Filter
Top Products
y POWER RECEPTACLE [DC13.8V] (pgs. 15, 16)
Accepts 13.8 V DC ±15% with the supplied DC power
cable.
•Current of 12 A or greater is required.
DO NOT use a cigarette lighter socket as a power
source when operating in a vehicle.The plug may cause
voltage drops and ignition noise may be superimposed
onto transmit or receive audio.
u ANTENNA CONNECTOR [ANT]
Connects a 50 Ω antenna with a PL-259 connector and a
50 Ω coaxial cable.
DDATA JACK PIN ASSIGNMENTS
q DATA IN
Input terminal for data transmit. See p. 70 for details on
how to toggle data speed between 1200 and 9600 bps.
w GND
Common ground for DATA IN, DATA OUT and AF OUT.
e PTTP
PTT terminal for packet operation only. Connect ground to
transmit data.
r DATA OUT
Data out terminal for 9600 bps operation only.
t AF OUT
Data out terminal for 1200 bps operation only.
y PSQL (squelch out)
Becomes high (+5V) when the transceiver receives a sig-
nal which opens the squelch.
•To avoid unnecessary TNC transmission, connect squelch to the
TNC to inhibit transmission when receiving signals.
•Keep audio output at a normal level, otherwise a “PSQL” signal
will not be output.
9
2
PANEL DESCRIPTION
q DATA IN (1200 bps: AFSK
9600 bps: G3RUH, GMSK)
w GND
e PTTP
r DATA OUT (9600 bps)
t AF OUT (1200 bps)
y PSQL
ANTENNA INFORMATION
For radio communications, the antenna is of critical impor-
tance, along with output power and sensitivity. The trans-
ceiver accepts a 50 Ω antenna and less than 1.5 : 1 of
Voltage Standing Wave Ratio (VSWR). High SWR values
not only may damage the transceiver but also lead to TVI or
BCI problems.