Icom VHF IC-F50, Дополнение к руководству по обслуживанию

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5 - 5
SOFTWARE ADJUSTMENTS (RECEIVING)
• Select an operation using [
↑
] / [
↓
] keys, then set specified value using [
←
] / [
→
] keys on the connected computer keyboard.
• Need to adjust “S-METER ADJUSTMENT” after “RX SENSITIVITY ADJUSTMENT” is adjusted.
Otherwise, “S-METER ADJUSTMENT” will not be adjusted properly.
*The output level of the standard signal generator (SSG) is indicated as the SSG’s open circuit.
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT LOCATION
RX
SENSITIVITY
[BPF T1],
[BPF T2] 1 • Operating CH : CH10
• Connect a standard signal generator to
the antenna connector and set as:
Frequency : 136.000 MHz
Level : 10 µV* (–87 dBm)
Modulation : 1 kHz
Deviation : ±3.5 kHz
• Receiving
MAIN Connect a SINAD meter with an
8
Ω
load to the multi connector
through the JIG cable (see page
5-3).
Minimum
distortion level
CONVENIENT:
The BPF T1, BPF T2 can be adjusted automatically.
q
-1: Set the cursor to “BPF ALL” on the adjustment program and then push [ENTER] key.
q
-2: The connected PC tunes BPF T1, BPF T2 to peak levels.
or
w
-1: Set the cursor to one of BPF T1, T2 as desired.
w
-2: Push [ENTER] key to start tuning.
w
-3: Repeat
w
-1 and
w
-2 to perform additional BPF tuning.
S-METER
[S-METER] 1 • Operating CH : CH10
• Connect an SSG to the antenna connector
and set as:
Frequency : 136.000 MHz
Level : 4.5 µV* (–94 dBm)
Modulation : 1 kHz
Deviation : ±3.5 kHz
• Receiving
Push [ENTER] key on the connected computer keyboard to
set “S6 level”.
2 • Set an SSG as:
Level : 0.25 µV* (–119 dBm)
Modulation : 1 kHz
Deviation : ±3.5 kHz
• Receiving
Push [ENTER] key on the connected computer keyboard to
set “S1 level”.
SQUELCH
LEVEL
[SQL] 1 • Operating CH : CH6
• Connect an SSG to the antenna connector
and set as:
Frequency : 155.000 MHz
Level : 0.18 µV* (–122 dBm)
Modulation : 1 kHz
Deviation : ±3.5 kHz
• Receiving
Front
panel
Internal speaker Set “SQL level” to
close squelch.
Then set “SQL level”
at the point where
the audio signals
just appears.