Campbell TGT1, Operator'S Manual

Page: 22 / 64

TGT1 GOES Transmitter
12
24 Transmit window length is NESDIS-assigned and usually 1
minute. Type 0 for a 1 minute window or 1 for a 2 minute
window. The transmission is automatically centered around the
middle of the transmit window.
25 Sets the preamble length. In general, type 0 to use a short
preamble (0.98 seconds) for stationary land based stations.
Random mode requires the short preamble. Type 4 for a long
preamble (7.3 seconds). A long preamble increases the time the
satellite can lock onto the signal but reduces the time for
transmitting data.
26 Selects the buffer or buffers used. Type 1 to select only the self-
timed buffer, a 2 to select only the random, and a 3 to select both
buffers. These buffers must match Instruction 120's parameters
(see Section 9).
TABLE 8.2-2 Decimal Equivalent
Number Decimal
or letter equivalent
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
A 10
B 11
C 12
D 13
E 14
F 15
8.3 Status Information and Test Transmissions
The *#60 mode is for displaying status infor-mation and performing test
transmissions. *#60 mode is entered by typing *#60A. The execution interval
must be set to zero in table 1 and 2. You perform each command by typing the
command number (see Table 8.3-1) and an A. Multiple parameter commands
require typing an A to advance to the next parameter.
8.4 Error Messages
There are two error messages. The E101 message appears after the user types
*# and indicates the transmitter is not communicating with the datalogger (i.e.,
TGT1 is not powered, SC925G cable is not connected or the storage module is
blocking communication. See warnings on first page.). E102 appears after a
parameter is entered incorrectly.