Icom FP-561, Руководство по обслуживанию

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4 - 4
*This output level of the standard signal generator (SSG) is indicated as SSG’s open circuit.
4-5 RD-200 ADJUSTMENTS
REFERENCE
FREQUENCY
RECEIVE
SENSITIVITY
DECODE
ANTENNA
(EP3)
(EP4)
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
1
1
2
1
2
3
4
• Connect the antenna connector
to the FP-561’s DGPS connector
and turn FP-561 power ON.
• Set the connected FP-561 as:
Baud rate : 200
Fequency : 300.0 kHz
• Connect a standard signal gener-
ator to J4 on the ANT unit and set
as:
Fequency : 300.0 kHz
Modulation : OFF
• Set the connected FP-561 as:
Baud rate : 200
Fequency : 300.0 kHz
• Connect a standard signal gener-
ator to J4 on the ANT unit and set
as:
Fequency : 250.0 kHz
Level : 1 mV (–47 dBm)
Modulation : OFF
• Set an SSG as :
Frequency : 350.0 kHz
• Set the connected FP-561 as:
Baud rate : 200
Fequency : 300.0 kHz
• Remove solder at CP1 on the
ANT unit.
• Conncet a traking generator (or
SSG) to the EP3 on the ANT unit
using the probe JIG and set as:
Level : 7.1 mV (–30 dBm)
Frequency : 300.0 kHz
(SSG only)
• Conncet a TG (or SSG) to the
EP4 on the ANT unit using the
probe Jig and set as:
Level : 7.1 mV (–30 dBm)
Frequency : 300.0 kHz
(SSG only)
MAIN
ANT
MAIN
ANT
Connect a frequen-
cy counter to the
check point “CP1”.
Connect a SINAD
meter to J3.
Connect a DC volt-
meter or oscillo-
scope to the check
point “CP2”.
Connect a spectrum
analyzer to J5.
7.29920 MHz
25 % distortion
High level (5 V)
Low level (0 V)
TG
Peak point to 300 kHz
SSG
Maximum RF level
–40 dBm or more
TG
Peak point to 300 kHz
SSG
Maximum RF level
–40 dBm or more
MAIN
SSG
ANT
C71
Verify the
SSG level
less than
0.2 µV (–
121 dBm)
Verify
Verify
C3
Verify
C4
Verify
After adjustment, re-solder CP1 on the ANT unit.
+ –
10.2(d) mm
12.2(d) mm
to TG (SSG) output
ANT unit
EP4
EP3
Kind : enamelled wire
Diameter : 1.0 mm
Roll number : 2 roll
Squeeze to
PC board's edge
Wire description
• Probe JIG