Software Adjustment - Icom IC-F41GS Servise 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 freq. : 430.000 MHz
FREQUENCY
[TXF]
• Output power : Low1
• Connect the RF power meter or 50 Ω
dummy load to the antenna connector.
• Transmitting
OUTPUT 1 • Operating freq. : 400.000 MHz
POWER
[Power (Hi)]
• Output power : High
• Transmitting
[Power (L2)] 2 • Output power : Low2
• Transmitting
[Power (L1)] 3 • Output power : Low1
• Transmitting
MODULATION 1 • Operating freq. : 415.000 MHz
BALLANCE
[Ballance]
• Output power : Low1
• Set the FM deviation meter as:
HPF
LPF
De-emphasis: OFF
Detector
• Push [P0] key while transmitting
FM 1 • Operating freq. : 400.000 MHz
DEVIATION
[MOD W]
• Output power : Low1
• IF bandwidth
• Set the FM deviation meter as:
HPF
LPF
De-emphasis: OFF
Detector
• Connect the audio generator to the multi
connector through the JIG cable (*OPC-
966) and set as: 1.0 kHz/150 mVrms
• Transmitting
[MOD N] 2 • IF bandwidth
• Transmitting
ADJUSTMENT CONDITION
480.000 MHz
490.000 MHz
512.000 MHz
520.000 MHz
440.000 MHz
450.000 MHz
480.000 MHz
460.000 MHz
470.000 MHz
496.000 MHz
500.000 MHz
: OFF
: 20 kHz
: (P–P)/2
440.000 MHz
450.000 MHz
480.000 MHz
: Wide
: OFF
: 20 kHz
: (P–P)/2
: Narrow
MEASUREMENT
UNIT LOCATION
[L] Top Loosely couple a frequnecy
[ML] panel counter to the antenna connec-
[MH] tor.
[H1]
[H2]
[L] Top Connect an RF power meter to
[ML] panel the antenna connector.
[MH]
[H]
[L] Top Connect an FM deviation meter
[ML] panel with an oscilloscope to the
[MH] antenna connector through an
[H1] attenuator.
[H2]
[L] Top Connect an FM deviation meter
[ML] panel to the antenna
[MH] through the attenuator.
[H]
5 - 7
VALUE
430.0000 MHz [L]
480.0000 MHz [ML]
490.0000 MHz [MH]
512.0000 MHz [H1]
520.0000 MHz [H2]
4.0 W
2.0 W
1.0 W
Set to square wave
form
±4.1 kHz
connector
±2.1 kHz