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Author Topic: Ic 7610 roofing  (Read 1464 times)
KE7EOZ
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Posts: 212




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« on: September 14, 2017, 02:48:56 PM »

Does anyone know if the ic 7610 will have roofing filters cause I have not read anywhere if it will have selectable roofing filter . Just to see if is a better option that one of the recent radios that offer them thanks
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KB4QAA
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Posts: 3256




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« Reply #1 on: September 14, 2017, 06:46:12 PM »

A true fully SDR radio doesn't need roofing filters.  Everything is handled in the software.   It is still common to see bandpass or pre-selector filters to reduce overload and improve selectivity before the A-D input stage.
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KB4QAA
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« Reply #2 on: September 14, 2017, 06:50:23 PM »

Quote:
Quote
Receivers
Independent direct sampling receivers capable of receiving two bands/two modes simultaneously.
DIGI-SEL pre-selector for enhanced interference rejection.
Digital IF filter and digital twin PBT for interference rejection.

http://www.icomamerica.com/en/products/amateur/hf/7610/default.aspx
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KE7EOZ
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Posts: 212




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« Reply #3 on: September 14, 2017, 08:14:52 PM »

So that means the k3s is not full sdr
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WA3SKN
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« Reply #4 on: September 15, 2017, 07:03:39 AM »

If you want good filtering, just order up your Hilberling.

-Mike.
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KB4QAA
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« Reply #5 on: September 16, 2017, 04:42:45 PM »

So that means the k3s is not full sdr
Take a look at the block diagrams of most of the big manufacturers "SDR" radios and you will be surprised what you find!

Full SDR's don't have oscillators or mixers or IF's.

To be fair, they are stepping stones on the development and application of SDR to the radio industry.   The advertising folks tend to exaggerate.   

We are in an exciting era of radio development that parallels the 1920's and 30's that saw Regenerative, Super-Regenerative, Neutrodyne, Heterodyne and Superheterodyne methods.
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