Campbell Scientific TX312 High Data Rate GOES Transmitter - Manual (Page 17)

TX312 Transmitter
4.3.9 Random 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.
4.3.10 Random Randomizing Interval
The Randomizing Interval is the average time between random transmissions.
When the TX312 receives data in the random data buffer, a random
transmission is scheduled. After the first transmission, the transmitter will
select a pseudo random time somewhere within the randomizing interval. This
process is repeated until the Random Repeat Count has been met, or the
datalogger removes the data from the random buffer.
4.3.11 Random Randomizing Percentage
Enter the percent of the randomizing interval that should be used in the
randomizing of random transmissions. Valid entries are 10 to 50, representing
10 to 50 percent of the randomizing interval.
4.3.12 Random Repeat Count
Enter the total number of random transmissions you want repeated after data
has been loaded to the random data buffer. Typically, 5 works well.
4.3.13 Random Data Format
The Random 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 Random 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 Random Msg Format option.
4.3.14 Random Msg Counter
The Random Msg Counter will insert a counter at the beginning of the data
stream. The counter indicates the number of random messages sent so far.
4.4 Save and Transfer the Settings to the TX312
Using the drop list, select the appropriate RS-232 communication port for your
computer.
Using a standard RS-232 serial cable, connect the Computer RS-232 serial port
to the TX312 RS-232 serial port. Apply 12 volts DC to the Power terminal.
Test the communications link by typing the enter key with the cursor in the
Terminal window. The TX312 will respond with the > character whenever the
Carriage Return character is received on the TX312 serial port.
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