Technical Manual
Table Of Contents
- Vocoder and Controller Boards Detailed Theory of Operation
- Introduction to This Section
- General
- Vocoder Board
- Controller Board
- Switching Regulator
- RX Signal Path
- TX Signal Path
- Controller Bootstrap and Asynchronous Buses
- Vocoder Bootstrap
- SPI Bus Interface
- Universal Connector and Option Selects
- Keypad and Display Module
- Controls and Control Top Flex
- Controller Memory Map
- Vocoder Memory Map
- MCU System Clock
- DSP System Clock
- Radio Power-Up/ Power-Down Sequence
- Notes
- Secure Modules
- Disassembly/Reassembly Procedures
- Troubleshooting Procedures
- Troubleshooting Charts
- Troubleshooting Waveforms
- Troubleshooting Diagrams
11-4
Tek stopped:
T
1
Ch1
T
18 Acquisitions
Tek stopped:
T
2
Ch2
T
11
13
M 50ns Ch1 2.2 V
W6: SPI Bus Programming ADSIC.
Trace 1 - ADSIC_SEL*
Trace 2 - SPI_SCK
Trace 3 - MOSI
Note: These waveforms are typical to
any device on the SPI bus.
Ch1 Freq
= Hz
No period
found
Ch1
Ch3
5.00V
5.00V
5.00V
MAEPF-24381-O
T
T
T
ASTRO S
A
SPI Bus Progra
m
JP 1/31/94
PR
ILLUSTRATOR E
N
DATE
DESCRIPTION
LETTERING SIZE:
REQUIRES:
EDITOR C
H
DATE
Waveform W6
103 Acquisitions
Tek stopped:
T
2
Ch2
1
3
4
M 200us Ch1 2.20 V
W7: Receive audio: Receiving
1KHz tone @ 3KHz deviation, -60dBm.
Trace 1 - IRQB @ DSP (8KHz)
Trace 2 - SD0 @ C219
Trace 3 - SPKR_COMMON
Trace 4 - INT_SPKR
Ch1 Freq
7.9118kHz
Low signal
amplitude
5.00V
2.00V
200mV
2.00V
Ch1
Ch3
Note 3: Actual level is dependent upon volume setting.
MAEPF-26009-O
Ch4
3
T
T
T
Waveform W7