Icom IC-M422 - SECTION 5 ADJUSTMENT PROCEDURES

5 - 1
EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE
DC power supply
Output voltage : 13.8 V DC
Current capacity : More than 10 A
Audio generator
Frequency range : 300–3000 Hz
Measuring range : 1–500 mV
RF power meter
(terminated type)
Measuring range : 1–30 W
Frequency range : 100–300 MHz
Impedance : 50
Ω
SWR : Less than 1.2 : 1
Standard signal
generator (SSG)
Frequency range : 0.1–300 MHz
Output level : 0.1
µ
V to 32 mV
(–127 to –17 dBm)
Frequency counter
Frequency range : 0.1–300 MHz
Frequency accuracy : ±1 ppm or better
Sensitivity : 100 mV or better
Oscilloscope
Frequency range : DC to 20 MHz
Measuring range : 0.01–20 V
FM deviation meter
Frequency range : 30–300 MHz
Measuring range : 0 to ±10 kHz
AC millivoltmeter Measuring range : 10 mV to 10 V
DC volt meter Input impedance : 50 k
Ω
/V DC or more
External speaker
Input impedance : 4
Ω
Capacity : More than 5 W
Attenuator
Power attenuation : 40 or 50 dB
Capacity : More than 30 W
SECTION 5 ADJUSTMENT PROCEDURES
5-1 PREPARATION
M REQUIRED TEST EQUIPMENTS
To the antenna connector
To DC power connector
Standard signal
generator
0.1 µV to 32 mV
(–127 to –17 dBm)
CAUTION:
DO NOT transmit while SSG is connected
to the antenna connector.
DC power supply
13.8 V /10 A
Frequency
counter
FM deviation
meter
Attenuator
40 dB or 50 dB
+
–
Red
Black
RF power meter
1–30 W
To external speaker lead
Distortion meter
AC millivoltmeter
Speaker (4 Ω)
SP+ (Yellow)
SP− (Black)
M CONNECTION