Icom IC-F41GS Servise Manual page 18

SOFTWARE ADJUSTMENT – continued
Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard.
ADJUSTMENT
CTCSS/DTCS 1 • Operating freq. : 400.000 MHz
DEVIATON
[CTCS/DTCS]
• Output power : Low1
• CTCSS
• DTCS code
• Set the FM deviation meter as:
HPF
LPF
De-emphasis: OFF
Detector
• No audio applied to the [MIC] input.
• Transmitting
RX 1 • Operating freq. : 400.000 MHz
SENSITIVITY
[BPF T1] –
[BPF T4]
• IF bandwidth
• Connect a standard signal generator to
the antenna connector and set as:
Frequency
Level
Modulation
Deviation
• Receiving
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.
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.
NOTE:
*The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
ADJUSTMENT CONDITION
440.000 MHz
450.000 MHz
480.000 MHz
: 88.5 Hz
: 007
: OFF
: 20 kHz
: (P–P)/2
440.000 MHz
450.000 MHz
480.000 MHz
: Wide
: 400.000 MHz
440.000 MHz
450.000 MHz
480.000 MHz
: 10 µV* (–87 dBm)
: 1 kHz
: ±3.5 kHz
or
After "RX SENSITIVITY" adjustment is finished, "S-METER (or RSSI L0/L2—[MPT])" adjustment
(at page 5-9) must be re-adjusted.
MEASUREMENT
UNIT LOCATION
[L] Top Connect an FM deviation meter
[ML] panel to the antenna
[MH] through the attenuator.
[H]
[L] MAIN Connect a SINAD meter with an
8 Ω load to the multi connector
[ML]
[MH] through the JIG cable (*OPC-
[H] 966).
[L]
[ML]
[MH]
[H]
5 - 8
VALUE
0.70 kHz [Wide]
connector 0.35 kHz [Narrow]
Minimum distortion
level