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WJ-8718-19/FE HF RECEIVER
INSTALLATION AND OPERATION
2.3.1.9
IF Output (J12)
This BNC connector supplies a 455 kHz IF output. The level will be 20 mV
minimum, into 50 ohms in AGC mode, for RF input signals greater than 3 V.
2.3.1.10
ISB/FM Audio (J15)
IuiS ^6"pin Jcircular connector provides ISB audio (N.U.) and FM audio
outputs.
The FM audio output drives a high impedance load.
The output level is
approximately 1 V p-p for FM signal deviation equal to 30% of selected IF bandwidth
Pin assignments are as follows:
A -
FM AUDIO HI
D -
ISB AUDIO LO
B -
ISB CTR TAP
E -
N/C
C -
ISB AUDIO HI
F -
FM AUDIO LO
2.3.1.11
Line Audio Level (Rl)
This potentiometer adjusts the level of audio signals on the LINE AUDIO
pins of connector J16.
The front panel meter monitors this output when the related
LINE AUDIO switch is engaged.
Rotating this control fully clockwise provides a 50
mw audio output (24.5 V rms/ +30 dBm) into 600 ohms.
2.4
OPERATION
The following paragraphs are an operator's guide to familiarize the operator
with the different operating modes available with the receiver. The function and use
of the front panel controls and indicators are explained and detailed receiver
operating instructions are provided.
2.4.1
INTRODUCTION
The WJ-8718-19/FE Receiver incorporates the following operational features:
o
Local receiver control through momentary contact keypad
switches and a tuning knob on the front panel.
o
Ninety-nine discretely addressed and one implicitly addressed
memory channels.
The channels are utilized to store front
panel data.
They may be accessed individually or scanned.
o
A memory scan mode in which the receiver scans a selected
group of channels.
o
Remote control capability through an RS-232 link to an
external controller.
2-5
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