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5-2 PLL AND RX SENSITIVITY ADJUSTMENTS
ADJUSTMENT
ADJUSTMENT CONDITION
LOCK
1
• Operating frq.
VOLTAGE
• Receiving
• Operating frq.
2
• Output power
• Transmitting
• Operating frq.
RX
1
• Set an SSG as:
SENSITIVITY
Frequency
Level
Modulation
Deviation
• Receiving
*The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
CP1
PLL lock voltage
check point
MEASUREMENT
UNIT
: 156.800 MHz
MAIN
: 156.800 MHz
: Low
: 156.800 MHz
Top
Panel
: 156.800 MHz
: 3.2 µV*
(–97 dBm)
: 1 kHz
: ±3.5 kHz
5 - 3
LOCATION
Connect a digital
multi-meter or oscil-
loscope
to
the
check point CP1.
Connect an SSG to
0.35 µV (–116 dBm)
the antenna con-
nector and a SINAD
meter with 8 Ω load
to the [SP] jack.
ADJUSTMENT
POINT
VALUE
UNIT
ADJUST
1.8 V
1.7 V
Verify
Verify
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