Bedienungsanleitung Furuno 1622 (Seite 26 von 35) (Englisch)

596216

Zoom out

Zoom in

Vorherige Seite

1/35

Nächste Seite

Radar bandwidth

This is normally matched to the radar

pulselength and is usually switched with the

range scale and the associated pulselength.

Narrow bandwidths of 3-5 MHz are used with

long pulses on long range and wide bandwidths

of 10-25 MHz with short pulses on short ranges.

Any radar bandwidth of less than 5 MHz will

attenuate the SART signal slightly, so it is

preferable to use a medium bandwidth to ensure

optimum detection of the SART.

Radar side lobes

As the SART is approached, sidelobes from the

radar antenna may show the SART responses

as a series of arcs or concentric rings. These

can be removed by the use of the anti-clutter

sea control although it may be operationally

useful to observe the sidelobes as they may be

easier to detect in clutter conditions and also

they will confirm that the SART is near to the

ship.

Gain

For maximum range SART detection the normal

gain setting for long range detection should be

used, that is, with background noise speckle

visible.

STC control

For optimum range SART detection, this control

should be set to the minimum. Care should be

exercised as wanted target in sea clutter may be

obscured. Note also that in clutter conditions the

first few dots of the SART response may not be

detectable, irrespective of the setting of the

anti-clutter sea control. In this case, the position

of the SART may be estimated by measuring

9.5 nm miles from the furthest dot back towards

own ship.

Some sets have automatic/manual anti-clutter

sea control facilities in which case the operator

should switch to manual.

FTC control

This should be used normally (to break up areas

of rain) when trying to detect a SART response

which, being a series of dots, is not affected by

the action of the anti-clutter rain circuitry. Note

that Racon responses, which are often in the

form of a long flash, will be affected by the use

of this control.

Some sets have automatic/manual anti-clutter

rain control facilities in which case the operator

should switch to manual.

When the range to the SART is reduced to

about 1 nm, the radar display may show also the

12 responses generated during the fast sweeps.

These additional dot responses, which also are

equally spaced by 0.64 nm, will be interspersed

with the original line of 12 dots. They will appear

slightly weaker and smaller than the original

dots.

General procedure for detecting

SART response

1. Use the range scale of 6 or 12 nm as the

spacing between the SART responses is

about 0.6 nm (1125 m) to distinguish the

SART.

2. Turn off the automatic clutter suppression.

3. Turn off the Interference Rejector.

General remarks on receiving SART

SART range errors

When responses from only the 12 low frequency

sweeps are visible (when the SART is at a

range greater than about 1 nm), the position at

which the first dot is displayed may be as much

as 0.64 nm beyond the true position of the

SART. When the range closes so that the fast

sweep responses are seen also, the first of

these will be no more than 150 meters beyond

the true position.

Radar bandwidth

This is normally matched to the radar

pulselength and is usually switched with the

range scale and the associated pulselength.

Narrow bandwidths of 3-5 MHz are used with

long pulses on long range and wide bandwidths

of 10-25 MHz with short pulses on short ranges.

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Furuno 1622 Seite 26

Brauchen Sie Hilfe? Stellen Sie Ihre Frage.

Missbrauch melden von Frage und/oder Antwort

Art des Missbrauchs:

Forenregeln

Neu registrieren

Andere Handbücher von Furuno 1622

Das Handbuch wird per E-Mail gesendet. Überprüfen Sie ihre E-Mail.

Ihre Frage wurde zu diesem Forum hinzugefügt

Info