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6816985H01-B
August 16, 2007
700/800 MHz Detailed Theories of Operation:
VOCON Functional Blocks
4.4-19
Figure 4.4-5. VOCON Receive Audio Path
ABACUS III
U401
RX_SSI_FSYNC
RX_SSI_CLK
RX_SSI_DATA
Patriot SPIB
Patriot SAP/BBP
MAKO_CS
SPI_MISOB
CODEC_RX
CODEC_DCLK
CODEC_FSYNC
VC_OUT_P
VC_OUT_M
PA_IN_M
PA_IN_P
SPI_MOSIB
SCKB
HP & LP
Filter = 22kHz,
200Hz
PA
Control
Digital
LPF = 3.4kHz
CODEC
16-Bit
D/A
G4
Preamp =
0 to 10
dB
G1 Digital
Gain = 0 or
1 dB
G3
Attenuator
= -52 to 0
dB
G5
EXT PA
=26 dB
G6
INT PA
=26 dB
MAKO IC U701
Internal
Speaker =
28 ohms
External
Speaker
3
4
3
Summary of Contents for ASTRO MT 1500
Page 4: ...iv Table of Contents August 16 2007 6816985H01 B Notes ...
Page 164: ...August 16 2007 6816985H01 B 5 6 Troubleshooting Procedures Operational Error Codes Notes ...
Page 188: ...August 16 2007 6816985H01 B 6 1 24 VHF Troubleshooting Charts Secure Hardware Failure Notes ...
Page 212: ...August 16 2007 6816985H01 B 6 2 24 UHF1 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 236: ...August 16 2007 6816985H01 B 6 3 24 UHF2 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 710: ...9 2 40 UHF1 Schematics Board Overlays and Parts Lists August 16 2007 6816985H01 B Notes ...
Page 806: ...9 5 32 900MHz Schematics Board Overlays and Parts Lists August 16 2007 6816985H01 B Notes ...
Page 816: ...Index 4 August 16 2007 6816985H01 B Notes ...
Page 817: ......