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- Newsgroups: rec.radio.amateur.misc
- Path: sparky!uunet!cs.utexas.edu!torn!csd.unb.ca!news.ucs.mun.ca!kean.ucs.mun.ca!jcraig
- From: jcraig@kean.ucs.mun.ca
- Subject: Re: DSP and The Future
- Message-ID: <1993Jan22.153031.1@kean.ucs.mun.ca>
- Followup-To: rec.radio.amateur.misc
- Lines: 30
- Sender: usenet@news.ucs.mun.ca (NNTP server account)
- Organization: Memorial University. St.John's Nfld, Canada
- References: <1993Jan22.155944.22008@magnus.acs.ohio-state.edu>
- Date: Fri, 22 Jan 1993 18:00:31 GMT
-
- In article <1993Jan22.155944.22008@magnus.acs.ohio-state.edu>, wvhorn@magnus.acs.ohio-state.edu (William VanHorne) writes:
-
- .
- .
- .
- > My questions for the net:
- >
- > Given the *current* state of DSP technology, why do we need all those reception
- > aids? Why do we need multiple IF stages with filtering? For that matter,
- > why the heck do we even need to continue to use super-het receivers at all?
- > Couldn't we simply go to direct conversion with DSP processed audio? If we
- > can, why are we still paying $2000-$3000 for transceivers with all that
- > expensive super-het stuff tacked on? Why haven't the manufacturers started
- > producing cheaper receivers with DSP working on the audio? What have I
- > missed? Am I asking too many questions?
- >
- > ---Bill VanHorne
- >
- It's easier to amplify RF at a single frequency than a band of freqs.
- This single freq. is the IF in the superhet.
- DSP on the audio will do nothing for spurious mixing products, though. But if
- you could DSP the IF then you'd have some receiver! Better yet,
- put a broad band amp between your antenna and a DSP that could sample
- at say 100 MHz...
-
- It's probably only a matter of time before they'll make ultra fast
- DSP's and analogue radio technology will be stashed away with the
- pentagrid converters and coherers!
-
- Joe VO1NA, top band CW junkie.
-