I Main Unit - Icom IC-2720H Instruction Manual

1
PANEL DESCRIPTION

I Main unit

q w
r
q DATA SOCKET [DATA]
Connects a TNC (Terminal Node Controller), etc. for data
communications.
• See p. 6 for connection information.
5
e
t y u
i
w MICROPHONE CONNECTOR [MIC]
Connects the supplied or an optional microphone.
q +8 V DC output (Max. 10 mA)
w Channel up/down
e 8 V control IN
r PTT
t GND (microphone ground)
i q
y MIC (microphone input)
u GND
i Data IN
e CONTROLLER CONNECTOR [CONTROLLER] (p. V)
Connects the controller unit with the supplied cable.
r COOLING FAN
Rotates while transmitting.
Also rotates while receiving depending on the setting in ini-
tial set mode. (p. 62)
t ANTENNA CONNECTOR [ANT]
Connects a 50 Ω antenna with a PL-259 connector and a
50 Ω coaxial cable.
ANTENNA INFORMATION
For radio communications, the antenna is of critical impor-
tance, to maximize your output power and receiver sensi-
tivity. The transceiver accepts a 50 Ω antenna and less
than 1:1.5 of Voltage Standing Wave Ratio (VSWR). High
SWR values not only may damage the transceiver but also
lead to TVI or BCI problems.