Campbell Scientific TX320 Transmitter - Manual (Page 72)

Appendix F. Extended ASCII Command Set
The random transmission repeat count is the number of times a random
transmission will be repeated. The random transmissions will occur once every
random transmission interval as specified by the randomizing interval. The
valid range of this parameter is 0 – 99. For example, a value of 3 will direct
the transmitter to send the data in the random buffer 3 times before clearing it.
A value of 0 indicates that random transmissions will occur every random
transmission interval until the random buffer is cleared by the host.
F.3.17 Enable or Disable Random Transmission Message
Counter
Syntax:
RMC=Y/N
Access level: USER
TX320 State: Disabled
If RMC is Y, a random message counter will be included at the beginning of
the message, ahead of the user data. If it is N, the random message count will
not be included.
F.4 Data Buffer Loading Commands
The following commands are used to manage and store data in the GOES
transmission buffers.
F.4.1 Load Self-Timed Transmission Buffer
Syntax:
TDT =xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Access level: USER
TX320 State: Enabled
This command overwrites the GOES Timed Buffer with the data provided.
The TX320 transmitter will insert the 31 bit GOES ID, any header information
(for example, HDR Flag byte), and append the EOT so these should not be
included in the TDT data. If the timed data format is ASCII or pseudo binary,
the transmitter will also insert the correct parity bit for each message character
and replace illegal characters with the character specified by the IRC=c
command before transmission.
Characters that have meaning for the command interface (CR, LF, BS,
ESC,’~’) must be preceded by a ‘~’ character if they appear in the message
data.
The maximum length of the formatted data can be up to 126000 bits, or 15750
bytes.
If there is more data loaded into the buffer than can be transmitted in the
assigned transmit window, the message will be truncated.
One minute prior to transmission data is removed from the transmit buffer and
encoded for transmissiion (The DATA IN BUFFER LED will go out). If this
command is received within 1 minute of the transmission time or during a
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