NIR-DSP-Filter ... What is this?

P

Papillon

New member
Joined
Mar 31, 2005
Messages
949
Reaction score
0
C Dory Year
1993
C Dory Model
22 Angler
Hull Identification Number
DOR22627I293
Vessel Name
Papillon
For us who are Audio, Ham, Stero....challanged can someone
explan what this device is that YukonChris put on his boat.

3035167_G.jpg

.......................Refcom Preselector,Stereo-System,Yaesu 5000 and NIR-DSP-Filter...........

While your at it, the rest of the stuff too.....The only thing I reconize is the record player and shortwave radio.



Thank You
 
I suspect that Chris will give you a better answer, but the Refcom preselector is like an antenna tuner. Basically you fool the reciever into seeing a resonate antenna. On a transmitter one can do this manually with an SWR meter, use an auto tuner or use an antenna analyzer, which actually sends out a very low RF signal and then analysis its swr. This does this manually by swithing capaciters to "tune" the antenna to each band.

The DSP is a digital signal processor. Basicaslly this is a filter, which cuts out unwanted frequencies--on ham and ssb signals there are both man made interference and natural interference--like from sun spots. With a DSP you can make very sharp cut offs of the actual signal. I have tried extrenal DSP's in the past, and they are helpful.

The Yaseau 5000 is a high quality reciever--and I suspect that Chris will use it for weather--I would prefer to have a full transciever, so one could talk to the rest of the world--and since ham radio licenses are easier than ever to get, would suggest that anyone going to remote areas have a ham set.

We have an Icom 7000. This transciever is very small, and can even be remote mounte, with just the face showing. It has built in DSP,s comperable to what the DSP Chris has. Its DSP are on the RF--radio frequency as the signal comes into the set, rather than just the audio output. We use an automatic tuner for frequencies other than the specific ham bands--where we use a tuned antenna (Ham Stick).

Question for Chris--are you gong to have a Ham radio transciever aboard also?

Regards,
 
Thank you Bob for the "Electronics for Dummies" class. I was almost ready to give up on the "Nerd Power" around here....until you posted. Thank you for restoring my faith in this forum.

and since ham radio licenses are easier than ever to get, would suggest that anyone going to remote areas have a ham set.
Click to expand...

Can you tell me the requirements today for the different class licenses for todays hams or point me to a link with that information?
 
Thank you: The best place to start is at the Amateur Radio Relay League: http://www.arrl.org/ You can search for nearby classes by zip code. There are also on line courses. The Morris code requirement is gone. There are a pool of questions, that you will have to memorize the answers to ahead of time. However I do suggest that a class as at a Junior college would be of value, since you would get some good theory, as well as just learning the answers. (Some on line courses also give good theory).

There are three classes of licenses. Technician, which basically limits in the voice frequencies to VHF and several other HF bands, as well as code on many other bands, the General, which does allow voice on SSB as well as VHF, and the Extra, which gives expanded bands in the entire spectrum.

Sample questions are at: http://www.qrz.com/testing.html

Another good resource is Gordon West: http://www.gordonwestradioschool.com/ Gordon had dedicated his life to teaching ham radio--mostly to boaters.
 
Thanks Bob, that is the information I was looking for and as usual you covered all bases.
 
Back
Top