Furuno FS-1503 manual User Channel Registration, Performance, Noise

Performance

If no problems were found in the preceding sections, then turn on the transceiver and check it for proper performance.

Receiver

1.Turn on the loudspeaker.

2.Turn off the squelch.

3.Check that all the bands can be received clearly.

If signal strength is too low or there is too much noise return to “Visual check” and recheck. Double check the antenna and ground. If there is no trouble, proceed to the next step.

Transmitter

On each band, confirm that the antenna is automatically tuned when the [TUNE/7] key or the PTT switch is pressed. (“OK” appears when tuning is successfully completed.)

Automatic tuning of the antenna should take no longer than 15 seconds. If you find a channel which takes more than 15 seconds to tune, recheck antenna length and ground.

Noise

Noise generated on board or by electrical storms can severely degrade communication. Storm- generated static, unfortunately, is impossible to suppress or eliminate. Radio traffic on lower frequency bands is sometimes completely blocked out in certain areas.

Man-made noise, however, can often be suppressed by a marine electronics technician, using special noise filtering and shielding techniques. In most cases the source of electrical noise is the ignition system, although generators, alternators, winches, pumps, radar and echo sounder can interfere with radio communication as well.

Turn on electrical equipment one by one to check for interference to the FS-1503.

Because no two boats are built or equipped exactly alike, there is no one general noise suppress- ing technique that can be applied to all cases. If electrical noise interferes with SSB operation, consult a marine electronics technician.

4.2 User Channel Registration

Register permitted frequencies, referring to the operator’s manual.

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