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RE: [Discuss-gnuradio] SDR 1000 progress
From: |
Ettus, Matt |
Subject: |
RE: [Discuss-gnuradio] SDR 1000 progress |
Date: |
Thu, 8 May 2003 10:44:04 -0700 |
> 1. In RX mode, the soundcard mixer is set to use line in for
> the IF, and
> in the radio the line out/speaker out (whichever you have)
> signal is routed
> to the speakers. The soundcard output is mapped to use wave out, and
> disable line in (otherwise, the speakers output the raw IF
> signal, which is
> interesting but not what we're looking for).
>
> 2. In TX mode, the soundcard mixer is set to use mic in, the
> mic plugs
> into the mic jack on the radio and is routed to the mic in
> connector on the
> soundboard, and line out/speaker out is used to deliver the IF to the
> radio. The speaker is out of the system at that point. The
> soundcardmixer
> is switched to send wav out to the line out/speaker out jack.
>
> So, Gerald is using switching both on the board and in the
> soundcard mixer
> to use a single card for both RX and TX functions. It's clearly a
> half-duplex system.
Ok. So there are 3 sound connectors used on the sound card. This presents
a problem for laptops which have only 2. Of course, my laptop doesn't have
a parallel port either.
Note to people designing hardware -- design for the interfaces computers
will have when the design is ready, not the computers you already have.
Parallel ports are going the way of the dodo, replaced by a combination of
USB, ethernet, and bluetooth.
Matt
- Re: [Discuss-gnuradio] SDR 1000 progress, (continued)
- RE: [Discuss-gnuradio] SDR 1000 progress, Ettus, Matt, 2003/05/08
- RE: [Discuss-gnuradio] SDR 1000 progress,
Ettus, Matt <=
- RE: [Discuss-gnuradio] SDR 1000 progress, Ettus, Matt, 2003/05/08
- RE: [Discuss-gnuradio] SDR 1000 progress, tongaloa, 2003/05/08