Preparation - Icom IC-7851 Servise Manual

SECTION 3.

3-1 PREPARATION

M REQUIRED EQUIPMENT
EQUIPMENT
Measuring range
Frequency range
RF power
(terminated type)
Impedance
SWR
Frequency range
Frequency Counter Frequency accuracy : ±0.5 ppm or better
Input level
Input impedance
Digital multimeter Measuring range
Frequency range
Audio Generator
Output level
M REMOVING COVERS
RF-A/-B UNIT cover
ADJUSTMENT PROCEDURE
SPECIFICATION
: 10–300 W
: 1.8–60 MHz
: 50 
: Less than 1.2 : 1
: 0.1–100 MHz
: Less than 1 mW
: 50 k/DC or more
: Voltage: 0.1–30V
Current: 5A/30A
: 300–3000 Hz
: 1–500 mV
RF-A UNIT RF-A UNIT RF-B UNIT
RF-A UNIT RF-A UNIT RF-A UNIT
EQUIPMENT
Frequency range
Standard Signal
Output level
Generator (SSG)
AC Millivoltmeter Measuring range
Input impedance
External Speaker
Capacity
Power attenuation : 50 or 60 dB
Attenuator
Capacity
MAIN UNIT MAIN UNIT MAIN UNIT
3-1
SPECIFICATION
: 0.1–100 MHz
: –20 dBµ to 90 dBµ
(–127 to –17 dBm)
: 10 mV to 10 V
: 8 
: More than 5 W
: More than 200 W
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