Software Adjustments - Icom IC-F24 Service Manual

5-3 SOFTWARE ADJUSTMENTS (TRANSMITTING)
Select the operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard.
ADJUSTMENT
PLL LOCK 1 • Operating CH
VOLTAGE • Receiving
[LV (RX LVA)]
[LV (TX LVA)
2 • Operating CH
• Connect an RF power meter or 50 Ω
dummy load to the antenna connector.
• Transmitting
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
• Receiving
4 • Operating CH
• Connect an RF power meter or 50 Ω
dummy load to the antenna connector.
• Transmitting
REFERENCE 1 • Operating CH
FREQUENCY • Transmitting
[REF]
OUTPUT 1 • Operating CH
POWER • Transmitting
[Power (Hi)]
[Power (L2)] 2 • Operating CH
• Transmitting
[Power (L1)] • Operating CH
• Transmitting
FM 1 • Operating CH
DEVIATION
• Set the deviation meter as:
[MOD N]
(Narrow)
• Connect the audio generator the [MIC]
connector and set as
• Transmitting
[MOD Ratio] 2 • Operating CH
(Middle; EUR only)
• Transmitting
[MOD Ratio] 3 • Operating CH
(Wide)
• Transmitting
MODULATION 1 • Operating CH
BALANCE • No audio applied to the [MIC] input.
[BAL N] • Set the deviation meter as:
(Narrow)
• Transmitting
[BAL Ratio] 2 • Operating CH
(Middle; EUR only)
• Transmitting
[BAL Ratio] 3 • Operating CH
(Wide)
• Transmitting
*For F24S/F25S adjustment.
ADJUSTMENT CONDITION
: CH2 (*CH1)
: CH2 (*CH1)
: CH5 (*CH2)
: CH5 (*CH2)
: CH5 (*CH1)
: CH1 (*CH1)
: CH3 (*CH2)
: CH2 (*CH3)
: CH8 (*CH1)
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P_P)/2
: 1.0 kHz 150mV rms
: CH9 (*CH2)
: CH9 (*CH2)
: CH6 (*CH1)
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P_P)/2
: CH7 (*CH2)
: CH7 (*CH2)
MEASUREMENT
UNIT LOCATION
PC " L V I N " i t e m
screen CS-F14 ADJ's screen.
PC " L V I N " i t e m
screen CS-F14 ADJ's screen.
Top Loosely couple the frequency
panel counter to the antenna
connector.
Top Connect the RF power meter
panel to the antenna connector.
Top Connect the FM deviation
panel m e t e r t o t h e a n t e n n a
c o n n e c t o r t h r o u g h t h e
attenuator.
Top Connect the FM deviation
panel meter with the oscilloscope
to the antenna connector
through an attenuator.
5 - 5
VALUE
o n t h e 1.0 V
1.0 V
o n t h e 3.3–4.5 V
(Verify)
3.3–4.5 V
(Verify)
470.0000 MHz
[US2], [EU2], [GE2]
520.0000 MHz
[US3], [GE3]
4.0 W
2.0 W
1.0 W
±2.10 kHz
±3.20 kHz
±4.10 kHz
Set to square wave
form