Icom IC-F24 Service Manual

5 - 5
5-3 SOFTWARE ADJUSTMENTS (TRANSMITTING)
Select the operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard.
Set to square wave
form
*For F24S/F25S adjustment.
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT
LOCATION
PLL LOCK
VOLTAGE
[LV (RX LVA)]
[LV (TX LVA)
1 • Operating CH : CH2 (*CH1)
• Receiving
PC
screen
"LVIN" item on the
CS-F14 ADJ's screen.
1.0 V
2• Operating CH : CH2 (*CH1)
• Connect an RF power meter or 50
Ω
dummy load to the antenna connector.
• Transmitting
1.0 V
CONVENIENT:
PLL LOCK VOLTAGE can be adjusted automatically.
Select "TX LVA"/"TX LVA" item on the CS-F14 ADJ screen, and push [ENTER] key.
3 • Operating CH : CH5 (*CH2)
• Receiving
PC
screen
"LVIN" item on the
CS-F14 ADJ's screen.
3.3–4.5 V
(Verify)
4• Operating CH : CH5 (*CH2)
• Connect an RF power meter or 50
Ω
dummy load to the antenna connector.
• Transmitting
3.3–4.5 V
(Verify)
REFERENCE
FREQUENCY
[REF]
1 • Operating CH : CH5 (*CH1)
• Transmitting
Top
panel
Loosely couple the frequency
counter to the antenna
connector.
470.0000 MHz
[US2], [EU2], [GE2]
520.0000 MHz
[US3], [GE3]
OUTPUT
POWER
[Power (Hi)]
1 • Operating CH : CH1 (*CH1)
• Transmitting
Top
panel
Connect the RF power meter
to the antenna connector.
4.0 W
[Power (L2)] 2 • Operating CH : CH3 (*CH2)
• Transmitting
2.0 W
[Power (L1)] • Operating CH : CH2 (*CH3)
• Transmitting
1.0 W
FM
DEVIATION
[MOD N]
(Narrow)
1 • Operating CH : CH8 (*CH1)
• Set the deviation meter as:
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P_P)/2
• Connect the audio generator the [MIC]
connector and set as
: 1.0 kHz 150mV rms
• Transmitting
Top
panel
Connect the FM deviation
meter to the antenna
connector through the
attenuator.
±2.10 kHz
[MOD Ratio]
(Middle; EUR only)
2 • Operating CH : CH9 (*CH2)
• Transmitting
±3.20 kHz
[MOD Ratio]
(Wide)
3 • Operating CH : CH9 (*CH2)
• Transmitting
±4.10 kHz
MODULATION
BALANCE
[BAL N]
(Narrow)
1 • Operating CH : CH6 (*CH1)
• No audio applied to the [MIC] input.
• Set the deviation meter as:
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P_P)/2
• Transmitting
Top
panel
Connect the FM deviation
meter with the oscilloscope
to the antenna connector
through an attenuator.
[BAL Ratio]
(Middle; EUR only)
2 • Operating CH : CH7 (*CH2)
• Transmitting
[BAL Ratio]
(Wide)
3 • Operating CH : CH7 (*CH2)
• Transmitting

Icom IC-F24 Specifications

General

Brand	Icom
Model	IC-F24
Category	Transceiver
Language	English