Reference Manual

Table Of Contents
Connectors
304 2110 SSB Transceiver Reference Manual
Pinouts of the 19-way GPIO connector
Figure 49: Front view of the 19-way GPIO connector
Table 39: Pinouts of the 19-way GPIO connector
Pin no. Function Signal levels
A Line audio in 300 mV p–p (ALC threshold)
I/P approx. 50 k bridging
B
C Line audio out 1 V p–p (20 dB above AGC)
600 load maximum
D Morse Active low
E RS232 transmit data RS232
F RS232 receive data
G PTT Active low
H Power and signal ground 0 V
J Speaker (+) audio output bridging 1 W into 4
K Protected, switched supply from
battery
12 V DC nominal
10–15 V DC range
1 A maximum
L Speaker (–) audio output paired
with J
1 W into 4
M Power in for charging battery 15.5 V DC approx.
1 A maximum, current limiting
N Antenna control 3.3 V logic input
5 V tolerant
P 3.3 V logic I/O
5 V tolerant
R Scan output Open collector 1 k pull-down
A
C
D
HG
M
N
ST
V
B
E
F
J
K
LP
RU