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Data Communication
Run a terminal software program such as Windows HyperTerminal to control the
ARD9900, and enter control commands.
Two different types of data, ASCII or binary data can be used. Both data types can be mixed
as communication data.
Receive
Enter the command [ACO] to go into the converse mode. The valid received data will be
decoded and displayed on the PC screen. If received data is missing, (which may occur during
poor propagation conditions) "garbage" data may be displayed on the PC screen.
Transmit
Enter the command [ACO] to enter the converse mode then type text on the keyboard. When
you have finished, press the enter key.
NNNNNNNN [CR]
NNNNNNNN : ASCII character
[CR]:
Note: Maximum data length is 2046 bytes per packet.
To send binary data, add [FE] (hexadecimal) as a header and footer to your data.
FE BBBBBBBBBBBBBBBB FE
BBBBBBBBBBBBBBB : Binary data
FE :
Note : If you need to insert the data [FE] in hexadecimal in the middle of the text, convert it into
two (2) bytes of hexadecimal data.]
Æ
FE
FDD8
If you need to insert the data [FD] in hexadecimal in the middle of the text, convert it to
two (2) bytes of hexadecimal data.
Æ
FD
FDDD
Note : Maximum data length is 2046 bytes per packet.]
At the receive side, the data will be automatically decoded and displayed on the PC screen.
If the [ALF] command is set ON, the LF (line feed) code will be added at the end of the
received data.
Digital Image Communication
Receive
When valid digital image data is received, it will be decoded and output as a video image from
the VIDEO OUT connector.
If received data is missing during a transmission, that portion will be displayed as invalid
(Like noise).
Transmit
When pin - 4 of the microphone connector is grounded, the ARD9900 starts sending an image.
When the Video Through Function is activated (AVT command is ON), pressing the TX switch
[Refer to: Control Commands at page 24 for details.]
Carriage Return
ID as a binary data
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