Processing Facsimile Images; Phase Mismatch - Furuno FAX-30 Operator's Manual

2.5

Processing Facsimile Images

2.5.1

Phase 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.
1. With a facsimile image displayed (see paragraph 2.4), press the EDIT
IMAGE soft key.
2. Press the PHASE soft key.
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.
0 10
Dead sector
center at "15"
Example of phase mismatching
102N JMH 7305.0kHz IOC576 120rpm JUN/05 01:26
0
10
Facsimile image with dead sector
PHASE
Phase entry window
2. FAX OPERATION: NAVNET
20 30
Dead sector (can be white)
EDIT
IMAGE
30 40
20
PHASE
SYNC
NOISE
REJECT
EDIT
COLOR
RETURN
00
40
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