Furuno FAX-30 manual Processing Facsimile Images, Phase mismatch, Example of phase mismatching

2. FAX OPERATION: NAVNET

2.5Processing Facsimile Images

2.5.1Phase mismatch

When the FAX-30 starts receiving a broadcast already in progress, or noise prevents detection of the phasing signal, the image may be divided into two parts by a thick black (or white) stripe called a dead sector. This phenomenon is due to phase mismatching. When this occurs, correct phase mismatching, after the facsimile has been received.

0 10 20 30 40

Dead sector (can be white)

Dead sector center at "15"

Example of phase mismatching

1.With a facsimile image displayed (see paragraph 2.4), press the EDIT IMAGE soft key.

102N JMH 7305.0kHz IOC576 120rpm JUN/05 01:26

0 10 20 30 40

EDIT

IMAGE

PHASE

SYNC

NOISE

REJECT

EDIT

COLOR

RETURN

Facsimile image with dead sector

2. Press the PHASE soft key.

PHASE

▲

00

▼

Phase entry window

3.Read the scale to find the center of the dead sector and enter it in the phase entry window. For example, in the illustration above the dead sector is centered at "15" on the scale, so you would enter “15”. The setting range is 00 to 40.

4.Press the ENTER soft key.

5.Press the RETURN soft key several times to return to the standby display.

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