Operating hours, Frequency standard selection | VXI 3002 guide

STATUS BYTE

Operating hours

These commands enable you to find out either the total operating hours or the elapsed operating hours since the last reset, as well as to reset the elapsed time to zero.

ELAPSED

:RESET

Data type :

Allowed suffices :

Default suffix :

Example:

ELAPSED?

Example:

OPER?

Reset elapsed operating hours to zero

None

None

None

ELAPSED:RESET

Prepares message containing information on elapsed operating hours since last reset in the following format:

<nr2>

454.50

Prepares message containing information on total operating hours in the following format:

<nr2>

Example: 1453.00

Frequency standard selection

These commands enable you to select a 10 MHz output to provide a standard for use with associated equipment, as well as enabling you to select a standard (either external or internal) for use by the instrument. When an external standard is selected, the internal TCXO is locked to the external standard using a phase locked loop. In this case, you can select between direct and indirect. When direct is selected the internal standard for the RF tray is provided directly from the external standard. When indirect is selected this standard is provided from the TCXO locked to the external standard. You should select direct if your provided standard is better than that fitted in the instrument.

FSTD

FSTD?

Data type :

Allowed suffices : Default suffix :

Examples:

Example:

Select internal or external frequency standard

Character program data (any one of INT, EXT10DIR, EXT1IND, EXT10IND or INT10OUT)

None

None

FSTD INT

FSTD EXT10IND

Prepares message containing information on frequency standard selection in the format:

:FSTD <char>

:FSTD EXT10IND

Reading error messages

This command enables the error messages to be read off the error queue in the order that they occurred.

ERROR?	Prepares message relating to the next error in the error queue in the
	following format:
	<nr1>, <string>
	Where <string> is a descriptive error message. The numeric value
	returned is either that of the next error number or 0 if the queue is empty
	or 399 if the queue is full
Example:	100,"Carrier Limit"

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Image 59

VXI 3002 manual Operating hours, Frequency standard selection, Reading error messages

Contents

3002 3002 Chapter Intended audienceStructure Document conventions Contents Patent protection Preface Electrical hazards DC supply voltage SymbolsSymbol Description General conditions of use Beryllium copper Fire hazardToxic hazards Beryllia Suitability for use Installation Sécurité électrique tension d’alimentation continue Symboles signalant un risqueSymbole Nature du risque Conditions générales d’utilisation Utilisation Risque lié au feuLe Béryllia Bronze au bérylliumPage Elektrische Schläge Gleichspannungsversorgung GefahrensymboleSymbol Gefahrenart Allgemeine Hinweise zur Verwendung Beryllium Kupfer BrandgefahrWarnung vor giftigen Substanzen Beryllium Oxid Simbolo Tipo di pericolo Simboli di pericoloCondizioni generali d’uso Pericoli da elettricità alimentazione a c.c Rame berillio Pericolo dincendioPericolo sostanze tossiche Berillio Caratteristiche d’uso Símbolo Naturaleza del peligro Símbolos de peligroCondiciones generales de uso Nivel peligroso de electricidad tensión de alimentación DC Berilio-cobre Peligro de incendioAviso de toxicidad Berilio Idoneidad de uso Introduction ContentsMain features Chapter Triggers IncrementingFrequency sweep Memory Performance data Pulse Modulation Phase ModulationFrequency Modulation FSK Frequency Standard Sweep ModeInternal LF Generator External Modulation Input Compatibility Versions, options and accessoriesSafety Electromagnetic Qualifying Notes SafetyCertificate Ref. No. DC230 Reference No Title Ventilation requirements Setting logical addressList of figures Initial visual inspection Rectification Installing in VXI mainframeRoutine safety testing and inspection Visual inspection Putting into storage CleaningFront panel connectors and indicators Disk installation/loading instructions Switching on Device talking elements IntroductionDevice listening elements Compound headers ProgrammingProgram messages Mnemonic Common commands and queries IeeeProgram data Message exchange protocol OPC Device dependent commands Instrument default settings Default settings CFRQ? Carrier frequencyCfrq Rflv RF level RFLVOFFS? RFLV?RFLVLIMIT? OUTPUT? Output controlOutput MODE? Modulation modeValid Mode Combinations Table Mode MOD? Modulation controlMOD FM or FM1 or FM2 Frequency modulation and FSK FMMODF? or FM1MODF? or FM2MODF? Dcfmnl PM or PM1 or PM2 Phase modulation PMMODF? or PM1MODF? AM or AM1 or AM2 Amplitude modulation AM? or AM1? or AM2? PULSE? Pulse modulationPulse Full store Memory storesMemory store Carrier store Memory-recall Recalling default settings Memory sequencing Memory erase MTRIG? Memory triggeringMemory protection Mtrig SWEEPCFRQ? Sweep operationSweep SWEEP? Sweep mode Sweep control Halt Cont Reset Retn Xfer TRIGGERSOURCE? Trigger sourceSources Trigger Atten RF level Atten. lock Setting dBm Min. dBm Max. dBm FromAttenuator hold Attenuator lock ranges Reverse power protection Power-up options Frequency standard selection Reading error messagesOperating hours Status byte Status data structure register model ESE ESE? Standard event registers HSE? Hardware event registers CSE? Coupling event registers SSE SSE? Instrument event registers Queue flag details Error Queue SRE SRE? Status byte when read by *STB? Service Request Generation Service Request Enable Register# Status byte when read by serial poll Summary of status reporting commands and queries Error queue Error handlingBackground errors Foreground errors Background errors 500 599 in priority order Error Messages Foreground errors 0 Ieee 488.2 errors 400 Control ModulationFrequency generation Block schematic diagram Test precautions Acceptance Testing Executable soft front panel software Recommended test equipment Test equipment SpecificationDescription Minimum specification Example RF output ALC linearity Test procedureRF level frequency response Measuring Attenuator accuracy Counter Carrier frequency accuracy Spectrum analyzer Spectral purityHarmonics Residual FM Non-harmonics SSB phase noise test set-up SSB phase noise FM deviation and distortion Internal FM FM scale shape Hz to 100 kHz Carrier errorExternal FM frequency response ALC off, DC coupled Hz DC External FM frequency response ALC on Phase modulation flatness Phase modulation Figure recorded in 5 20 log10 Figure recorded AM depth and distortion External AM frequency response ALC off, DC coupled Test procedure Hz to 30 kHzAM scale shape DVM 10 Pulse modulation test set-up Pulse modulation RF level frequency response Function generator Pulse modulation on/off ratio Pulse modulation rise and fall time Modulation oscillator Modulation oscillator distortion and LF output flatness Modulation oscillator frequencies 15 External standard test set-up External frequency standard input RF output at −4 dBm For 3002 Signal Generator, serial number RF output at +7 dBm +19 dBm RF output at +25 dBm RF level dBm RF level min DBm Result dBm RF level max ALC linearity at 2.5 MHz ALC linearity at 950 MHz ALC linearity at 1200 MHz ALC linearity at 1900 MHz ALC linearity at 2400 MHz RF level dBm RF level min Result dBm RF level max DBm Attenuator test at 2.6 MHz 10 Attenuator test at 480.1 MHz 11 Attenuator test at 1199 MHz 12 Attenuator test at 1875.1 MHz 13 Attenuator test at 2399 MHz Frequency MHz Frequency min Result MHz Frequency max 14 Carrier frequency tests 15 Carrier harmonic tests at −4 dBm 16 Carrier harmonic tests at +7 dBm 17 Carrier harmonic tests at +13 dBm 18 Carrier harmonic tests at +19 dBm Carrier frequency Residual FM Measured value Hz RMS 21 SSB phase noise test19 Carrier non-harmonic tests 20 Residual FM test FM deviation kHz Result kHz Min. kHz Max. kHz 23 FM scale shape tests at 15 MHz carrier Carrier error Result kHz 24 Carrier error test at 1.2 GHz, FM deviation 100 kHz 10.5 31 Internal AM depth and distortion tests at +7 dBm 29 Internal ΦM flatness test30 Internal AM depth and distortion tests at −4 dBm 33 Internal AM depth and distortion tests at +19 dBm 32 Internal AM depth and distortion tests at +13 dBm AM depth % AM depth min Result % Max. % 34 AM scale shape test 38 Pulse modulation RF output at −7 dBm 39 Pulse modulation RF output at +4 dBm Pulse modulation on/off ratio test 40 Pulse modulation RF output at +14 dBm 45 External frequency standard tests Modulation oscillator frequency tests44 Modulation oscillator distortion and LF output tests Operation Acceptance testingAnnex a General description Spectrum analyzer Test procedure Annex-A-3 Table A-1 Pulse mod. RF output at −7 dBm Table A-2 Pulse mod. RF output at +0 dBm Table A-3 Pulse mod. RF output at +16 dBm Result ns Table A-4 Pulse modulation on/off ratio testTable A-5 Pulse modulation rise and fall time test Software Licence and Warranty Indemnity China Beijing Email info-test@aeroflex.comChina Shanghai UK Stevenage