Rear Panel - AOR ARD9900 Operating Manual

i. Mode switch
Select the Digital voice mode [10101] or the Analog voice mode [~].
When the Analog voice mode [~] is selected, ordinary analog voice
communications will be made. In the receive mode, however, the ARD9900
will automatically detect the mode of the incoming signal and decode signals
accordingly. The LED indicates the respective operation mode.
j. Microphone connector
Connect the supplied microphone to this connector.
Below are the pin assignments of the connector.
1. Speaker output
2. BIAS
3. GND
4. TX
5. D/A
6. MIC PTT
7. MIC GND
8. MIC IN

Rear Panel

AOR,LTD.
k. Communication Connector (mini DIN 8 pin) for PC (RS-232C)
Pin Number
1
2
3
4
5
6
7
8
Shell
-- Monitor output signal is present at this pin.
-- Power source for an electret condenser type of
microphone. 5V DC through 2.2KΩ resistor.
-- Chassis ground
-- Grounding this pin will enable the transmit
mode.
(Same operation as the TX switch on the front
panel.)
-- Grounding this pin will force the unit to the
digital voice communication mode. When this pin is
left open, the operation mode will be set by the mode
switch on the front panel.
-- PTT (Push To Talk) input.
-- Microphone ground signal
-- Microphone signal input
VIDEO
IN OUT
l
k m
Signal
TX
DTR
DSR
GND
RX
RTS
CTS
NC
FG
7
OUT
SP
IN
RADIO
o
n p
Signal Direction
ARD9900
ARD9900
ARD9900  PC
GND
ARD9900  PC
ARD9900
ARD9900  PC
No Connection
Frame ground
- +
DC IN
q r
PC
PC
PC