Additional Benefi Ts Of Fmcw Radar Are - Lowrance Broadband 3G Installation Manual

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 dis-
tance is calculated.

Additional benefi ts of FMCW radar are:

Safety
• low energy emissions. 1/5th 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
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