ring if you
have two radios that perform equally poor, and especially with respect to phase
noise.
73, will, wj9b
CWops #1085
CWA Advisor levels II and III
http://cwops.org/
On Tue, 6/4/19, Wayne Burdick wrote:
Subject: [Elecraft] K4: superhet vs. di
Which is interesting. We were taught that you can recover signals up to the
Nyquist frequency (half sampling frequency) before aliasing becomes an
issue. People low pass filter well before then to avoid aliasing issues,
but it means you need a sampling frequency sufficiently more than twice the
On 05/06/2019 13:23, W2xj wrote:
Direct sampling has no image issues.
That's because they are called aliasing issues!
--
David Woolley
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Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
I was getting confused momentarily with Direct Conversion :-)
On Wed, 5 Jun 2019 at 13:23, W2xj wrote:
> Direct sampling has no image issues.
>
> Sent from my iPad
>
> > On Jun 5, 2019, at 3:23 AM, Richard Corfield
> wrote:
> >
> > I'd have thought that superhet would always have the advantage
Direct sampling has no image issues.
Sent from my iPad
> On Jun 5, 2019, at 3:23 AM, Richard Corfield
> wrote:
>
> I'd have thought that superhet would always have the advantage of improved
> image rejection due to the IF band filtering. It would also allow ADCs and
> associated processing to
Of Clay Autery
Sent: Wednesday, June 5, 2019 12:05 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K4: superhet vs. direct sampling
Was thinking the very same thing but I am not so sure I will be able to
let my K3S go... I may just be adding... And then I can make the K3S a
traveling
I'd have thought that superhet would always have the advantage of improved
image rejection due to the IF band filtering. It would also allow ADCs and
associated processing to run slower or lower down in relation to its
Nyquist frequency so allowing for more detail in the sampled signal. Also
can
e Burdick
Sent: Tuesday, June 4, 2019 9:19 PM
To: Elecraft Reflector
Subject: [Elecraft] K4: superhet vs. direct sampling
The superhet module buys a lot of BDR improvement. But also -- a subtlety I've
failed to mention so far -- the superhet module is intended to somewhat improve
2 kHz IMD
ailman.qth.net On
Behalf Of Wayne Burdick
Sent: Tuesday, June 4, 2019 9:19 PM
To: Elecraft Reflector
Subject: [Elecraft] K4: superhet vs. direct sampling
The superhet module buys a lot of BDR improvement. But also -- a subtlety I've
failed to mention so far -- the superhet module is intended to somew
The superhet module buys a lot of BDR improvement. But also -- a subtlety I've
failed to mention so far -- the superhet module is intended to somewhat improve
2 kHz IMDDR3 *and* make this figure more repeatable.
Q: Say what?
A: As Rob Sherwood noted many times before finally immortalizing
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