Motorola APX 4000 Basic Service Manual

Chapter 5 Performance Checks
This chapter covers performance checks used to ensure that the ASTRO APX 2000/ APX 4000 (Two
Knobs) radio meets published specifications. The recommended test equipment listed in the
previous section approaches the accuracy of the manufacturing equipment, with a few exceptions.
Accuracy of the test equipment must be maintained in compliance with the manufacturer’s
recommended calibration schedule. Checks should be performed if radio performance degradation
is suspected.
5.1 Test Equipment Setup
Supply voltage can be connected from the battery eliminator. The equipment required for the
performance checks is connected as shown in Figure 5-1.
Figure 5-1. Performance Checks Test Setup
BNC
NOT USED
AUDIO GENERATOR
SINAD METER
AC VOLTMETER
TX
RX
30 dB PAD
30 dB PAD
RF GENERATOR
SYSTEM ANALYZER
OR COUNTER
WATTMETER
BATTERY
ADAPTER
66012031001
TRANSMIT
RECEIVE
POWER
SUPPLY
RADIO
PROGRAM/TEST CABLE
PMKN4013_
AUDIO IN
SET TO APPROX. 8mV FOR Tx
MEASURE 3.74Vrms FOR Rx
SMA-BNC
5880384G68
TEST SET
RLN4460_

Motorola APX 4000 Specifications

General

IP Rating	IP67
Operating Temperature	-30°C to +60°C
GPS	Optional
Frequency Range	VHF: 136-174 MHz, UHF: 380-470 MHz, 450-520 MHz
Power Output	VHF: 1-5W; UHF: 1-4W
Digital Protocol	APCO P25
Dimensions	5.2 x 2.4 x 1.5 inches (without battery)