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

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GENERAL DESCRIPTION WJ-8711A DIGITAL HF RECEIVER
1-8
1.5.4
WJ-8711/DSO1 DIGITAL SIGNAL OUTPUT OPTION
This option provides a digital signal output for external digital signal processing. A 15-pin
D-subminiature connector is provided on the rear panel of the receiver for digital signal output. Refer to
Appendix D for further information on the WJ-8711/DSO1 option.
1.5.5
WJ-871Y/488 IEEE-488 INTERFACE OPTION
This option provides a communications link between a remote IEEE-488 interface-equipped
controller and the receiver's host controller via a rear panel 24-pin GPIB connector. When this option is
installed, standard remote operations via the CSMA interface are not available. Refer to
Appendix E
for further
information on the WJ-871Y/488 option.
1.5.6
WJ-871Y/8KRF 8 kHz ROOFING FILTER OPTION
This option reduces the receiver's RF bandwidth to 8 kHz, improving the reception of weak
signals which are in the presence of large signals at nearby adjacent frequencies. The number of selectable IF
bandwidths is reduced to 8 (extending from 58 Hz to 8 kHz) and the receiver's Signal Monitor Output bandwidth
is reduced to 8 kHz. Refer to
Appendix F for further information on the WJ-871Y/8KRF option.
1.5.7
WJ-8711/SPK INTERNAL SPEAKER OPTION
The Internal Speaker option provides the receiver the capability to produce audible audio when
external speaker sources are not available. An 8-ohm, 4-inch speaker is provided with the option that is mounted
to the top cover of the receiver. Audio present at the speaker can be selected with the front panel SPEAKER key
and its volume can be controlled by the SPEAKER volume control knob.
1.5.8
WJ-8711/BFP BLANK FRONT PANEL OPTION
This option replaces the microprocessor front panel with a front panel containing only a power
switch, a phone jack, and audio controls. This option is well suited where only remote control of the receiver is
desirable.
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