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Re: [linrad] audio channels
- Subject: Re: [linrad] audio channels
- From: "Rein A. Smit" <rein0zn@xxxxxxxxxxxxxxxxx
- Date: Wed, 21 May 2003 14:34:16 -0700
It depends on whether you have 1 or 2 mixers. With one mixer you
can go with one stereo sound card plus another card for audio output.
With a dual antenna, as for polarity systems, you need 4 audio
inputs and for a number of other good reasons, you might as well
go DELTA 44 sound board with 4 inputs plus another card for audio
output also stereo.
You could however use 2 regular stereo cards for the front end and
an additional stereo card for audio output. The max sample freq of
audio card and ADC resolution effect the max freq band you can
monitor and dynamic range etc.
I believe either Leif or Roger had that at one time and Linrad is
able to work with these 3 cards.
You like, probably, the front end cards to sample at a much higher
rate then the audio output card.
I believe the DELTA44 card is still up to this point the best
solution -for the cost/performance ratio.
You will have to work through Leif's and Roger's pages to
see the relations between bandwidth and performance of the receiver.
There are 2 QEX ( ARRL ) papers and they are on the net. The papers
cover in great detail the different combinations. ( Not quite sure
whether it needs ARRL membership access ot not ) If you can't
get it, there are ways.
This is at least, the way I understand it.
Arie Dogterom wrote:
> My question probably has been answered in some of the texts, but I a still
> unsure :
> Having the mixers with the I an Q outputs, where shall those go : Does one
> need two soundcards or is it possible to use the left and right channels of
> a stereo card?