Operation Manual

RTTY and SITOR-FEC signals consist of two tones, which

alternate uninterruptedly in the rhythm of the information

The two tones can be so close together that the depiction

in the display merges. This gives the following picture:

An interference free reception of a station is not always

possible. This is why disturbing signals as well as the required

signals are visible on the display.

* The basic FAX set-up menu appears as follows:

PRINT: NORMAL (BLACK on a WHITE background)

SYNC: +0 (picture will be printed vertically)

RPM: 120 (95% transmissions are at 120rpm)

LEVEL: 1500 (level value for black/white)

STATUS: WAIT (adjusts itself automatically to SYNC on

receiving the start impulse from the

station and through synchronisation

signaltoPRINT).

In all decoding modes, in the top left and right hand

corners of the display header, there are numbers visible.

These are the utility frequencies of the signal processor, as it

is active even in the stand-by mode for decoding of

NAVTEX signals. The number on the left is the lower

frequency and right higher. In the MORSE and FAX modes,

both values are equal. Morse uses only one tone signals and

FAX uses the white picture level value. In RTTY and SITOR

(NAVTEX), two signal tones are displayed. The distance

between corresponds to the frequency shift of the station.

FSK