Chapter 6 Troubleshooting Waveforms; Introduction; Table 6-1. List Of Troubleshooting Waveforms - Motorola ASTRO Digital Spectra Plus Detailed Service Manual

Chapter 6 Troubleshooting Waveforms

6.1

Introduction

This chapter contains images of waveforms that might be useful in verifying operation of certain
parts of the circuitry. These waveforms are for reference only; the actual data depicted will vary
depending upon the operating conditions.
Waveform W1: Power-On Reset Timing
Waveform W2: DSP SSI Port RX Mode
Waveform W3: DSP SSI Port TX Mode CSQ
Waveform W4: ABACUS Programming at Mode Change
Waveform W5: ABACUS/ADSIC Interface
Waveform W6: SPI Bus Programming ADSIC
Waveform W7: Receive Audio
Waveform W8: Transmit Audio
Waveform W9: Power-Down Reset
Waveform W10: ADSIC 2.4 MHz Reference
32 kHz Clock Waveform
16.8 MHz Clock Waveform
TX Modulation Out Waveform
Differential ADDAG Output Waveform
TX SSI Waveform
SPI Bus Waveform
TX 1 kHz Tone Waveform
Serial Audio Port Waveform
RX Audio Waveform
RX BBP Waveform
Secure Interface Waveform
8 kHz Frame Sync for Security Circuitry Waveform

Table 6-1. List of Troubleshooting Waveforms

Waveform
ASTRO Digital Spectra Waveforms
ASTRO Digital Spectra Plus VOCON Waveforms
Page
6-2
6-2
6-3
6-3
6-4
6-4
6-5
6-5
6-6
6-6
6-7
6-8
6-8
6-9
6-9
6-10
6-10
6-11
6-11
6-12
6-12
6-13