Icom IC-FR3000 Service Manual page 88

4-2 PLL ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITIONS
TX VCO LOCK • LCD display
VOLTAGE 1 • Receiving
RX VCO LOCK • LCD display
VOLTAGE 1 • Receiving
REFERENCE 1 • Wait for 5 minutes after power ON.
FREQUENCY • LCD display
• Connect an RF power meter or 50 Ω
dummy load to the TX antenna con-
nector.
• Transmitting
2 • LCD display
• Receiving
UNIT
: A01 LW TXREF
TX
: A01 LW TXREF
RX
REAR
: A01 LW TXREF panel
: A01 LW RXREF RX
4 - 4
MEASUREMENT
LOCATION
Connect a digital multi
meter or oscilloscope
to check point CP1.
Connect a digital multi
meter or oscilloscope
to check point CP1.
Loosely couple a fre- 450.2750 MHz
quency counter to the
TX antenna connector.
Connect a frequency 409.9250 MHz
counter to check point
HJ4.
ADJUSTMENT
VALUE
UNIT ADJUST
1.0 V TVCO C17
4.3 V RVCO C17
FRONT [PRT/BASE]
/[MONI]
FRONT [PRT/BASE]
/[MONI]