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9.1-2
INT_MIC_P
Internal Mic Bias
R751, R753,
C751,
C753, C755
MUX
External Mic Bias
EXT_MIC_P
R750, R752,
C750, C752
C754
MAKO_CS
SPI_MISOB
SPI_MOSIB
SCKB
ABACUS III
U401
RX_SSI_FSYNC
RX_SSI_CLK
3
3
RX_SSI_DATA
Patriot SAP/BBP
Patriot SPIB
CODEC_RX
CODEC_DCLK
MAKO_CS
CODEC_FSYNC
SPI_MISOB
4
SPI_MOSIB
SCKB
VC_OUT_P
HP & LP
Filter = 22kHz,
VC_OUT_M
200Hz
PA_IN_M
Internal
Speaker =
PA_IN_P
28 ohms
External
Speaker
Figure 9.1-1. Radio Interconnect Block Diagram
February 14, 2012
MAKO IC U701
Amp G2
Pre-amp
CODEC
Gain = -30
G1 Gain
A/D 16-Bit
to 0 dB
= 15 dB
HPF = 200 Hz
& LPF = 3.4
kHz cutoff
CODEC_TX
4
CODEC_FSYNC
CODEC_DCLK
Patriot
Patriot
RF D/A
SPIB
SAP / BBP
U201
3
TX_SSI_FSYNC
TX_SSI_CLK
TX_DATA
MAKO IC U701
CODEC
Digital
16-Bit
LPF = 3.4kHz
G1 Digital
D/A
Gain = 0 or
1 dB
G4
G3
Preamp =
Attenuator
0 to 10
dB
= -52 to 0
dB
G5
EXT PA
=26 dB
PA
Control
G6
INT PA
=26 dB
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VHF Schematics, Board Overlays, and Parts Lists
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6816985H01-F
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