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RADAR - Logrithmic vs Linear Algorithm ???

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RADAR - Logrithmic vs Linear Algorithm ???

Old 04-02-2003, 11:29 AM
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Default RADAR - Logrithmic vs Linear Algorithm ???

Does anyone have any detailed information as to the difference between Logrithmic and Linear algorithms used in radar systems.

A salesperson told me that the "better" units use logrithmic algorithms in order to distinguish/seperate targets more clearly. That's about all I know and/or remember.

From what I was told the new Furuno Navnet 1823C (2kW) Radar/Chartplotter, which arrives in the States this week and I am waiting to receive, is the first 2Kw radar in their lineup to use logrithmic algorithms. The head unit is identical to the 1833C, except for the fact that it uses a 2kW antenna instead of 4kW. According to the distributor, my wait has been long to receive it because Furuno had to redisgn and build this first of it kind 2kW logrithmic radar antenna.

What do you think, is this just hype or is this truly a better product than the other 2kW radars?

Thanks,

Wayne
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Old 04-02-2003, 11:32 AM
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Default RADAR - Logrithmic vs Linear Algorithm ???

Give the boys at www.consumersmarine.com a call. Tell us what they say.

Boston Whaler, "MUMBLER", 24' Outrage (1996), twin 175 HP Evinrude Ocean Pros. Snowball, the cat...
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Old 04-02-2003, 11:50 AM
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Default RADAR - Logrithmic vs Linear Algorithm ???

Consumers Marine is where I have the unit on order, and they are the folks that told me this.
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Old 04-02-2003, 02:27 PM
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Default RADAR - Logrithmic vs Linear Algorithm ???

I believe the are saying they control the gain of the receiver logarithmically rather than linearly.

As time increases (I.E. distance from the boat), the gain of the receiver is increased to compensate for the weaker return signal. Several ways to do it, log, or linear, or even more complex algorithms can be used.

They're not the first by the way, not by a long shot.
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Old 04-02-2003, 04:47 PM
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Default RADAR - Logrithmic vs Linear Algorithm ???

Is it the first for a 2kW unit? From what I was told, it was definitely the first for Furuno in that class
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Old 04-02-2003, 05:23 PM
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Default RADAR - Logrithmic vs Linear Algorithm ???

I've never had Consumer's lie to me yet.

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Old 04-02-2003, 05:54 PM
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Default RADAR - Logrithmic vs Linear Algorithm ???

Lemmie rephrase that a bit.

It may be their first attempt at using a log gain profile, but they certainly didnt invent it.
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