WJ-8711A DIGITAL HF RECEIVER
MAINTENANCE
7-5
9.
Referring the
Figure 3-1
, operate all of the pushbuttons and controls listed
below. Verify that all of the controls function correctly. For keys that have
associated function LEDs, ensure that the LED correctly indicates the status
of the key.
Tuning Step Buttons
Numeric Keypad
AGC Button
BFO Buttons
BLANKER Button
IF BW Button
DETECTION MODE Button
SQUELCH Button
SPECIAL FUNCTION Button (and all special functions)
Auxiliary Parameters Edit Knob
RF INPUT Button
SPEAKER Button
MEMORY/SCAN Buttons
Memory/Scan Parameters Edit Knob
7.6.3
REFERENCE FREQUENCY TIMEBASE ACCURACY
1.
Connect the WJ-8711A Receiver and test equipment as illustrated in
Figure 7-3
. Apply power to the receiver and test equipment and allow a
warm-up period of at least 30 minutes before proceeding with the timebase
testing.
FLUKE 1953A
FREQUENCY
COUNTER
RECEIVER
LINE A +
RF IN
RF OUT
A3J1
AUDIO -
2031
SIGNAL
GENERATOR
#2
EXT. REF INPUT.
2031
SIGNAL
GENERATOR
#1
10 MHz CESIUM FREQ. STANDARD
SEE
TEXT
EXT. REF INPUT.
87IL34
Figure 7-3. Reference Frequency Timebase Accuracy
Performance Test Equipment Connection
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 47: ...3 i SECTION III LOCAL OPERATION Courtesy of http BlackRadios terryo org...
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Page 93: ...4 i SECTION IV RS 232 REMOTE OPERATION 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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Page 189: ...8 i SECTION VIII REPLACEMENT PARTS LIST Courtesy of http BlackRadios terryo org...
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Page 241: ...FP i FOLDOUTS Courtesy of http BlackRadios terryo org...
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