|
7
Radar system overview | Broadband 3G™ Radar Installation Guide
FMCW = Frequency Modulated Continuous Wave
The scanner transmits a ‘rising tone’ (Tx wave) with linearly increasing frequency. The wave
propagates out from the transmitter retaining the frequency it had when it was transmitted. If
it refl ects off an object, it will return to the receiver, still at the frequency it had when originally
transmitted.
Meanwhile, the transmitter continues to output an increasing frequency.
The diff erence between both the currently transmitted and received frequencies, coupled
with the known rate of frequency increase, allows a time of fl ight to be calculated, from which
distance is calculated.
Additional bene ts of FMCW radar are:
Safety-
low energy emissions. 1/10th of a mobile phone
safe operation in anchorages and marinas
instant power up. No warm up required
Short range performance -
broadband radar can see within a few meters of the boat, compared to pulse radars, which
can not see closer than 30 meters
higher resolution clearly separates individual vessels and objects
Up to fi ve times better sea and rain clutter performance
Low power -
suitable for small boats and yachts
easier installation with lighter cabling and smaller connectors
great for yachts on ocean passage
Instant power-up -
conventional radars take 2-3 minutes to warm up the magnetron: Safety – 2 minutes is a long
time if you are concerned about collision.
convenience – switch it on and use it.
Easy to use -
no constant adjusting required to obtain optimum performance
no re-tuning between ranges. Means fast range change at all ranges.
To Next Page
Loading...
Need help?
General
