Motorola EP450 Transmitter Alignment Options, Initial Test Equipment Control Settings

Radio Alignment Procedures: Transmitter Alignment Options 5-3

5.3.1Initial Test Equipment Control Settings

The initial test equipment control settings are listed in Table 5-1.

Table 5-1. Initial Equipment Control Settings

Service Monitor	Test Set	Power Supply
Monitor Mode: Power Monitor	Speaker set: A	Voltage: 13.2 Vdc
RF Attenuation: -70	Speaker/load:	DC on/standby:
	Speaker	Standby
AM, CW, FM: FM	PTT: OFF	Volt Range: 20 V
Oscilloscope Source: Mod		Current: 20 A
Oscilloscope Horizontal: 10 mSec/Div
Oscilloscope Vertical: 2.5 kHz/Div
Oscilloscope Trigger: Auto
Monitor Image: Hi
Monitor BW: Nar
Monitor Squelch: mid CW
Monitor Volume: 1/4 CW

5.4Transmitter Alignment Options

Note: When checking the RF power output of the radio with a test set, always use a pad of at least 30 dB attached to the radio end of the RF cable. This will avoid an RF mismatch and ensure a stable RF reading that will not change with varying lengths of connecting cable.

5.4.1Reference Oscillator Warp

This is an important operation which affects all deviation values such as DTMF, MDC-1200 Signaling etc. The frequency will drift if not warped properly. Perform this operation prior to all other transmit tuning operations in order to minimize heating and because of the impact of warp on signaling operations.

Figure 5-3. Reference Oscillator Warp Window

HKLN4215A December 3, 2003