Icom IC-4088SR - Section 5 Adjustment Procedures; Preparation

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ENTERING THEADJUSTMENT MODE
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Turn the transceiver’s power OFF.
™™
While connecting the “TEST” on the MAIN unit to “GND”, then turn power ON.
5 - 1
EQUIPMENT
DC power supply
RF power meter
(terminated type)
Frequency counter
SECTION 5 ADJUSTMENT PROCEDURES
5-1 PREPARATION
• When adjusting the IC-4088SR, *HM-75A JIG MICROPHONE (modified HM-75A OPTIONAL SPEAKER-MICROPHONE; see illustration at
page5-2) is required.
• All adjustment items must be preformed at “ADJUSTMENT MODE”. (See below in detail)
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REQUIRED TEST EQUIPMENT
GRADE AND RANGE
Output voltage : 4.5 V DC
Current capacity : 1 A or more
Measuring range : 1 mW–1 W
Frequency range : 300–600 MHz
Impedance : 50 Ω
SWR : Less than 1.2 : 1
Frequency range : 0.1–600 MHz
Frequency accuracy : ±1 ppm or better
Sensitivity : 100 mV or better
EQUIPMENT
FM deviation meter
Standard signal
generator (SSG)
AC millivoltmeter
Audio generator
GRADE AND RANGE
Frequency range : 30–600 MHz
Measuring range : 0 to ±10 kH
Frequency range : 0.1–600 MHz
Output level : 0.1 µV–32 mV
(–127 to –17 dBm)
Measuring range : 10 mV–10 V
Frequency range : 300–3000 Hz
Output level : 1–500 mV
CHANNEL NO.
1ch.
2ch.
3ch.
4ch.
5ch.
6ch.
7ch.
8ch.
FREQUENCY
446.00625 MHz
446.01875 MHz
446.03125 MHz
446.04375 MHz
446.05625 MHz
446.06875 MHz
446.08125 MHz
446.09375 MHz
• DISPLAYED CHANNEL’S FREQUENCY LIST
TEST
J1
RF
GND
J1
RF test port
ENTERING THE ADJUSTMENT MODE
q Turn the transceiver power OFF.
w While connecting the "TEST" to GND,
then turn power ON.