3
DTX INPUT/OUTPUT CONNECTORS
DB-15 Connector Pinout
Pin Number
Name
Description
Comments
1
CS0
Channel Select low bit
2
CS1
Channel Select mid bit
3
CS2
Channel Select high bit
4
MIC IN
Microphone Input
Input for microphone type
signals to be transmitted.
Signals at this input are pre-
emphasized, limited, and
filtered. This input is disabled in
very narrowband mode.
5
CSN
High/Low Power or Channel 1/2 (in RNet Mode)
6
NC
No Connection
7
AUX IN
Auxiliary Input
Wideband input for data.
8
AUX OUT
Auxiliary Output
Wideband output for data.
9
PGN IN/OUT
Programming I/O
External programmer
connects here.
10.
CTS
Clear to Send
Asserted when
transmitter can accept
modulation.
11.
RX MON
Monitor
Breaks squelch in receive.
12.
AUDIO OUT
Audio PA Output
Output of audio PA.
13.
DCD
Carrier Detect
Carrier detect output.
14.
PTT/RTS
Push to Talk
Activates transmitter.
15.
GND
Ground
Negative supply point and
reference for all inputs.
2-Pin Molex Connector
1
+Vsupply
+10-16VDC
2
GND
Ground
Pinout Description
Pin Number
Description
1
CS0-Least significant bit of the channel select lines. Active high 5 volt
TTL/CMOS level. Internal 10 k
pull-up to +5 volts.
2
CS1-Mid bit of the channel select lines. Active high 5 volt TTL/CMOS level.
Internal 10 k
pull-up to +5 volts.
