Dvm | VXI 3002 specification

0 Hz (DC)

To measure the AM depth at DC, it will be necessary to use the DC offset facility on the function generator proceeding as follows:

		UUT	6960B
		UUT	RF power meter
			RF power meter
Function generator		RF
		OUT
OUTPUT	EXT MOD	6912
OUTPUT	INPUT	6912	SENSOR
Temporary		Power	INPUT
Temporary	50 Ω	sensor
connection	50 Ω	sensor
	load
DVM
			C2566

Fig. 5-9 0 Hz external AM and distortion test set-up

(9)Connect the test equipment as shown in Fig. 5-9.

(10)Set the function generator to +1.4142 V DC (temporarily connect the function generator output to the DVM and set this voltage as close as possible to +1.4142 V).

(11)Measure the power on the power meter.

P1 _____

(12)Set the function generator to −1.4142 V DC (temporarily connect the function generator output to the DVM and set this voltage as close as possible to −1.4142 V).

(13)Measure the power on the power meter.

P2 _____

(14) Subtract P2 from P1 (= x).

(15) Calculate the modulation depth using the formula:

1-10(-x/20)

AM(%) =

1+10(-x/20)

(16)Calculate the 0 Hz response relative to 1 kHz using the following formula, recording the result in Table 5-35:

Figure recorded in (6) 20 log10 Figure recorded in (15)

(17)Set the UUT RF level to +7 dBm and repeat (10) to (16) using Table 5-36.

(18)Set the UUT RF level to +13 dBm and repeat (10) to (16) using Table 5-37.

5-17

Image 92

VXI 3002 manual Dvm

Contents

3002 3002 Intended audience StructureDocument conventions Chapter Contents Preface Patent protection Symbols Symbol DescriptionGeneral conditions of use Electrical hazards DC supply voltage Fire hazard Toxic hazardsBeryllia Beryllium copper Installation Suitability for use Symboles signalant un risque Symbole Nature du risqueConditions générales d’utilisation Sécurité électrique tension d’alimentation continue Risque lié au feu Le BérylliaBronze au béryllium UtilisationPage Gefahrensymbole Symbol GefahrenartAllgemeine Hinweise zur Verwendung Elektrische Schläge Gleichspannungsversorgung Brandgefahr Warnung vor giftigen SubstanzenBeryllium Oxid Beryllium Kupfer Simboli di pericolo Condizioni generali d’usoPericoli da elettricità alimentazione a c.c Simbolo Tipo di pericolo Pericolo dincendio Pericolo sostanze tossicheBerillio Rame berillio Caratteristiche d’uso Símbolos de peligro Condiciones generales de usoNivel peligroso de electricidad tensión de alimentación DC Símbolo Naturaleza del peligro Peligro de incendio Aviso de toxicidadBerilio Berilio-cobre Idoneidad de uso Contents Main featuresChapter Introduction Incrementing Frequency sweepMemory Triggers Performance data Phase Modulation Frequency ModulationFSK Pulse Modulation Sweep Mode Internal LF GeneratorExternal Modulation Input Frequency Standard Versions, options and accessories SafetyElectromagnetic Compatibility Safety Certificate Ref. No. DC230Reference No Title Qualifying Notes Setting logical address List of figuresInitial visual inspection Ventilation requirements Installing in VXI mainframe Routine safety testing and inspectionVisual inspection Rectification Putting into storage CleaningFront panel connectors and indicators Switching on Disk installation/loading instructions Device talking elements IntroductionDevice listening elements Compound headers ProgrammingProgram messages Common commands and queries Ieee Program dataMessage exchange protocol Mnemonic Device dependent commands OPC Default settings Instrument default settings CFRQ? Carrier frequencyCfrq RF level Rflv RFLVOFFS? RFLV?RFLVLIMIT? OUTPUT? Output controlOutput Modulation mode Valid Mode Combinations TableMode MODE? MOD? Modulation controlMOD Frequency modulation and FSK FM or FM1 or FM2 Dcfmnl FMMODF? or FM1MODF? or FM2MODF? Phase modulation PM or PM1 or PM2 PMMODF? or PM1MODF? Amplitude modulation AM or AM1 or AM2 AM? or AM1? or AM2? PULSE? Pulse modulationPulse Memory stores Memory storeCarrier store Full store Recalling default settings Memory-recall Memory erase Memory sequencing Memory triggering Memory protectionMtrig MTRIG? SWEEPCFRQ? Sweep operationSweep Sweep mode SWEEP? Halt Cont Reset Retn Xfer Sweep control Trigger source SourcesTrigger TRIGGERSOURCE? RF level Atten. lock Setting dBm Min. dBm Max. dBm From Attenuator holdAttenuator lock ranges Atten Power-up options Reverse power protection Frequency standard selection Reading error messagesOperating hours Status byte Status data structure register model Standard event registers ESE ESE? Hardware event registers HSE? Coupling event registers CSE? Instrument event registers SSE SSE? Error Queue Queue flag details Status byte when read by *STB? SRE SRE? Status byte when read by serial poll Service Request Generation Service Request Enable Register# Summary of status reporting commands and queries Error handling Background errorsForeground errors Error queue Error Messages Background errors 500 599 in priority order Foreground errors 0 Ieee 488.2 errors 400 Control ModulationFrequency generation Block schematic diagram Acceptance Testing Test precautions Recommended test equipment Executable soft front panel software Specification Description Minimum specification ExampleRF output Test equipment ALC linearity Test procedureRF level frequency response Attenuator accuracy Measuring Carrier frequency accuracy Counter Spectrum analyzer Spectral purityHarmonics Non-harmonics Residual FM SSB phase noise SSB phase noise test set-up Internal FM FM deviation and distortion FM scale shape Hz to 100 kHz Carrier errorExternal FM frequency response ALC off, DC coupled External FM frequency response ALC on Hz DC Phase modulation Phase modulation flatness AM depth and distortion Figure recorded in 5 20 log10 Figure recorded External AM frequency response ALC off, DC coupled Test procedure Hz to 30 kHzAM scale shape DVM Pulse modulation RF level frequency response 10 Pulse modulation test set-up Pulse modulation on/off ratio Function generator Modulation oscillator Pulse modulation rise and fall time Modulation oscillator frequencies Modulation oscillator distortion and LF output flatness External frequency standard input 15 External standard test set-up For 3002 Signal Generator, serial number RF output at −4 dBm RF output at +7 dBm RF output at +25 dBm +19 dBm ALC linearity at 2.5 MHz RF level dBm RF level min DBm Result dBm RF level max ALC linearity at 950 MHz ALC linearity at 1200 MHz ALC linearity at 1900 MHz ALC linearity at 2400 MHz Attenuator test at 2.6 MHz RF level dBm RF level min Result dBm RF level max DBm 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 14 Carrier frequency tests Frequency MHz Frequency min Result MHz Frequency max 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 21 SSB phase noise test 19 Carrier non-harmonic tests20 Residual FM test Carrier frequency Residual FM Measured value Hz RMS 23 FM scale shape tests at 15 MHz carrier FM deviation kHz Result kHz Min. kHz Max. kHz 24 Carrier error test at 1.2 GHz, FM deviation 100 kHz Carrier error Result 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 32 Internal AM depth and distortion tests at +13 dBm 33 Internal AM depth and distortion tests at +19 dBm 34 AM scale shape test AM depth % AM depth min Result % Max. % 38 Pulse modulation RF output at −7 dBm 39 Pulse modulation RF output at +4 dBm 40 Pulse modulation RF output at +14 dBm Pulse modulation on/off ratio test 45 External frequency standard tests Modulation oscillator frequency tests44 Modulation oscillator distortion and LF output tests Acceptance testing Annex aGeneral description Operation Test procedure Spectrum analyzer 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 Email info-test@aeroflex.com China ShanghaiUK Stevenage China Beijing