Icom IC-821H - Adjustment Procedures; Preparation before Servicing; Required Test Equipment; Connections

SECTION 5 ADJUSTMENT PROCEDURES
5-1 PREPARATION BEFORE SERVICING
• REQUIRED TEST EQUIPMENT
EQUIPMENT
GRADE AND RANGE
DC power supply
Output voltage : 13.8 V
DC
Current capacity : 25 A or more
RF power meter
Measuring range :
1-60 W
(terminated type)
Frequency range :
120-460 MHz
Impedance : 50Q
SWR
: Less than 1.2 : 1
Frequency Frequency range :
0.1-460 MHz
counter
Frequency accuracy:
± 1 ppm or better
Sensitivity :
100 mV or better
FM deviation
Frequency range
: 120-460 MHz
meter
Measuring range :
0 to +5 kHz
Audio generator
Frequency range
:
300-3000 Hz
Output level
:
1-500 mV
Spectrum
Frequency range
: At least
1300 MHz
analyzer
Spectrum bandwidth:
± 100 MHz or wider
Attenuator
Power attenuation :
50 or 60 dB
Capacity :
60 W or more
• CONNECTIONS
FM deviation
meter
Speaker
Attenuator
50 or 60 dB
AC to [EXT SP]
millivoltmeter
CW keyer
to
[KEY]
DC power supply to [DC 13.8 V]
13.8 V / 25 A
• Microphone connector
Audio
generator
Pin 1 Pin 7
MI, INPCj)Cp:f::
Pin 5
PTT
EQUIPMENT
Sweep generator
Standard signal
generator
(SSG)
Digital multi meter
DC voltmeter
Oscilloscope
AC millivoltmeter
Ammeter
RF voltmeter
External speaker
to [ANT]
GRADE AND RANGE
Frequency range
:
120-460 MHz
Sweep bandwidth : At least
50 MHz
Output impedance
:50Q
Frequency range
:
120-460 MHz
Output level
:
0.1 I1V-32 mV
(-127 to -17 dBm)
Input impedance
:
10M Q/DC or better
Input impedance
:
50 kQN DC or better
Frequency range
:
DC-20 MHz
Measuring range
:
0.01-10 V
Measuring range
:
10 mV 10 V
Measuring capacity : 25 A
Frequency range
Measuring range
Impedance
Max. input power
Attenuator
50 or 60 dB
: 0.1-460 MHz
:
0.01-10 V
:8Q
:5W
Spectrum
analyzer
_------l RF power meter
60 W /50Q
VHF
_----I Standard signal
generator
UHF
CAUTION:
DO NOT transmit while
a
SSG is connected .
CAUTION:
When the [PREAMP] switch is
turned
ON, DC voltages are
applied to the antenna connector.
This may damage the signal
genarator.
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2-conductor 3.5 (d) mm (1/8") !
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5 -1