Motorola ASTRO Digital Spectra, Detailed Service Manual, Page: 245 / 442

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.
Table 6-1. List of Troubleshooting Waveforms
Waveform Page
ASTRO Digital Spectra Waveforms
Waveform W1: Power-On Reset Timing
6-2
Waveform W2: DSP SSI Port RX Mode
6-2
Waveform W3: DSP SSI Port TX Mode CSQ
6-3
Waveform W4: ABACUS Programming at Mode Change
6-3
Waveform W5: ABACUS/ADSIC Interface
6-4
Waveform W6: SPI Bus Programming ADSIC
6-4
Waveform W7: Receive Audio
6-5
Waveform W8: Transmit Audio
6-5
Waveform W9: Power-Down Reset
6-6
Waveform W10: ADSIC 2.4 MHz Reference
6-6
ASTRO Digital Spectra Plus VOCON Waveforms
32 kHz Clock Waveform
6-7
16.8 MHz Clock Waveform
6-8
TX Modulation Out Waveform
6-8
Differential ADDAG Output Waveform
6-9
TX SSI Waveform
6-9
SPI Bus Waveform
6-10
TX 1 kHz Tone Waveform
6-10
Serial Audio Port Waveform
6-11
RX Audio Waveform
6-11
RX BBP Waveform
6-12
Secure Interface Waveform
6-12
8 kHz Frame Sync for Security Circuitry Waveform
6-13