Adjustment Procedures; Preparation - Icom IC-M504 Service Manual

SECTION 5

5-1 PREPARATION

¤ REQUIRED TEST EQUIPMENTS
EQUIPMENT
Output voltage
DC power supply
Current capacity
Measuring range
Frequency range
RF power meter
(terminated type)
Impedance
SWR
Frequency range
Frequency counter Frequency accuracy : ±1 ppm or better
Sensitivity
Frequency range
FM deviation meter
Measuring range
Frequency range
Audio generator
Output level
• CONNECTION
1 2 3 4 5 6
J4
(LOGIC UNIT)
–
Audio generator
+
–
AC millivoltmeter
+
CAUTION:
DO NOT transmit while SSG is connected
to the antenna connector.

ADJUSTMENT PROCEDURES

GRADE AND RANGE
: 13.8 V DC
: More than 7 A
: 0.1–30 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
: 300–3000 Hz
: 1–500 mV
7 8
[PTT]
EQUIPMENT
DC voltmeter
Standard signal
generator (SSG)
AC millivoltmeter
External speaker
Attenuator
Red
To external speaker lead
FM deviation
meter
Attenuator
40 dB or 50 dB
RF power meter
1–30 W
Frequency
counter
Standard signal
generator
0.1 µV to 32 mV
(–127 to –17 dBm)
5 - 1
GRADE AND RANGE
Input impedance : 50 kΩ /V DC or better
Frequency range : 0.1–300 MHz
: 0.1 µV to 32 mV
Output level
(–127 to –17 dBm)
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
+
To DC power connector
DC power supply
–
SP+ (Yellow)
SP− (Shield)
13.8 V /7 A
AC millivoltmeter
Distortion meter
Speaker (4 Ω)