In article ,
Charlie Morgan wrote:

On Wed, 27 Sep 2006 15:19:41 -0400, Wayne.B
wrote:

On Wed, 27 Sep 2006 14:11:43 -0400, Charlie Morgan wrote:

All I can tell you is what the manufacturer says, and they call the
two settings on my RADAR "Transmit blanking on" and "Transmit blanking
off"

It has always been my understanding (perhaps incorrectly) that
transmit blanking was offered as a safety feature where the scanner
was located too close to the helm position. If so, that would surely
indicate that the transmitter was being turned off, not the receiver.

In the manual for my RADAR they indicate that this feature is to turn
the transmit off during the period when it would be transmitting
directly into the mast on a mast mounted radome. That's all I can go
by. That's what the people who made it say about it. The manuals for
Furuno RADARs are available on their website for download if you want
to see it. Mine is model 1623. The transmit blanking feature is on
page 16 or 17, I think.

CWM

Furuno writes those USER Manuals, for USERS, not for the guy who
actually has to FIX them, or understand how they work, and why.
Transmitter Blanking is just another "Feature" that Furuno has
incorporated into their design, to give the digital displays a way to do
what wasn't really nessesary with the older second and third generation
analog Radar displays. It is just like when we went from 2nd generation
to 3rd generation, with Ring Circulators, replacing the older technology
Radioactive T/R Cells, and when we went from Crystal Mixers to MMIC
Technology in the 3rd to 4th generation change. You can thank Uncle Sam
for all this wonderous advancment, as it all came from Military and Space
Technology.

Bruce in alaska
--
add a 2 before @

Bushman,

I have a mast mounted radar, Raymarine 2kw, on a swivel to keep it
level while heeled. I don't experience any blank spots behind me. For
example, if there is land behind me, it is uninterrupted.

I do experience that many boats don't at all appear on my radar, from
any direction, (because they don't reflect enough energy) unless I
manually turn up my gain to 60%, which causes other things to appear.
If I had it to do again, I would get a 4kw radar so I can get a better
return from some of the smaller boats in our local waters.

I would also consider mounting the radar off my backstay. Then my jib
sail and spinnaker halyards would have one less thing to get tangled
around

Thanks Capt.
I was considering the hanging backstay mount but my backstay will soon be an
antenna. I would think that is a bad combo, maybe not.
- Allen

"b393capt" wrote in message
oups.com...
Bushman,

I have a mast mounted radar, Raymarine 2kw, on a swivel to keep it
level while heeled. I don't experience any blank spots behind me. For
example, if there is land behind me, it is uninterrupted.

I do experience that many boats don't at all appear on my radar, from
any direction, (because they don't reflect enough energy) unless I
manually turn up my gain to 60%, which causes other things to appear.
If I had it to do again, I would get a 4kw radar so I can get a better
return from some of the smaller boats in our local waters.

I would also consider mounting the radar off my backstay. Then my jib
sail and spinnaker halyards would have one less thing to get tangled
around