Icom IC-F24 Service Manual page 18

5-3 SOFTWARE ADJUSTMENTS (RECEIVING)
• Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard.
ADJUSTMENT
CTCSS/DTCS 1 • Operating CH
DEVIATION
• No audio applied to the [MIC] input.
[CTCS/DTCS]
• Transmitting
RX 1 • Operating CH
SENSITIVITY • Connect a standard signal generator to
[BPF T1], the antenna connector and set as:
[BPF T2] Frequency
Level
Modulation
Deviation
• Receiving
CONVENIENT:
RX SENSITIVITY can be adjusted automatically.
Select "BPF ALL" item on the CS-F14 ADJ's screen, and push [ENTER] key.
SQUELCH 1 • Operating CH
LEVEL
• Connect an SSG to the antenna connector
[SQL]
and set as:
Frequency
Level
Modulation
Deviation
• Receiving
*For F24S/F25S adjustment.
ADJUSTMENT CONDITION
: CH10 (*CH1)
: CH11 (*CH1)
: 400.000 MHz
[US2], [EU2], [GE2]
450.000 MHz
[US3], [GE3]
: +20 dBµ (–87dBm)
: 1 kHz
: ±3.5 kHz
: CH11 (*CH1)
: 400.000 MHz
[US2], [EU2], [GE2]
450.000 MHz
[US3], [GE3]
: –14 dBµ (–121dBm)
: 1 kHz
: ±3.5 kHz
MEASUREMENT
UNIT LOCATION
Top Connect the FM deviation
panel
meter to the antenna
connector through the
attenuator.
Side Connect the SINAD meter
with an 8 Ω load to the [SP]
Panel
jack through the JIG cable.
Side Connect a speaker to the
[SP] jack through the JIG
pannel
cable.
5 - 6
VALUE
±0.68 kHz
Minimum distortion level
Set "SQL level" to close
squelch.
Then set "SQL level" at the
point where the audio
signals just appears.