Motorola EP450 service manual RF Test Mode, Service Monitor Test Set Power Supply

4-2 Performance Checks: RF Test Mode

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 (Figure 4-1).

Initial equipment control settings should be as indicated in Table 4-1and should be the same for all performance checks and tuner alignment procedures.

Table 4-1. Initial Equipment Control Settings

Service Monitor	Test Set	Power Supply
Monitor Mode: Power Monitor	Spkr set: C	Voltage: 7.5 Vdc
RF Attenuation: -70	Spkr/load:	DC on/standby:
	Load	Standby
AM, CW, FM: FM	PTT: OFF	Volt Range: 10 V
Oscilloscope Source: Mod		Current: 2.5 A
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

4.3RF Test Mode

When the EP450 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 code plug 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.

Side Button 1

Side Button 2

		P2
P1
		3
	2	6
1	5	9
4	8	#
7	0
*

Figure 4-2. Side Button Locations

December 3, 2003 HKLN4215A