Codan-radio MT-4E Analog and P25 Digital - Maintenance Guide Uživatelský manuál stáhnout pdf (Strana 8)

MAINTENANCE GUIDE | MT-4E ANALOG & P25 DIGITAL RADIO SYSTEMS

Page vi

Chapter 5: Codan Radio System Testing ............................. 17

MT-4E Testing with the IFR 2975 by Aeroﬂ ex ..........................................17

General Set-Up and Connections ............................................................18

Uploading Codan Conﬁ gurations to the IFR 2975 .........................................18

Radio Service Software (RSS) ......................................................................19

Control Cards ................................................................................................19

Adapters, Cables and Extender Cards ..........................................................19

Codan MT-4E Radio System Test Sheet .......................................................19

Turning OFF the MT-4E Receiver and Transmitter Modules .........................20

Audio Connections ........................................................................................21

System Regulator Testing ........................................................................ 22

System Voltage Testing .................................................................................22

Receiver Testing .......................................................................................23

Receiver Analog Testing ................................................................................23

Receiver Digital Testing .................................................................................28

Receiver Bit Error Rate Testing .....................................................................30

Receiver RF Preselector Alignment and Tuning ............................................32

Receiver Reference Oscillator Adjustment ....................................................34

Transmitter Testing ...................................................................................37

Transmitter Analog Testing ............................................................................37

Transmitter CTCSS Testing ...........................................................................42

Transmitter Digital Testing .............................................................................45

Transmitter Modulation Fidelity Testing .........................................................47

Transmitter Reference Oscillator Adjustment ................................................49

System Testing .........................................................................................51

Duplex Analog Testing ...................................................................................51

Duplex Digital Testing ....................................................................................54

Chapter 6: Additional Radio System Tests ........................... 57

Radio System Testing Through Filtering Equipment ................................ 58

Radio System Testing with the Antenna Connected ................................ 59

VSWR ............................................................................................................59

Receiver Desense .........................................................................................60

RF Carrier Signal Levels on Links between Sites .........................................61

Spurious Signals over the Air ........................................................................62

Chapter 7: Blank Worksheets .............................................. 63

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Codan-radio MT-4E Analog and P25 Digital - Maintenance Guide Uživatelský manuál Strana 8