![background image](http://html1.mh-extra.com/html/icom/iv86/iv86_service-manual-addendum_4733731007.webp)
4-6b
The underlined parts have been updated from the previous version of the addendum, or from the original page.
(Amended page)
February 2021
ADJUSTMENT
ADJUSTMENT ITEM
DISPLAY
SETTING CONDITION
OPERATION
MODULATION
SENSITIVITY
-Verification-
1
• Connect the modulation analyzer to
the antenna connector through the
attenuator and set it to:
HPF: OFF
LPF:
20 kHz or 15 kHz
De-emphasis: OFF
Detector:
(P−P)/2
• Connect the audio generator and
the AC millivoltmeter to [MIC]
through the JIG cable 1,and set it to:
Frequency:
1 kHz
Waveform:
Sine wave
Level:
Adjust to the
level so that the
modulation analyzer
shows ±1.50 kHz of
deviation
• Transmitting
10.0~20.0 mV
(Audio generator output level)
TRANSMIT S/N
RATIO
-Verification-
1
• Set the modulation analyzer to:
HPF:
50 Hz
LPF:
3 kHz
De-emphasis: ON
Detector:
(P−P)/2
• Set the audio generator output level
so that the modulation analyzer
shows ±1.50 kHz of deviation.
• Transmitting
• Toggle the audio generator output
ON and OFF.
More than 34 dB
4-2 TRANSMIT ADJUSTMENTS (CONTINUED)