Icom IC-F3GT Service Manual page 17

SOFTWARE ADJUSTMENT – continued
Select an operation using [ ] / [ ] keys, then set specified value using [ ] / [ ] keys on the connected computer keyboard.
ADJUSTMENT
RX 1 • Operating frequency:
SENSITIVITY
[BPF T1] –
[BPF T4] • Connect a standard signal generator to
the antenna connector and set as:
Frequency
Level
Modulation
Deviation
• Set the NARROW ch.
• Receiving
CONVENIENT:
1
SQUELCH • Operating frequency:
LEVEL
[SQL]
• Connect a standard signal generator to
the antenna connector and set as:
Frequency
Level
Modulation
Deviation
• Receiving
2 • Receiving
*The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
* 1 W/N-type must adjust both (W-type) and (N-type).
ADJUSTMENT CONDITION
136.000 MHz (L-band)
146.000 MHz (H-band)
: 136.000 MHz (L-band)
: 146.000 MHz (H-band)
: 5.6 µV* (–92 dBm)
: 1 kHz
: ±3.5 kHz (W-type)*
±2.8 kHz (M-type)
±1.75 kHz (N-type)*
[W/N-type] only
The BPF T1–BPF T4 can be adjusted automatically.
q-1: Set the cursol to "BPF ALL" on the adjustment program and then push [ENTER]
key.
q-2: The connected PC tunes BPF T1–BPF T4 to peak levels.
w-1: Set the cursol to one of BPF T1, T2, T3, or T4 as desired.
w-2: Push [ENTER] key to start tuning.
w-3: Repeat w-1 and w-2 to perform additional BPF tuning.
136.000 MHz (L-band)
146.000 MHz (H-band)
: 136.000 MHz (L-band)
146.000 MHz (H-band)
: OFF
: 1 kHz
: ±3.5 kHz (W-type)*
±2.8 kHz (M-type)
±1.75 kHz (N-type)*
MEASUREMENT
UNIT LOCATION
Top Connect a SINAD meter with an
panel 8Ω load to the [SP] jack.
1
1
or
Top Connect a SINAD meter with an
panel 8Ω load to the [SP] jack.
1
1
5 - 7
VALUE
Minimum distortion
level
12 dB SINAD
At the point where
the audio signals
just appears.