PROCESSOR 
OUTPUT VOLTAGE LEVEL
 INPUT VOLTAGE ( MIC)
P3 COMPRESSION
P1
P2
EXT.SPK
SPK  8 ohm/2W
IN
OUT
AUDIO SPK. Filter
ANT
MIC
KEY EXT.SP
C
+
-
13,8V
SPEAKER  FILTER
8
Install the microphone processor unit to level out large fluctuations in your voice while you speak. 
Use P1 to set input signal level. 
Use P2 to set output signal level.
Use P3 to set compression level.  
Use the external speaker filter to selectively cut high frequencies of AF output signal.  
Connect the SPEAKER FILTER IN socket to speaker Jack socket in the radio. 
Connect the speaker to SPEAKER FILTER OUT socket.