5 - 3
5-2 PLL AND RX SENSITIVITY ADJUSTMENTS
LOCK
VOLTAGE
RX
SENSITIVITY
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
1
2
1
• Operating channel : ch16
• Receiving
• Operating channel : ch16
• Output power
: Low
• Transmitting
• Operating channel : ch16
• Set an SSG as:
Frequency
: 156.8 MHz
(ch. 16)
Level
: 3.2 µV*
(–97 dBm)
Modulation
: 1 kHz
Deviation
: ±3.5 kHz
• Receiving
MAIN
Top
Panel
Connect a digital
multi-meter or oscil-
loscope to the
check point CP1.
Connect an SSG to
the antenna con-
nector and a SINAD
meter with 8
Ω
load
to the [SP] jack.
1.8 V
1.7 V
0.35 µV (–116 dBm)
[M2A]
0.56 µV (–112 dBm)
[M21]
Verify
Verify
CP1
PLL lock voltage
check point
*The output level of the standard signal generator (SSG) is indicated as the SSG’s open circuit.
