Icom VHF Marine Transceiver IC-M88 - Manual (Page 18)

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SOFTWARE ADJUSTMENT – continued
• Select an operation using [ ↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard.
• “SQUELCH LEVEL ADJUSTMENT” must be performed after “RX SENSITIVITY ADJUSTMENT” is finished.
• “SQUELCH LEVEL ADJUSTMENT” must be performed when “RX SENSITIVITY ADJUSTMENT” is adjusted.
Minimum distortion
level
1 • Operating frequency : center frequency
• Channel spacing : Wide
• Connect a standard signal generator to
the antenna connector and set as:
Level : 10 µV* (–87 dBm)
Modulation : OFF
Deviation : ±3.0 kHz
• Receiving
• Operating frequency : center frequency
• Channel spacing
: Wide
• Connect a standard signal generator to
the antenna connector and set as:
Level : 0.56 µV* (–112 dBm)
Modulation : 1 kHz
Deviation : ±3.0 kHz
• Receiving
RX
SENSITIVITY
[BPF T1]–[BPF T4]
SQUELCH
LEVEL
[SQL]
Top
panel
Top
panel
Connect a SINAD meter with an
8
Ω load to the [SP] jack.
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT LOCATION
*The output level of the standard signal generator (SSG) is indicated as the SSG’s open circuit.
CONVENIENT: The BPF T1–BPF T4 can be adjusted automatically.
1: Set the curso r to “BPF ALL” on the adjustment program and then push [ENTER] key.
2: The connected PC tunes BPF T1–BPF T4 to peak levels.
or
1: Set the cursol to one of BPF T1, T2, T3, or T4 as desired.
2: Push [ENTER] key to start tuning.
3: Repeat w-1 and w-2 to perform additional BPF tuning.
1 The “SQUELCH LEVEL” adjustment is adjusted by
“ADJUSTMENT SOFTWARE”, automatically.
ADJUSTMENT ADJUSTMENT CONDITION VALUE