INSTALLATION
WJ-8711A DIGITAL HF RECEIVER
2-4
2.2.3
POWER REQUIREMENTS
The WJ-8711A requires an input voltage of 90-264 VAC at 47 to 440 Hz for operation. The
receiver's internal power supply circuitry automatically adjusts to the power input applied (providing it is
within the specified range). Therefore, no manual switching of power source voltage selection is required.
The six-foot line power cord supplied with the receiver connects to the three-prong POWER connector
(FL1J1) located on the rear panel. The WJ-8711A requires approximately 50 watts for operation.
A 1 amp, slo-blo fuse (FL1F1) is provided and located in a fuse case on the rear panel of the
receiver (see
Figure 2-3
). This type fuse is to be used for operation anywhere in the VAC range.
40 VA MAX
47 - 440 Hz
90 - 264 VAC
LINE
1 AMP SB
FUSE
CSMA
A2J1
A3J3
A3J2
A3J1
TB1
RF
IN
SMO
EXT
REF
OUT
IF
+
-
CT
CT
-
+
-
+
D
C
A
U
D
IO
R
SS
I
S
Q
U
E
L
C
H
M
U
T
E
G
N
D
L
IN
E
A
L
IN
E
B
SP
EA
KE
R
A2J3
A2J2
WATKINS-JOHNSON
GAITHERSBURG MD
TYPE
SERIAL
PRESELECTOR
OUTPUT
RF
A4J2
INPUT
RF
87IL3
Figure 2-3. WJ-8711A Rear Panel
To replace the fuse, first turn off the receiver and disconnect the power cord from the rear
panel. Grasp the fuse case and pull straight out of its compartment in FL1. Remove the fuse from the fuse
case and replace with a 250 V, 1 amp, slo-blo fuse. Reinstall the fuse case in its compartment and press firmly
until it "clicks" in place. Reconnect the power cord.
2.2.4
CONNECTOR SIGNALS
All external connectors of the WJ-8711A are located on the rear panel, with the exception of
the PHONES jack which is located on the front panel.
Table 2-1
lists these connectors and provides a brief
description and the reference designation for each.
Figure 2-3
shows the location of the rear panel
connectors. The following paragraphs provide details of the signals resident at the connectors.
Courtesy of http://BlackRadios.terryo.org
Содержание WJ-8711A
Страница 4: ...iv THIS PAGE INTENTIONALLY LEFT BLANK Courtesy of http BlackRadios terryo org...
Страница 19: ...1 i SECTION I GENERAL DESCRIPTION Courtesy of http BlackRadios terryo org...
Страница 32: ...GENERAL DESCRIPTION WJ 8711A DIGITAL HF RECEIVER 1 12 NOTES Courtesy of http BlackRadios terryo org...
Страница 33: ...2 i SECTION II INSTALLATION Courtesy of http BlackRadios terryo org...
Страница 34: ...2 ii THIS PAGE INTENTIONALLY LEFT BLANK Courtesy of http BlackRadios terryo org...
Страница 47: ...3 i SECTION III LOCAL OPERATION Courtesy of http BlackRadios terryo org...
Страница 48: ...3 ii THIS PAGE INTENTIONALLY LEFT BLANK Courtesy of http BlackRadios terryo org...
Страница 92: ...LOCAL OPERATION WJ 8711A DIGITAL HF RECEIVER 3 44 NOTES Courtesy of http BlackRadios terryo org...
Страница 93: ...4 i SECTION IV RS 232 REMOTE OPERATION Courtesy of http BlackRadios terryo org...
Страница 94: ...4 ii THIS PAGE INTENTIONALLY LEFT BLANK Courtesy of http BlackRadios terryo org...
Страница 122: ...RS 232 REMOTE OPERATION WJ 8711A DIGITAL HF RECEIVER 4 28 NOTES Courtesy of http BlackRadios terryo org...
Страница 123: ...5 i SECTION V CSMA REMOTE CONTROL Courtesy of http BlackRadios terryo org...
Страница 124: ...5 ii THIS PAGE INTENTIONALLY LEFT BLANK Courtesy of http BlackRadios terryo org...
Страница 143: ...6 i SECTION VI CIRCUIT DESCRIPTION Courtesy of http BlackRadios terryo org...
Страница 157: ...7 i SECTION VII MAINTENANCE Courtesy of http BlackRadios terryo org...
Страница 158: ...7 ii THIS PAGE INTENTIONALLY LEFT BLANK Courtesy of http BlackRadios terryo org...
Страница 189: ...8 i SECTION VIII REPLACEMENT PARTS LIST Courtesy of http BlackRadios terryo org...
Страница 190: ...8 ii THIS PAGE INTENTIONALLY LEFT BLANK Courtesy of http BlackRadios terryo org...
Страница 241: ...FP i FOLDOUTS Courtesy of http BlackRadios terryo org...
Страница 242: ...FP ii THIS PAGE INTENTIONALLY LEFT BLANK Courtesy of http BlackRadios terryo org...
