Testing Transmitter Using Ifr 3901/Ifr 3902/Ifr 3920; Testing Transmitter Using Ifr 2968 - Motorola ST7000 Basic Service Manual

MN002952A01-AH
Chapter 4: Test Setup and Testing
4.9.3

Testing Transmitter using IFR 3901/IFR 3902/IFR 3920

Procedure:
1 To select RF Settings, press TAB.
2 Enter -90 for RF Gen level.
3 Switch ON the RF Gen.
4 Switch OFF the Pre Amp.
5 Press PTT.
NOTICE: Press and hold the PTT to read the results.
Monitor the Tx Measurement window which displays the Power Profile, Burst Timing, Vector
Peak, Vector RMS, Freq Error, and Residual Carrier.
Burst Power Required Results: 28.0–32.0 dBm (Class 4) or 30.5–34.5 dBm
(Class 3L)
Power Profile: Passed
Burst Timing: ± 0.25 Symbols
Vector Error: Max 10% RMS, Max 30% Peak, Max 5% residual
Frequency Error: ± 100 Hz
6 Press TAB to select Operations/Status.
7 Press Call Mobile → Group Call → Cleardown.
4.9.4

Testing Transmitter using IFR 2968

Procedure:
1 Press RF Gen Level. Enter -90 dBm and press RF Gen Level.
2 Press PTT.
NOTICE: Press and hold the PTT to read the results.
Monitor the IFR Manual Test screen which displays the Power Profile, Burst Timing, Vector
Peak, Vector RMS, Freq Error, and Residual Carrier.
Burst Power Required Results: 28.0–32.0 dBm (Class 4) or 30.5–34.5 dBm
(Class 3L)
Power Profile: Passed
Burst Timing: ± 0.25 Symbols
Vector Error: Max 10% RMS, Max 30% Peak, Max 5% residual
Frequency Error: ± 100 Hz
3 Press Clear Down to proceed with other tests.
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