Chapter 4
TRANSCEIVER PERFORMANCE TESTING
1.0
General
These radios meet published specifications through their manufacturing process by utilizing high-
accuracy laboratory-quality test equipment. The recommended field service equipment approaches
the accuracy of the manufacturing equipment with few exceptions. This accuracy must be
maintained in compliance with the manufacturer’s recommended calibration schedule.
2.0
Setup
Supply voltage is provided using a 13.2Vdc power supply. The equipment required for alignment
procedures is connected as shown in the Radio Tuning Test Setup Diagram, Chapter 5, Figure 5-4.
Initial equipment control settings should be as indicated in Table 4-1. The remaining tables in this
chapter contain the following related technical data:
Table Number
Title
4-2
Test Environments
4-3
Test Channel Spacing
4-4
Test Frequencies
4-5
Transmitter Performance Checks
4-6
Receiver Performance Checks
Table 4-1 Initial Equipment Control Settings
Service Monitor
Test Set
Power Supply
Monitor Mode: Power Monitor
Spkr set: A
Voltage: 13.2Vdc
RF Attn: -70
Spkr/load:
Speaker
DC On/Standby:
Standby
AM, CW, FM: FM
PTT: OFF
Volt Range: 20V
Oscilloscope Source: Mod
Oscilloscope Horiz: 10mSec/Div
Oscilloscope Vert: 2.5kHz/Div
Oscilloscope Trig: Auto
Monitor Image: Hi
Monitor BW: Nar
Monitor Squelch: mid CW
Monitor Vol: 1/4 CW
Current: 20A
Содержание GM140
Страница 1: ...Professional Radio GM300 Series Basic Service Manual 68P64115B51 Issue July 2000 ...
Страница 16: ...2 6 MODEL CHART AND TEST SPECIFICATION ...
Страница 44: ...5 4 RADIO TUNING AND PROGRAMMING ...
Страница 46: ...6 2 POWER UP SELF TEST ...