Section 5 Adjustment Procedures; Preparation - Icom IC-M422 Service Manual

SECTION 5

5-1 PREPARATION

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