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4-5 RECEIVER ADJUSTMENTS
ADJUSTMENT
ADJUSTMENT CONDITION
RECEIVER
1
• Display frequency : 2.1820 MHz
GAIN
• Mode
• Noise blanker
• Squelch
• Speaker
• AGC
• RF gain
• R223 (MAIN unit) : Max. clockwise
• R257 (MAIN unit) : Max.counter
• R300 (MAIN unit) : Center
• Connect a standard signal genera-
tor to the [ANT] connector and set
as:
Frequency
Level
Modulation
• Receiving
CLARITY
1
• While pushing the [SQL] and [CE]
switches, turn power ON.
TOTAL GAIN
1
• Display frequency : 12.2300 MHz
• Mode
• Connect a standard signal genera-
tor to the [ANT] connector and set
as:
Frequency
Level
Modulation
• Receiving
2
• Set the signal generator to OFF (no
output).
1
• While pushing the [SQL] and [RX]
S-METER
switchs, turn power ON.
• Display frequency : 12.2300 MHz
• Mode
2
• Connect a standard signal genera-
tor to the [ANT] connector and set
as:
Frequency
Level
• Receiving
NOISE
1
• Display frequency : 12.2300 MHz
BLANKER
• Mode
• Connect a standard signal genera-
tor to the [ANT] connector and set
as:
Frequency
Level
Add the following signal into
the signal generator output.
1 msec.
• Receiving
*This output level of the standard signal generator (SSG) is indicated as SSG's open circuit.
: J3E
: OFF
: OFF
: OFF
: ON
: 9
clockwise
: 2.1815 MHz
: 0.5 µV*
(–113 dBm)
: OFF
: J3E
: 12.2315 MHz
: 0.32 mV*
(–57 dBm)
: OFF
: J3E
: 12.2315 MHz
: 1 mV*
(–47 dBm)
: J3E
: 12.2315 MHz
: 3.2 µV*
(–97 dBm)
100 msec.
MEASUREMENT
UNIT
LOCATION
Rear
Connect an AC milli-
Panel
voltmeter to the [EXT
SP] jack with a 4 Ω
dummy load.
Set the [CLARITY] control to the center position and
push the [DIMMER] switch.
Rear
Connect an AC milli-
Panel
voltmeter to the [EXT
SP] jack with a 4Ω
dummy load.
Function
S/RF meter
display
MAIN
Connect an oscillo-
scope to R59.
4 - 8
ADJUSTMENT
VALUE
UNIT
Muximum output level
MAIN
Front
Panel
1.0 V
Front
Panel
–30 dB (32 mV)
MAIN
Push the [DIMMER]
Font
switch.
Panel
7th dot just appears
while pushing the
[DIMMER].
1
2
3
4
MAIN
Adjust the maximum
noise wave displayed
on the oscilloscope.
POINT
ADJUST
Adjust in
sequence
L74, L75,
L78, L79,
L83, L84,
L85, L92,
L93
[CLARITY],
[DIMMER]
[VOLUME]
R223
[DIMMER]
Verify
L80, L81
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