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6 Computer control information
Your ARD25 is controllable by a PC via the RS-232C interface. No specific hardware
interface is required, just a straight RS-232C cable.
The ARD25 is equipped with an RS-232C port in addition to the connection port for a
receiver. The RS-232C port uses a DB-9 connector.
The ARD25 RS-232C specification is as follows:
Baud rate:
Data bits:
Stop bits:
Parity:
Flow control:
6-1 Computer control command set
With the ARD25 output, the following data is available through an RS-232C serial port.
(NOTE: NO recovered audio is available from the serial port.)
MI=************
AG=**
KY=****
TG=****
SI=******
DI=******
MI, AG, KY --- Encryption data
In the normal mode (non encryption mode), the output data will be:
MI=000000000000, AG=80, KY=0000
In the encryption mode, different data will be output.
(Decoding encryption is not possible.)
TG --- Talk Group (in 4 digits hexadecimal codes)
SI ---- Sender's ID number (in 6 digits hexadecimal codes)
DI ---- Receiver's ID sent by sender (in 6 digits hexadecimal codes)
Please note that the DI code is not usually sent (not used).
If it is the case, the DI will be displayed as ******
7 Specifications
Input signal:
Impedance:
Input level:
Receive modes:
9600 bps
8
1
None
RTS / CTS
10.7MHz IF
50 ohms
More than -105dBm
APCO Project 25 digital voice signal (Non
encrypted signal only)
8
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