Software Adjustment - Icom IC-F21 Service Manual

5-3 SOFTWARE ADJUSTMENT

Select an operation using [ ] / [ ] keys, then set specified value using [ ] / [ ] keys on the connected computer keyboard.
ADJUSTMENT
REFERENCE 1 • Operating frequency:
FREQUENCY
[TXF] • High/Low switch
• Connect the RF power meter or 50
dummy load to the antenna connector.
• Transmitting
OUTPUT 1 • Operating frequency:
POWER
[POWER(Hi)] • High/Low switch
• Transmitting
[POWER(L2)] 2 • High/Low switch
• Transmitting
[POWER(L1)] 3 • High/Low switch
• Transmitting
FM 1 • Operating frequency:
DEVIATION
(Wide) • High/Low switch
[MOD W] • Channel spacing
• Connect the audio generator to the
[MIC] jack and set as:
• Set the FM deviation meter as:
HPF
LPF
De-emphasis
Detector
• Transmitting
(Narrow) 2 • Channel spacing
[MOD N] • Transmitting
DTCS WAVE 1 • Operating frequency:
FORM
[DTCS BAL] • High/Low switch
• No audio applied to the [MIC] jack.
• DTCS code
• Transmitting
ADJUSTMENT CONDITION
470.000 MHz
: Low
440.000 MHz
: High
: Low2
: Low1
455.000 MHz
: Low1
: Wide
1.0 kHz/150 mVrms
: OFF
: 20 kHz
: OFF
: (P–P)/2
: Narrow
455.000 MHz
: Low1
: 007
MEASUREMENT
UNIT LOCATION
Top Loosely couple a frequnecy
panel counter to the antenna connec-
tor.
Top Connect an RF power meter to
panel the antenna connector.
Top Connect an FM deviation meter
panel to the antenna
through the attenuator.
Top Connect an FM deviation meter
panel with an oscilloscope to the
antenna connector through an
attenuator.
5 - 5
VALUE
470.0000 MHz
4.0 W
2.0 W
1.0 W
±4.10 kHz
connector
±2.10 kHz
Set to flat wave
form