RE: [linrad] Delta 44 question

["Robert McGwier" <rwmcgwier@xxxxxxxxxxxxxxx]

Excellent.  So this seems to imply a sigma delta sampler to overcome the
aliasing, etc.

Thanks for the information.

Bob


-----Original Message-----
From: owner-linrad@xxxxxxxxxxxxxxxxxxxxxx
[mailto:owner-linrad@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of Leif Åsbrink
Sent: Friday, June 04, 2004 1:03 AM
To: linrad@xxxxxxxxxxxxxxxxxxxxxx
Subject: RE: [linrad] Delta 44 question



> What is the widest real bandwidth the Delta 44 will do?  The
> box gives 22 Khz but I know it is wider than that.  Does it
> switch with different sampling rates?
It will do 48 kHz for each channel.

The actual sampling is done at a high rate. I think it is 64 times
faster than the nominal sampling speed of 96 kHz. The A/D converter
contains a digital filter that is very steep and that cuts just
above the Nyquist frequency before it reduces the sampling rate
from 6.1 MHz (or whereever it is) down to what you have specified.

73

Leif / SM5BSZ






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