5-2 PLL ADJUSTMENT

ADJUSTMENT

ADJUSTMENT CONDITIONS

 

MEASUREMENT

VALUE

ADJUSTMENT

 

 

 

 

 

UNIT

 

LOCATION

UNIT

ADJUST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLL LOCK

1

• Operating frequency

:

MAIN

 

Connect a digital multi

2.0 V

MAIN

L11

VOLTAGE

 

136.000 MHz (L-band)

 

 

meter to check point

 

 

 

 

 

146.000 MHz (H-band)

 

 

LV.

 

 

 

 

 

• Receiving

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

• Transmitting

 

 

 

 

1.5–2.5 V

 

Verify

 

 

 

 

 

 

 

 

 

 

• MAIN unit

RF power meter

L11

PLL lock voltage adjustment

LV

PLL lock voltage check point

Bottom view

5 - 4

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Image 15
Icom IC-F3GT, IC-F3GS service manual PLL Adjustment