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4-4 RECEIVER ADJUSTMENT
“SQUELCH ADJUSTMENT” must be performed at “SQUELCH ADJUSTMENT MODE”.
RX
SENSITIVITY
SQUELCH
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
1
2
1
2
3
• Operating frequency :
118.000 MHz
• Pre-set L9, L10, L11, L49 on the
MAIN unit to max. CCW.
• Connect an SSG to the antenna
connector and set an SSG as :
Level
: 1.0 µV
*
(–107 dBm)
Modulation
: ± 1 kHz
Mod. depth
: 30 %
• Receiving
• Operating frequency :
136.975 MHz
• Receiving
• Enter the “Squelch adjustment
mode”.
1): Program 118.000 MHz into
memory channel.
2): Turn power OFF.
3): While pushing [SQL], [TS],
[SCAN], turn power ON.
• Connect an SSG to the antenna
connector and set an SSG as :
Level
: 0.18 µV
*
(–122 dBm)
Modulation
: OFF
• Receiving
• Set an SSG as :
Level
: 5.6 µV
*
(–92 dBm)
Modulation
: OFF
Rear
panel
Front
panel
Connect an AC milli-
voltmeter and dis-
tortion meter with 8
Ω
load to the exter-
nal [SP] jack.
Display
Maximum AF output
level
Maximum AF output
level
MAIN
*This output level of the standard signal generator (SSG) is indicated as SSG’s open circuit.
L9, L10,
L11, L49
R59
• Verify the display indicates “sqADJ02”.
NOTE: If the display shows other, turn
[MAIN DIAL] to select
“sqADJ02”.
• Push the [SCAN] key to set the thresh-
old level.
• Verify the display indicates “sqADJ25”.
• Push the [SCAN] key to set the tight
level.
• Turn power OFF to cancell the “Squelch adjustment mode”.
NOTE: Until turn power OFF, “Squelch adjustment mode” is not cancelled, and once pushing the [SCAN] key,
display indicates “sqADJ02” (threshold level adjustment) or “sqADJ25” (tight level adjustment) repeat-
edly
