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Mirrex_PPR125_ENG维修说明书手册含电气原理图.pdf

发布:2025-04-13约5.95千字共4页下载文档
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PPR-125ALIGNMENT(EPT012510B)

1.0TESTEQUIPMENT

1.Oscilloscope(50MHz)6.FrequencyCounter(100MHz)

2.DCPowerSupply(13.8V,10A)7.MultiMate(digital)

3.DeviationMeter8.DistortionMeter

4.AudioSignalGenerator9.SpectrumAnalyzer

1.1PLLSYNTHESIZER/OSCILLATORFREQUENCYALIGNMENT

ITEMCONNECTSSETTINGADJUSTMEASUREMENT

VCOSetradiotoCH1AMRXmode.L90.11VDC

VOLTAGEconnectvoltmetertoR75

ConnectOscilloscopetoJP45L15

SetradiotoCH19AMRXmode.VC110.24000MHz

ConnectFrequencycounter

AMFREQSetRadiotoCH19AMRXmode16.49000MHz±20Hz

ConnectFrequencycountertoL8

1.2TRANSMITTERALIGNMENT

1

ITEMCONNECTSSETTINGADJUSTMEASUREMENT

TXSetRadioCH19AMTXmode

Conn

POWERJack

SetradiotoCH40.AMTXmode

SetradiotoCH1.AMTXmode

AMSetradiotoCH19.AMTXmodeL173.8W

TXPOWERNOMOD0.3W±0.2W

AMSetradiotoCH19.AMTXmodeVR490%

MODULATIONAudiosignal30mV,1KHztoMICMeter90%

S/RFMETERMeterswitchtoS/RFposition..thetop

1.3RECEIVERALIGNMENT

2

ITEMCONNECTSSETTINGADJUSTMEASUREMENT

SENSITIVITYRFgainfullyclockwise,SQatL1,2,3,4,5S/N10dB

MIN,VOLcontrolat20clock.

ConnectRFSGtoANTjack

Frequency27.185MHzMOD30%

0.5uV.c

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