1-3
LISTEN 1A
LISTEN 1B LISTEN 2B LISTEN 3A LISTEN 3B LISTEN 4A LISTEN 4B LISTEN 5A LISTEN 6ALISTEN 5B
INPUT 1 OUTPUT 1 LISTEN 2A OUTPUT 2
INPUT 4
OUTPUT 4
INPUT 3
OUTPUT 3
INPUT 5
OUTPUT 5
INTERCOM
PORT 1
INTERCOM
PORT 2
INTERCOM
PORT 3
INTERCOM
PORT 4
INTERCOM
PORT 5
INTERCOM
PORT 6
INPUT 6
4W
IN
4 WIRE
4W
OUT
2W 4W 4W
BTR-1 BLOCK DIAGRAM
HEADSET
GLOBAL/LOCAL
OUTPUT 6 LISTEN 6B
COMPRESSOR
EXPANDER
PRE
EMPHASIS
DE
EMPHASIS
A/D
LOW PASS
FILTER
TRANSMITTER
RECEIVER SQUARING
AMP
DSP
D/A
AUX
IN
AUX
OUT
HS
LEVEL MIC
GAIN
AUX
INPUT 2
2W
AUX IN
Fig ure 1-1
BTR-1 Block Diagram