Transmitter Adjustment - Icom IC-F2610 Service Manual

5-5 TRANSMITTER ADJUSTMENT

ADJUSTMENT
OUTPUT
POWER
FM
DEVIATION
DTCS WAVE
FORM AND
DEVIATION
CTCSS
TONE
DEVIATION
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ADJUSTMENT CONDITIONS
1 • Operating frequency : 440.000 MHz
• Enter Initial Set Mode No. 6.
Refer to page 5-2 for details.
1 • Operating frequency : 440.000 MHz
• Enter Initial Set Mode No. 4.
Refer to page 5-2 for details.
• Connect an audio generator to the
microphone connector and set as:
1 kHz/35 mV
• Set an FM deviation meter as:
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P–P)/2
• Wide/Narrow setting : Wide
2 • Wide/Narrow setting : Narrow
1 • Operating frequency : 465.000 MHz
• Enter Initial Set Mode No. 4.
Refer to page 5-2 for details.
• No AF signals are applied to the micro-
phone connector.
• Set an FM deviation meter as:
HPF : OFF
LPF : 20 kHz
2
De-emphasis : OFF
Detector : (P–P)/2
• Wide/Narrow setting : Wide
• DTCS code : 007
3 • Wide/Narrow setting : Narrow
1 • Operating frequency : 465.000 MHz
• Enter Initial Set Mode No. 4.
Refer to page 5-2 for details.
• No AF signals are applied to the micro-
phone connector.
• Set an FM deviation meter as:
HPF : OFF
LPF : 20 kHz
De-emphasis : OFF
Detector : (P–P)/2
• Wide/Narrow setting : Wide
• CTCSS tone frequency: 88.5 Hz
2 • Wide/Narrow setting : Narrow
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MEASUREMENT
METHOD
Connect an RF power meter to
the antenna connector.
NOTE: When the RF output power cannot be set with this proce-
dure, cloning may be necessary to cancel the output power
setting.
Connect an FM deviation
meter to the antenna connec-
tor through an attenuator.
Connect an FM deviation
meter with an oscilloscope to
the antenna connector through
an attenuator.
Connect an FM deviation
meter to the antenna connec-
tor through an attenuator.
5 - 5
ADJUSTMENT
VALUE ADJUST
25 W Rotate volume
control while
pushing .
P
3
10 W Rotate volume
control while
pushing .
P
2
2.5 W Rotate volume
control while
pushing .
P
1
±4.0 kHz Rotate volume
control while
pushing .
P
3
±1.75–±2.2 kHz Verify
Set to flat wave Rotate volume
form control while
pushing P .
1
±0.7 kHz Rotate volume
control while
pushing .
P
2
Verify
±0.25–±0.5 kHz
Rotate volume
±0.7 kHz
control while
pushing .
P
2
Verify
±0.25–±0.5 kHz