Watkins-Johnson Company WJ-8711A, Installation, Operation And Maintenance Manual

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CSMA REMOTE CONTROL WJ-8711A DIGITAL HF RECEIVER
5-10
FE
PREAMBLE
FE
RX
ADDR
TX
ADDR
CONTROL
CODE
FIXED LENGTH
DATA
MESSAGE
BREAK
2D
1A F1 02 00 00 00 30
x 1 Hz x 1 MHz
UPPER FREQUENCY LIMIT
FIXED LENGTH
DATA
END OF
MESSAGE
FD
00 00 00 00
x 1 Hz x 1 MHz
LOWER FREQUENCY LIMIT
87IL13
Figure 5-8. Tuned Frequency Range Request Response Format
5.8.5
DETECTION MODE/IF BANDWIDTH COMMAND
WITHOUT ACKNOWLEDGE [01]
Figure 5-9 shows an example of the typical format for selecting the receiver's detection mode
and IF bandwidth using control code [01]. This control code provides the same result as the [06] command
described in
paragraph 5.8.6 except it does not require an acknowledgment. For this reason it is not the
preferred method to change IF bandwidth or detection mode.
FE
PREAMBLE
FE
RX
ADDR
TX
ADDR
CONTROL
CODE
END OF
MESSAGE
1A F1 01 05 04 FD
DET
MODE
IF
BW
87IL14
Figure 5-9. Detection Mode/IF Bandwidth Command Format Without Acknowledge
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