WJ-8711A DIGITAL HF RECEIVER
MAINTENANCE
7-3
NOTE
Power requirements for the WJ-8711A Receiver may
range from 90 to 264 VAC, with a line frequency ranging
from 47 to 440 Hz.
RECEIVER
RF IN
RF OUT
A3J1
2031
SIGNAL
GENERATOR
#1
ELGAR 501A
VARIABLE FREQ.
POWER SOURCE
CLARK-HESS 255
VOLT-AMP-PWR
METER
AC POWER
OUT
HEADPHONES
PHONES
AC POWER
IN
AC POWER
IN
AC POWER
OUT
87IL32
Figure 7-1. Power Consumption Performance Test Equipment Connection
4.
Set the Signal Generator to produce a 1.0000 MHz output at a level of
-90 dBm. Set the generator modulation for 400 Hz AM, 50% modulation.
5.
Apply power to the receiver and set the receiver parameters as follows:
Tuned Frequency:
1.000000 MHz
FRQ 1 <Return>
Detection Mode:
AM
DET 1 <Return>
IF Bandwidth:
6.0 kHz
BWS 4 <Return>
Gain Control:
AGC Fast
AGC 2 <Return>
Squelch:
Off
SQL 136 <Return>
6.
Adjust the PHONES LEVEL control for a clear 400 Hz audio tone in the
headphones.
7.
Verify that the power consumption level displayed on the Volt-Amp-
Wattmeter does not exceed 40 Watts.
8.
Slowly increase and decrease the Variable Frequency Power Source by 10%
of the initially set value while observing the power consumption level on the
Volt-Amp-Wattmeter. Verify that the power consumption throughout the
±
10% range remains at 40 Watts or less and a clear audio tone remains
present in the headphones.
Courtesy of http://BlackRadios.terryo.org
Summary of Contents for WJ-8711A
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Page 19: ...1 i SECTION I GENERAL DESCRIPTION Courtesy of http BlackRadios terryo org...
Page 33: ...2 i SECTION II INSTALLATION Courtesy of http BlackRadios terryo org...
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Page 123: ...5 i SECTION V CSMA REMOTE CONTROL Courtesy of http BlackRadios terryo org...
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Page 143: ...6 i SECTION VI CIRCUIT DESCRIPTION Courtesy of http BlackRadios terryo org...
Page 157: ...7 i SECTION VII MAINTENANCE Courtesy of http BlackRadios terryo org...
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