Adjustment Procedures; Preparation - Icom IC-A25N Service Manual

SECTION 4

4-1 PREPARATION

REqUIRED EqUIPMENT
■
EqUIPMENT
Output voltage:
DC power supply
Current capacity: 5 A or more
Battery pack BP-288 (Fully charged)
Measuring range: 0.1~5 W
RF power meter
Frequency range: 100~300 MHz
(50 Ω terminated)
SWR:
Range:
Frequency counter Accuracy:
Input level:
Frequency range: 30~300 MHz
Modulation Analyzer
Measuring range: 0~100%
Attenuation:
Attenuator
Capacity:
JIG CABLE
■
3-conductor 2.5 (d) mm plug
(MIC)
CONNECTIONS
■
Standard signal generator
−20 dBμ to 90 dBμ
(−127 dBm to −17 dBm)
VOR Tester
CAUTION!
DO NOT transmit while the SSG
or VOR tester is connected to the
antenna connector.
Used DC power plug
(for power supply connection)
Ø1.35
ADJUSTMENT PROCEDURE
SPECIFICATIONS
11 V
Less than 1.2 : 1
0.1~300 MHz
±1 ppm or better
Less than 1 mW
30~40 dB
More than 10 W
AUDIO GENERATOR
(300~3000 Hz/1~500 mV)
(GND)
PTT
33 kΩ
+
4.7 µF
9.5 (Unit: mm)
EqUIPMENT
Programming software
Programming cable
Standard signal
generator (SSG)
Audio generator (AG)
JIG cable
AC millivoltmeter
VOR tester
SETTING:
Frequency: 1 kHz
Level:
+ −
Waveform: Sine wave
Attenuator
30~40 dB
Loose
coupling
To [MIC]
Battery pack
(Fully charged BP-288)
To [DC 11V]
4-1
SPECIFICATIONS
CS-A25 Programming software
(Revision 1.0 or later)
OPC-478UC
Frequency range: 0.1~300 MHz
Output level: −20 dBμ to 90 dBμ
(−127 to −17 dBm)
Frequency range: 300~3000 Hz
Output level: 1~500 mV
See the illustration below.
Measuring range: 10 mV to 10 V
Frequency range: 108~118 MHz
Output level: −20 dBμ to 90 dBμ
(−127 to −17 dBm)
AC MILLIVOLTMETER
(10 mV to 10 V)
200/20 mV
+ −
Frequency counter
Modulation Analyzer
0~100%
RF power meter
0.1~5 W
Audio generator
300~3000 Hz/1~500 mV
AC millivoltmeter
10 mV to 10 V
DC power supply
11 V/5 A or more