2.1 Digital Modulation Technology...............................................................................................28
2.2 Voice Compression Technology............................................................................................ 28
2.3 Transceiver............................................................................................................................ 28
2.3.1 Digital Section.......................................................................................................... 29
2.3.2 Transmitter Path...................................................................................................... 29
2.3.3 Receiver Path.......................................................................................................... 29
2.3.4 Frequency Generating Section................................................................................ 30
2.4 Bluetooth Section...................................................................................................................30
2.5 Global Navigation Satellite System Section...........................................................................30
Chapter 3: Programming the Radio........................................................................31
Chapter 4: Test Setup and Testing..........................................................................32
4.1 Typical Test Setup................................................................................................................. 32
4.1.1 Assembly Procedures.............................................................................................. 34
4.1.2 Disassembly Procedures......................................................................................... 36
4.2 Flashing Mode....................................................................................................................... 38
4.2.1 Connecting the Radio in Blank Flash Mode.............................................................39
4.2.2 Connecting the Radio in USB-C/Norm Mode...........................................................40
4.2.3 Connecting the Radio in UART Mode......................................................................41
4.3 Test Check List...................................................................................................................... 42
4.3.1 Transmitter Tests..................................................................................................... 43
4.3.2 Call Processing Tests.............................................................................................. 43
4.3.3 Duplex Test..............................................................................................................44
4.4 Configuring IFR 3901/IFR 3902/IFR 3920 Setup...................................................................44
4.5 Configuring IFR 3901/IFR 3902/IFR 3920 Setup for Japan radios........................................45
4.6 Configuring IFR 2968 Setup.................................................................................................. 46
4.7 Configuring IFR 3901/IFR 3902/IFR 3920 Manual Screen Test............................................48
4.8 Configuring IFR 2968 Manual Screen Test........................................................................... 48
4.9 RF Tests................................................................................................................................ 49
4.9.1 Testing Receiver using IFR 3901/IFR 3902/IFR 3920............................................. 49
4.9.2 Testing Receiver using IFR 2968.............................................................................49
4.9.3 Testing Transmitter using IFR 3901/IFR 3902/IFR 3920......................................... 50
4.9.4 Testing Transmitter using IFR 2968.........................................................................50
4.10 Call Processing Tests.......................................................................................................... 51
4.10.1 Talk Back using IFR 3901/IFR 3902/IFR 3920...................................................... 51
4.10.2 Talk Back using IFR 2968......................................................................................51
4.10.3 Call to Mobile......................................................................................................... 51
4.11 Digital Duplex Test (Tx) using IFR 3901/IFR 3902/IFR 3920.............................................. 52
4.12 Digital Duplex Test (Tx) using IFR 2968..............................................................................52
4.13 Manual Mode Testing.......................................................................................................... 53
MN002952A01-AH
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