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
11-5
507 Acquisitions
Tek stopped:
T
1
Ch4
T
2
3
4
M 200us Ch1 1.5 V
W8: Transmit Audio. 1KHz Tone
which provides 3KHz deviation.
Trace 1 - IRQB @ DSP (8KHz)
Trace 2 - MODIN
Trace 3 - EXT MIC @ node C189/R198
Trace 4 - MAI @ node R207/U718
MICAMPOUT
Ch1 Freq
7.9872kHz
Low signal
amplitude
5.00V
20.0mV
MAEPF-26010-O
500mV
500mV
Ch1
Ch3
Ch2
T
T
Waveform W8
1 Acquisitions
Tek stopped:
T
1
Ch1
T
2
M1.00ms Ch1 4.52 V
W9: Power Down Reset.
Trace 1 - +5V @ U726 (VDD)
Trace 2 - Reset @ U726 (OUT)
2.00V Ch2
MAEPF-26011-O
2.00V
T
Waveform W9