Icom IC-F410, Руководство по обслуживанию

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*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.
DTCS WAVE
FORM
RECEIVE
[BPF T1]–
[BPF T4]
SQUELCH
LEVEL
[SQL]
• Operating frequency: (CH1)
[L-band] : 400.00000 MHz
[ML-band] ∏ : 440.00000 MHz
[ML-band]
Ò
: 450.00000 MHz
[MH-band] : 470.00000 MHz
[H-band] : 490.00000 MHz
• Connect an SSG to the antenna con-
nector and set as :
Level : adjust SSG’s level to 8
dB SINAD on the con-
necting SINAD meter
Modulation: OFF
• Receiving
CONVENIENT: The BPF T1–BPF T4 can be adjusted automatically.
q
-1 Set each to 0, then push the [F9] key.
(The cursor must be set to the BPF T1 position.)
q
-2 The connected PC tunes BPF T1–BPF T4 to peak levels.
or
w
-1 Set the cursor to one of BPF T1, T2, T3 or T4 as desired.
w
-2 Push [F8] to start tuning.
w
-3 Pepeat
w
-1 and
w
-2 to perform additional BPF tuning.
• Operating frequency: (CH1)
[L-band] : 400.00000 MHz
[ML-band] ∏ : 440.00000 MHz
[ML-band] Ò : 450.00000 MHz
[MH-band] : 470.00000 MHz
[H-band] : 490.00000 MHz
• Power selection : Low1
• No audio signal is applied to the [MIC]
jack
• DTCS code : 007
• Set an FM deviation meter as:
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P–P)/2
• Transmitting
• Operating frequency: (CH1)
[L-band] : 400.00000 MHz
[ML-band] ∏ : 440.00000 MHz
[ML-band] Ò : 450.00000 MHz
[MH-band] : 470.00000 MHz
[H-band] : 490.00000 MHz
• Connect a standard signal generator to
the antenna connector and set as:
Level : 3.2 µV* (–97 dBm)
Modulation: 1 kHz
Deviation : ±3.5 kHz (Wide)
±1.75 kHz (Narrow)
• Receiving
5 - 5
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT LOCATION
TRIMMER ADJUSTMENT — continued
Select an operation using [
↑
] / [
↓
]keys, then set specified value using [
←
] / [
→
] keys on the connected computer keyboard.
1 Rear
panel
Rear
panel
Connect an FM deviation meter
with an oscilloscope to the
antenna connector through an
attenuator.
Connect a SINAD meter with a 4
Ω
load to the external [SP] jack.
Minimum distortion
level
1 Rear
panel
Connect a SINAD meter with a 4
Ω
load to the external [SP] jack.
At the point where
noise just appears.
Set to flat wave
form