Icom IC-7800, Service Manual

Page: 42 / 215

4 - 1
SECTION 4 ADJUSTMENT PROCEDURES
AC outlet
RF power meter
(terminated type)
Frequency counter
RF voltmeter
AC millivolt meter
Attenuator
Oscilloscope
Audio generator
Standard signal
generator (SSG)
Digital multimeter
DC voltmeter
DC ammeter
Spectrum analyzer
External speaker
Dummy load
Voltage : 85–265 V
Measuring range : 250–300 W
Frequency range : 1.8–100 MHz
Impedance : 50
Ω
SWR : Less than 1.2 : 1
Frequency range : 0.1–100 MHz
Frequency accuracy : ±0.5 ppm or better
Sensitivity : 100 mV or better
Frequency range : 0.1–100 MHz
Measuring range : 0.01–10 V
Measuring range : 10 mV to 10 V
Power attenuation : 50 or 60 dB
Capacity : 200 W
Frequency range : DC to 20 MHz
Measuring range : 0.01–20 V
4-1 PREPARATION BEFORE SERVING
M
REQUIRED TEST EQUIPMENTS
EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE
Frequency range : 300–3000 Hz
Measuring range : 1–500 mV
Frequency range : 0.1–100 MHz
Output level : 0.1 µV to 32 mV
(–127 to –17 dBm)
Input impedance : 10 M
Ω
/DC or more
Input impedance : 50 k
Ω
/V DC or better
Measurement capability: 5 A/30 A
Frequency range : At least 90 MHz
Spectraum bandwidth : 100 kHz or more
Input impedance : 8
Ω
Capacity : 5 W or more
Input impedance : 50 and 100
Ω
Capacity : 200 W or more
M
CONNECTIONS
[ANT1] [ANT2] [ANT3] [ANT4]
AC millivolt meter
AC outlet
to [AC] connector
to MAIN [EXT SP]
Speaker
Audio
generator
PTT
[MIC]
RF power meter
Standard signal
generator
CAUTION !
DO NOT
transmit while
an SSG is connected to
the antenna connector.
to the antenna connector1
AC millvolt
meter