Rf Test Mode; Figure 4-2. Side Button Locations; Table 4-1. Initial Equipment Control Settings - Motorola PR400 Basic Service Manual

4-2
Supply voltage can be connected from the battery eliminator. The equipment required for alignment
procedures is connected as shown in the Radio Performance Checks Setup diagram
Initial equipment control settings should be as indicated in
performance checks and tuner alignment procedures.
Monitor Mode: Power Monitor
RF Attenuation: -70
AM, CW, FM: FM
Oscilloscope Source: Mod
Oscilloscope Horiz: 1 0 mSec/Div
Oscilloscope Vert: 2.5kHz/Div
Oscilloscope Trig: Auto
Monitor Image: Hi
Monitor BW: Nar
Monitor Squelch: mid CW
Monitor Vol: 1/4 CW
4.3

RF Test Mode

When the PR400 radio is operating in its normal environment, the radio's microcomputer controls the
RF channel selection, transmitter key-up, and receiver muting, according to the customer codeplug
configuration. However, when the unit is on the bench for testing, alignment, or repair, it must be
removed from its normal environment using a special routine, called RF TEST MODE. This mode
allows bench testing of the radio at various test frequencies across the entire band, at both high and
low transmit power (if applicable), at various channel spacings, and with different coded or carrier
squelch types. Any customer specific programming in the radio will not be changed or affected by use
of the RF Test Mode..
July, 2004

Table 4-1. Initial Equipment Control Settings

Service Monitor
Side Button 1
Side Button 2

Figure 4-2. Side Button Locations

Performance Checks: RF Test Mode
Table 4-1 and should be the same for all
Test Set Power Supply
Spkr set: A Voltage: 7.5 Vdc
Spkr/load: DC on/standby:
Speaker Standby
PTT: OFF Volt Range: 10 V
Current: 2.5 A
P 2
P 1
3
2
6
1
5
9
4
8
#
7
0
*
(Figure 4-1).
6881096C24-A