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

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LOCAL OPERATION WJ-8711A DIGITAL HF RECEIVER
3-8
The IF bandwidth select mode is enabled by pressing the SPECIAL FUNCTION key until the
upper display appears as follows:
IF BW SELECT
The currently selected IF bandwidth filter is displayed in the lower Auxiliary Parameter
display along with the work "include" or "skip". When "include" is displayed, that bandwidth is available for
selection by the receiver when in the IF bandwidth entry mode. When "skip" is displayed, the bandwidth is
not available for selection by the receiver when in the IF bandwidth entry mode. While in the IF bandwidth
select mode, each press of the IF BW key toggles the status of the displayed IF bandwidth filter between
"include" and "skip". Any or all of the 66 available IF bandwidth filters (see Table 1-1) can be included or
skipped as desired. The status of each IF bandwidth filter can be viewed in the lower Auxiliary Parameter edit
knob. To exit the IF bandwidth select mode, press any other Auxiliary Parameter key, extinguishing the IF
BW key and SPECIAL FUNCTION key LEDs.
The IF bandwidth entry mode is enabled by pressing the IF BW key, illuminating the IF BW
key LED. The currently selected IF bandwidth is displayed on the lower Auxiliary Parameter display. Each
press of the IF BW key steps through the choices of available IF bandwidth filters. Only those IF bandwidth
filters that were included for selection using the IF bandwidth select function are available. The IF bandwidth
can also be adjusted with the Auxiliary Parameter edit knob when in the IF bandwidth entry mode. The IF
bandwidth entry mode can be exited by pressing any other Auxiliary Parameter key, extinguishing the IF BW
key LED.
3.2.12
THE DET MODE KEY AND LED
The DET MODE key is located below the lower display in the Auxiliary Parameter section.
This key is used to enter the receiver's detection mode. The detection mode entry mode is enabled when the
DET MODE key LED is lit. The current selected detection mode is displayed on the lower Auxiliary
Parameter display. Each press of the DET MODE key steps through the choices of detection modes: AM,
SAM, FM, CW, LSB, USB, and ISB. If the current displayed detection mode is ISB, pressing the key again
causes the AM detection mode to be displayed. The detection mode can also be adjusted with the Auxiliary
Parameter edit knob when in the detection mode entry mode. The detection mode entry mode can be exited by
pressing any other Auxiliary Parameter key, extinguishing the DET MODE key LED.
3.2.13
THE SQUELCH KEY AND LED
The SQUELCH key is located below the lower display in the Auxiliary Parameter section.
This key is used to allow the entry of the receiver's squelch level or to turn it off. The squelch parameter entry
mode is enabled when the SQUELCH key LED is lit. The squelch parameter can be any value from 0 to -135
dBm or off. The squelch value is displayed in the lower Auxiliary Parameter display. (Note: The negative
sign (-) is not displayed.) If the squelch parameter is a numeric value when the squelch parameter entry
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