General Connection; Front Panel; Rear Panel; Section 4 Adjustment Procedure - Icom IC-7300 Service Manual

SECTION 4

4-1 PREPARATION

M REQUIRED EQUIPMENTS
EQUIPMENT
Modified 3.5 mm (1/8 inch) monaural plug
Shunt plug
(See the illustration below.)
Measuring range:
RF power meter
Frequency range:
(50 Ω terminated)
SWR:
Frequency range:
Frequency counter Frequency accuracy: ±1 ppm or better
Input level:
M GENERAL CONNECTION

• Front panel

AC millivolt-
meter

GENERAL CONNECTION

• Rear panel

FREQUENCY COUNTER
(0.1–60 MHz)
(Short)
ADJUSTMENT PROCEDURE
GRADE AND RANGE
1–120 W
0.1–60 MHz
Less than 1.2 : 1
0.1–60 MHz
Less than 1 mW
Audio
generator
MICE
MIC
[MIC]
[MIC]
[DC 13.8V]
DC power supply
(13.8 V/30 A)
PTT
PTT
⊕ −
Fuses
25 A
[ANT]
⊕
Red
−
Black
Supplied DC cable
RF POWER METER
(120 W/50 Ω)
DUMMY LOAD
(50 or 100 Ω/120 W)
ATTENUATOR
(50 dB/120 W)
[SP]
STANDARD SIGNAL GENERATOR
(0.1–60 MHz)
AC MILLIVOLT METER
(10 mV to 10 V)
– +
EXT. SPEAKER
(2 W/8 Ω)
– +
EQUIPMENT
Dummy Loads Impedance:
Attenuator Attenuation:
Frequency range: 0.1–60 MHz
Standard signal
Output level:
generator (SSG)
Audio generator Frequency range: 300–3000 Hz
(AG) Output level:
AC Millivoltmeter Measuring range: 10 mV to 10 V
<Front view>
<Rear view>
[REMOTE]
(Shunt)
3.5 mm (1/8 inch) monaural plug
NEVER TRANSMIT while the SSG is connected.
• Short plug
(For entering the adjustment mode)
4-1
GRADE AND RANGE
50 Ω and 100 Ω/120 W
50 dB/120 W
–20 dBµ to +94 dBµ
(–127 to –13 dBm)
1–500 mV
AC millivolt-
<Main
TX
FRO
Sub
Aud
genera
meter
<Sub adju
MIC
MIC
TX
== R
Ga
[MIC
Adjustment item
Sub ad