User's Guide
Table Of Contents
1-6 Audio Processor Board Instruction Manual
Notes:
If FM Audio Processor JU36 is not installed, both microphone and balanced audio compression
amplifiers will be disabled. This means that the front panel microphone jack will be disabled for
local microphone operations. When in this condition, balanced audio is routed around the
compression circuitry via JU11 (installed) with JU1 and JU2 removed.
Table 4 Mode Condition Table
MODE
#
J6
J7
J18
Synthesizer/Osc
State
Audio
Processor State
(
8V Switched
)
Audio Processor
Compression
JU36
1a
OUT
Y Y
PTT Switched PTT Switched Switched
+
8.0V(X)
1b
OUT
Y Y
PTT Switched PTT Switched Continuous 9.5V(
Y
)
1c
O
UT
Y Y
PTT Switched PTT Switched
Disabled (Not Installed)
2a IN
Y
X Always enabled PTT Switched Switched
+
8.0V (X)
2b IN
Y
X Always enabled PTT Switched Continuous 9.5V (
Y
)
2c IN
Y
X Always enabled PTT Switched
Disabled (Not Installed)
3 IN X
Y
PTT Switched Always enabled Doesn
’
t matter
4 IN X X Always enabled Always enabled Doesn
’
t matter
Table 5 Standby Mode Selection Table
MODE
#
Total Xmtr Standby
Current
Startup Time
1a 13 mA 6 mA
150 mS
150 mS
1b 22 mA 15 mA 10 mS 10 mS
1c 13 mA 6 mA 10 mS 10 mS
2a 165 mA 25 mA
150 mS
150 mS
2b 174 mA 34 mA 10 mS 10 mS
2c 165 mA 25 mA 10 mS 10 mS
3 27 mA 20 mA 10 mS 10 mS
4 175 mA 34 mA 10 mS 10 mS
Table 6 FM Audio Processor Total Current Consumption.
Compression configuration Audio Processor
Current Draw
keyed / unkeyed
Compression enabled (JU36X) 15 mA/0.45 mA
Compression and microphone disabled
(JU36 Open)
9.2 mA/0.45 mA
Compression enabled (JU36
Y
) 15 mA /9.2 mA