Campbell TX312, Instruction Manual

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TX312 Transmitter
you’ve been given a 100/300 channel number. In SatCommad, don’t enter the
letter A. When 0 is entered, self-timed transmissions are disabled.
4.3.3 Timed Bit Rate
Enter the assigned channel bit rate (baud rate). Valid entries are 100, 300, or
1200. The bit rate is assigned by NESDIS and is tied to the channel number.
Using the wrong bit rate will prevent NESDIS from receiving your data.
4.3.4 Timed Interval
The Timed Interval is how often data is transmitted. The options include days,
hour, minutes, and seconds. Generally the interval will be zero days, 1 hour,
zero minutes, and zero seconds.
4.3.5 First Timed Transmission
The First Timed Transmission is also referred to as the Offset. The first timed
transmission will always be between zero and the timed interval. The TX312
will transmit on the next Timed Interval after the clock has been set.
4.3.6 Timed Tx Window
The Timed Transmit Window is the length of the assigned self-timed transmit
window in seconds. Valid entries are 5 to 120 seconds in 1 second increments.
4.3.7 Timed Msg Format
The Timed Message Format determines how the flag word is written and
which characters are legal. Select A if the data format is ASCII, select P for
Pseudo Binary, option B has not yet been defined by NESDIS. Please note:
The Timed Msg Format does not change the format of the data; instead, the
flag word is changed. The datalogger program determines the data format and
must match the format selected in the Timed Msg Format option.
4.3.8 Random Channel
If NESDIS has not assigned a Random Channel, Sections 4.3.8 through 4.3.14
do not apply.
The Random Channel is the NESDIS assigned random transmission channel.
When using 100 and 300 baud, valid channel numbers are between 0 and 267.
When using 1200 baud, valid channel numbers are 0 to 133, where 100 to 133
are international channels. For 1200-baud channels, the formal channel
designation is the channel number followed by the letter A, for example: 99A.
For clarification, see Appendix E. If your assigned channel number does not
include the letter A, either you don’t have a 1200-baud channel assignment or
you’ve been given a 100/300 channel number. In SatCommad, don’t enter the
letter A. When 0 is entered, self-timed transmissions are disabled.
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