • Page 130

    Frequency Keys All the frequency functions share a common step size (this includes the frequency of the markers). A step that would move a frequency beyond its legal range is not taken, allowing you to “retrace your steps” by stepping in the opposite direction.

  • Page 131

    Frequency Keys Pressing the (START] key puts the instrument into the swept frequency mode, and allows you to change the start frequency. This key puts the instrument into sweep mode, and displays the start and stop frequencies on the FREQUENCY display. The START and STOP annunciators are turned on when this key is pressed.

  • Page 132

    Frequency Keys Associated SCPI Commands Sets the frequency offset to the FREQuency:OFFSet <mm> desired value. Turns the frequency offset on. FREQuency:OFFSet:STATe ON FREQuency:OFFSet:STATe OFF Associated 8350 Commands Sets the kequency offset to the SHFB <num>[suffix] desired value. 1 1 - 5...

  • Page 133

    Frequency Keys Pressing the (STOP) key puts the instrument into the swept frequency mode, and allows you to change the stop frequency. This key puts the instrument into sweep mode, and displays the start and stop frequencies on the FREQUENCY display. The START and STOP annunciators are turned on.

  • Page 134

    Frequency Keys Selecting this function (by pressing cm) (STOP_)) makes the frequency multiplier the active parameter displayed in the MARKER/SWEEP/STATUS MULT area. If the multiplier is not 1, the annunciator is turned on. The values of frequency shown in the FREQUENCY display are in accordance with the equation: DisplayedFrequency= (ActualRFFrequency * Multiplier) + Offset The multiplier value is displayed in the format...

  • Page 135

    Frequency Keys Pressing the m key puts the instrument into the swept frequency mode, and allows you to change the center frequency of the sweep. This key puts the instrument into sweep mode and displays the center frequency and frequency span in the FREQUENCY display. The CF and SPAN Annunciators are turned on.

  • Page 136

    Frequency Keys Pressing the (SPAN) key puts the instrument into the sweep mode and allows the span of the sweep to be changed. This key puts the instrument into sweep mode and displays the center frequency and frequency span in the FREQUENCY display. The CF and SPAN annunciators are turned on.

  • Page 137

    Frequency Keys Pressing the a key sets the instrument to CW (continuous wave) mode and allows the CW frequency to be changed. This key turns the sweep mode off, and displays the CW frequency in the FREQUENCY display. (The right half of the FREQUENCY display is blanked.) The CW Annunciator is turned on.

  • Page 138

    Frequency Keys turned on, and the 0 to 10 V ramp is available at the SWEEP OUT BNC connectors on the front and rear panels. This mode allows power sweep and power slope in CW mode. Associated SCPI Commands Sets the instrument to sweep mode. Turns CW/CFcooplng an or OK Sets CWto the desired fiequenq Sets swept L’W to desired fiequenq...

  • Page 139

    Frequency Keys Pressing the key turns markers Ml and M2 on, and sweeps between the two markers. This function toggles marker sweep mode on and off. If marker sweep mode is off when this key is pressed, the mode is turned on and the LED annunciator is turned on.

  • Page 140

    Frequency Keys Associated 8350 Commands Turns marker sweep off This function copies the values of the markers Ml and M2 to the START and STOP frequencies respectively. The new frequencies are then shown in the FREQUENCY displays. Markers Ml and M2 are turned oli if they were previously off.

  • Page 141

    Sweep Keys...

  • Page 142: The Sweep Group

    Sweep Keys Figure 12-l. The Sweep Group There are two sweep modes: analog (or ramp) and stepped. In analog sweep mode, the duration of the forward-going portion of the sweep is controlled and displayed. In stepped sweep mode, the dwell time per point is controlled and displayed.

  • Page 143

    Sweep Keys N O T E SWEEP annunciator is on all the time during fast sweeps and cycles on and off for slower sweeps, however it is not necessarily an accurate indicator of when the instrument is actually in a forward sweep.

  • Page 144

    Sweep Keys Pressing the (TIME) key displays the sweep time and allows it to be changed. If this key is pressed when analog sweep mode is on, the time for the .forward portion of the sweep becomes the active parameter, and is shown in the MARKER/SWEEP/STATUS display.

  • Page 145

    Sweep Keys Associated SCPI Commands SWEep:MODE AUTO sweep offl. SWEep:TIME:AUTO to the minlinum value. Sweep time is bft at current setting SWEep:TIME:AUTO Sets the dwell time to the desired value. Sets the sweep tline to the desired SWEep:TIME <num>[suffixl value. Associated 8350 Commands Sets the sweep time to the desired ST <num>[suffixl...

  • Page 146

    Sweep Keys Associated SCPI Commands Sets the instrument to manual SWEep:MODE MANual sweep mode. Sets the manual Irequenq to the FREQuency:MANual <num>[suffix] desired value. Used for power sweep. Associated 8350 Commands Sets the instrument to manual SM <num>[suffix] sweep. 1 2 - 6...

  • Page 147

    External Trigger mode will not work if Step Sweep External Trigger mode is selected. Single Trigger In this mode the sweep is initiated when the user presses or by the HP-lB bus. The displayed message is Associated SCPI Commands Sets the trbger mode to continuous.

  • Page 148

    Sweep Keys Associated 8350 Commands Sets trbger mode to continuous, Sets trbger mode to external Sets trbger mode to singb. SWEEP MODE current sweep mode is displayed in the MARKER/SWEEP/STATUS display area. The mode can be changed to the next choice by pressing the [SHIFT_) (TRIG MODE manual sweep overrides this selection.

  • Page 149

    Sweep Keys Associated SCPI Commands Sets the sweep made to analog. SWEep:GENeration ANALog Sets the sweep mode to stepped. SWEep:GENeration STEPped Sets the instrument to internal& last tr&geL Sets the sweep mode to stepped. SWEep:GENeration STEPped Sets the instrument to externally 1 2 - 9...

  • Page 150

    Sweep Keys Pressing the key triggers a single sweep in the instrument. If SINGLE TRIG the trigger mode was not previously set to single trigger, pressing this key will automatically set the trigger mode to single. This function (selected by pressing sets the SINGLE TRIG...

  • Page 151

    Power Keys...

  • Page 152: The Power Group

    Power Keys Figure 13-l. The Power Group The power functions are displayed in the right-hand display, either in the MARKER/SWEEP/STATUS area or in the POWER area, as described for each function. Units are not autoranged, and are given below for each function. 13-2...

  • Page 153

    Power Keys P O W E R L E V E L Pressing this key displays the current power level and allows it to be This function makes the power level the active parameter displayed in the POWER area. The units are dBm. If power sweep mode is engaged, the power at the start of the sweep is displayed.

  • Page 154

    Power Keys L E V E L Resolution is 0.1 dB. The power offset function citn be turned off by selecting Associated SCPI Commands Sets the power offset to the desired POWer:OFFSet Qmm>[DB1 value. 1 3 - 4...

  • Page 155

    Power Keys Pressing the key displays the power sweep value and allows POWER SWEEP it to be changed. This function controls the change in RF power as the instrument sweeps, with units of dB/Sweep. If this key is pressed when power sweep mode is off, or when another parameter is displayed in the MARKER/SWEEP/STATUS area, then power sweep becomes the active parameter, and the PWR SWP annunciator is turned on.

  • Page 156

    Power Keys (SHIFT) @OWER controls the SWEEP power slope, which is the change in power per unit frequency. This function is used to increase the RF power by a constant dEl amount per unit RF frequency in GHz, to compensate for the power loss of an external device or cable.

  • Page 157

    Power Keys ( A L C M O D E n) Pressing the ALC MODE When this key is pressed the current ALC mode is displayed in the MARKER/SWEEP/STATUS area. The mode can be changed to the next choice by pressing the key again, or by pressing the a QJ keys. The ALC mode choices are: Internal The ALC point is inside the source.

  • Page 158

    Power Keys ( A L C M O D E fi) front panel. To obtain calibrated leveled power, the EXT CAL adjustment should be made. (See EXT CAL .) The EXT ALC LED is turned on. The displayed message is: Source Module The ALC point is inside an external source module Leveling...

  • Page 159

    Power Keys (ALC MODE Ir> the RF output power in external (diode and power meter) leveling modes external detector. This coupling factor can be adjusted to make the nominal RF output power agree with the POWER display. This function affects only the RF output power, by offsetting the ALC reference voltage;...

  • Page 160

    Power Keys This function toggles the user flatness correction on and off. The flatness correction and the FLTNESS ON LED annunciator are alternately turned on and off each time the key is pressed. Associated SCPI Commands Selecting this function (by pressing initiates a calibration sequence which calibrates the power level at a remote test port, using an external power meter.

  • Page 161

    Entry Keys...

  • Page 162: The Entry Group

    Entry Keys Figure 14-1. The Entry Group 1 4 - 2...

  • Page 163

    1, 2, 5 Sequence Frequency Offset Frequency Step Size Slope Fixed 0.1 dB/GHz HP-IB Address Fixed Span Fixed 1, 2, 5 Sequence M a n u a l S w e e p F r e q Settable Frequency Step Size...

  • Page 164

    Entry Keys When this key is pressed, the value of the frequency or power step size becomes the active parameter and is shown in the MARKER/SWEEP/STATUS display. Frequency or power is displayed depending on whether a key in the FREQUENCY or the POWER area was last pressed. If the active parameter is not a frequency or power parameter, the display will read: S i z e * * .

  • Page 165

    Entry Keys Number Pad Keys The number pad comprises the digit keys @J through @, the decimal point the backspace key removes the last character in the string. The negative sign, when legal, toggles the sign of the number being entered. N O T E When numeric keys are pressed, the display shows the new value of the active parameter as it is being entered, however the units are not displayed, and the actual parameter value is not updated...

  • Page 166

    Entry Keys The unit keys serve as terminators for active parameter values being entered from the keypad. They consist of LGHz) (also used for dE!m and dl3), CMHz) (also used for ps), IkHz) (also used for ms), and C-1 (used for Hz, V, s, and unitless values).

  • Page 167

    Entry Keys Pressing this key toggles the RF output state. If the output is off, the RF OFF annunciator in the right-hand display is turned on. Associated SCPI Commands Turns RF on. POWer:STATe ON Turns RF off POWer:STATe OFF Associated 8350 Commands 1 4 - 7...

  • Page 168

    Entry Keys These functions (selected by pressing the (SHIFT) key, and then the m or @j key) are only used for certain service related procedures. They are not used during normal front panel operation. 14-8...

  • Page 169

    Entry Keys ENTRY OFF When this function is selected (by pressing (SHIFT) (HZ/~/ENTER)) the active parameter is de-activated, and the MARKER/SWEEP/STATUS display is blanked. All keys in the Entry area are disabled (except for [TON/OFF)), including the numeric pad, the f$J @ [sTEPI keys, and the front panel knob.

  • Page 170

    Entry Keys When this function is selected (by pressing CsHlFTl [RF)) the instrument initiates a peaking algorithm which automatically aligns the YIG tracking filter at a series of frequencies over its entire range to optimize RF output power. This procedure is also called autotracking. Before performing autotracking, make sure the RF OUTPUT is either connected in a 50 Q system, or has a load on it, such as a power sensor or attenuator.

  • Page 171

    Special Functions...

  • Page 173

    Special Functions by using the keypad to enter the number of the desired function and then pressing ENTER Once the key has been pressed, the selected special function becomes the active parameter in the MARKER/SWEEP/STATUS display. If the special function’s selections consist of discrete states (i.e. On/Off or select the desired state.

  • Page 174

    Special Functions Table 15.1. Special Functions for the HP 83750 Series Sweepers Special Function Display Factory Preset Description Function (After pressing Value Condition Number On/Off C W P E A K N G ” S W P T I M E A U T O...

  • Page 175

    Refer to the chapter entitled “front/Rear Panel” in this manual for switch setting information. ##These special functions provide access to the service related function menus and are documented in the HP 83751AB and HP 8375ZAB Synrhes&d Sweepers Sewi&? Guide. These areas are intended only for use by service personnel.

  • Page 176

    Special Functions This special function sets the CWKF coupling to either on or off. When this switch is on, the CW function is coupled to the center frequency, and any change made to the center frequency is also made to CW. However, if CW is changed, the switch is automatically toggled off, and no change is made to the center frequency.

  • Page 177: Cw Peakng

    Special Functions 2 - CW PEAKNG This function causes a one-time execution of the peaking function when the sweeper is in CW or manual sweep mode. It aligns the output lilter so that its CW peaking is used to obtain the maximum available power and spectral purity, and the best pulse and FM envelopes at a given frequency.

  • Page 178

    Special Functions for a chosen span and meet all specihcations. The sweep tune is limited by a 400 MHz/ms sweep rate. When sweep time auto is “on,“the fastest sweep tune allowed for the frequency span swept is automatically selected. When sweep tune auto is “off,”...

  • Page 179

    Special Functions 4 -STEP SWPTIME This function is used to set the sweep time while in stepped sweep mode. The stepped sweep time can only be changed while the sweeper is in stepped sweep mode. The front panel m key which is normally used to set sweep time while in analog sweep mode, will display the dwell time if pressed while in stepped sweep mode.

  • Page 180

    Special Functions lower limit refers to the fastest sweep rate that the instrument will sweep. Performing a preset removes the limit and allows the instrument to sweep at the fastest possible rate. 15-10...

  • Page 181

    Special Functions 6 -ATT COUPLING This function allows you to set the RF attenuator coupling switch. When the switch is on, internal algorithms select the proper attenuator setting for optimum ALC performance. When the attenuator coupling is turned off, the attenuator setting is set to the whatever the current value is and left there.

  • Page 182

    Special Functions This function sets the output attenuation level. Note that when setting the attenuator level to 10 dB, the output power will be decreased by 10 dB. Setting a specked attenuation turns the RF attenuator coupling switch off. N O T E This function is visible with all instruments, but only active in instruments with Option 1El.

  • Page 183

    Special Functions 8 - R O S C A U T O This function sets the automatic reference oscillator selection switch. When this switch is on, the instrument automatically selects the frequency standard to be used. When the selection switch is on, the instrument will automatically select an external standard if one is connected to the rear panel 10 MHz REF IN connector.

  • Page 184

    Special Functions This function allows you to set the frequency standard to be used by the sweeper. When this function is used to select the frequency standard, the automatic reference selection switch will be turned off. The three frequency standard selections are: Sets the sweeper to use its internal frequency standard as its reference.

  • Page 185

    Special Functions 10 - V/GHz SCALE This function allows you to scale the V/GHz voltage at the rear panel values for this function is -10.00 V/GHz to + 10.00 V/GHz, with 0.50 V/GHz being the factory preset value. The rear panel output is limited to a & 12 V range.

  • Page 186

    Special Functions This function allows you to offset the VOLTS/GHZ OUTPUT on the rear panel. The acceptable range of values for this function is - 10 to + 10 V, with the factory preset value being 0.00 V. The rear panel output is limited to a k12 V range.

  • Page 187

    1 2 - P W R M E T E R T Y This function allows you to select the type of power meter that the sweeper can control via HP-IB to calibrate user flatness. The choices are: N O T E The default power meter selection from the factory is 4378.

  • Page 188

    Special Functions This function allows you to set the power meter HP-E! address to the desired setting. The range of acceptable values is from 0 to 30. N O T E The value set at the factory is 13. If you change this value, it will not be altered, or reset to 13, by presetting or cycling the line power on the instrument.

  • Page 189

    Special Functions 14 - FM SENSITIVITY This function allows you to choose the FM sensitivity of your instrument: either -6 MHz/V or -20 MHz/V. The factory preset default value is N O T E The FM sensitivity will change from the nominal -6 or -20 MHz/V when a millimeter source module is connected to the sweeper.

  • Page 190

    Your language selection may or may not be retained if line power to the instrument is lost, depending upon the rear-panel language selection switch. For information on setting the rear panel switch refer to the “HP-I!3 Switch” section of Chapter 7 in this manual, refer to the for more detailed instructions on setting this switch.

  • Page 191

    Special Functions 16 - FW REVISION This function allows you to view the revision number of the Ermware that is installed in your instrument. Associated SCPI Commands Queries the instrument for model *IDN? number, serial number and firmware revision. 15-21...

  • Page 192

    SWEEP and CW, are blanked. This function cannot be executed when the instrument is connected to an HP 8757 or when the instrument is speaking 8350 compatibility language. If you attempt to do so, nothing happens except an error message is displayed.

  • Page 193

    Special Functions 17 - *SECURITY 401 CLEAR This function lets you clear and initialize the entire content of RAM times that memory is cleared and the RAMS are set to zeros is set by 482 C:LRMEM IXilJHT. After the RAMS are cleared, the instrument is set to preset conditions.

  • Page 194

    Special Functions 17 -*SECURITY 402 CLRMEM This function lets you set the number of times that the RAMS will be cleared When you press @FiiF) SPECIAL @ [Hz/s/ENTER_), the following message is displayed: C It-Mem Courtt.= 1. The 0) (7JJ keys or the front panel knob let you change the count.

  • Page 195

    Special Functions 17 . *SECURITY 404 BLANK This function allows you to turn the display off. DISPLY When you press (SHIFT) SPECIAL @ & , the following message E N T E R is displayed: 13 i sp 1.~4 i 5 OH. The a ($J keys or the front panel knob let you toggle from a normal display to a blanked display.

  • Page 196

    Special Functions This function allows you to select whether the decimal point appears as a period, or as a comma. Associated SCPI Commands None. 15-26...

  • Page 197

    Special Functions 1 9 - C O N T R O L M O D E This function allows you to set your sweeper to either the master or slave state. For more information on master/slave operation, refer to Chapter 6, “Operating a Master/Slave Setup.

  • Page 198

    Special Functions This function displays the results of the last time the self-test was run, or displays the test has not been run since the last time power was turned on. Pressing the key will activate the self-test. All external cables ENTER must be disconnected prior to running the self-test.

  • Page 199

    Error Messages...

  • Page 200

    If an error condition occurs in the sweeper, it will always be reported to both the front panel and HP-IB error queues. These two queues are viewed and managed separately. The m key is used to view the contents of the front panel error queue.

  • Page 201: The Error/event Queue

    As errors and events are detected, they are placed in a queue. This queue is Erst in, Erst out. If the queue overhows, the last error/event in the queue is replaced with error -350 "Queue overflow" Any time the queue overflows, the least recent errors remain in the queue, and the most recent error/event is discarded.

  • Page 202

    The system-deiined error/event numbers are chosen on an enumerated description> portions of the ERRor query response are listed here. The first error/event described in each class (for example, -100, -200, -300, -400) is a “generic” error. In selecting the proper Error/event number to report, more specific error/event codes are preferred, and the generic error/event is used only if the others are inappropriate.

  • Page 203: Error Numbers

    Out of Range” is the error message. When the LMSG) key is pressed, the error message is displayed in the leftmost display. The entire message is returned by the HP-IB query “SYSTem:ERRor?“. The error message contains the following parts: SCPI Error Number - The standard SCPI error number (-222 in the example) usually differs from the manual error number because the manual error number is unique for every possible message.

  • Page 204

    Error Messages Error Messages list Action Required - The text that appears below each error message listing contains corrective actions that should be followed in order to correct the error condition. Note that the action required is never shown in the sweeper display. 16-6...

  • Page 205: Command Error

    An <error/event number> in the range [ -199, -100 ] indicates that an IEEE 488.2 syntax error has been detected by the instrument’s parser. The occurrence of any error in this class shah cause the command error bit (bit 5) in the event status register (IEEE 488.2, section 11.5.1) to be set.

  • Page 206

    “GET not ahowed” A Group Execute Trigger was received within a program message. (See IEEE 488.2, 7.7). Correct the HP-II3 controller program so that the group execute trigger does not occur within a line of HP-IB program code. -108 “Parameter not ahowed”...

  • Page 207

    Error Messages -109 “Missing parameter” Fewer parameters were received than required for the header; for example, the *EMC common command requires one parameter, so receiving *EMC is not ahowed. -110 “Command header error)” An error was detected in the header. This error message should be used when the device cannot detect the more specific errors described for errors - 111 through - 119.

  • Page 208

    Error Messages “Exponent large” The magnitude of the exponent was larger than 32000. (See IEEE 488.2, 7.7.2.4.1). -124 “Too many digits” The mantissa of a decimal numeric data element contained more than 255 digits excluding leading zeros. (See IEEE 488.2, 7.7.2.4.1).

  • Page 209

    Error Messages -144 “Character data too long” The character data element contains more than twelve characters. (See IEEE 488.2, 7.7.1.4). “Character data not allowed” A legal character data element was encountered where prohibited by the device. -150 “String data error” This error, as well as errors -151 through -159, are generated when parsing a string data element.

  • Page 210

    Error Messages “Expression error” -170 This error, as welI as errors -171 through -179, are generated when parsing an expression data element. This particular error message should be used if the device cannot detect a more specific error. -171 “Invalid expression” The expression data element was invalid.

  • Page 211: Execution Error

    Error Messages An <error/event number> in the range [ -299, -200 ] indicates that an error has been detected by the instrument’s execution control block. The occurrence of any error in this class shall cause the execution error bit (bit 4) in the event status register (IEEE 488.2, section 1 l.S.

  • Page 212

    Error Messages Error Error Description [description/explanation/examples] Number “Execution error” -200 This is the generic syntax error for devices that cannot detect more defined in IEEE 488.2, 11.5.1.1.5 has occurred. -201 “Invalid while in local” Indicates that a command is not executable while the device is in local due to a hard local control.

  • Page 213

    Error Messages -214 “Trigger deadlock” Indicates that the trigger source for the initiation of a measurement is set to GET and subsequent measurement query is received. The measurement cannot be started until a GET is received, but the GET would cause an INTERRUPTED error. -215 “Arm deadlock”...

  • Page 214

    Error Messages -226 Lists not same length. Attempted to use LIST structure having individual LIST’s of unequal lengths. -230 Data corrupt or stale Possibly invalid data; new reading started but not completed since last access. -231 Data questionable Indicates that measurement accuracy is suspect. -240 Hardware error Indicates that a legal program command or query could not be...

  • Page 215

    Error Messages -261 Math error in expression Indicates that a syntactically legal expression program data element could not be executed due to a math error; for example, a divide-by-zero was attempted. The definition of math error is -270 Macro error Indicates that a macro-related execution error occurred.

  • Page 216

    Error Messages -276 Macro recursion error Indicates that a syntactically legal macro program data sequence could not be executed because the device found it to be recursive. (See IEEE 488.2, 10.7.6.6). -277 Macro redefinition not allowed Indicates that a syntactically legal macro label in the *DMC command could not be executed because the macro label was already dehned.

  • Page 217: Device-specific Error

    Error Messages An <error/event number> in the range [ -399, -300 ] or [ 1, 32767 ] indicates that the instrument has detected an error which is not a command error, a query error, or an execution error; some device operations did not properly complete, possibly due to an abnormal hardware or hrmware condition.

  • Page 218

    Error Messages Error Error Description [description/explanation/examples] Number Device-specific error -300 This is the generic device dependent error for devices that cannot detect more speciEc errors. This code indicates only that a Device-Dependent Error as deEned in IEEE 488.2, 11.5.1.1.6 has occurred.

  • Page 219: Query Error

    Error Messages An <error/event number> in the range [ -499, -4001 indicates that the output queue control of the instrument has detected a problem with the message exchange protocol described in IEEE 488.2, chapter 6. The occurrence of any error in this class shah cause the query error bit (bit 2) in the event status register (IEEE 488.2, section 11.5.1) to be set.

  • Page 220

    Error Messages Error Error Description [description/explanation/examples] Number -400 Query error This is the generic query error for devices that cannot detect more specific errors. This code indicates only that a Query Error as -410 Query INTERRUPTED Indicates that a condition causing an INTERRUPTED Query error occurred.

  • Page 221

    Error Messages For a specific calibration array, the HP-LB controller has sent more array elements than needed by the array deEnition. For a speciEc calibration array, the HP-II3 controller has sent an incorrect number of array elements than needed by the array...

  • Page 222

    -310, “System error;Command Send Error-No HP-IB Devices Indicates that during a Flatness Calibration, the instrument was sending a command to an HP-IB device, but could not End it. Flatness Calibration is aborted. -310, “System error-Cannot Find Power Meter On HP-IB Bus(205)”...

  • Page 223

    Marker Allowed(301)” Indicates that one of the commands “Cl”, “C2”, “C3”, or “C4” were detected while the instrument was using the HP 8350 compatible language. These commands are accepted but no action is taken because the instrument does not have this feature.

  • Page 224

    -178, “Expression data not allowedSHM2, SHM3: No Counter Indicates that the commands “SHMB” or “SHM3” were detected while the instrument was using the HP 8350 compatible language. These commands are accepted but no action is taken because the instrument does not have this feature.

  • Page 225

    Error Messages Indicates that the command “SHSS” was detected while the instrument was using the HP 8350 compatible language. These commands are accepted but no action is taken because the instrument does not have this feature. -178, “Expression data not allowed;SX: No External Sweep Indicates that the command “SX”...

  • Page 226

    Error Messages -300, “Device speciiic error;Test Patch l%ble Overtlow(401)” Indicates that a Self-Test Patch was requested for storage in EEPROM Patch Table, but the table already has the maximum allowed (50). -300, “Device specific error;Illegal Test Patch Name(402)” Indicates that an illegal Self-Test Patch <name> has been acquired to set a Self-Test Patch in EEPROM.

  • Page 227

    Error Messages -330, “Self-test failed;Self Test Patch Table Locked(406)” Indicates that segment 7 of the CPU board DIP switch is closed, prohibiting modiEcation of the test patch table. Switch 7 must be in the open position to allow modification. -330, “Self-test failed;Instrument Bus Error Occurred(407)” As part of the power on process, the cpu attempts to write and read a special latch on the A5 timer board to verify the integrity of the instruments data and address bus.

  • Page 228

    Error Messages Indicates that after the instrument is up and running, a series of power on self-tests have been run and error correction code checking has found that FLASH ROM has a high byte error. -330, “Self-test failed;Boot-ROM Checksum Error (LOW of power on self-tests have been run and error correction code checking has found that Boot-ROM has a low byte error.

  • Page 229

    Error Messages -330, “Self-test failed;Power Up Calibration Defaulted(421)” Indicates that after the instrument is up and running, a series of power on self-tests have been run and error correction code checking has found that contents of one of the calibration arrays were found corrupted.

  • Page 230

    Error Messages -300, “Device specific error;V/GHz DAC Out Of Range(501)” 11, “Trigger ignored;Trigger Immediate Ignored(502)” -211, “Trigger ignored;Sweep Trigger Immediate Ignored(503)” -213, “Init ignored;Init Immediate Ignored(504)” “Trigger ignored;Group Execute Trigger or *TRG -211, “Memory Error;Not Able to Recall From EEPROM: Default -311, More that a single bit error has been detected when recovering calibration data from EEPROM.

  • Page 231

    Error Messages “Warning! Learn String FW Revision Not Matched(606)” The learn string that was received does not match the current firmware revision. It was rejected and not used. -200, “Execution error;Execution Not Allowed. Currently In Restricted Mode(607)” The instrument is in a restricted mode due to either the operation of self test, or current operation of a calibration.

  • Page 232

    Error Messages -300, “Device specific error;No Sufficiently Wide Pass Band Was No sufficiently wide YTF pass band was found in the initial phase of the peaking algorithm. -300, “Device specific error;The fine-peak phase of the peaking algorithm failed(705)” For unspecified reasons the later “tie peak” phase of the peaking algorithm failed.

  • Page 233

    Error Messages -300, “Calibration Array Elements Sent In Descending A calibration correction flatness array was sent in descending order. The new array is rejected at the point of the descending element, X, which causes the array to be out of order. The previous elements, up to element X, are being written over by the new elements and cannot be restored.

  • Page 234

    Error Messages -221, “Setting conflict;FNCW: Instrument Not In CW Mode(901)” -300, “Device specific error;Need Same Attenuator Settings In Alt Sweep Mode(902)” When using the Alternate Sweep feature, the attenuator settings must be the same. This prevents the attenuator from being continuously switched between two different attenuation values.

  • Page 235

    Specifications and Options...

  • Page 236

    Specifications and Options This chapter contains listings of the sweeper performance spectications and the mechanical, electrical, warranty and documentation options that are available for the HP 83750 series sweepers. 17-2...

  • Page 237

    Specifications describe the instrument’s warranted performance over the 0 OC to 55 “C temperature range unless otherwise noted. Specifications apply after the peak function has been performed. (Refer to “PEAK II in Chapter 14 for information on performing the peak function.) Supplemental characteristics (indicated by italics) are intended to provide information useful in applying the instrument, but are not warranted parameters.

  • Page 238

    HP 83751A/B: 2 GHz to 20 GHz HP 83752A/B: 10 MHz to 20 GHz Standard 10 MHz timebase: f10 ppm High stability timebase (Option lE5): Accuracy = Calibration &Aging rate &Temperature effects *Line voltage effects Aging rate: 5 x lo-“/day, 1 x 10e7/yea.r With temperature: I x 10-‘“/oC...

  • Page 239

    Specifications and Options Frequency Resolution: Settable 1 Hz, Display 1 kHz Accuracy: See timebase specZcations Minimum step size: Number of points: 2 to 1601 Switching time/‘int: 7 ms + 8 ms/GHz step (Up to 50 ms switching time can occur when crossing the 2 GHz bandswitch point.) Dwell time/point: 1 ms to 50 s Resolution: 1 kHz Accuracy...

  • Page 240

    Specifications and Options Frequency F r e q u e n c y Figure 17-1. Typical Swept Frequency Accuracy (100 ms sweep, ramp mode) 1 7 - 6...

  • Page 241: Typical Maximum Available Power

    HP 8375141: + 10 dBm HP 83752A: + 10 dBm HP 83751B: + 17 dBm HP 83752B: < 2 GHz, + 16 dBm; 2 2 GHz, + 17 dBm With Option 1El (step attenuator): reduce by 1 dB 2 0 . 5 F r e q u e n c y Figure 17-2.

  • Page 242

    Specifications and Options RF Output HP 83751A and HP 83752A: -15 dBm With Option 1El: -85 dBm HP 83751B and HP 83752B: - 10 dBm With Option 1El: -80 dBm Settable: 0.01 dB Display: 0.1 dB Specifications apply for coupled attenuator mode (Option 1El) and ALC level...

  • Page 243

    (sweep speed and modulation mode dependent): 10 or 100 n o m i n a l External mm-wave module: HP 83550 series compatible with Option 1EE Number of points: 2 to 801 points/table Number of tables: up to 9...

  • Page 244

    Specifications and Options RF output 1 7 - 1 0...

  • Page 246

    Specifications and Options Spectral Purity Single-Sideband Phase Noise - 5 0 - 7 0 - 9 0 - 1 3 0 - 1 5 0 O f f s e t F r o m C a r r i e r Figure 17.3.

  • Page 247

    Sensitivity: 1 dB/V Bandwidth (3 dB): > 100 kHz, usable to 1 MHz Depth for HP 8375X& 20 dB; (+ 10 dBm to -10 dBm) Depth for HP 8375XB: 22 dB; (i- 17 dBm to -5 dBm) Input impedance: 3.5 kohms...

  • Page 248

    Specifications and Options Modulation Rates: Maximum deviation: same as unlocked mode up to 25 times the rate Maximum deviation: DC to 100 Hz rates: f75 MHz 100 Hz to 1 MHz rates: f 7 MHz 1 MHz to 2 MHz rates: f5 MHz 2 MHz to 10 MHz rates: f 1 MHz Sensitivity: MHz/V...

  • Page 249

    HP 83751 and HP 83752 sweepers are compatible with HP 8757 scalar analyzers, and HP 8970B noise figure meters. HP 83751 and HP 83752 sweepers are fully compatible with the Standard Commands for Programmable Instruments (SCPI) language. SCPI complies with IEEE 488.2-1987. HP 8350 mnemonics have also been implemented to provide compatibility with ATE systems which include an HP 8350B sweeper.

  • Page 250

    Specifications and Options General Operating temperature range: 0 to 55 “C Type tested to the environmental requirements of: MLT-28800E Class EMC: Conducted and radiated interference comply with: IEC 801-2/1991 4 kV CD, 8 kV AD IEC 801-4/1988 500 V Operation: Requires 30 minutes warm-up time from cold start at 0 to 55 stable ambient temperatures.

  • Page 251

    Specifications and Options General 90-132 VAC (47-66 Hz), 103.5-126.5 VAC (380-420 Hz), or 198-250 VAC (47-66 Hz); 400 VA maximum (standby 100 VA). Optimum voltage range automatically selected. If this instrument is to be energized via an external autotransformer for voltage reduction, make sure that its common terminal is connected to a neutral (earthed pole) of the power supply.

  • Page 252

    Specifications and Options General Net: 16 kg (35 lb) Shipping: 23 kg (49 lb) 17-18...

  • Page 253

    There are several options available for the sweeper. They are explained in the following sections. There are Eve electrical options available for the sweeper. These options are as follows: O p t i o n 1El A d d O u t p u t If Option 1El is ordered, an internal step attenuator is included before the Step Attenuator RF OUTPUT connector.

  • Page 254

    Hewlett-Packard office using the part numbers included in each of the following descriptions. Option ICM Rack Mount Ordering Option ICM adds a rack mount kit without handles. The HP part Kit without Handles number for the rack mount kit without handles is 5062-3977.

  • Page 255

    This option extends the benefits of factory warranty to provide a total of Return to HP Repair years of customer return repair service. Service Option W52 - Five Year This option provides Eve years of HP calibration service at HP customer Return-to-HP Calibration service centers. Service Option W54 - Five Year...

  • Page 256

    Programming Guide (HP part number 83750-90005) and the HP and HP 83752MB Synthesized Sweepers Installation and Quick Start Guide (HP part number 83750-90006). HP 83751MB and Option 083 - Service If Option OB3 is ordered, the shipment includes the...

  • Page 257

    Safety and Regulatory Information...

  • Page 258

    Safety and Regulatory Information This chapter includes required regulatory and safety information that is not included elsewhere in the manual. The Erst part of this chapter includes regulations and licensing information including the Manufacturer’s Declaration of Conformity. The second part of the chapter contains required safety information that is not included elsewhere in the manual.

  • Page 259

    am Arbeitsplatz (operator position) 18-3...

  • Page 260

    IEC Sol-3(1984), 3 V/m (27-500 MHz) IEC 801-4(1988), 500 V signal, 1000 V AC Supplementary Information: The HP 83751A was qualified as part of a product family which includes the HP 83751B, HP 83752A, and HP 83752B. Santa Rosa, California...

  • Page 261

    1400 Fountaingrove Parkway Santa Rosa, California 95403 U.S.A. the product: Synthesized Sweeper Product Name: Model Numbers: HP 837518 This declaration covers all options Product Options: of the above products. Safety: EMC: EN 55011 (1991)/CISPR ll(1990) Group 1 Class A EN 50082-l( 1992)

  • Page 262

    IEC 801-3(1984), 3 V/m (27-500 MHz) IEC 801-4(1988), 500 V signal, 1000 V AC Supplementary Information: The HP 83752A was qualified as part of a product family which includes the HP 83751A, HP 83751B, and HP 83752B. Santa Rosa, California...

  • Page 263

    IEC BOl-3(1984), 3 V/m (27-500 MHz) IEC 801-4(1988), 500 V signal, 1000 V AC Supplementary Information: The HP 83752B was qualified as part of a product family which includes the HP 83751A, HP 83751B, and HP 83752A. Santa Rosa, California...

  • Page 264

    The HP 83750 series synthesized sweepers may be operated safely if the following environmental conditions are met:...

  • Page 265

    Safety and Regulatory Information When installing the instrument in a cabinet, the convection into and out of the instrument must not be restricted. The ambient temperature (outside the cabinet) must be less than the maximum operating temperature of the instrument by 4 “C for every 100 Watts dissipated in the cabinet. If the total power dissipated in the cabinet is greater than 800 Watts then forced convection must be used.

  • Page 266

    Index...

  • Page 267

    Index Special characters defined. xii 10 MHz REF IN connector, 7-5 10 MHz REF OUT connector, 7-5 1 kHz square wave modulation, 10-4 488.1 compatibility codes, 7-12 accuracy power:specifications, 17-8 ac power requirements, 17-17 active marker, 9-3 defined, 9-3 add attenuator option, 17-19 add high stability timebase option, 17-19 address power meter, 15-13...

  • Page 268

    amplitude markers, 9-5 analog sweep mode, 12-8 specifications, 17-5 annunciators, 7-19 display, 7-19 fluorescent display, 7-19 LED, 7-19 ANSI Standard MC 1.1, 7-12 array user flatness, 5-2 ATT COUPLING, 15-l 1 attenuator option, 17-19 ATT SETTING, 15-12 automatic leveling control mode, 13-7 automatic sweep time, 15-8 autotracking, 1-5, 14-10 auxiliary interface connector, 7-8...

  • Page 269

    7-9 source module, 7-13 connector care, 7-15 connectors, 7-3 coaxial, 7-4-7 damage levels, 7-4-7 front panel, 7-3 HP-IB, 7-10-12 impedances, 7-4-7 multi-pin, 7-8-15 rear panel, 7-3 continuous trigger mode, 12-7 continuous wave, 11-10 CONTROL MODE, 15-27 conventions, xiv...

  • Page 270

    documentation options, 17-22 DP DEFIN, 15.26 dwell time, 12-4 enabling the save key, 15-24 entry keys, 14-2-10 entry off function, 14-9 environmental conditions, 18-8 environmental operating conditions, 17-16 error message action required, 16-5 detailed description, 16-5 manual error number, 16-5 SCPI error message, 16.5 SCPI error number, 16-5 error message format, 16-5...

  • Page 271

    8-5 features overview, iv firmware revision to view, 15-21 five year MIL-STD calibration service option W54, 17-21 five year return-to-HP calibration service option W52, 17-21 flatness specifications, 17-8 flatness calibration, 5-2, 13-10 flatness corrected power, 5-2-9 flatness correction...

  • Page 272

    FW REVISION, 15-21 specifications, 17-l 1 Hewlett-Packard sales and service offices, xi how to use this guide, xiv HP 83550 series connector option, 17-20 HP-IB address power meter, 15-18 to set, 8-10 to view, 8-10 HP-IB connector, 7-10-12 HP-IB connector mnemonics, 7-12...

  • Page 273

    locking, 15-25 keypad, 14-5 key representations, xiv knob. 7-26 language switch, 7-23 language switch settings, 7-24 left-hand display, 7-17 leveled output power check, 1-6 leveled power maximum, 17-7 leveling diode, 13-7 external, 2-2- 11 external:low output, 2-6 external:with power meters, 2-7 internal, 13-7 power meter, 13-7 source module, 13-8...

  • Page 274

    intensity, 9-5 off key, Q-7 to turn off, Q-7 z-mod, 9-5 marker scrolling, 9-4 marker sweep, 11-13 marker sweep mode, 11-12 marker to center frequency function, 11-8 marker A key, 9-8 marker viewing, 9-4 master/slave connector, 7-8 master/slave operation, 6-2-7 to set the sweeper to master or slave, 15.27 match maximum leveled power, 17-7...

  • Page 275

    17-20 rack mount, 17-20 warranty, 17-21 option W30 three years returnto-HP service, 17-21 option W50 five year return-to-HP calibration service, 17-21 option W52 five year return-to-HP cal service, 17-21 option W54 five year MIL-STD calibration service, 17-21 oscillator reference:speciEcations, 17-4...

  • Page 276

    specifications, 17-7 output power calibration, 13-9 output power check, l-8 output power level, 13-3 output power switch, 14-7 overview of sweeper, iii front and rear, 7-2-30 peaking, 1-5, 14-10 peak power function, 14-10 peak power tracking, 1-5 performance specifications, 17-2 period pulse function, 10-5 permanent errors, 16-2...

  • Page 277

    17-5 range frequency specifications, 17-4 R annunciator, 7-22 rear panel HP-IB lang/address switch, 7-23 rear panel features, 7-2-30 rear panel language switch, 7-23 rear panel RF output option, 17-19 recalling instrument states, 8-8 recall key, 8-8...

  • Page 278

    HP-IB, 7-11 RF OFF annunciator, 7-21 RF output specifications, 17-7 RF output connections, 7- 15 RF OUTPUT connector, 7- 15 RF output connector option, 17-19 RF output power specifications, 17-7 rf power calibration, 13-9 rf power key, 13-3 right-hand display, 7-18...

  • Page 279

    single sweep mode, 12-10 single trigger mode, 12-7 size, 17-17 slave to set the instrument to slave, 15-27 slave sweeper, 6-2-7 S LED, 7-22 S LED annunciator, 7-22 slope power, 13-6 SLOPE annunciator, 7-21 source match specification, 17-10 source module connector option, 17-20 source module interface connector, 7-13 source module interface signal codes, 7.13- 14 source module leveling, 2-9, 13-8...

  • Page 280

    specifications, 17-3 spectral purity specifications, 17-l 1 spurious non-harmonic:specification, 17-l 1 stability standard standby, 7-27 START annunciator, 7-20 start key, 11-4 statement of compliance, 18-8 STEP annunciator, 7-21 step attenuator option, 17-19 step keys, 14-3 stepped sweep to generate, 3-2 stepped sweep mode, 12-8 specifications, 17-5 stepped sweep time, 3-2...

  • Page 281

    6-2-7 system security, 15-22 table of step sizes, 14-3 task reference, vi terminator keys, 14-6 three years return-to-HP service option W30, 17-21 option, 17-19 time standard specifications, 17-4 T LED, 7-22 T LED annunciator, 7-22 trigger single, 12-10...

  • Page 282

    user’s guide outline, vi volts per GHz offset, 15-16 scale. 15-15 warmup time required, 17-16 warning notice defined, xii warranted performance, 17-2 warranty, ix warranty options, 17-21 warranty service, ix weight, 17- 18 width pulse, 10-6 zeroing the frequency display, 15-22 z-mod markers, 9-5 Index- 17...

This manual also for:

83752b, 83752

Comments to this Manuals

Symbols: 0
Latest comments: