Section 5 Adjustment Procedures; Preparation - Icom IC-4008A Service Manual

SECTION 5

5-1 PREPARATION

REQUIRED TEST EQUIPMENT
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 voltmeter Input impedance
ENTERING THE ADJUSTMENT MODE
Turn the transceiver power OFF.
While connecting the "TEST" on the RF board to "GND", then turn power ON.
(See location at page 5-3)
CONNECTIONS
FM deviation
DC power supply
4.5 V /1.0 A
ADJUSTMENT PROCEDURES
GRADE AND RANGE
: 4.5 V DC
: 1 A or more
: 1 mW–1 W
: 300–600 MHz
: 50 Ω
: Less than 1.2 : 1
: 0.1–600 MHz
: 100 mV or better
: 30–600 MHz
: 0 to ±10 kHz
: 50 kΩ/V DC or better
CAUTION:
DO NOT transmit while SSG is
connected to the antenna connector.
meter
–
+
EQUIPMENT
Audio generator
Standard signal
generator (SSG)
Oscilloscope
AC millivoltmeter
External speaker
Attenuator
Attenuator
30 dB or 40 dB
5 - 1
GRADE AND RANGE
Frequency range : 300–3000 Hz
Measuring range : 1–500 mV
Frequency range : 0.1–600 MHz
Output level : 0.1 µV–32 mV
(–127 to –17 dBm)
Frequency range : DC–20 MHz
Measuring range : 0.01–10 V
Measuring range : 10 mV–10 V
: 8 Ω
Input impedance
Capacity : 300 mW or more
Power attenuation : 30 or 40 dB
Capacity : 1 W or more
Standard signal
generator
–17 to –125 dBm
(32 mV to 0.1 V)
RF power meter
50 / 1–500 mW
Frequency
counter
to the RF test port J1