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Series 12000A Microwave Synthesizers

4-16

Publication 31231, Rev. J, October 2003

4.4.2

Frequency Modulation Test

4.4.2.1

Description

The output from the 12000A is connected to a discriminator. The discriminator output is monitored on
an oscilloscope to determine deviation and bandwidth.

4.4.2.2

Equipment Required

UUT

²

Function Generator

²

Oscilloscope

²

Digital Voltmeter

²

FM Test Fixture

4.4.2.3

Delay Discriminator Description

In order to calibrate and test the frequency modulation circuits, a special test fixture must be assembled.
The recommended FM test fixture includes an RF splitter, two lines of unequal length, and an RF mixer.
The RF output of the 12000A is divided by the splitter into two signals, unequally delayed.

Different length cables determine the number of frequency nulls or 0 volt outputs found in the
frequency band of interest. For the Frequency Modulation performance test, the frequency band of
interest is 4 to 8 GHz.

The procedure does not identify a specific mixer for the discriminator circuit. There are two factors to
consider when selecting a mixer.

1.

The mixer RF and LO frequency range must be greater than 4 to 8 GHz.

2.

A low conversion loss mixer will provide a higher output.

Figure 4-7: Frequency Modulation Test

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Содержание Series 12000A

Страница 1: ...9001 Certified Product Certified Process Giga tronics Incorporated v 4650 Norris Canyon Road San Ramon CA 94583 925 328 4650 800 726 4442 925 328 4700 Fax v Customer Service 800 444 2878 925 328 4702 Fax Publication 31231 Rev J October 2003 Series 12000A Microwave Synthesizers Operation Manual www gigatronics com ...

Страница 2: ...pecification and price change privileges are reserved by Giga tronics MODEL NUMBERS The Series 12000A has model numbers for each instrument with a specific frequency range as described in Chapter 1 All models are referred to in this manual by the general term 12000A except where it is necessary to make a distinction between the models In these cases the specific model number s will be used All tec...

Страница 3: ...DECLARATION OF CONFORMITY ...

Страница 4: ......

Страница 5: ...nt Panel 1 5 1 3 2 I O Connectors Rear Panel 1 6 1 3 3 Computer Interface 1 8 1 3 3 1 GPIB 1 8 1 3 3 2 EIA 232 1 9 1 3 4 Power 1 10 1 3 4 1 Line Fuse 1 10 1 3 4 2 Fuse Installation 1 10 1 4 Specifications 1 11 1 4 1 CW Operation 1 11 1 4 2 RF Output 1 13 1 4 3 Spectral Purity 1 15 1 4 4 Step Frequency Sweep 1 16 1 4 5 Step Power Sweep 1 17 1 5 Supplemental Specifications 1 18 1 5 1 General Specifi...

Страница 6: ...on Source 1 32 1 8 1 2 Frequency Modulation Source 1 33 1 8 1 3 Pulse Modulation Source 1 33 1 8 1 4 Pulse Start Variable Delay 1 34 1 8 1 5 Pulse Width 1 34 1 8 1 6 Pulse Modes 1 35 1 8 1 7 Externally Triggered PM Envelope 1 35 1 8 1 8 PM Sync Output 1 35 1 8 1 9 PM Video Output 1 35 1 8 2 Option 29 Scan Modulation Specifications 1 36 1 8 2 1 Envelope Parameters 1 36 1 8 2 2 Scan Mode 1 36 1 8 2 ...

Страница 7: ...500A 12700A Only 2 37 2 3 15 External Scan Amplitude Modulation Opt 29 Series 12500A 12700A Only 2 39 2 3 16 Internal Modulation Opt 24 with Scan AM Opt 29 Selected 2 41 2 3 17 External Frequency Modulation Series 12500A 12700A Only 2 42 2 3 18 Internal Frequency Modulation Series 12500A 12700A Only 2 44 2 3 19 Phase Modulation Series 12500A 12700A Only 2 46 2 3 20 External Pulse Modulation Series...

Страница 8: ...3 3 10 Marker Commands 3 63 3 3 11 Step Power Sweep Commands 3 64 3 3 12 Ramp Power Sweep Commands Series 12700A Only 3 67 3 3 13 Amplitude Modulation Commands Series 12500A 12700A Only 3 70 3 3 14 Frequency Modulation Commands Series 12500A 12700A Only 3 73 3 3 15 Pulse Modulation Commands Series 12500A 12700A Only 3 75 3 3 16 Output Commands 3 77 3 3 17 ALC Commands 3 81 3 3 18 Instrument Contro...

Страница 9: ...quency Modulation Test 4 16 4 4 2 1 Description 4 16 4 4 2 2 Equipment Required 4 16 4 4 2 3 Delay Discriminator Description 4 16 4 4 2 4 Procedure 4 18 4 4 3 Pulse Modulation On Off Ratio Test 4 19 4 4 3 1 Description 4 19 4 4 3 2 Equipment Required 4 19 4 4 3 3 Procedure 4 19 4 4 4 Pulse Modulation Rise Fall Time Test 4 20 4 4 4 1 Description 4 20 4 4 4 2 Equipment Required 4 20 4 4 4 3 Procedur...

Страница 10: ... RF Output Connector A 3 A 3 3 Option 23 Type N RF Output Connector A 3 A 3 4 Option 24 Internal Modulation Generator A 3 A 3 5 Option 26 Step Attenuator 20 GHz Instruments A 4 A 3 6 Option 29 Scan Modulation A 4 Index Series 12000A Microwave Synthesizers Index 1 B Firmware Field Upgrade B 1 Introduction B 1 B 2 Series 12000A Firmware Upgrade Procedure B 1 ...

Страница 11: ...Preface Publication 31231 Rev J October 2003 vii ...

Страница 12: ...quency Sweep Menu 2 31 Figure 2 20 Ramp Power Sweep Configuration Menu 2 33 Figure 2 21 Amplitude Modulation Selection 2 35 Figure 2 22 Amplitude Modulation Selection Internal 2 36 Figure 2 23 Scan Modulation Selection 2 38 Figure 2 24 Scan AM Internal 2 40 Figure 2 25 Frequency Modulation Selection 2 41 Figure 2 26 Frequency Modulation Internal Phase Modulation Deviation Selections 2 43 Figure 2 ...

Страница 13: ...ardware Configurations 1 8 Table 1 4 EIA 232 Pin Assignments 1 9 Table 2 1 Phase Shift Completion Times 2 13 Table 2 2 Factory Default Settings 2 53 Table 3 1 SCPI Status Commands 3 29 Table 3 2 Sample SCPI Commands 3 31 Table 3 3 Implemented IEEE 488 Subsets 3 33 Table 3 4 12000A Native Command Set 3 35 Table 4 1 Series 12000A Recommended Equipment 4 1 Table A 1 Accessories Options A 1 ...

Страница 14: ...Series 12000A Microwave Synthesizers x Publication 31231 Rev J October 2003 ...

Страница 15: ...the Series 125XXA 127XXA models 2 Front Panel Operation User s guide to the instrument s front panel All control and features are fully described for all three models 3 Remote Operation Describes how to operate the instrument from a remote location over the General Purpose Interface Bus GPIB All programming codes are presented in this chapter with various applications to aid in understanding the o...

Страница 16: ...ting of contents for the Series 12000A Changes that occur after production of this publication and Special Configuration data will be inserted as loose pages in the publication binder Please insert and or replace the indicated pages as detailed in the Technical Publication Change Instructions included with new and or replacement pages ...

Страница 17: ...ictly corrected or observed could result in injury or death of personnel An example is the proximity of high voltage Caution The CAUTION statement is enclosed with single lines and centered in the page This calls attention to a situation or an operating or maintenance procedure or practice which if not strictly corrected or observed could result in temporary or permanent damage to the equipment or...

Страница 18: ...Series 12000A Microwave Synthesizers xiv Publication 31231 Rev J October 2003 ...

Страница 19: ...ates the Series 12000A Suffix character A is the Series version Model Type 124XXA CW No Modulation 125XXA Step 127XXA Step Ramp Frequency Range 12X08A 0 01 to 8 GHz 12X20A 0 01 to 20 GHz 12X28A 2 to 8 GHz 12X22A 2 to 20 GHz Option Number If the line is blank there are no options installed Option s are installed when one or more 2 digit numbers are on the line which correspond to the option numbers...

Страница 20: ...Series 12000A Microwave Synthesizers xvi Publication 31231 Rev J October 2003 ...

Страница 21: ...maintain a permanent record of publication change data Replacement pages will be issued as a TPCI Technical Publication Change Instructions and will be inserted at the front of the binder Remove the corresponding old pages insert the new pages and record the changes here TPCI Number TPCI Issue Date Date Entered Comments ...

Страница 22: ...Series 12000A Microwave Synthesizers xviii Publication 31231 Rev J October 2003 ...

Страница 23: ...When the accompanying product has been configured for user specific application s supplemental pages will be inserted at the front of the publication binder Remove the indicated page s and replace it them with the furnished Special Configuration supplemental page s ...

Страница 24: ...Series 12000A Microwave Synthesizers xx Publication 31231 Rev J October 2003 ...

Страница 25: ...itude or Pulse Modulation The Series 124XXA is a CW ONLY Microwave Synthesizer Option 29 Scan Modulation and Option 24 Internal Modulation Generator are only available on Series 125XXA 127XXA models General Information Model 124XXA 125XXA 127XXA 1 1 1 Introduction 1 1 2 Features 1 1 3 Environmental Standards 1 1 4 Items Furnished 1 1 5 Items Required 1 1 6 Cooling v 1 1 7 Cleaning 1 1 8 Receiving ...

Страница 26: ...1231 Power Cord 6 ft P N WMPO 030007 1 1 5 Items Required No special tools are required to operate the Series 12000A Test equipment required for performance verification is described in Chapter 4 for the Series 124XXA and Section 4 4 for the Series 125XXA 127XXA within IEEE 488 Interface Cable Needed for Remote Control Operation RF Output Cabling Made to fit Female Type SMA Output Connector Order ...

Страница 27: ... reshipment by using the best packaging materials available If possible use the original shipping container If the original container is not available use a strong carton 350 lbs sq in bursting strength or a wooden box Wrap the instrument in heavy paper or plastic before placing it in the shipping container Completely fill the areas on all sides of the instrument with packaging material Take extra...

Страница 28: ...erification procedures detailed in Chapter 4 for all models including modulation related performance tests specifically for only the Series 125XXA 127XXA is found starting in Section 4 4 1 3 Inputs Outputs Input Output connector differentials between the 124XXA and 125XXA 127XXA models are illustrated in Figure 1 1 for the front panel and Figure 1 2 for the rear Table 1 2 contains the front and re...

Страница 29: ...URSOR nSec dBm dB mSec Sec m Sec STANDBY LINE REMOTE GPIB GT12000A Microwave Synthesizer Hz kHz MHz GHz 0 STATUS LOCAL STEP DATA ENTRY POWER FREQUENCY SWEEP LOCK LEVEL CW MARKER LEVEL LIST MANUAL ALC SWEEP SWEEP HELP 0 1 2 3 5 6 7 8 9 8K 4 RF OUT OUTPUT RF ON ON OFF ALC IN ALC IN SYSTEM PRESET STORE CONFIG RECALL Series 12400A Front Panel I O RF OUT OUTPUT RF ON ON OFF SYSTEM PRESET STORE CONFIG R...

Страница 30: ...elocates the connector to the rear panel See Figure 1 2 below Figure 1 2 Series 12000A Rear Panel Inputs Outputs All Models AM IN FM M IN f PULSE IN AM OUT FM OUT PM SYNC OUT PM VIDEO OUT LOCK LEVEL OUT ALC IN REF IN REF OUT TRIGGER IN TRIGGER OUT RAMP OUT 5V GHz OUT STOP SWP I O BLANK MARKER OUT RF OUT PM EXT TRIG Series 12400A Rear Panel I O Connectors AM IN FM M IN f PULSE IN AM OUT FM OUT PM S...

Страница 31: ...es Signal polarity is software controlled RF OUT RF OUT Instrument s RF output on a type SMA f connector Option 22 Moves the RF Output connector the rear panel See Appendix A for Option 22 details Option 23 For Type N connector AM IN AM IN Connector accepts the input signal from a 600 W external amplitude modulation source See Externally Supplied AM Envelope in Section 1 7 1 N A N A AM OUT An ampl...

Страница 32: ...dulation envelope waveform at TTL level Approximately 4 V P P into 50 W Internally triggered PM only OPTION 24 AVAILABLE ON 125XXA 127XXA ONLY N A ALC IN ALC IN CURRENTLY NOT SUPPORTED N A LOCK LEVEL OUT A TTL compatible output High indicates the output frequency is phase locked and the output power is leveled REF IN An external timebase input signal 5 or 10 MHz 1 10 6 or better 0 5 to 5 VP P over...

Страница 33: ...ns equipment using RS 232 format See the table below for the connector pin assignments to all models Table 1 4 EIA 232 Pin Assignments Pin Function 1 Protective Ground 2 Transmitted Data 3 Received Data 4 Request To Send 5 Clear To Send 6 Data Set Ready 7 Signal Ground 8 Carrier Detect 9 Reserved for modem testing ...

Страница 34: ... to do this could cause the instrument to float above ground posing a shock hazard DO NOT position the equipment so that is difficult to operate the disconnecting device to remove the AC line cord 1 3 4 1 Line Fuse All 12000A models have a line fuse container on the rear panel 1 3 4 2 Fuse Installation All models have a power line fuse that is 2A Slo Bo 250V Type T See Figure 1 3 below for locatio...

Страница 35: ...8A 12708A 2 GHz to 8 GHz 12428A 12528A 12728A 10 MHz to 20 GHz 12420A 12520A 12720A 2 GHz to 20 GHz 12422A 12522A 12722A Resolution 0 1 Hz Standard Accuracy Stability Identical to Timebase Oscillator Timebase Internal 10 MHz Aging Rate 5 10 10 day after 72 hours continuous oven operation Temperature Stability 2 10 10 C 0 to 55 C Timebase External 5 or 10 MHz 1 x 10 6 or better Software selected 0 ...

Страница 36: ...idual FM During Switching Refer to FM Table Wide Mode Residual Column Section 1 7 3 Phase Offset Mode Range 180 to 180 degrees Resolution 01 degrees maximum Step Size 01 to 180 degrees Accuracy Not specified This is relative mode of operation and is designed to be used interactively ...

Страница 37: ...tion 26 RF Off Attenuates the output to 140 dBm at the output connector Flatness 0 5 dB 10 dBm to maximum specified power at 25 10 C Internally Leveled CW or Frequency Step or Ramp Mode Add 0 1dB 10 dB with attenuator option 2 5 dB with Option 20 At 35 to 55 C maximum output power is 13 dBm flatness 1 dB Typical temperature coefficient is 0 025 dB per degree C See Section 1 5 3 for Option 20 limit...

Страница 38: ...Series 12000A Microwave Synthesizers 1 14 Publication 31231 Rev J October 2003 Output SWR 2 0 1 Typical Level Drift 0 05 dB hour Max 0 1 dB 24 hours ...

Страница 39: ...ffsets 300 Hz Single Sideband Phase Noise dBc Hz CW mode all power levels Freq GHz Offset from Carrier 100 Hz 1 kHz 10 kHz 100 kHz 1 MHz 0 25 101 101 109 122 129 0 5 95 95 103 122 124 2 87 92 94 120 125 4 81 86 88 110 130 6 81 83 83 110 130 8 75 80 80 105 130 10 75 80 80 105 125 18 68 73 73 97 120 20 68 73 73 97 120 Residual FM Hz rms CW Mode Frequency Range GHz Post Detection Bandwidth Hz 300 to ...

Страница 40: ...om a preset start frequency F1 through a preset sweep width F CTR FA CF F 2 FB Sweeps up or down through a preset sweep width F centered symmetrically about a preset center frequency CF Start Steps FA F1 Step Size Number of Steps FB Sweeps up or down from a preset start frequency F1 through a preset number of frequency steps Functions Auto Continuous cycle of the preset sweep Single A single cycle...

Страница 41: ...tart level L1 through a preset sweep width DL CTR LA CL DL 2 LB Sweeps up or down through a preset sweep width DL centered symmetrically about a preset center level LF Start Steps LA L1 Step Size Number of Steps LB Sweeps up or down from a preset start level L1 through a preset number of level steps Functions Auto Continuous cycle of the preset sweep Single A single cycle of the preset sweep or wi...

Страница 42: ...ns Remote Interfaces GPIB IEEE STD 488 2 GPIB all parameters except AC power on off Serial EIA RS 232 Serial Interface DB9 Connector Operating Temperature 0 to 55 C Environmental Complies with MIL PRF 28800F Class 3 Approvals CE marked Power 90 253 VAC 47 64 Hz 400 Hz optional 150 Watts Nominal Fuse Rating 2 A SB Item Benchtop Model Packed for Air Shipment Width 16 75 in 42 5 cm 24 in 60 9 cm Dept...

Страница 43: ...monics 5 dBc from 0 01 to 0 1 GHz 20 dBc for 0 1 to 20 0 GHz 20 dBm Output Power Pulse On Off PULSE ON OFF ONLY ON SERIES 12500A 12700A 60 dBc AM AM ONLY ON SERIES 12500A 12700A Functional but not specified above 0 dBm Option Activity When the option is not active the output power is reduced by 2 0 dB When active the High Power Option switches in at 11 dBm ...

Страница 44: ...tion Either up or down in frequency Sweep Ramp Shape Linear frequency ramp with respect to time Sweep Range Linear frequency ramp with respect to time Start Frequency Accuracy Phase locked to timebase via YIG tune coil Stop Frequency Accuracy Phase locked to timebase via YIG tune coil Halted Frequency Accuracy Phase locked to timebase via YIG tune coil Start Stop Freq Resolution 0 1 Hz Standard 1 ...

Страница 45: ...F MKR FA Mx My FB Sweeps up or down from a preset start frequency Mx through a preset marker My Sweep Functions Auto Continuous recycle of the preset sweep Single A single cycle of the preset sweep initiated by manual operation of the front panel push button or reception of the corresponding GPIB command EXT A single cycle of reset sweep initiated by a trigger from an external source Frequency Mar...

Страница 46: ... speed Range Resolution 2 ms to 20 ms 10 ms 20 ms to 200 ms 100 ms 200 ms to 2 sec 1 ms 2 sec to 20 sec 10 ms 20 sec to 200 sec 100 ms Minimum Sweep Width 01 dB Maximum Sweep Speed 1 dB ms Sweep Level Resolution Any Sweep Mode 0 01 dB Start Level Accuracy Any Sweep Mode 0 2 dB to Flatness Sweep Level Linearity Any Sweep Mode 0 25 dB Sweep Modes Auto Continuous recycle of preset sweep Single A sing...

Страница 47: ... 1 Amplitude Modulation AM AM may be operated simultaneously with FM AM Specifications apply with FM turned off 1 7 1 1 AM Envelope Parameters Modulation Parameters Operational Modes Model 124XXA 125XXA 127XXA 1 7 1 Amplitude Modulation AM N A 1 7 2 Scan Modulation N A 1 7 3 Frequency Modulation FM N A 1 7 4 Phase Modulation φM N A 1 7 5 Pulse Square Wave Modulation PM N A Modulation Depth 0 to 90...

Страница 48: ...ly Generated AM Envelope See Option 24 specifications in Section 1 8 1 1 7 2 Scan Modulation See Option 29 specifications in Section 1 8 2 Waveform Any waveform compatible with bandwidth considerations Scaling 0 V to 95 V Input Voltage Minimum 1 V Maximum 1 V P P for 50 depth 10 depth 1 kHz modulation rate Input Impedance 600 Ω Nominal ...

Страница 49: ...rs Maximum Deviation See table contained in Section 1 7 3 2 Minimum Deviation 10 kHz at 4 8 GHz Other ranges proportionally Modulation Resolution 1 kHz Deviation 1 MHz 10 kHz Deviation 1 MHz at 4 8 GHz other range proportionally Flatness 2 dB for rates from 100 Hz to 1 MHz 3 dB to 8 MHz Residual FM See table contained in Section 1 7 3 2 Modulation Accuracy 5 at max deviation 190 kHz modulation rat...

Страница 50: ...FM Same as CW Modulation Accuracy 5 at max Deviation 190 kHz modulation rate Distortion 0 2 MHz of Deviation Incidental AM 5 1 MHz deviation 1 10 KHz 4 8 range Frequency GHz Max Wide Deviation Pk Max Narrow Deviation Pk Wide Mode Residual FM 010 to 016 40 kHz 2 kHz 200 Hz 016 to 032 80 kHz 4 kHz 200 Hz 032 to 064 160 kHz 8 kHz 200 Hz 064 to 125 320 kHz 16 kHz 200 Hz 125 to 25 640 kHz 32 kHz 200 Hz...

Страница 51: ...pe See Option 24 specifications in Section 1 8 1 1 7 3 4 Externally Supplied FM Envelope Waveform Any waveform compatible with bandwidth considerations Rate DC to 8 MHz Input Sensitivity Settable 1 V P P for maximum Peak deviation FM deviation control set to maximum Input Impedance 50 W Nominal ...

Страница 52: ...ntained in Section 1 7 4 2 Maximum Resolution 10 kHz at 4 8 GHz other ranges proportional Modulation Resolution 01 radians at 4 8 GHz other ranges proportional Flatness 2 dB for rates from 100 Hz to 100 kHz Modulation Accuracy 5 relative to FM at max deviation 100 kHz modulation rate Distortion 5 1 MHz deviation Incidental AM 0 2 MHz of deviation Maximum Deviation See table is on next page Modulat...

Страница 53: ...16 40 radians 02 radians 016 to 032 80 radians 04 radians 032 to 064 1 6 radians 08 radians 064 to 125 3 2 radians 16 radians 125 to 25 6 4 radians 32 radians 25 to 5 12 5 radians 64 radians 5 to 1 25 radians 1 25 radians 1 to 2 50 radians 2 5 radians 2 to 4 100 radians 5 radians 4 to 8 200 radians 10 radians 8 to 16 400 radians 20 radians 16 to 20 800 radians 40 radians Waveform Any waveform comp...

Страница 54: ...Hz Settling Time to within 1 dB 75 ns for pulse width 75 ns Level Pulsed Output Accuracy Reference to CW Output Power at 25 10 C 0 5 dB 100 ns pulse width 1 dB pulse width between 100 ns and 75 ns Typical Requires a typical setup time of 100 ms after initial setting Typical Settling Time for a Series of Leveled Pulses 100 ms Demand Pulse Polarity RF will be on with TTL level demand pulse at Pulse ...

Страница 55: ...imum Width Frequency Range 20 ns 500 MHz 100 ns 64 to 500 MHz 1 ms 64 MHz Repetition Rate 5 Hz to 5 MHz leveled DC to 10 MHz unleveled Pulse Offset Delay Output Envelope Leading Edge referenced to Input Pulse Leading Edge 50 ns typical Input Pulse Required Positive or negative going TTL voltage Level trigger pulse 75 ns wide leveled output 20 ns wide unleveled output Pulse must be able to drive a ...

Страница 56: ...pecifications 1 8 1 1 Amplitude Modulation Source Supplemental Specifications Series 12500A 12700A Model 124XXA 125XXA 127XXA 1 8 1 Option 24 Specifications N A 1 8 2 Option 29 Specifications N A Waveform Sine square triangle ramp or Gaussian Noise Rate 0 01 Hz to 1 MHz all waveforms Resolution 0 01 Hz Accuracy 0 01 Hz Timebase Accuracy THD 1 Typical AM Output 2 VP P into 1 M W ...

Страница 57: ...0 01 Hz Accuracy 0 01 Hz Timebase Accuracy THD 1 Typical FM Output 2 VP P into 1 M W Rate 1 Hz to 3 MHz Rate Resolution Range Resolution 1 Hz to 1 kHz 1 Hz 1 kHz to 10 kHz 10 Hz 10 kHz to 100 kHz 100 Hz 100 kHz to 1 MHz 1 kHz 1 MHz to 3 MHz 10 kHz Accuracy 2 5 of range maximum value fm 100 KHz 4 of range maximum value fm 100 KHz to 1 MHz 10 of range maximum value fm 1 MHz Jitter Same as instrument...

Страница 58: ...Sync Output 1 8 1 5 Pulse Width Range 0 to 1 67 seconds Resolution 10 ns Accuracy 2 5 of setting or 20 ns whichever is greater Jitter 0 01 of setting or 100 ps whichever is greater Range 0 to 1 67 seconds Resolution 10 ns Accuracy 2 5 of setting or 20 ns whichever is greater Jitter 0 01 of setting or 100 ps whichever is greater ...

Страница 59: ...to a 50 W load Interval Range 100 ns to 1 67 seconds Resolution 10 ns Accuracy 2 5 of setting or 20 ns whichever is greater Jitter 0 01 of setting or 100 ps whichever is greater NOTE The interval between pulse one and pulse two and the interval between triplets and quadlets are the same The start delay for pulse one is independent Repetition Rate 5 Hz to 5 MHz Pulse Delay Set by internal delay con...

Страница 60: ...o 20 GHz Range 0 to 60 dB 10 dBm Settable to 65 dB Resolution 0 1 dB Scaling 0 dB V to 65 dB V Input Voltage Minimum 0 V Maximum 6 V Step Response 1 microsecond for 50 dB change 10 ms 1 GHz Frequency Response DC to 150 kHz sine wave Input Impedance 600 W Nominal Accuracy At cal points 0 25 dB plus 5 of depth in dB For 01 to 2 GHz specification applies only up to 30 dB and frequencies above 2 GHz i...

Страница 61: ...Introduction Publication 31231 Rev J October 2003 1 37 1 8 2 3 Internally Generated Scan AM Envelope See Specifications for Option 24 in section 1 8 1 1 8 2 4 Power 2 dB reduction in power 01 20 GHz ...

Страница 62: ...Series 12000A Microwave Synthesizers 1 38 Publication 31231 Rev J October 2003 ...

Страница 63: ...ent from a remote host computer over the General Purpose Interface Bus GPIB or an RS 232 serial connection This chapter contains the following major sections Front Panel Description Front Panel Applications 2 2 Front Panel Description The Series 12000A front panel contains the controls and display for complete local operation of the instrument Front panel controls are grouped according to function...

Страница 64: ...Series 12000A Microwave Synthesizers 2 2 Publication 31231 Rev J October 2003 Figure 2 1 Series 12000A Front Panel Layouts ...

Страница 65: ...ected it will be OFF in the Local mode Status Press STATUS to display the current operating mode frequency and level Press STATUS again to return to the previous menu or press any function key to go directly to that function Display The display is a 3 x 4 liquid crystal display LCD with 320 x 240 line resolution 0 30 mm dot pitch and a cold cathode fluorescent lamp CCFL backlight for optimum viewi...

Страница 66: ...ed after one or more numeric keys it functions as a backspace to delete the previous entry Unit Keys Press the appropriate Units key to select the units of the parameter in the display and finishes the numeric entry Any Units key can be used to complete numeric entries without units Knob Lock Key Press this key to lock disable the adjusting knob to prevent unauthorized or accidental changes Press ...

Страница 67: ...s CW to display the current frequency and to enable frequency changes Use the numeric keypad to change the frequency and the adjusting knob and or step keys to adjust the frequency in selective steps Sweep Press SWEEP to configure a frequency sweep and to select alternate sweep methods The sweep parameters can be changed while this menu is displayed In this mode the LEVEL and LOCK LEDs are not upd...

Страница 68: ...figure the operating parameters and to set the IEEE 488 address It also provides Store and Recall of up to 10 instrument setup configurations and a list of configured preset items Store Press STORE to store the current instrument setup At the prompt enter an address of 0 through 9 with current assignments and free addresses displayed Press the number 2 data entry key and the current setup is store...

Страница 69: ...Press FM to select frequency modulation FM can have a narrow bandwidth of dc to 1 MHz and a maximum deviation of 1 MHz in the 4 to 8 GHz range or FM can have a bandwidth of 100 Hz to 8 MHz and a maximum deviation of 20 MHz in the 4 to 8 GHz range FM can be internal or from an external source Internal FM is available only when Option 24 is installed fM First press FM then use the mode parameter to ...

Страница 70: ...e front panel RF connector will be relocated to the rear panel when Option 22 is installed A blinking RF ON LED indicates that RF is set to ON but there is currently no RF out This indicates that the unit has RF Retrace set to RF Off Default and is in triggered moved and is not being currently triggered If RF Retrace is set to RF On the power would remain on after trigger ceases and the RF ON indi...

Страница 71: ...ist Set Up 2 19 2 3 6 List Entry Speed Up 2 23 2 3 7 List Execution Speed Up 2 23 2 3 8 List Points Storage 2 25 2 3 9 Step Power Sweep Configuration 2 27 2 3 10 ALC Operation 2 29 2 3 11 Ramp Frequency Sweep Configuration N A 127XXA Only 2 32 2 3 12 Ramp Power Sweep Configuration N A 127XXA Only 2 34 2 3 13 External Amplitude Modulation AM N A 2 36 2 3 14 Internal Amplitude Modulation AM N A 2 37...

Страница 72: ...ion 31231 Rev J October 2003 The 12000A features a comprehensive HELP system linked to the current display Press the HELP key to display general information about the function this screen also provides softkeys selections for more detailed help topics ...

Страница 73: ...te the previous digit 2 3 1 2 Increment Decrement With the cursor positioned at the far left of the menu use the knob or step button to continuously vary the numeric value of the digits on the same line with the cursor The resolution of the steps can be changed by pressing the Step Size softkey 2 3 1 3 Individual Digit Changes With the cursor positioned at the far left use the horizontal left righ...

Страница 74: ...it to be changed and then making the change with the knob or Step keys Move the cursor to any additional digits to be changed and repeat the process To change the incremental resolution of the knob or the step keys press Step Size and select either Step x10 to increase the resolution or Step 10 to decrease the resolution In addition the step size can be entered with the keypad 2 3 2 1 Transfer To ...

Страница 75: ...twice when Change Φ by is set to 90 degrees will shift your output phase by 180 degrees Figure 2 6 Phase Adjustment Selection Figure 2 7 Phase Adjustment Selection Phase Change CWFreq 4 GHz For frequencies equal to and above 4 GHz the output phase will shift at once with no delays CWFreq 4 GHz For frequencies below 4 GHz the phase shift will be applied many times with a delay to account for freque...

Страница 76: ...ly significant digits Table 2 1 Phase Shift Completion Times Typical Time for Completion of Phase Shift CWFreq 11 MHz 11 MHz 50 MHz 500 MHz 1 GHz 2 GHz 2 GHz 4 GHz 4 GHz 8 GHz 16 GHz Φ Shift 179 º 10 º 179 º 179 º 179 º 179 º 10 º 179 º 10 º 179 º 10 º Timing 1 7 s 190 ms 420 ms 26 ms 14 ms 7 ms 680 m 375 m 375 m 375 m 375 m NOTE The phase shift increment is an approximate number Above 4 GHz the e...

Страница 77: ...alues the numeric keypad can be used also as described in Section 1 Move the cursor to highlight the specific parameter to be configured then look at the options for that parameter by pressing the up or down Step key Additional options can be selected with the softkeys to a Set up an alternate Step Frequency sweep with individual parameters as defined in this section b Set up the Step parameters 2...

Страница 78: ...hen using the Start Stop option enter the stop frequency When using the Center Span option this entry will change to Frequency Span Enter the total frequency that the sweep will span across Frequency Step Enter the value for each step of the sweep Dwell Time Enter the time the sweep will dwell at each step The dwell time does not include the transition time to arrive at the dwell point Power Level...

Страница 79: ... be set with the cursor and use the keypad to enter the frequency to assign to that marker The digits will display in the bottom window Temporarily replacing the Step Size as they are entered Press the appropriate Units key to enter the digits as the marker frequency The Step Up and Step Down keys can be used to increment and decrement the frequency value by the amount of the current step size 2 P...

Страница 80: ...me of the marker by pressing Pause Time and using the keypad to set the new time Press the appropriate Units key to activate the new value The minimum value must be 1 0 µs See Section 2 3 2 for instructions on how to copy a frequency directly from the CW Frequency menu to a marker or from a marker to the CW Frequency menu ...

Страница 81: ...y Each list point is defined by the following Frequency Power Dwell Time 2 3 5 1 LIST MODE Menu Navigation The screen is divided into 2 windows See Figure 2 10 The Switch Cursor softkey will move the cursor back and forth between the windows In the top menu use the up and down cursor keys to switch from List Table Repeat Mode and Trigger Type When the field is highlighted use the step keys to togg...

Страница 82: ...hen the front panel softkey is pressed or when a trigger command is received over the GPIB Get Event 2 3 5 5 Configuring Points In the table Pt is the heading for the respective points in the list Frequency of the point and dwell time at each point are listed in the middle while power is at the right New points can be added by pressing Add Point When adding a point it will be a duplicate of the po...

Страница 83: ...is not left on for long periods of time if the Step Attenuator is being switched Existing points can be deleted by first moving the cursor to any parameter within the point and then pressing Delete Point The cursor position identifies the point to be deleted 2 3 5 6 Edit List Edit List generates a list by specifying the Start Stop Step Dwell and Power Level The range of the individual lists can be...

Страница 84: ...op of the screen To edit the range of a list other than the one shown press Insert List enter the list number with the keypad and press any Units key If that list contains no points it will not display here Go back to the menu in Figure 2 10 and start a new list Refer to the instructions on how to configure a Step Frequency Sweep in Section 2 3 3 Figure 2 12 List 1 Range Menu ...

Страница 85: ...oint N of a list is being output by the hardware point N 1 is being compiled by the firmware The process is invisible to the user as long as the dwell times of list points are longer than their compilation time Currently about 25 ms a piece If point dwell times are lower than this value list execution will be slow At the end of a point s dwell time list execution will pause until next point s comp...

Страница 86: ...freezing it to relieve the CPU of this burden This will increase point to point switching speed by about 10 Pressing the Fast Option softkey while as list is executing activates the display mode that freezes the screen This is similar to sending a GPIB or serial command DU 8 In this display mode no display updates are performed a message appears at the bottom Fast Option is on Press LOCAL to exit ...

Страница 87: ...ble to these other aspects however only the cycling of line power is guaranteed to effect a complete replenishment Currently it is recommended that the number of object form list points be limited to 1000 The following lists of circumstances are given to help the user insure that the limit on object point quantities can be observed Events causing allocation of source form points include The adding...

Страница 88: ...IST MANUAL FREQUENCY SWEEP MARKER POWER LEVEL POWER SWEEP ALC PRESET Any of these keys will cause the 12000A to switch to the corresponding menu EXCEPT the MANUAL key The MANUAL key can be used to abort without switching menus though the display will NOT be refreshed Any data calculated before a process is aborted is valid and can be used For example if a list range calculation of 1000 points is a...

Страница 89: ...keys or the knob to toggle between options in each field For numeric values the numeric keypad can be used also as described in Section 2 3 1 1 1 Move the cursor to highlight the specific parameter to be configured then look at the options for that parameter by pressing the up or down Step key Additional options can be selected with the softkeys to a Set up a dual Frequency Power sweep b Set up th...

Страница 90: ...Enter the center value of the sweep Stop Power or Power Span When using the Start Stop option enter the stop power value When using the Center Span option this entry will change to Power Span Enter the total value that the sweep will span across Power Step Enter the value for each step of the sweep Dwell Time Enter the time the sweep will dwell at each step The dwell time does not include the tran...

Страница 91: ...elate to the setting of the instrument output power Some of the modes are optional a few are yet to be released The descriptions following detail the operation 2 3 10 1 ALC Menu without Step Attenuator Figure 2 16 Automatic Leveling Control Selection NOTE External leveling is currently not supported Figure 2 17 ALC Menu with Low Power Correction Feature ...

Страница 92: ...ing from 0 to 110 dB Once this is done the incremental power adjustment range is 20 to 20 dB This means that the instrument leveling system is effectively controlling the power from a value of 20 dBm to 20 dBm Power levels from 20 to 10 dBm may not meet the leveling accuracy specification Power levels above the specified maximum output for any given frequency may not be attainable 2 3 10 5 High Po...

Страница 93: ...he screen allows selectively applying Power Slope to different modes of instrument operation 2 3 10 7 Offset Turning on this feature will change the output power by the amount specified in the Offset Power field The displayed power level in the various menus does not change however the letters OFS will appear next to the level value to indicate the offset is active The offset can be as large as th...

Страница 94: ...at parameter by pressing the up or down Step key Additional options can be selected with the softkeys to a Set up an alternate Step Frequency sweep as detailed in Section 2 3 3 b Set up a dual Power Frequency sweep 1 Press Alt Sweep to configure a second Step or Ramp Frequency sweep that can be run alternately without having to reconfigure each time 2 Press Dual Sweep to configure and run a dual P...

Страница 95: ...requency Enter the center frequency of the sweep Stop Frequency or Frequency Span When using the Start Stop option enter the start frequency When using the Center Span option this entry will change to Center Frequency Enter the center frequency of the sweep Frequency Span Enter the value for each sweep Sweep Time Enter the total time for each sweep Power Level Set the power output level in this me...

Страница 96: ...e are no step options associated with the Ramp Power Sweep Excessive Attenuator Switching will shorten its life Option 26 There are several parameters to be setup in this application Move the cursor to highlight the specific parameter to be set then look at the options for that parameter by pressing the up or down Step key Additional options can be selected with the softkeys to set up a dual Frequ...

Страница 97: ...n using the Center Span option this entry will change to Center Power Enter the center value of the sweep Stop Power or Power Span When using the Start Stop option enter the stop value When using the Center Span option this entry will change to Power Span Enter the total value that the sweep will span across Sweep Time Enter the total time for each sweep Power Level For convenience set the sweep f...

Страница 98: ...eptance of this instrument has a bandwidth of DC to 150 kHz Scaling When using AM the scaling parameter determines the percent of modulation produced per volt of input Scaling can be changed from 0 0 to 95 0 V Depth When using the Linear AM mode the scaling parameter allows setting the depth of modulation expressed in directly if the input signal is 1 volt 2 VP P For input levels less than 1 volt ...

Страница 99: ...ve Squarewave Triangle wave Positive ramp Negative ramp Gaussian noise Modulation off Each waveform except the Gaussian noise is calibrated to have the same peak to peak value The noise output has been bandwidth limited to about 150 kHz and has an peak to peak amplitude which is approximately that of the other waveforms Selecting the Off choice removes the signal from the amplitude modulator but l...

Страница 100: ...ion 31231 Rev J October 2003 Depth Since the amplitude of the internal source is calibrated Typical for Gaussian noise the modulation depth may be set directly from the menu Modulation depth is expressed in for linear AM and dB for SCAN Logarithmic AM ...

Страница 101: ...r each volt of input Scaling can be changed from 0 0 to 65 0 dB V using the Step keys Knob or Key Pad entry Select Scan from the AMPLITUDE MODULATION screen with the AM Mode parameter highlighted by pressing the UP or DOWN Step key Example for Scan set up a Set Frequency to 3 GHz and Power Level to 10 dBm with Scaling as above at 10 0 dB V Connect 1 VDC source to the AM Input BNC on the Front or R...

Страница 102: ...Series 12000A Microwave Synthesizers 2 40 Publication 31231 Rev J October 2003 Input Voltage The AM Input BNC connector Input Voltage for Scan Modulation Logarithmic AM is 0 to 6 Volts ...

Страница 103: ...pth See below turn Scan ON by pressing the softkey next to Turn AM On softkey now changes to Turn AM Off To turn Scan OFF Press Turn AM Off softkey Waveform With Waveform highlighted use the Step Keys to select the appropriate waveform for use See 2 3 14 for Waveform selections NOTE The Default waveform is off so a waveform needs to be selected to turn Scan AM on Frequency With Frequency highlight...

Страница 104: ...y insignificant compared to the deviation as long as the input voltage is set to 1 volt peak If for example the deviation were set to 1 MHz and no modulating signal were applied the noise would be noticeable In the Wide mode the input signal bandwidth is 100 Hz to 8 MHz The maximum deviation for a 1 volt input is 20 MHz 4 8 GHz The Loop bandwidth is reduced to below 50 Hz allowing all modulation t...

Страница 105: ...the maximum deviation permitted will increase to 40 MHz 8 16 GHz or 80 MHz 16 20 GHz When using either of the Phase Modulation modes this parameter field allows setting the modulation index in radians Phase modulation has the characteristic of maintaining a constant modulation index Expressed in radians as the modulating frequency is changed This makes the deviation smaller as the modulating frequ...

Страница 106: ...r is replaced with a Deviation parameter Figure 2 26 Frequency Modulation Internal Phase Modulation Deviation Selections Waveform The Waveform parameter has the following selections Sinewave Squarewave Triangle wave Positive ramp Negative ramp Modulation off Each waveform is calibrated to have the same peak to peak value Selecting the Off choice removes the signal from the frequency modulator but ...

Страница 107: ...s with external modulation The phase modulation menu is accessed by a softkey labeled Switch to FM in the FM menu See figure on previous page The softkey label will change to Switch to FM once in FM See figure on right side above If another mode is entered and then the FM front panel key is pressed the FM FM menu previously in will be displayed The FM and FM menus On Off status wide narrow mode an...

Страница 108: ...an be achieved For example in Narrow mode the maximum deviation is 1 MHz in the 4 to 8 GHz band With an input frequency of 100 kHz this gives a modulation index of 10 radians If the input frequency is reduced to 10 kHz this same 10 radians will produce a deviation of 100 kHz In wide mode in the 4 to 8 GHz band the maximum modulation index is 200 20 MHz 100kHz For a complete table see Section 1 7 4...

Страница 109: ... the instrument RF output with a high speed high on off ratio level shift on off keying During pulse operation the RF output will be attenuated from the set level by at least 80 dB when the pulse is off Polarity This parameter determines which polarity of the input signal produces an RF output Setting the parameter to Active High means that the RF will be on when the input signal is a TTL high Ena...

Страница 110: ... pulse repetition frequency is implicitly determined by the Delay and Width parameters Each of these methods can generate the same waveform if the parameters are set appropriately For example setting a rate of 1 kHz with a width of 500 ms will produce the same waveform as setting a start delay of 500 ms and a width of 500 ms assuming a singlet pulse selection Note that this field is always in the ...

Страница 111: ...lay then the effective pulse rate will be determined by adding up the start delay the width of each pulse in the group and the gap between any pulses following the first NOTE The default waveform is off so a waveform needs to be selected to turn PM on Gap If a multiple pulse waveform is selected the spacing between pulses may be selected with this parameter The delay from the trigger to the first ...

Страница 112: ...cognize The choices are the 12000A native command set SCPI and Systron Donner emulation Line Term Line Termination this allows selection of the character that denotes the end of a command line GPIB Display This sets the display when the unit is in remote operation Choices where the display does not have to update allow fastest operation of the 12000A Out of Bounds This sets how the 12000A will res...

Страница 113: ...upport Giga tronics 8003 Precision Scalar Analyzer See the left side graphic in Figure 2 32 below The ramp sweeps are set to CONTINUOUS and IMMEDIATE by default To go from Network Analyzer to Normal mode change Interface mode to Fast this removes any delay between sweeps The screen should now appear as illustrated on the right side of Figure 2 32 Figure 2 32 System Configuration Selections Network...

Страница 114: ...nd YigCap Delay The customer settings for special NVRAM variables are preserved upon initializing NVRAM from the Preset menu during normal operation Press the PRESET button after normal boot up See Figure 2 30 Additionally the GPIB Device Address will also be preserved if initialization is done remotely during normal operation 2 3 23 2 Boot Up NVRAM Initialization Menus CheckSum Failure Menu This ...

Страница 115: ... if it fails every time AC power is totally disconnected from the unit If this is the case the unit needs to be sent back to the factory for service Power Up Preset Menu This menu below is activated at boot up by holding down the green PRESET key during power up This provides the user with the same ability to reset the NVRAM before normal boot up as the Checksum Failure and the Signature Failure m...

Страница 116: ...XXA 127XXA CW Frequency Minimum RF Power up Off RF Level 0 dBm Amplitude Modulation Off N A AM Rate Opt 24 1 kHz N A AM Mode Ext N A AM Depth 50 N A Frequency Modulation Off N A FM Rate Opt 24 1 kHz N A FM Mode Ext N A FM Deviation 5 MHz N A Pulse Modulation Off N A PM Rate Opt 24 100 kHz N A PM Mode Ext N A PM Width Opt 24 5 us N A PM Delay Opt 24 0 ns N A ...

Страница 117: ...struments which are of the same class or have the same functional capability For a given function such as frequency or power SCPI specifies the command set that is available for that function The Native syntax is a set of IEEE 488 commands developed for remote control of Giga tronics instruments Introduction Remote Operation Model 124XXA 125XXA 127XXA 3 1 1 Languages Available NOTE The unit may be...

Страница 118: ...tructure If entering more than the required letters enter the entire command e g if the command is INITiate use either INIT or INITIATE but INITI is invalid If a command is shown in square brackets it is an implied command and can be omitted The brackets are not part of the command and should be omitted even if the command itself is entered An implied command is the default command among the comma...

Страница 119: ...be preceded by a space The default units suffixes are DB for power and HZ for frequency optional parameters for frequency are KZ MZ and GZ Boolean A Boolean true or false condition Enter ON or 1 for TRUE OFF or 0 for FALSE NUM_VAL A numeric value or a qualitative term which represents a numeric value Enter Sign optional value digits decimal point optional E xx optional units suffix optional Or Ent...

Страница 120: ...e N A Description Clear Status This command clears the event registers in all status groups It also clears the Event Status Register and the Error Event Queue IDN Syntax IDN Description Identification query The response takes the form of four ASCII fields separated by commas The fields are 1 Manufacturer 2 Model 3 Serial Number and 4 Firmware Level or Equivalent Fields 1 and 2 are required fields ...

Страница 121: ...zer might generate high output power during the test When the self test is complete the synthesizer is set to the original state Self test performs a list of various frequency and power levels to assure the instrument responds normally A message Self test passed returns if no errors are found during the test or else returns the synthesizer to the frequency and power level that caused the test fail...

Страница 122: ...always 0 14 Not used always 0 13 Not used always 0 12 Not used always 0 11 Not used always 0 10 Not used always 0 9 Not used always 0 8 Not used always 0 7 0 instrument is not leveled 1 instrument is leveled 6 Not used always 0 5 Not used always 0 4 Not used always 0 3 Not used always 0 2 Not used always 0 1 0 instrument is not locked 1 instrument is locked 0 0 instrument is not calibrated 1 instr...

Страница 123: ...es the Source code may contain additional sets of functions All Source subsystem commands begin with SOURce but as SOURce is the default command at the root level it need not be entered The following SOURce subsystems are used in the 12000A SCPI SOURCe Commands Model 124XXA 125XXA 127XXA AM N A FM N A FREQuency LIST MARKer POWer PULSe N A SWEep SYSTem TRIGger ...

Страница 124: ... AM 40 Set the AM depth to 40 Description Sets the depth of Amplitude Modulation to d percent in internal mode AM INTernal FUNCtion SHAPe Syntax AM INTernal FUNCtion SHAPe OFF SINE SQUare TRIangle PRaMP NRaMP Example AM INTernal FUNCtion SHAPe OFF Set the internal AM waveform to OFF Description Allows user to assign an AM waveform from one of the following choices off sine square triangle positive...

Страница 125: ...e ramp n 6 Activate internal scan Only with Options 24 and 29 and select negative ramp n 7 Activate internal scan Only with Options 24 and 29 and select noise n 8 Activate internal scan Only with Options 24 and 29 and select zero output AM STATe Syntax AM Boolean Example AM ON or OFF Turn the AM output ON or OFF Description The command activates or deactivates the AM mode AM SOURce EXTernal Syntax...

Страница 126: ...ean Example AM TYPE LOGarithmic Select LOGarithmic AM shaping Description This command controls the AM shaping The default is LINear LINear The output voltage is directly proportional to Vmod LOGarithmic The output voltage is proportional to log Vmod EXPonential The output voltage is proportional to 10 Vmod ...

Страница 127: ...FM waveform to SINE waveform Set the FM waveform to OFF Description Allows user to assign an FM waveform from one of the following choices off sine square triangle positive ramp and negative ramp FM SENSitivity Syntax FM SENSitivity Num_Val Example FM SENSe 10 Set the FM sensitivity to 10 Hz volt Description This command controls the modulation deviation by setting a sensitivity Modulation to the ...

Страница 128: ...d activates or deactivates the FM mode FM TYPE Syntax FM TYPE Example FM TYPE Switch to another model Description It sets the mode for Frequency Modulation The available modes are Narrow and Wide mode Every time this command is executed it switches to another mode FM TYPE Syntax FM TYPE Example FM TYPE Returns the current FM mode Description This command activates or deactivates the FM mode ...

Страница 129: ... CW FIXed Syntax FREQuency Num_Val Example FREQuency 1000 Set the unit to CW frequency of 1000 HZ Description The CW or FIXed mode selects a frequency of a non swept signal Optional units in place of HZ are MIN MAX UP or DOWN The commands FREQuency CW and FREQuency FIXed are synonymous either command specifies a fixed frequency for the synthesizer FREQuency CW FIXed Syntax FREQuency Description Th...

Страница 130: ...command specifies a step size for sweeping or for UP DOWN incrementing The unit value is Hertz Optional units in place of HZ are MIN MAX UP or DOWN The commands FREQuency CW and FREQuency FIXed are synonymous either command specifies a fixed frequency for the synthesizer FREQuency CW FIXed STEP INCRement Syntax FREQuency STEP Description The is the query form to report the CW Fixed frequency step ...

Страница 131: ... is determined by FREQuency STARt STOP CENTer SPAN and MAN manual LIST The source is in the LIST sequence mode and the frequency is determined by LIST FREQuency Refer to the LIST subsystem commands in this section FREQuency SPAN Syntax FREQuency SPAN Num_Val HZ KZ MZ GZ Example FREQuency SPAN 200 MZ Set the frequency span to 200 MHz Description This command sets the sweep frequency span FREQuency ...

Страница 132: ...REQuency STOP Num_Val HZ KZ MZ GZ Example FREQuency STOP 100 MZ Set the sweep stop frequency to 100 MHz Description This command sets the STOP frequency It also sets the upper limit of a manual sweep FREQuency STOP Syntax FREQuency STOP Description This is the query command to report the STOP frequency ...

Страница 133: ...Nt n1 n2 Example LIST ADD POINt 1 1 Adds one additional point to point number 1 of list 1 Description This command adds a point to list n1 after point number n2 NOTE The first point of the list is 1 When n2 0 it inserts a point at the head of the list The frequency power dwell time and modulation start of the added points are set to a the same values as the point is inserted b the same values as t...

Страница 134: ...te values LIST DWELl POINt Syntax LIST DWELI POINt n Example LIST DWELI POINt 3 Set edit point 3 as the current editing point Description This command sets the list point n as the current editing list point before modifying the dwell time NOTE LIST DWELI POINt should execute first to indicate which list point is going to modify LIST DWELl POINt Syntax LIST DWELl POINt Description This command retu...

Страница 135: ... the power amplitude points in the lists LIST POWer POINt Syntax LIST POWer POINt n Example LIST POWer POINt 3 Description This command sets list point n as the current editing list point before modifying the power level LIST POWer POINt Syntax LIST POWer POINt Description This command returns the selected list point for power editing LIST RANGe ADD Syntax LIST RANGe ADD n Example LIST RANGe ADD 1...

Страница 136: ... the step frequency of the list range to 100 MHZ Description This command sets the step frequency for the list range to d LIST RANGe STOP Syntax LIST RANGe STOP HZ KZ KHZ MZ MHZ GZ GHZ Example LIST RANGe STOP 100 MHZ Se the stop frequency of the list range to 100 MHZ Description This command sets the stop frequency for the list range to d LIST REPeat Syntax LIST REPeat SWEEp STEP CONTinuous Exampl...

Страница 137: ...OURce Syntax LIST TRIGger SOURce BNC GPIB IMMEdiate Example LIST TRIGger SOURce GPIB Sets the trigger condition for the current list to GPIB Description This command sets the trigger condition for the current running list to one of the following sources BNC GPIB or IMMEDIATE ...

Страница 138: ...quals the output frequency If OFF only the marker output port is affected MARKer FREQuency Syntax MARKer FREQuency d HZ KZ KHZ MZ MHZ GZ GHZ Example MARKer FREQuency 100 MHZ Set the selected marker frequency to 100 MHZ Description This command sets the frequency for the specified mark to d MARKer FREQuency Syntax MARKer FREQuency Description This command returns the frequency of the currently sele...

Страница 139: ...r ALC SOURce INTernal Syntax POWer ALC SOURce INTernal DIODe PMETer Description This DIODe subsystem command directs the ALC feedback to be fed from an external diode detector The PMETer subsystem command directs the ALC feedback to be fed from a power meter DC output POWer LEVel IMMediate AMPlitude Syntax POWer Num_Val Example POWer 10 Set the unswept output signal to 10 dBm Description This comm...

Страница 140: ...mplitude is determined by the LEVel command under the appropriate subsystem SWEep The source is in the swept mode and the amplitude is determined by STARt STOP CENTer SPAN and MANual commands under the appropriate subsystem LIST The source is in the LIST mode and the amplitude is determined by the appropriate amplitude list such as LIST refer to the LIST subsystem commands in this section POWer ST...

Страница 141: ...scription This command selects the source for modulating the signal it may specify a single or multiple sources The specified sources in the command are turned on Any source from a previous selection are ignored When multiple sources are available individual INTernal sources may be distinguished by a unique numeric suffix It as suffix is not added the number 1 is assumed PULM STATe Syntax PULM STA...

Страница 142: ...ines the number of sweeps that will be enabled by a single trigger event The default count is 1 SWEep FREQuency DWELl Syntax SWEep FREQuency DWELl Num_Val Example SWEep FREQuency DWELl 10 NS Set the dwell time to 10 nanoseconds Description This command controls the amount of time spent at each point during a sweep NOTE This value cannot exceed TIME POINts SWEep FREQuency GENeration Syntax SWEep FR...

Страница 143: ...ger event The default count is 1 SWEep POWer DWELl Syntax SWEep POWer DWELl Num_Val Example SWEep POWer DWELl 10 NS Set the dwell time to 10 nanoseconds Description This command controls the amount of time spent at each point during a sweep NOTE This value cannot exceed TIME POINts SWEep POWer STEP Syntax SWEep POWer STEP Num_Val Example SWEep POWer STEP 5 Set the power step time to 5 dB Descripti...

Страница 144: ...TRIGger IMMediate Description This command initiates an immediate sweep cycle and return to IDLE when complete This command will have no effect if the cycle is set to CONTinuous TRIGger SOURce Syntax TRIGger SOURce IMMediate BUS EXTernal Example TRIGger SOURce IMM Set the TRIGger cycle to IMMediate Description This command selects the source for the event Only one source may be specified in the pa...

Страница 145: ...rm STATus OPERation EVENt none none query only CONDition none none query only ENABle NUM 255 yes PTRansition NUM 255 yes NTRansition NUM 255 yes The STATus OPERation commands relate to the registers of the operational status group STATus QUEStionable none none yes EVENt none none query only CONDition none none query only ENABle NUM 255 yes PTRansition NUM 255 yes NTRansition NUM 255 yes The STATus...

Страница 146: ...UEStionable FREQuency commands relate to the registers of the questionable frequency status group STATus PRESet none none no query The STATus PRESet command restores all parts of the status monitoring system to the power on reset condition SYSTem ERRor The SYSTem ERRor command reads the Error Event Queue TRIGger IMMediate SLOPe The trigger commands specify the execute mode the method of triggering...

Страница 147: ... OUTP OFF Turn off RF output AM STAT OFF Turn off external amplitude modulation N A AM STAT Query external amplitude modulation Sample response 0 N A POW 9 2 Set output power to 9 2 dBm POW Query output power Sample response 9 2 FM STAT OFF Turn off external frequency modulation N A FM STAT Query external frequency modulation Sample response 0 N A FREQ 6 1GHZ Set output frequency to 6 1 GHz FREQ Q...

Страница 148: ...ed Frequency Level Commands Ramp on Series 127XXA Only 3 3 6 List Mode Commands 3 3 7 Manipulating Lists via GPIB 3 3 8 Step Frequency Sweep Commands 3 3 9 Ramp Frequency Sweep Commands Series 12700A Only 3 3 10 Marker Commands 3 3 11 Step Power Sweep Commands 3 3 12 Ramp Power Sweep Commands Series 12700A Only N A 3 3 13 Amplitude Modulation Commands N A 3 3 14 Frequency Modulation Commands N A 3...

Страница 149: ...e nature and purpose of the command Some commands contain a function code and nothing else Commands consisting only of a function code are referred to in this manual as simple commands However most commands consist of a function code combined with other elements 3 3 2 2 Address Assignment The remote control address is assigned from the front panel of the instrument The available range of addresses...

Страница 150: ...ommands are unsupported Commands in the Series 12000A syntax are represented in this publication by upper case letters Some commands are followed by one or more lower case letters These letters are interpreted as follows a Indicates that alphanumeric characters are expected b Indicates that one or more 8 bit bytes entered in binary form are expected d Indicates that a decimal number is expected De...

Страница 151: ...iates BUS triggered measurements GTL Go To Local for serial port NATive Native language from anywhere LLO Local Lockout for serial port SCPI SCPI language from anywhere 12000A Native Commands A n Set ALC Mode 3 3 17 AD d Set AM depth 3 3 3 N A AK n Activate deactivate marker amplitude 3 3 10 N A AM n Activate deactivate amplitude modulation 3 3 13 N A AMF n Activate deactivate amplitude modulation...

Страница 152: ...Z MZ GZ 3 3 9 FA Set active parameter to start frequency 3 3 9 FB d Set Stop parameter HZ KZ MZ GZ 3 3 9 FB Set active parameter to stop frequency 3 3 9 FC d Set Sweep time S MS US 3 3 9 FC Set active parameter to sweep time 3 3 9 FD d Set FM deviation HZ KZ MZ GZ 3 3 14 N A FM n Activate deactivate FM 3 3 14 N A FR d Set internal FM rate HZ KZ MZ GZ 3 3 14 N A FT n Set FM mode 3 3 14 N A GA d Set...

Страница 153: ...GB d Set list range stop frequency HZ KZ MZ GZ 3 3 6 LGC d Set list range step size HZ KZ MZ GZ 3 3 6 LGD d Set list range dwell HZ KZ MZ GZ 3 3 6 LGI n Insert range as list number 3 3 6 LGL d Set list range power output DM 3 3 6 LL n n d Set list point power DM 3 3 6 LMA n n n Set list point AM status 3 3 6 N A LMF n n n Set list point FM status 3 3 6 N A LMP n n n Set list point PM status 3 3 6 ...

Страница 154: ...ncy parameter value 3 3 16 OPM n Output Marker frequency value 3 3 16 OPPL Output CW level value 3 3 16 OPSF Output CW frequency step value 3 3 16 OR Output CW level value 3 3 16 OS Output Lock and Level value in binary 3 3 16 P1 Set Repeat parameter for ramp power sweep to Continuous 3 3 12 N A 127XXA Only P2 Set Repeat parameter for ramp power sweep to Single Sweep 3 3 12 N A 127XXA Only P3 Set ...

Страница 155: ... setup 3 3 18 RF n Turn RF off or on 3 3 5 RFD n RF on off frequency change 3 3 18 RS Re start sweep Multiple S1 Set Repeat parameter for ramp freq sweep to Continuous 3 3 9 N A S2 Set Repeat parameter for ramp freq sweep to Single Sweep 3 3 9 N A 127XXA Only S3 Set Repeat parameter for ramp freq sweep to stop 3 3 9 N A 127XXA Only SC n Activate deactivate Scan modulation 3 3 13 N A SCPI Switch to...

Страница 156: ... Stop sweep and permit incremental adjustment 3 3 8 SN d Set Step count parameter 3 3 8 SP d Set CW power resolution 3 3 5 SR d Set rate for scan modulation HZ KZ MZ GZ 3 3 13 N A ST d Set ramp power and frequency sweep time S MS US 3 3 9 N A 127XXA Only ST Set GPIB active parameter 3 3 9 SV n Store setup 3 3 18 TR n Set sweep trigger Multiple TS Set sweep parameter to Single Sweep 3 3 9 UO t Upda...

Страница 157: ...ed by a description of the error If the error queue is empty the error report is 0 No error If the queue fills up the last newest error report is replaced with 350 Queue overflow IDN Syntax IDN Description The instrument identification string can be requested with this command The following string will be returned Giga tronics model number serial number version and build number such as Giga tronic...

Страница 158: ...nd sets the CW frequency to d HZ KZ MZ GZ Here d is a decimal number with possible decimal point and or exponent and HZ KZ MZ GZ is an optional terminator denoting the units in which d is expressed No terminator implies Hz NOTE If the CW command is sent with no variable the instrument will return to CW mode at the last frequency entered IF Syntax IF Example N A Description This command will increm...

Страница 159: ...oint and or exponent and DB is the terminator This resolution variable determines the increments generated by turning the knob or pressing the up down buttons SHCW Syntax SHCW d terminator Example SHCW 50 MZ Set frequency resolution to 50 MHz Description This command puts the instrument into CW mode and sets the frequency resolution to d HZ KZ MZ GZ Here d is a decimal number with possible decimal...

Страница 160: ...equencies in any arbitrary order Power level dwell and modulation parameters may be set for each frequency Refer to Section 3 3 7 for additional details List Mode Commands Model 124XXA 125XXA 127XXA Ln LA LC LD LF LGA LGB LGC LGD LGI LGL LL LR LS LT TR CURLISTNUM CURLISTPOINT L1 Syntax L1 Example N A Description This command causes the List Mode to run continuously once the LR command has been iss...

Страница 161: ...1 For Trigger In BNC trigger type the TR0 Command must follow L4 LA Syntax LA n1 n2 Example LA 2 6 Adds a point to list 2 after point number 6 Description Adds a point to list n1 after point number n2 n2 1 is the first list n2 1 is the first point in the list Set n2 0 to insert a point at the head of the list The frequency power dwell and modulation status of the added point are set to a the same ...

Страница 162: ... level may be set for the range LGA Syntax LGA d HZ KZ MZ GZ Example LGA 2 GZ Set list range start to 2 GHz Description The start frequency for the list range is set with this command LGB Syntax LGB d HZ KZ MZ GZ Example LGB 12 GZ Set list range stop to 12 GHz Description The stop frequency for the list range is set with this command LGC Syntax LGC d HZ KZ MZ GZ Example LGC 1 MZ Set list range ste...

Страница 163: ...f the TR command will determine if the List starts immediately or is triggered To stop List Mode send the CW command LS Syntax LS n Example LS 2 Set up List number 2 Description Does the calculations for list n and stores the calculated values in RAM Returns 0 when done When the pre calculated list is subsequently run the first trace will run at full speed since the instrument will not need to do ...

Страница 164: ...ondition for the current list to Softkey or GPIB Setting this trigger type stops the current list until the soft key is pressed or the GPIB GET is received at which time the list will go to its first point and begin running single sweep will take one step for each trigger The soft key trigger is supported for all repeat modes continuous single sweep and single step n 2 Sets the trigger to Immediat...

Страница 165: ... front panel s List menu s trigger softkey 2 trigger immediately The Ln command specifies the conditions that stop list execution Valid values of n and their meanings are 0 Continuous Execute the entire current list repeating it indefinitely 2 Single Sweep Execute the entire current list and then stop the next trigger will resume execution at the start of the list 4 Single Step Execute the current...

Страница 166: ...g the list trigger mode from the default mode immediate to a non immediate one e g TR 0 This will relieve the 12000A s firmware of the burden of repeatedly terminating and relaunching list execution in response to each command s arrival leaving it free to devote itself entirely to command processing After the list points are manipulated and their lists precompiled the trigger mode can be changed a...

Страница 167: ...nt dwell times are lower than this value list execution will be slow At the end of a point s dwell time list execution will pause until next point s compilation is completed If Config Retrace is set to RF Off then RF will be blanked during this period If List Repeat Mode is set to Single Step trigger events may be missed To enable real time execution of lists with short dwell times the 12000A cont...

Страница 168: ... involved Instead of simply issuing an LR n command for a given list it is necessary to issue the LS n read bus LR n sequence e g 1 Add edit list 2 s points 2 Add edit list 7 s points 3 Issue LS 2 wait read bus 4 Issue LS 7 wait read bus 5 Issue LR 7 6 Execute list 7 via whatever triggering 7 Issue LS 2 read bus LR 2 8 Execute list 2 via whatever triggering 9 Issue LS 7 read bus LR 7 10 Execute li...

Страница 169: ...e next page may replenish this pool to a state suitable to these other aspects however only the cycling of line power is guaranteed to effect a complete replenishment Currently we recommend that the number of object form list points be limited to 1000 The following lists of circumstances are given to help the user insure that the limit on object point quantities can be observed Events causing allo...

Страница 170: ...ally saved in nonvolatile memory The workaround is as follows 1 Create a single point list having a fairly long dwell time and suitable power and frequency e g LA 100 0 LT 100 1 10 S 2 Issue an LR n command for the list e g LR 100 3 Change the list trigger mode to immediate e g TR 2 L1 4 Wait a moment 5 Change the list trigger mode to a non immediate form e g L2 TR 0 This workaround procedure shou...

Страница 171: ...y sweeping mode If a step frequency sweep was not running starts it running if it was running restarts the sweep NOTE The various sweep parameters e g start stop dwell must have been previously set D2 Syntax D2 Example N A Description Puts step frequency sweep into single sweep mode If a step frequency sweep was not running starts it running if it was running restarts the sweep NOTE The various sw...

Страница 172: ...ncy a decimal number with possible decimal point and or exponent and HZ KZ MZ GZ is the units in which the frequency is expressed No terminator implies Hz If a step frequency sweep was not running starts it running if it was running restarts the sweep NOTE If the GB command is sent with no variable it makes the step frequency sweep stop frequency the active variable If a step frequency sweep was n...

Страница 173: ...restarts the sweep RS Syntax RS Example N A Description This command restarts the current Sweep or List mode The sweep is interrupted and reset to the start frequency All other parameters remain unchanged SM Syntax SM Example N A Description The SM command is only meaningful if a sweep is in process When received the sweep is interrupted and manual control knob keypad or up down buttons of the fre...

Страница 174: ...The BNC trigger is supported for all repeat modes continuous single sweep and single step n 1 Sets the trigger condition for the current list to Softkey or GPIB Setting this trigger type stops the current list until the soft key is pressed or the GPIB GET is received at which time the sweep will go to its starting condition and begin running single sweep will take one step for each trigger The sof...

Страница 175: ...Syntax AU Example N A Description This command automatically sets the sweep time to the shortest possible using the start and stop frequencies as the determining parameters Since the instrument uses a frequency division scheme for frequencies below 4 GHz the shortest allowable sweep times are a function of the division in use CF Syntax CF d Hz KZ MZ GZ Example CF 4 GZ Activates Ramp Sweep with a 4...

Страница 176: ...rts it running if it was running restarts the sweep FB Syntax FB d HZ KZ MZ GZ Example FB 8 GZ Set the Ramp Frequency stop to 8 GHz Description Sets the stop frequency for a Ramp Frequency Sweep to d HZ KZ MZ GZ where d is the frequency a decimal number with possible decimal point and or exponent and HZ KZ MZ GZ is the units in which the frequency is expressed No terminator implies Hz If a Ramp Fr...

Страница 177: ...p NOTE The various sweep parameters e g start stop time must have been previously set S3 Syntax S3 Example N A Description This command stops the Ramp Frequency Sweep The frequency may now be adjusted manually SG Syntax SG Example N A Description Puts Ramp Frequency Sweep into single sweep mode If a Ramp Frequency Sweep was not running starts it running if it was running restarts the sweep NOTE Th...

Страница 178: ...rent list to Softkey or GPIB Setting this trigger type stops the current sweep until the soft key is pressed or the GPIB GET is received at which time the sweep will go to its starting condition and begin running single sweep will take one step for each trigger The soft key trigger is supported for all repeat modes continuous single sweep and single step n 2 Sets the trigger to Immediate i e no tr...

Страница 179: ...op in the RF output power to occur at marker frequencies M0 Syntax M0 Example N A Description This command deactivates the marker that was last activated M n d Syntax M n d HZ KZ MZ GZ Example M 5 7 2 GZ Activates marker 5 at 7 2 GHz Description Each of the eight available markers may individually be activated and set to a particular frequency using this command To turn off a particular marker fir...

Страница 180: ...ters i e start stop dwell must have been previously set Q2 Syntax Q2 Example N A Description Puts Step Power Sweep into a single sweeping mode If a step power sweep was not running starts it running if it was running restarts the sweep NOTE The various sweep parameters i e start stop dwell must have been previously set QA Syntax QA d DM Example QA 2 DM Set the Step Power Sweep start to 2 dBm Descr...

Страница 181: ...its terminator If a Step Power Sweep was not running starts it running if it was running restarts the sweep If the QC command is sent with no variable it makes the Step Power Sweep step size the active variable If a Step Power Sweep was not running starts it running if it was running restarts the sweep QD Syntax QD d S MS US Example QD 5 MS Set the Step Power Sweep dwell to 5 ms Description Sets t...

Страница 182: ...er The BNC trigger is supported for all repeat modes continuous single sweep and single step n 1 Sets the trigger condition for the current sweep to Softkey or GPIB Setting this trigger type stops the current sweep until the soft key is pressed or the GPIB GET is received at which time the sweep will go to its starting condition and begin running single step will take one step for each trigger The...

Страница 183: ... A PS N A RS N A TR N A P1 Syntax P1 Example N A Description Puts Ramp Power Sweep into continuously sweeping mode If a Ramp Power Sweep was not running starts it running if it was running this command restarts the sweep NOTE The various sweep parameters e g start stop time must have been previously set P2 Syntax P2 Example N A Description Puts Ramp Power Sweep into single sweep mode If a Ramp Pow...

Страница 184: ...ommand starts it running and if it was running restarts the sweep If the PB command is sent with no variable it makes stop power the active variable If a Ramp Power Sweep was not running the PB command starts it running and if it was running restarts the sweep PC Syntax PC d S MS US Example PC 5 MS Set the Ramp Power Sweep time to 5 ms Description Sets the time for a Ramp Power Sweep to d S MS US ...

Страница 185: ... trigger is supported for all repeat modes continuous single sweep and single step n 1 Sets the trigger condition for the current sweep to Softkey or GPIB Setting this trigger type stops the current sweep until the soft key is pressed or the GPIB GET is received at which time the sweep will go to its starting condition and begin running single step will take one step for each trigger The soft key ...

Страница 186: ...le AM 1 Activate external AM Description Sets the trigger condition for the current sweep as specified by the value n n 0 Deactivate turn off Amplitude Modulation n 1 Activate external Amplitude Modulation n 2 Activate internal Amplitude Modulation Only with Option 24 and select sine wave n 3 Activate internal Amplitude Modulation Only with Option 24 and select square wave n 4 Activate internal Am...

Страница 187: ...n off Scan Amplitude Modulation n 1 Activate external Scan Amplitude Modulation Only with Option 29 n 2 Activate internal Scan Amplitude Modulation Only with Options 24 and 29 and select sine wave n 3 Activate internal Scan Amplitude Modulation Only with Options 24 and 29 and select square wave n 4 Activate internal Scan Amplitude Modulation Only with Options 24 and 29 and select triangle wave n 5...

Страница 188: ...de Modulation to d dB NOTE The AM source needs to be set prior to using this command since the external depth and internal depth are independent variables SR Syntax SR d HZ KZ MZ GZ Example SR 400 HZ Set the internal AM rate to 400 Hz Description Sets the rate of the internal amplitude modulation generator to d HZ KZ MZ GZ This command is valid only with Options 24 and 29 ...

Страница 189: ... Phase then this command sets the deviation in Radians with any units key the terminator FM Syntax FM n Example FM 1 Activate External FM Description Activates and selects the source of the FM according to the following values for n NOTE This command applies to Narrow Wide and Phase modes See the FT command n 0 Deactivate turn off Frequency Modulation n 1 Activate external Frequency Modulation n 2...

Страница 190: ...tor to d Hz KZ MZ GZ This command is valid only with Option 24 FT Syntax FT n Example FT 1 Set the FM to Narrow mode Description This command sets the mode for Frequency Modulation The following modes are available for the value of n 1 Narrow mode 2 Wide mode NM Syntax NM Example N A Toggle to the next FM mode Description This command sets the FM mode to the next type Available types are Narrow Wi...

Страница 191: ...lation n 1 Activate external positive true Pulse Modulation n 2 Activate internal Pulse Modulation Only with Option 24 n 3 Activate external negative true Pulse Modulation n 4 Activate external rising edge trigger Pulse Modulation Only with Option 24 n 5 Activate external falling edge trigger Pulse Modulation Only with Option 24 PR Syntax PR d HZ KZ MZ GZ Example PR 500 KZ Set PM rate to 500 kHz D...

Страница 192: ...y between pulses doublet triplet quadlet generated by the internal pulse modulation generator where d is the time a decimal number with possible decimal point and or exponent and S MS US is the units terminator This command requires Option 24 to be installed PY Syntax PY d S MS US Example PY 5 MS Set PM delay to 5 ms Description Sets the delay for an externally triggered or internally generated PM...

Страница 193: ...mmands causes the instrument output buffer to be loaded with the desired result The remote controller must then do a read to obtain the data Output Commands Model 124XXA 125XXA 127XXA OA OC OD OI OPAS OPCF OPCW OPDF OPFA OPFB OPM OPPL OPSF OR OA Syntax OA Example OA Response Returns a string showing the value of the active variable Response Example 9000000000 0 Frequency of 9 GHz Description Whene...

Страница 194: ...Example 1 1 1 0 0 Description This command outputs the results of instrument self test See SHM4 The self test steps the instrument across its frequency range and checks for lock and level at each step The OD command must be sent following self test to send the string OI Syntax OI Example OI Description This command outputs the instrument s identification OPAS Syntax OPAS d Example N A Description ...

Страница 195: ...rns a string containing the start frequency of a sweep Response Example 2500000000 0 A start frequency of 2 5 GHz Description When the instrument is operating in a Frequency Sweep mode this command will output the value of the sweep start frequency OPFB Syntax OPFB Example OPFB Response Returns a string containing the stop frequency of a sweep Response Example 6500000000 0 A start frequency of 6 5...

Страница 196: ...aining the center frequency of a sweep Response Example 100 0 A step size of 100 Hz Description When the instrument is operating in a Frequency Sweep mode this command will output the value of the sweep center frequency OR Syntax OR Example OR Response Returns a string containing the value of the output power in dBm Response Example 15 3 An output power of 15 3 dBM Description The value of the cur...

Страница 197: ...yntax AT d DB Example AT80DB Sets the attenuator to 80 dB Description Sets the attenuator independently of the level control in 10 dB increments from 0 to 110 dB To use this command the attenuator must first be uncoupled from the level control by sending SHSL When using this command the level control can independently adjust the input level to the step attenuator from at least 10 to 15 dBm with th...

Страница 198: ...scription This mode disables the automatic level control It is included for compatibility with older Hewlett Packard Agilent instruments SHSL Syntax SHSL d DB Example SHSL80DB Sets the attenuator to 80 dB Description Sets the attenuator independently of the level control in 10 dB increments from 0 to 110 dB When using this command the level control can independently adjust the input level to the s...

Страница 199: ...A Description Clears the 16 bit status bytes that report the instrument status DN Syntax DN Example N A Description Decreases the value of the active parameter by its step size If for example the last command sent to the instrument was CW5GZ then the CW frequency parameter will be the active parameter If the step size for the CW frequency was 100 MHz then sending DN will decrease the frequency by ...

Страница 200: ...dentified The LED below the PULSE key toggles when a GPIB command is sent to the unit EF Syntax EF Example N A Description Disables the front panel knob to prevent inadvertent parameter changes EK Syntax EK Example N A Description Enables the front panel knob IH Syntax IH Example N A Description Clears all lists level correction tables and setups from non volatile memory writes zeros to the cleare...

Страница 201: ...FD1 will disable this feature and leave the RF on at all times except band and filter crossing points Sending RFD0 re enables the normal operation SHM4 Syntax SHM4 d HZ KZ MZ GZ Example SHM4 100MZ Run Self Test in 100 MHz steps Description Activates Self Test and allows setting the step size to d HZ KZ MZ GZ where d is the frequency increment a decimal number with possible decimal point and or exp...

Страница 202: ...as CW5GZ then the CW frequency parameter will be the active parameter If the step size for the CW frequency was 100 MHz then sending UP will increase the frequency by 100 MHz Equivalent to pressing the Up Button CONTRAST d Syntax Contrast d Example Contrast 128 Description Sets the LCD Contrast to the integer value specified by d 0 d 255 CONTRAST Syntax Contrast Example Contrast Description Return...

Страница 203: ...vided the specifications are sufficiently compatible Introduction Performance Verification Model 124XXA 125XXA 127XXA 4 1 1 Recommended Equipment Table 4 1 Series 12000A Recommended Equipment Equipment Example Frequency Standard 10 MHz Stanford Research FS 725 Oscilloscope Tektronix TDS3052B or Equivalent Microwave Frequency Counter XL Microwave 3260 or Equivalent Power Meter and Sensor Giga troni...

Страница 204: ...ompatible A test data sheet is included for entering the various readings taken The specification and tolerance range is listed for ease of verification It is suggested that copies be made of the manual sheets When automated tests are run a printed data sheet is produced Performance verification is recommended at least every two years or more often when required to ensure proper operation of the i...

Страница 205: ...counter input using the coaxial cable and the SMA to BNC adapter Allow the equipment to warm up for at least 30 minutes Because the 12000A and the counter use the same timebase timebase errors are eliminated The 12000A will automatically switch to the external reference when it is connected 2 Set the 12000A to 10 MHz Press LEVEL in the POWER field and enter 1 0 DBM Press RF ON in the RF OUTPUT fie...

Страница 206: ...adually narrow the span keeping the signal centered to observe any spurious signals Use appropriate resolution and video bandwidths to allow sufficient dynamic range 4 Repeat steps 2 and 3 for the other frequencies on the test data sheet which are within the operating range of the instrument Many spectrum analyzers have a tuned preselector when the frequency is above about 2 GHz This reduces the l...

Страница 207: ...entify the particular class of spurious signal as the specifications may be different for each If the spurious signal is an exact multiple of the 12000A RF output then the harmonic specification applies Any other spurious signals must meet the non harmonically related specification For frequencies above the fundamental range of the spectrum analyzer either a mixer supplied with the spectrum analyz...

Страница 208: ...t Place the 12000A on a foam pad to isolate it from any external mechanical vibrations which could affect the phase noise measurement 2 Turn off all modulation on the 12000A 3 For the first frequency on the test data sheet within the range of the instrument press CW and enter the frequency Tune the spectrum analyzer to the generator frequency and adjust the 12000A RF level to obtain a reference of...

Страница 209: ... 4 2 5 2 Equipment Required UUT Local Oscillator Measuring Receiver Sensor Downconverter Plotter Computer Programs 4 2 5 3 Procedure Output Power 1 Connect the power sensor to the 12000A Disable the leveling system of the 12000A Step the frequency across the particular instrument operating range in 50 MHz increments At each point measure the power apply the appropriate sensor correction factor and...

Страница 210: ...he receiver in a tuned RF level mode Reduce the 12000A output in 10 dB steps observing and recording the receiver reading As needed perform the recalibration requested by the receiver 2 Repeat this procedure for the remaining test frequencies Figure 4 5 RF Output Power Attenuator Test NOTE When measuring the flatness and accuracy of the model 12000A consideration must be given to the various measu...

Страница 211: ...aining sections describe the adjustments that occur at power up or when certain modes are selected and the factory calibration processes The equipment required to perform user initiated calibration consists of 1 a known accurate 5 or 10 MHz source 2 a Giga tronics 8540 or 8650 Universal Power Meter with an 80313A or equivalent power sensor 3 a 1 00 to 6 00 Vdc source this source can be a stable po...

Страница 212: ... calibration associated with the amplitude control system The first determines the relationship between the actual output power and the detector output voltage Data is taken for each of the internal detectors and at each of the various gain settings in the input amplifier The data is stored as coefficients to an equation which describes the detector characteristic The second set of data determine ...

Страница 213: ...ent of the oscillator with no need to manually set up the tracking During CW and Step Sweep instrument operation the PLL control voltage is monitored by an ADC If the voltage exceeds a narrow window around zero volts the instrument computer automatically adjusts the coarse tune DAC in 1 bit steps to maintain the loop voltage within the window This process occurs slowly and does not affect the inst...

Страница 214: ...leveling operation over the specified temperature range the instrument uses a set of data tables that are generated during normal instrument test These data tables are a multi dimensional array at various temperatures levels and detectors There are sensors located adjacent to each detector to determine the temperature used by the computer for compensation purposes ...

Страница 215: ...s Performance Tests Series 12500A 12700A Model Page 124XXA 125XXA 127XXA 4 4 1 Amplitude Modulation Test N A 4 14 4 4 2 Frequency Modulation Test N A 4 16 4 4 3 Pulse Modulation On Off Ratio Test N A 4 19 4 4 4 Pulse Modulation Rise Fall Time Test N A 4 20 4 4 5 Pulse Modulation Overshoot Settling Time N A 4 21 4 4 6 Pulse Modulation Accuracy Test N A 4 22 NOTE Units that have Option 24 will have ...

Страница 216: ... dB pad 2 Connect LO Source output to the Mixer Box LO input connector Set LO frequency to 130 MHz higher than UUT and set source leveled output to 10 dBm 3 Connect Direct output of Mixer Box to the HP 8902 Measuring Receiver RF input 4 Connect Modulation Output Audio Input to channel 2 of Oscilloscope a Set to 500 mV per Division 5 On Measuring Receiver press FREQUENCY and verify 130 MHz on recei...

Страница 217: ...t each step 12 Enter data in the AM Modulation Test AM Depth area of the Series 12000A Microwave Synthesizers Performance Verification Data Sheet Section 4 4 1 3 4 4 1 4 Procedure AM Bandwidth 1 Set UUT to 1 5 GHz with level set at 0 dBm Set AM Depth to 50 1 KHz rate Sinewave 2 Verify a 50 reading on HP 8902 with filters turned off On receiver press RATIO then the LOG LIN button display indicates ...

Страница 218: ...e assembled The recommended FM test fixture includes an RF splitter two lines of unequal length and an RF mixer The RF output of the 12000A is divided by the splitter into two signals unequally delayed Different length cables determine the number of frequency nulls or 0 volt outputs found in the frequency band of interest For the Frequency Modulation performance test the frequency band of interest...

Страница 219: ...duce invalid test results Identifying an optimal frequency null is achieved by sweeping the frequency through the frequency range of the test and observing the Delay Discriminator waveform on an oscilloscope Recommended Test Equipment FM Delay Discriminator Digital Oscilloscope Pulse Generator with 1 shot Capability BNC Cables and Tee Recommended Configuration 1 Connect the input of the delay disc...

Страница 220: ...uency between 4 0 and 7 99 GHz that is at a frequency where the mixer output voltage is zero 10 dBm out no modulation 2 Establish the voltage at 1 MHz above and 1 MHz below the null frequency Adjust the oscilloscope gain and the 12000A output power level near 5 dBm to place the null point at the center of the screen and the 1 MHz deviation points at 3 divisions above and 3 divisions below the null...

Страница 221: ...lation PM on the 12000A 3 Tune the analyzer to the source frequency select an analyzer span of 0 Hz and fine tune the analyzer to place the line at the top of the screen graticule adjust analyzer reference level as needed 4 Set the pulse generator for a 100 Hz square wave press PULSE then use the softkey to turn on the pulse modulation 5 Adjust the analyzer sweep time to display a few cycles of th...

Страница 222: ...nt 3 Enable external pulse modulation at a 1 MHz rate and 0 5 µs width on the 12000A Press PULSE and use the softkey to turn on pulse modulation 4 Set the oscilloscope to 5 mV div and using the RF Level control of the 12000A adjust the peak to peak oscilloscope display to fall on the dotted lines on the screen 100 and 0 Adjust the oscilloscope sweep time to 5 ns div Measure and record the rise and...

Страница 223: ... and the vertical position of the oscilloscope adjust the peak to peak oscilloscope display to be from the top of the screen pulse off to 2 divisions below the center line pulse on Adjust the oscilloscope sweep time to 50 ns div Change the level setting of the 12000A by plus and minus 1 dB and note the graticule position of the pulse on level Return to the original value Measure and record the tim...

Страница 224: ... the oscilloscope to 5 mv div and using the vertical position of the oscilloscope adjust the trace to the centerline of the screen Change the level setting of the 12000A by plus and minus 1 dB and note the trace position on the screen Return to 0 dBm 4 Enable external pulse modulation at a 200 kHz rate and 0 1 µs width on the 12000A Press PULSE and use the softkey to turn on pulse modulation 5 Mea...

Страница 225: ...onverting FM ADC bits to DDS bits Once the DDS is calibrated it provides a precise shift in the loop control voltage This voltage is null ed using an internal voltage previously calibrated by the 1 Vdc source The gains and offsets required to produce the null become the calibration factors for the high band 4 5 2 Amplitude Modulation Calibration The calibration of the Amplitude Modulation function...

Страница 226: ...n the instrument automatically performs a calibration of the modulator at whatever output frequency has been selected Whenever either the frequency power level or both are to be changed the preferred procedure is to switch the AM function off make whatever frequency and or power level changes are desired then switch AM function back on This technique provides the best possible accuracy for SCAN ov...

Страница 227: ...ce Frequency Range Resolution Accuracy 4 2 2 3 Frequency Harmonics 12 MHz 24 MHz 48 MHz 100 MHz 200 MHz 400 MHz 750 MHz 1500 MHz 3 GHz 6 GHz 12 GHz 18 GHz Spurious Signals Tests 4 2 3 3 Frequency MHz Harmonics Non Harmonics 770 550 1513 425 4004 000 9182 433 17361 522 Single Sideband Phase Noise dBc Hz 4 2 4 3 Frequency MHz Offset from Carrier 100 Hz 1 kHz 10 kHz 100 kHz 1 MHz 1513 425 4004 000 91...

Страница 228: ...inewave Square Wave Triangle Wave Frequency 10 GHz Int Ext Int Ext Int Ext Sinewave Square Wave Triangle Wave AM Bandwidth Spec 3 dB Int Ext 4 4 1 4 Frequency 1 5 GHz Frequency 10 GHz Frequency Modulation Test SERIES 12500A 12700A ONLY Parameter 1 GHz 4 GHz 12 GHz 20 GHz 4 4 2 3 Deviation 5 7 6 3 div Bandwidth 5 7 div Bandwidth 4 8 div Deviation 5 7 6 3 div Bandwidth 5 7 div Bandwidth 4 8 div Puls...

Страница 229: ...le Kit SMA 29847 N A A002 Rack Mount with Slides 29901 Yes A003 Rack Mount without Slides 29902 Yes A010 Extra Operation Manual 31231 N A Series 12000A Service Manual 31232 N A A011 Ruggedized Carrying Case 29855 N A 20 High Power RF Output SEE SECTION 1 5 3 FOR OPTION LIMITATIONS THAT APPLY TO ONLY THE SERIES 124XXA MODEL 29884 Yes 22 Rear Panel RF Out 29888 Yes 23 Type N RF Output Connector 2989...

Страница 230: ...it for mounting the Series 12000A in a standard equipment rack The kit does not include mounting slides The kit is available from Giga tronics with part number 29902 A 2 4 A010 Operation Manual Use part number 31231 to order additional copies of the instrument s Operation manual Use part number 31232 to order the Series 12000A Microwave Synthesizers Service Manual A 2 5 A011 Ruggedized Carrying Ca...

Страница 231: ... Option 22 Rear Panel RF Output Connector Option 22 provides the RF output connector which is relocated to the Series 12000A s rear panel if installed Option 22 can be installed with or without Option 26 A 3 3 Option 23 Type N RF Output Connector Option 23 changes the RF output connector to Type N if installed A 3 4 Option 24 Internal Modulation Generator Option 24 provides two built in function g...

Страница 232: ...ed A 3 5 Option 26 Step Attenuator 20 GHz Instruments Option 26 provides an attenuator which is placed in the RF output path of the instrument providing up to 110 dB of attenuation in 10 dB increments This option has been incorporated into the main body of the publication a procedure or specification applies only to instruments with this option where a note to that effect is included A 3 6 Option ...

Страница 233: ...n the form of V07X BXX XX where V07X can be either V072 or V073 Verify the version firmware currently installed by turning on the 12000A and observing the version firmware number on the start up screen If your code is V073 then proceed to download the latest version firmware following the instructions on the Giga tronics website after Download Registration If the instrument firmware version is V07...

Страница 234: ...Series 12000A Microwave Synthesizers B 2 Publication 31231 Rev J October 2003 ...

Страница 235: ...libration 4 9 4 23 AM Calibration 4 23 Factory Calibrations 4 12 FM Calibration 4 23 Mode Related Calibrations 4 24 Output Amplitude Calibration 4 10 Timebase Calibration 4 10 Change Output Phase 2 13 Check Sum Failure Menu NVRAM 2 52 Cleaning 1 3 Command Syntax 3 33 Computer Interface 1 8 EIA 232 1 9 GPIB 1 8 Configuring Points 2 20 Conventions xiii Cooling 1 3 CPU Busy Clock 2 26 D Direct Entry ...

Страница 236: ...Interface Configuration 2 50 Network Analyzer Settings 2 51 Interface Connectors Rear Panel 1 8 Internal AM 2 37 Internal Amplitude Modulation AM 2 37 Internal Frequency Modulation Internal FM 2 44 Internal Modulation Opt 24 w Scan AM Opt 29 Selected 2 41 Internal PM 2 48 Internal Pulse Modulation 2 48 Internally Generated PM Envelope 1 31 Introduction 1 1 Accessories Options A 1 Cleaning 1 3 Feat...

Страница 237: ...Pulse Modulation Overshoot Settling Time 4 21 Pulse Modulation Rise Fall Time Test 4 20 RF Output Power Tests 4 7 Single Sideband Phase Noise 4 6 Spurious Signals Tests 4 4 Performance Verification Calibration 4 9 4 23 Instrument Self Adjustment During Power Up 4 11 Performance Tests 4 2 4 13 Recommended Equipment 4 1 Phase Modulation fM 1 28 2 46 External Supplied FM Envelope 1 29 Narrow Mode Env...

Страница 238: ...al Configurations xix Specifications 1 11 1 20 CW Operation 1 11 Ramp Frequency Sweep 1 20 Ramp Power Sweep 1 22 RF Output 1 13 Spectral Purity 1 15 Step Frequency Sweep 1 16 Step Power Sweep 1 17 Spurious Signals Tests 4 4 Step Frequency Sweep 1 16 Step Frequency Sweep Commands 3 55 Step Frequency Sweep Configuration 2 15 Step Frequency Sweep Parameters 2 16 Step Frequency Sweep Parameters 2 16 S...

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