Icom IC-F3GT, Руководство по обслуживанию

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5 - 7
Minimum distortion
level
12 dB SINAD
At the point where
the audio signals
just appears.
1 • Operating frequency:
400.000 MHz
A
440.000 MHz B
470.000 MHz C
490.000 MHz
D
,
E
• Connect a standard signal generator to
the antenna connector and set as:
Frequency : 400.000 MHz A
440.000 MHz
B
470.000 MHz
C
490.000 MHz D , E
Level : 10 µV* (–87 dBm)
Modulation : 1 kHz
Deviation : ±3.5 kHz*
1 „
±2.8 kHz ˜
±1.75 kHz* 2 ˆ
• Receiving
• Operating frequency:
400.000 MHz A
440.000 MHz B
470.000 MHz
C
490.000 MHz
D
,
E
• Connect a standard signal generator to
the antenna connector and set as:
Frequency : 400.000 MHz
A
440.000 MHz
B
470.000 MHz C
490.000 MHz D , E
Level : 0.2 µV* (–121 dBm)
Modulation : 1 kHz
Deviation : ±3.5 kHz*
1
„
±2.8 kHz ˜
±1.75 kHz*
2 ˆ
• Receiving
• Receiving
RX
SENSITIVITY
[BPF T1] –
[BPF T4]
SQUELCH
LEVEL
[SQL]
Top
panel
Top
panel
Connect a SINAD meter with an
8
Ω
load to the [SP] jack.
Connect a SINAD meter with an
8
Ω
load to the [SP] jack.
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT LOCATION
*The output level of the standard signal generator (SSG) is indicated as the SSG’s open circuit.
SOFTWARE ADJUSTMENT – continued
Select an operation using [
↑
] / [
↓
] keys, then set specified value using [
←
] / [
→
] keys on the connected computer keyboard.
CONVENIENT:
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.
or
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.
1
2
A : 400–430 MHz B : 440–470 MHz C : 470–500 MHz D : 490–512 MHz E : 490–520 MHz
ˆ
: N-type
„
: W-type
˜
: M-type
*
1,
*
2
W/N-type must be set the standard signal generator deviation level both *
1
and *
2
on the RX SENSITIVITY AND SQUELCH
LEVEL ADJUSTMENTS.