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

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WJ-8711A DIGITAL HF RECEIVER
FO-4. Example of an F1 F2 Scan Operation
with and without Lockouts (Sheet 1 of 2)
FP-11/(FP-12 blank)
The following steps are an example of the procedure necessary to set up an F1 F2 scan. In the example, the scan is set up with a
start frequency of 530 kHz, a stop frequency of 1.6 MHz, a step size of 10 kHz, and a dwell time of 3 seconds.
PROCEDURE CONTROL ACTIONS DISPLAY REACTION
A.
B.
C.
D.
E.
Press the SCAN TYPE key until the LED beside
F1 F2 is lit and then press the SCAN SETUP
key (SCAN SETUP key LED becomes lit).
Reset the start frequency to 0.53 MHz by entering
.53 and terminate with the SCAN SETUP key.
Approximately one second after the start frequency is entered, the display automatically
steps to the default or previously set stop frequency setting.
Reset the stop frequency to 1.6 MHz by
entering 1.6 and terminate with the SCAN
SETUP key.
Approximately one second after the stop frequency is entered, the display automatically steps
to the default or previously set step size setting.
Enter a step size of 10 kHz by entering 10 and
terminate with the SCAN SETUP key.
Approximately one second after the step size is entered, the display automatically steps
to the dwell timer setting.
Select a dwell time of 3 seconds by entering 3
and terminate with the SCAN SETUP key.
Approximately one second after the dwell time is entered, the scan setup mode is automatically
exited and the MEMORY/SCAN display goes blank.
SCAN
87IL125
SCAN
SCAN
TYPE
CHANNEL
F1 F2
F1 F2
W/LOCK
MEMORY/SCAN
F1
MEMORY/SCAN
MEMORY/SCAN
MEMORY/SCAN
MEMORY/SCAN
STEP 25.000 k
MEMORY/SCAN
MEMORY/SCAN
The following steps are an example of the procedure necessary to execute an F1 F2 scan. In the example, the auxiliary
parameters of the receiver are set first, such as selecting th 6 kHz IF bandwidth, AM detection mode, -95 dBm squelch level, and the
fast AGC mode. Then the scan is started. Steps are also given to pause the scan, reset the squelch level to -90 dBm, and then
resume the scan. The last step shows how to stop and exit the scan mode.
1. SET UP THE F1 F2 SCAN
2. EXECUTING THE F1 F2 SCAN
00 000000
F1 00 530000
F2 30 000000
3
SCAN
SETUP
5
F2 01 600000
STEP 10.000 k
DWELL 00.5 s
6
SCAN
SETUP
1
MEMORY/SCAN
MEMORY/SCAN
DWELL 03.0 s
3
SCAN
SETUP
1
SCAN
SETUP
0
PROCEDURE CONTROL ACTIONS DISPLAY REACTION
A.
B.
C.
D.
E.
F.
G.
H.
I.
Select the 6 kHz IF bandwidth.
Select the AM detection mode.
Set the squelch level to -95 dBm.
Set the AGC to the fast mode.
Press the SCAN TYPE key until the LED beside
F1 F2 is lit and then press the SCAN key to
start the scan (SCAN key LED becomes lit).
Press the PAUSE key to pause the scan
(PAUSE key LED becomes lit).
Reset the squelch level to -90 dBm.
Press the PAUSE key to restart the scan.
Press the SCAN key to stop the scan.
IF
BW
(AUX. PARAM.
EDIT KNOB)
DET
MODE
(AUX. PARAM.
EDIT KNOB)
6.0
kHz
AM
-dBm
6.0
kHz
AM
-dBm
FST
Hz
6.0
kHz
AM
-dBm
SCAN SCAN
SCAN
TYPE
CHANNEL
F1 F2
F1 F2
W/LOCK
AGC
9
SQUELCH
5
(AUX. PARAM.
EDIT KNOB)
PAUSE PAUSE
SQUELCH
(AUX. PARAM.
EDIT KNOB)
PAUSE PAUSE
SCAN
NOTE: The MEMORY SCAN EDIT KNOB can be used in the above example to jump back and forth between scan setup parameters.
(The FREQUENCY display
constantly steps through all
frequencies in the setup until
a signal is detected and
dwelled upon.)
(The FREQUENCY display
shows the tuned frequency.)
095
6.0
kHz
AM
-dBm
090
(The FREQUENCY display
constantly steps through all
frequencies in the setup until
a signal is detected and
dwelled upon.)
(The FREQUENCY display
shows the tuned frequency.)
SCAN
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