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Wiltron 67 B Series Operation Manual

Swept frequency synthesizer
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490 JARVIS DRIVE
MORGAN HILL, CA 95037-2809
SERIES
67XXB
SWEPT FREQUENCY SYNTHESIZER
OPERATION MANUAL
IMPORTANT NOTICE
After turn on, the synthesizer requires one hour of warm up
to assure stable operation. Error codes that are displayed
during this hour may not be the result of actual failures and
should be rechecked at warm up completion by running
self test.
P/N: 10370-10202
REVISION: G
PRINTED: MAY 1994
COPYRIGHT 1992 WILTRON CO.

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  • Page 1 490 JARVIS DRIVE P/N: 10370-10202 MORGAN HILL, CA 95037-2809 REVISION: G PRINTED: MAY 1994 COPYRIGHT 1992 WILTRON CO.
  • Page 2 WARRANTY The WILTRON product(s) listed on the title page is (are) warranted against defects in materials and workmanship for one year from the date of shipment, except for YIG-tuned oscillators and all WILTRON manufactured microwave components, which are warranted for two years.
  • Page 3 MANUAL CHANGES MANUAL: Title: Series 67XXB Swept Frequency Synthesizer Operation Manual Part Number: 10370-10202 Rev. Ltr/Date: G / May 1994 CHANGE PACKET Part Number: 10900-00149 INSTRUCTIONS 1. Make the manual changes listed below. The changes are listed in numerical order by page number. Effectivity is all swept frequency synthesizer serial numbers.

  • Page 4: Table Of Contents

    CONTENTS Paragraph Title Page SECTION I — GENERAL INFORMATION SCOPE OF THE MANUAL ......1-3 INTRODUCTION .

  • Page 5: Paragraph Title Page

    Paragraph Title Page 3–3.5 MODULATION and AM/FM Keys and MODULATION Connectors (Figure 3-9) ..... . 3-21 3–3.6 MEASURE Key and Indicator (Figure 3–10) ..3-22 3–3.7 LEVELING or EXT GAIN CAL Key, Indicators, and Connector (Figure 3–11) .
  • Page 6 List of Figures Figure Description Page Figure 1-1. Typical Series 67XXB Swept Frequency Synthesizer ..1-2 Figure 2-1. Synthesizer Rear Panel Showing LINE SELECT Switch ..2-3 Figure 2-2. GPIB Connector Panel ..... . . 2-4 Figure 3-1.
  • Page 7 ....1-10 Table 2-1. WILTRON Service Centers ....2-6 Table 3-1.

  • Page 8: Table 1-4. Recommended Test Equipment

    SECTION I GENERAL INFORMATION CONTENTS Paragraph Title Page SCOPE OF THE MANUAL ......1-3 INTRODUCTION ....... 1-3 IDENTIFICATION NUMBER .

  • Page 9: Figure 1-1. Typical Series 67Xxb Swept Frequency Synthesizer

    Figure 1-1. Typical Series 67XXB Swept Frequency Synthesizer 67XXB OM...

  • Page 10: Section I - General Information

    The Series 67XXB Swept Frequency Synthesizers bleshooting data, schematics, and block diagrams) are microprocessor-based, GPIB, synthesized signal and parts lists for all 67XXB models. The WILTRON sources that generate swept and CW frequencies part number for the MM is 10370-10242.

  • Page 11: Options

    +10 dBm, ≤20 GHz 6769B 0.01-40 +5 dBm, >20 GHz Code Type of Testing Calibration 6772B 40-60 0 dBm Performance Verification * Optional attenuator reduces rated power. Troubleshooting K Connector ® is a registered trademark of Wiltron Company. 67XXB OM...
  • Page 12 I GENERAL INFORMATION SPECIFICATIONS Table 1-3. Performance Specifications, 67XXB Swept Frequency Synthesizer (1 of 5) MANUAL SWEEP MODE FREQUENCY Frequency information is shown in Table 1-2. Provides stepped, phase-locked adjustment of frequencies between sweep limits. CW MODE Output: Nine independent, presettable CW frequencies. PROGRAMMABLE FREQUENCY AGILITY: Accuracy: Same as internal or external t ime base.
  • Page 13 SPECIFICATIONS I GENERAL INFORMATION Table 1-3. Performance Specifications, 67XXB Swept Frequency Synthesizer (2 of 5) SWEEP-RELATED INPUTS/OUTPUTS (Continued) RESIDUAL FM (CW Mode, 50 Hz-15 kHz BW, Typical) Pen Lift Output: Normally open or normally closed inter- nal relay contacts during sweep retrace. BNC, rear panel. Frequency Range Residual FM Sequential Sync Output: Provides TTL high signal dur-...
  • Page 14 20 to 26.5 26.5 to 40 40 to 60 Built-In Power Meter Range: + 16 dBm to –35 dBm. Accuracy Compatible with Wiltron 560– 7, 5400-71, or 6400–71 Se- ±1.0 dB ±1.5 dB ±2.0 dB ±3.0 dB 0 to 12 dB ries Detectors.
  • Page 15 SPECIFICATIONS I GENERAL INFORMATION Table 1-3. Performance Specifications, 67XXB Swept Frequency Synthesizer (4 of 5) Pulse Sync Output: TTL high signal, 100 ns minimum MODULATION pulse width, preceding RF pulse by 100 ns. BNC, AM, FM, and pulse modulation can be applied simultane- rear panel.
  • Page 16 I GENERAL INFORMATION SPECIFICATIONS Table 1-3. Performance Specifications, 67XXB Swept Frequency Synthesizer (5 of 5) GENERAL Maximum Deviation: Phase-Locked Mode: Stored Setups: Saves front panel settings and nine ad- ±20 times the modulation rate. ditional stored setups for approximately ten years. Setups Unlocked Mode: ±25 MHz can be recovered directly by using the RECALL function or sequentially by using the SCAN function.
  • Page 17 AM Mod. Rates: DC to 100 kHz AM Accuracy: ± 3% Filters: 50 Hz low pass, 15 kHz high pass Scalar Network Ana- Frequency Range: 0.01 to 40 GHz WILTRON Model 562, with lyzer, with RF Detectors: P, C RF Detectors 560-7N50 (0.01 to 18 GHz) 560-7K50 (0.01 to 40 GHz)
  • Page 18 Mixer Frequency Range: 1 to 26 GHz RHG Electronics Laboratory, Inc., Model DMS1-26A Attenuator Frequency Range: dc to 26.5 GHz WILTRON, Model 41BK-10 Max Input Power: >+16 dBm Attenuation: 10 dB Microwave (Pulse) De- Output Polarity: Negative WILTRON, Model SC3800 Frequency Range: 0.01 to 40 GHz...
  • Page 19 SECTION II INSTALLATION CONTENTS Paragraph Title Page INTRODUCTION ....... 2-3 INITIAL INSPECTION .

  • Page 20: Introduction

    WILTRON. Keep the shipping materials for the carrier’s inspection. Figure 2-1. Synthesizer Rear Panel Showing LINE SELECT Switch...

  • Page 21: 2-4.1 Interface Connector

    This interconnection is via a special GPIB cable. 2-4.2 Cable Length Restrictions The WILTRON Part number for such a cable is 2000-1, -2, or -4 (1, 2, or 4 meters in length). The GPIB system can accommodate up to 15 instru- ments at any one time.

  • Page 22: 2-4.5 Data Delimiting (Cr-Cr/Lf)

    PREPARATION FOR STORAGE AND/OR SHIPMENT 2-4.5 Data Delimiting (CR-CR/LF) turned to WILTRON for repair, advise WILTRON Customer Service; they will send a new shipping Data is delimited on the GPIB by either the car- container free of charge. In the event neither of...

  • Page 23: Table 2-1. Wiltron Service Centers

    WILTRON SERVICE CENTERS II INSTALLATION Table 2-1. WILTRON Service Centers UNITED STATES CHINA JAPAN WILTRON COMPANY WILTRON BEIJING SERVICE ANRITSU CORPORATION 490 Jarvis Drive CENTER 1800 Onna Atsugi-shi Morgan Hill, CA 95037-2809 416W Beijing Fortune Building Kanagawa-Prf. 243 Japan Telephone: (408) 778-2000...
  • Page 24 SECTION III LOCAL (FRONT PANEL) OPERATION CONTENTS Paragraph Title Page 3–1 INTRODUCTION ......3-3 3–2 GETTING STARTED .

  • Page 25: Figure 3-1. Front Panel, 67Xxb Swept Frequency Synthesizer

    Figure 3-1. Front Panel, 67XXB Swept Frequency Synthesizer 67XXB OM...

  • Page 26: Introduction

    SECTION III LOCAL (FRONT PANEL) OPERATION INTRODUCTION time you switch line power from STANDBY to This section provides information and instructions for operating the 67XXB Series equipment using c. Resetting the Controls to Their Default the front panel controls. It includes a tutorial “Get- Settings.

  • Page 27: Table 3-1. Reset (Default) Parameters

    RESET (Default) Parameters III FRONT PANEL OPERATION Table 3-1. RESET (Default) Parameters MIN/MAX POWER LEVEL PARAMETERS (dBm) FREQUENCY PARAMETERS (GHz) 67XXB LEVEL 1 Option 2A Option 2B Option 2C Standard MODEL (Max.) Attenuator Atten (High End Atten (High End Model Freq >20 and Freq >26.5 and LEVEL 2...
  • Page 28 III FRONT PANEL OPERATION GETTING STARTED b. Selecting a CW Frequency. d. Selecting a Sweep. ANALOG SWP F1–F9 Press SCAN ∆ STEP SWEEP Press to light either the Analog or Step Sweep indica- F1–F9 tor. Analog sweep should be used when a con- SCAN ∇...

  • Page 29: 3-2.4 Entering Data

    GETTING STARTED III FRONT PANEL OPERATION 3-2.4 Entering Data 3. To enter time data: a. Using the Keypad. SHIFT 1. To enter frequency data: THEN Press ENTER ∆F F1–F9 Press SCAN ∆ ANALAOG SWP TIME to select the sweep time parameter. Then en- ter the desired value from the keypad and F1–F9 SCAN ∇...

  • Page 30: Figure 3-2. Increasing A Parameter Using The Increase Decrease Knob

    III FRONT PANEL OPERATION GETTING STARTED 2. To select a power level c. Using the DECREASE INCREASE Knob. LEVEL 1 Press There are two methods available for increasing or decreasing a parameter’s value using the DE- LEVEL CREASE INCREASE knob. The first is to se- LEVEL 2 lect the desired frequency, level, or time pa- PWR SWP...

  • Page 31: 3-2.5 Setting Level And Modulation

    GETTING STARTED III FRONT PANEL OPERATION 3–2.5 Setting Level and Modulation a. Controlling Pulse Modulation. 1. With the 67XXB, there is no need for an ex- ternal pulse modulator. Modulation capabil- ity is built into the RF deck. This feature Press EXTERNAL reduces the system complexity and provides...
  • Page 32 III FRONT PANEL OPERATION GETTING STARTED 1. Connect an external pulse generator to either 5. Select the desired modulation parameter by pressing SHIFT Enter the desired in- ternal period value us- THEN ing the keypad and ter- INTERNAL minator keys. PERIOD 2.
  • Page 33 GETTING STARTED III FRONT PANEL OPERATION TRIGGER THEN 108 on keypad 2. To trigger the internal pulse generator TRIGGER Press DELAY • – 3. The pulse width is determined by the pulse 7. To trigger the internal pulse generator with width setting for internal pulse operation;...
  • Page 34 III FRONT PANEL OPERATION GETTING STARTED Press above SHIFT-TRIGGER FM SENS quence and enter 081 on the keypad. (e) On the external signal generator, enter a to activate the external FM input. modulating frequency as follows: (d) Select the sensitivity for FM deviation as follows: (1) For the phase-locked mode: Enter values between 50 Hz and 250 kHz,...

  • Page 35: Figure 3-3. External Gain Calibrate Procedure

    GETTING STARTED III FRONT PANEL OPERATION Press back to the front panel EXT LEVEL con- SHIFT nector. THEN NOTE When using external leveling, AM SENS you must adjust the leveling loop gain for compatibility with the ex- ternal power detector (Figure 3- (2) On keypad, enter the desired –AM percent-per-volt sensitivity value (a number between 1 and 99.9), and...

  • Page 36: Using The Rf Level Function

    III FRONT PANEL OPERATION GETTING STARTED (a) Power Measurement Function. This func- signal was only 0.5V peak, the MODULA- tion allows you to measure the micro- TION/TIME display will read 125 kHz/V wave power from a test device and dis- “FM DEV”...
  • Page 37 GETTING STARTED III FRONT PANEL OPERATION LEVEL 1 Press (d) Enter the high level value on the keypad, and terminate using LEVEL dB/dBm LEVEL 2 PWR SWP Press PWR SWP DWELL NUMBER TIME OF STEPS 2. Enter the digits of the desired level on the keypad, then press Observe that the level readout on the LEVEL display sweeps from the low to the...

  • Page 38: Using Stored Setups

    III FRONT PANEL OPERATION GETTING STARTED LEVEL 3. To change the number of levels at which the Press OFFSET power sweep dwells, proceed as follows: ENTER Press OFFSET SHIFT 6. Observe the that the displayed LEVEL value decreased by 10 dBm and that the OFFSET THEN annunciator appears.

  • Page 39: 3-2.8 Monitoring The Output

    GETTING STARTED III FRONT PANEL OPERATION alerts you that the RF output signal is not phase- LEVEL locked. NOTE The NOT ∅ – LOCKED indicator is lit 2. To recall a stored setup, when in ANALOG SWEEP or UN- LOCKED FM modes. RECALL Press SAVE...

  • Page 40: 3-3.1 Self Test Or Reset And Line Keys (Figure 3-5)

    III FRONT PANEL OPERATION FRONT PANEL DESCRIPTION 3-3.1 SELF TEST or RESET and LINE Keys (Figure 3-5) Figure 3-5. SELF TEST or RESET and LINE Keys a. SELF TEST or RESET <Shifted> Key Figure 3-6. FREQ ENTRY Keys SELF TEST: Provides an instrument self test. If ciated on the RF frequency display.

  • Page 41: 3-3.3 Sweep And Trigger Keys And Indicators (Figure 3-7)

    FRONT PANEL DESCRIPTION III FRONT PANEL OPERATION c. MARKER SELECT Key This key selects as a potential frequency marker the frequency parameter then being annunci- ated on the FREQUENCY display. The potential marker becomes an actual marker when the MARKERS key is pressed to light either the VIDEO or INTENSITY indicators.
  • Page 42 III FRONT PANEL OPERATION FRONT PANEL DESCRIPTION play SWEEP and F5 annunciators light when In any sweep mode, when the sweep width is ≤50 MHz only the midpoint frequency is phase- the function is activated. lock corrected. ALT functions the same as ALT above. In the STEP SWEEP mode, the frequency changes in discrete, synthesized steps between d.

  • Page 43: 3-3.4 Data Entry Keys, Indicators, And Control (Figure 3-8)

    FRONT PANEL DESCRIPTION III FRONT PANEL OPERATION with optimal retrace time. its proper units (kHz, dBm, ms, etc.), (1) the size parameter closes, (2) the parameter that was opened immediately prior to pressing this key In the LINE mode, the sweep is triggered to start by the power-line-voltage waveform.

  • Page 44: Modulation And Am/Fm Keys And Modulation Connectors (Figure 3-9)

    III FRONT PANEL OPERATION FRONT PANEL DESCRIPTION assigns the appropriate units. An F1–F9 or ∆F The associated LED lights when this mode is selected. frequency entry may be terminated in MHz; however, it is always displayed in GHz. PERIOD accesses the pulse-period parameter and opens it for updating using the DATA EN- MHz mSec STEPS Key TRY keys.

  • Page 45: Measure Key And Indicator (Figure 3-10)

    FRONT PANEL DESCRIPTION III FRONT PANEL OPERATION d. MODULATION Connectors The associated LED lights when the function is PULSE/TRIG lets you use an external TTL level activated. to trigger the internal pulse generator. The po- larity (TTL high-active or TTL low-active) of the AM SENS accesses the AM modulation-sensi- gating signal is selectable via either the GPIB tivity parameter and opens it for updating using...

  • Page 46: 3-3.7 Leveling Or Ext Gain Cal Key, Indicators, And Connector (Figure 3-11)

    III FRONT PANEL OPERATION FRONT PANEL DESCRIPTION ∆PWR selects the power-difference measurement 3-3.8 RF LEVEL Keys and Indicators (Figure 3-12) function. You must activate the MEASURE EXT PWR function before using the ∆PWR function. Measured power at the time ∆PWR is activated be- comes a reference level and the display is set to 0 dB.
  • Page 47 FRONT PANEL DESCRIPTION III FRONT PANEL OPERATION The associated LED lights when this parameter external transmission line or for the gain of a is open for entry. test device. The associated LED lights when this function PWR SWP DWELL TIME accesses this parame- is selected.

  • Page 48: 3-3.9 Rf Indicators And Rf Output Connector (Figure 3-13)

    III FRONT PANEL OPERATION FRONT PANEL DESCRIPTION 3-3.9 RF Indicators and RF OUTPUT Connector (Figure 3-13) Figure 3-13. STORED SETUPS Keys the rear panel MEMORY SEQ INPUT also can be used to scan the setups. b. RECALL or SAVE <Shifted> Key RECALL recalls a stored setup, the number of which is entered on the keypad.

  • Page 49: 3-3.12 Gpib Indicators And Bus Adrs/ Return To Lcl Key (Figure 3-16)

    SELF-TEST FEATURE III FRONT PANEL OPERATION Figure 3-15. FREQUENCY, MODULATION/TIME, and LEVEL Displays • c. TALK Indicator FM deviation and modulation sensitivity • This LED lights when the synthesizer is ad- AM depth and modulation sensitivity dressed to talk and remains lit until unad- dressed.

  • Page 50: Figure 3-17. Pinout Diagram For Aux I/O Connector

    III FRONT PANEL OPERATION REAR PANEL DESCRIPTION Figure 3-17. Pinout Diagram for AUX I/O Connector 67XXB OM 3-27...

  • Page 51: Figure 3-18. Rear Panel, 67Xxb Series Swept Frequency Synthesizers

    REAR PANEL DESCRIPTION III FRONT PANEL OPERATION AUX I/O: Provides a single-cable interface with the marker pulses during the positive portions of the sig- Model 560A Scalar Network Analyzer and future WIL- nal (forward sweep). The last-selected (enhanced) TRON instruments. A pinout diagram is shown in Fig- marker appears as a –10V level.
  • Page 52 III FRONT PANEL OPERATION REAR PANEL DESCRIPTION GATED INT PM: ON. Shift-Plus-Trigger Routines. Press the SHIFT then Turns on the internally gated TRIGGER keys and enter the indicate numerals on mode of operation. (paragraph 3-3.5.) the keypad to implement the listed functions. GATED INT PM: OFF.
  • Page 53 SECTION IV GPIB OPERATION CONTENTS Paragraph Title Page INTRODUCTION ....... 4-3 DESCRIPTION OF THE IEEE-488 (IEC-625) INTERFACE BUS .

  • Page 54: Figure 4-1. Interface Connections And Gpib Bus Structure

    DEVICE A Able to talk, listen, and control Data Bus DATA INPUT/OUTPUT LINES (e.g. CALCULATOR OR (8 signal lines) COMPUTER) DEVICE B Able to talk and listen Data Byte Transfer (e.g. 67XXB SYNTHESIZER) Control Bus HANDSHAKE Lines (3 signal lines) DEVICE C Only able to listen General Interface...

  • Page 55: Introduction

    SECTION IV GPIB OPERATION INTRODUCTION eral address (either primary or secondary), a control word, or a data byte. Data bytes are usually format- This section provides a description of the GPIB and ted in ASCII code, without parity. the synthesizer command codes. It also provides sev- eral examples of bus programming 4-2.2 Management Bus Description...

  • Page 56: 4-2.3 Data Byte Transfer Control (Handshake) Bus Description

    GPIB OPERATION IV GPIB INFORMATION FALSE (0/HIGH) TRUE (1/LOW) FALSE (0/HIGH) TRUE (1/LOW) NRFD FALSE (0/HIGH) NDAC TRUE (1/LOW) Figure 4-2. Typical Handshake Operation 4-2.3 Data Byte Transfer Control (Hand- NDAC goes LOW in preparation for the next data shake) Bus Description interchange (arrow 4).
  • Page 57 IV GPIB INFORMATION COMMAND CODES, DESCRIPTION Table 4-1. 67XXB IEEE-488 Bus Subsets 2. A binary-byte format for entering both the GPIB Subset Function Description status byte mask commands (paragraph 4- 4.11) and the RCF and RCM stored-setup Acceptor Complete commands (paragraph 4-4.10). Handshake Capability Source...

  • Page 58: Table 4-2. Command Code Classes

    COMMAND CODES, DESCRIPTION IV GPIB INFORMATION Table 4-2. Command Code Classes Command Class Command Codes* Paragraph Table Page Parameter Entry F1, F2, F3 (M1), F4 (M2), F5 (F0), F6-F9, DLF, SDT, 4-4.2 4-7, 4-8 Commands SNS, SWT, LOS, PDT, PNS, AMS, FMS, PDY, PER, PW, SYZ, UP, DN, CLO, PR Data Entry 0 thru 9, -, ., DB, DM, GH, MH, KH, SEC, MS, US, GV,...

  • Page 59: Command Codes: Parameter And Data Entry

    IV GPIB INFORMATION COMMAND CODES, DESCRIPTION • 4-4.2 Command Codes: Parameter and Data By sending a numeric value followed by the Entry Commands appropriate terminator. • By incrementing or decrementing its value Table 4-3 lists the 22 commands that enable parame- using an associated step size.

  • Page 60: Table 4-4. Data Entry Commands

    COMMAND CODES, DESCRIPTION IV GPIB INFORMATION Table 4-3. Parameter Entry Codes (Continued) Command Code Parameter Values Terminator Step Size FM Sensitivity Unlocked: 10 kHz/V—25 MHz/V Locked: 10 kHz/V—5 MHz/V 1 µs to 100 ms Pulse Period, Internal Program- mable Pulse Generator (PPG) Pulse Rate, Internal Program- mable Pulse Generator (PPG) Note : This parameter is...

  • Page 61: 4-4.3 Command Codes: Cw Frequency

    IV GPIB INFORMATION COMMAND CODES, DESCRIPTION Six step sizes are used, with some sizes shared between parameters that have common units. Most of the parameters listed in Table 4-3 have associated step sizes. As shown, the ten frequency parameters have a common step size, as do the three level parameters (the commands to set Level 1 and Level 2 are described in paragraph 4-4.7).

  • Page 62: 4-4.4 Command Codes: Analog And Digital Sweep

    COMMAND CODES, DESCRIPTION IV GPIB INFORMATION Table 4-5. CW Frequency Commands Command Code Function Opens For Entry 1. These commands place the synthesizer in the CW mode at the preset (or a previously set) frequency. 2. Programming any of these commands will deselect any previously programmed CW command.

  • Page 63: Table 4-6. Analog And Digital Sweep Commands

    IV GPIB INFORMATION COMMAND CODES, DESCRIPTION Programming Note: If the commanded sweep range d. Single-Sweep Trigger/Reset is invalid, a parameter error message (paragraph Two single sweep commands are available; one 4-6) will be generated, and the output of the synthe- starts the sweep and another resets it.
  • Page 64 COMMAND CODES, DESCRIPTION IV GPIB INFORMATION Table 4-6. Analog and Digital Sweep Commands Command Code Function Opens For Entry Alternate Sweep Selects Alternate Sweep F1 – F2 None Full None F3 – F4 None ∆F F5 None ∆F F6 None ∆F F1 None Sweep Trigger...

  • Page 65: Figure 4-4A Programming Example, Du1

    IV GPIB INFORMATION COMMAND CODES, DESCRIPTION 10 ! "DUAL" 20 CLEAR 30 DISP "ENTER # OF STEPS" 40 INPUT S 50 DISP "ENTER WAIT TIME [mS] 60 INPUT W 70 WAIT 100 80 DISP "ENTER ’LO’ START FREQ [GHz]" 90 INPUT F1 100 DISP "ENTER ’LO’...

  • Page 66: 4-4.5 Command Codes: Frequency Marker

    IV GPIB INFORMATION COMMAND CODES, DESCRIPTION Triggers a single sweep. Selects synth step sweep. Aborts the sweep. Triggers a single sweep. Selects the External/Single triggering mode. Selects the ANALOG sweep mode. Selects AUTO triggering. Selects the F1-F2 sweep. Figure 4-5. Example of a Sweep Command 4-4.5 Command Codes: Frequency Marker Figure 4-6 shows an example of frequency marker...

  • Page 67: Figure 4-6. Example Of Frequency Marker Programming

    COMMAND CODES, DESCRIPTION IV GPIB INFORMATION F1 ME0 F7 ME1 F4 ME1 Turns both markers off, but leaves the F7 and F4 markers enabled. Therefore, when IM1 or VM1 is next programmed, these two fre- quency markers will reappear on the display—provided their frequen- cies are within the 6700A’s sweep range.

  • Page 68: Table 4-9. Power Leveling Commands

    IV GPIB INFORMATION COMMAND CODES, DESCRIPTION Table 4-8. Modulation Commands (2 of 2) Command Function Code 1. Turns on the internal PPG, sets the PPG to produce a 1 kHz square wave, and enables the internal pulse modulator to modulate the RF output. 2.

  • Page 69: Figure 4-7. Example Of Power Level Programming

    COMMAND CODES, DESCRIPTION IV GPIB INFORMATION Table 4-9. Power Leveling Commands (2 of 2) Command Opens For Function Code Entry Turns off the power leveling functions. The maximum power available None from the synthesizer is output. CAUTION For some models, this power level can exceed 100 mW (+20 dBm).
  • Page 70 IV GPIB INFORMATION COMMAND CODES, DESCRIPTION 4-4.8 Command Codes: Measure Function Commands Table 4-10 lists the Measure Function Commands. These commands provide for measuring any of the following: • The actual modulation depth of the output signal, as caused by an external AM signal connected to either the front panel EXT AM jack or the rear panel AM INPUT jack.

  • Page 71: 4-4.8 Command Codes: Output

    IV GPIB INFORMATION COMMAND CODES, DESCRIPTION Table 4-10. Measure Function Commands Command Function Code Selects the AM Measurement mode, whereby the synthesizer measures the depth of the external AM input. The measurement results will be sent to the controller upon receipt of an OMM command (Table 4-11).

  • Page 72: Figure 4-8. Example Of Output Command Programming

    COMMAND CODES, DESCRIPTION IV GPIB INFORMATION Table 4-11. Output Commands (2 of 2) Command Function Code Returns the LEVEL 2 power value to the controller. The units are in dBm. Returns the Level Offset power value to the controller. The units are in dB. Returns the internal power meter measurement value to the controller.

  • Page 73: 4-4.9 Command Codes: Stored Setup

    IV GPIB INFORMATION COMMAND CODES, DESCRIPTION 4-4.9 Command Codes: Stored Setup The SAF and RCF commands save and recall the Commands current front panel setup by outputting or receiving a 300-byte (approximately) data string that de- Table 4-12 lists the Stored Setup Commands. These scribes the instrument state.

  • Page 74: 4-4.10 Command Codes: Service Request (Srq) And Status Byte

    COMMAND CODES, DESCRIPTION IV GPIB INFORMATION 4-4.10 Command Codes: Service Request whether a bit has been enabled to cause an SRQ, the (SRQ) and Status Byte Commands bit will still be set (and read by the controller) when the condition on which it reports has been detected. Table 4-13 lists the Service Request and Status Byte Commands.

  • Page 75: Figure 4-9. Status Bytes

    IV GPIB INFORMATION COMMAND CODES, DESCRIPTION Table 4-13. Service Request (SRQ) Commands (2 of 2) Command Function Code Inhibits an SRQ from being generated when the RF Unlevelled bit is set. This is the default mode. NOTE “*” All status bytes are latched except those indicated with the in Figure 4-9.

  • Page 76: 4-4.12 Command Codes: Group Execute Trigger Mode

    COMMAND CODES, DESCRIPTION IV GPIB INFORMATION The 67XXB has a software mask that permits manipulation of the three status bytes over the bus. This manipulation is ac- complished by sending the command codes MB0, MB1, MB2, or all three at once, followed by an argument that assigns an on/off condition for each bit in the byte.

  • Page 77: Table 4-15. Group Execute Trigger Commands

    IV GPIB INFORMATION COMMAND CODES, DESCRIPTION Table 4-14. Shift-Plus-Trigger Routines Override Commands Command Function Code External AM Input, AC Coupled External AM Input, DC Coupled Blanking Pulse, –5 Volts Blanking Pulse, +5 Volts External Pulse Input, TTL High is RF Off External Pulse Input, TTL High is RF On Pen Lift Relay, Contacts Normally Closed Pen Lift Relay, Contacts Normally Open...

  • Page 78: 4-4.13 Command Codes: Fast Frequency

    COMMAND CODES, DESCRIPTION IV GPIB INFORMATION 4-4.13 Command Codes: Fast Frequency 4-4.15 Command Codes: Miscellaneous Commands Commands Table 4-16 lists the Fast Frequency-Switching Com- Table 4-18 is a list of miscellaneous commands that mands. These commands provide for reducing the do not fit into any of the other classifications.

  • Page 79: Table 4-18. Miscellaneous Commands

    Turns off the high-resolution mode. Turns off the CW ramp. Turns on the CW ramp. BUS MESSAGES, SYNTHESIZER ments showing how the WILTRON 85 and the HP RESPONSE TO Series 200 bus controllers implement the recognized bus messages. Table 4-19 lists the bus messages recognized by the synthesizer.

  • Page 80: Bus Messages, Synthesizer Response To

    BUS MESSAGES, SYNTHESIZER RESPONSE TO IV GPIB INFORMATION Table 4-19. Bus Messages Recognized by the 67XXB Series Synthesizers (2 of 2) Messages How Message Is Used By the Synthesizer Remote Places the synthesizer under remote (GPIB) control if the REN line is TRUE and the synthesizer has Enable been addressed to listen.

  • Page 81: Program Errors

    IV GPIB INFORMATION PROGRAM ERRORS Table 4-20. Methods of Generating Bus Commands Method Of Execution Function Wiltron 85 HP Series 200 Go to Local (GTL) LOCAL 7 LOCAL 7 LOCAL 705 LOCAL 705 Group Execute Trigger TRIGGER 7 TRIGGER 7...

  • Page 82: Reset Programming And Default Conditions

    RESET PROGRAMMING AND DEFAULT CONDITIONS IV GPIB INFORMATION RESET PROGRAMMING AND mand sequence ensures that all parameters and DEFAULT CONDITIONS commands assume their preprogrammed state each time reset is desired. Table 4-21 describes the five methods that can be used to reset the synthesizer. They provide a means PROGRAMMING EXAMPLES for quickly returning the synthesizer to its default (preprogrammed) operational state.

  • Page 83: Figure 4-11. Reset Programming Statements

    IV GPIB INFORMATION PROGRAMMING EXAMPLES Figure 4-11. Reset Programming Statements Figure 4-12. Test Equipment Setup for Runing GPIB Program Examples 67XXB OM 4-29...

  • Page 84: Table 4-22. Using The Output Identify Command

    This subroutine is used in the programs in Tables 4-23 thru 4-24 to read the limits of the synthesizer. This subroutine can also be used to identify a WILTRON Series 6600 Programmable Sweep Generator.

  • Page 85: Table 4-23. Controlling Cw Frequency/Parameter Entries

    IV GPIB INFORMATION PROGRAMMING EXAMPLES Table 4-23. Controlling CW Frequency/Parameter Entries The following program (1) receives entries from the keyboard to set intial frequency and step-size parameters, and (2) acti- vates the soft keys on the controller so that they can step the frequency up or down. 20 ! PARAMETER ENTRY, SYZ, UP, AND DN COMMANDS 30 Address=705 40 CALL Iddev(Address,Model,Fmin,Fmax,Pmin,Pmax)

  • Page 86: Table 4-24. Controlling Power Level And Power Sweep

    PROGRAMMING EXAMPLES IV GPIB INFORMATION Table 4-24. Controlling Power Level and Power Sweep The following program accepts user inputs for (1) power sweep starting and ending levels, (2) number of steps in the sweep, and (3) sweep dwell times. After accepting such imputs, the program then commands the synthesizer to obtain a display of the power sweep.

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