Transceiver Performance Testing; Introduction; Setup - Motorola Expert Series Basic Service Manual

Chapter 4

Transceiver Performance Testing

4.1

Introduction

These radios have been manufactured to meet published specifications through their manufacturing
process, with the use of laboratory-quality test equipment of highest accuracy. The recommended
field service equipment approaches the accuracy of the manufacturing equipment with a few
exceptions.
Accuracy of the equipment must be maintained in compliance with the manufacturer's recommended
calibration schedule.
4.2

Setup

Supply voltage can be connected from the battery eliminator. The equipment required for alignment
procedures is connected as shown in the Radio Tuning diagram (Figure 5-1 on page 5-2).
Initial equipment control settings should be as indicated in the following table and should hold for all
alignment procedures except as noted in Table 4-1.
Monitor Mode: Power Monitor
RF Attn: -70
AM, CW, FM: FM
O'scope Source: Mod
O'scope Horiz: 10mSec/Div
O'scope Vert: 2.5kHz/Div
O'scope Trig: Auto
Monitor Image: Hi
Monitor BW: Nar
Monitor Squelch: mid CW
Monitor Vol: 1/4 CW
Table 4-1 Initial Equipment Control Settings
Service Monitor Test Set Power Supply
Spkr set: A Voltage: 7.5Vdc
Spkr/load: DC on/standby:
Speaker Standby
PTT: OFF Volt Range: 10V
Current: 2.5A
4-1