Motorola ASTRO SPECTRA Service Manual

Table of Contents v
6881076C20-E February 3, 2003
3.9.1 VHF Radios ...................................................................................................................... 3-6
3.9.2 UHF and 800 MHz Radios................................................................................................ 3-6
3.10 Command Board............................................................................................................................ 3-6
3.11 VOCON (Vocoder/Controller) Board.............................................................................................. 3-7
3.11.1 ASTRO Digital Spectra.....................................................................................................3-7
3.11.2 ASTRO Digital Spectra Plus............................................................................................. 3-7
Chapter 4 Test Equipment, Service Aids, and Tools......................... 4-1
4.1 Recommended Test Equipment .................................................................................................... 4-1
4.2 Service Aids and Recommended Tools......................................................................................... 4-2
4.3 Field Programming Equipment ...................................................................................................... 4-5
4.3.1 ASTRO Digital Spectra..................................................................................................... 4-5
4.3.1.1 ASTRO Digital Spectra W3 Smart RIB Issue .......................................................... 4-6
4.3.1.2 ASTRO Digital Spectra Remote W3 Y Cable .......................................................... 4-6
4.3.2 ASTRO Digital Spectra Plus............................................................................................. 4-7
4.3.2.1 ASTRO Digital Spectra Plus Model W3................................................................... 4-7
Chapter 5 Performance Checks .......................................................... 5-1
5.1 Introduction.................................................................................................................................... 5-1
5.2 Test Setup ..................................................................................................................................... 5-1
5.2.1 ASTRO Digital Spectra..................................................................................................... 5-1
5.2.2 ASTRO Digital Spectra Plus............................................................................................. 5-2
5.3 Test Mode...................................................................................................................................... 5-2
5.3.1 Entering Test Mode .......................................................................................................... 5-2
5.3.2 RF Test Mode................................................................................................................... 5-3
5.3.3 Control Head Test Mode................................................................................................... 5-5
5.4 Receiver Performance Checks...................................................................................................... 5-6
5.5 Transmitter Performance Checks.................................................................................................. 5-7
Chapter 6 Radio Alignment Procedure............................................... 6-1
6.1 Introduction.................................................................................................................................... 6-1
6.2 RSS ............................................................................................................................................... 6-1
6.2.1 ASTRO Digital Spectra..................................................................................................... 6-1
6.2.2 Softpot .............................................................................................................................. 6-2
6.2.3 Reference Oscillator Alignment ........................................................................................ 6-3
6.2.4 Transmit Power Alignment................................................................................................ 6-4
6.2.5 Transmit Current Limit Alignment ..................................................................................... 6-6
6.2.6 Transmit Deviation Balance (Compensation) Alignment .................................................. 6-7
6.2.7 Transmit Deviation Limit Alignment .................................................................................. 6-8
6.2.8 Bit Error Rate (BER) Performance Check ...................................................................... 6-10
6.3 ASTRO Digital Spectra and Digital Spectra Plus Tuner Software............................................... 6-10
6.3.1 Radio Information ........................................................................................................... 6-14
6.3.2 Reference Oscillator Alignment ...................................................................................... 6-14
6.3.3 Transmit Power Alignment.............................................................................................. 6-16
6.3.4 Transmit Current Limit Alignment ................................................................................... 6-18
6.3.5 Transmit Deviation Balance (Compensation) Alignment ................................................ 6-18
6.3.6 Transmit Deviation Limit Alignment ................................................................................ 6-20
6.3.7 Bit Error Rate (BER) Test ............................................................................................... 6-22

Motorola ASTRO SPECTRA Specifications

General

Frequency Range	136-174 MHz, 403-470 MHz
Number of Channels	Up to 255
Channel Spacing	12.5 kHz, 20 kHz, 25 kHz
Modulation	FM
Operating Temperature	-22°F to +140°F (-30°C to +60°C)