Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

LF: WOLF test results, soundcard trouble

To: [email protected]
Subject: LF: WOLF test results, soundcard trouble
From: "Talbot Andrew" <[email protected]>
Date: Tue, 24 Apr 2001 16:28:56 +0100
Reply-to: [email protected]
Sender: <[email protected]>
An alternative to the SD interface is my PIC based one, which is
directly compatible and uses just two ICs one of them an op-amp.

Andy  G4JNT
Rik's idea of bypassing the card is another good solution.
One alternative that already exists is the VE2IQ interface.  See
http://cafe.rapidus.net/bill1/bbs.htm and download SDPCX.ZIP .
This is a home brew Sigma-Delta A/D which drives a serial port.
Many PSK and CCW programs can use it, and it has also been used with WOLF.
You can buy kits from Bill for US$54, or build your own from scratch.
Sample rate is a precise 7200 Hz.  Resolution is only 8 bits,
but IMO that is plenty, unless the audio signal is dominated
by a strong interfering carrier.  If most of the audio power is
random noise and/or static crashes, then even 1 bit is pretty good!
Steve VK2ZTO has shown impressive results sampling this way.



--
The Information contained in this E-Mail and any subsequent correspondence
is private and is intended solely for the intended recipient(s).
For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is
prohibited and may be unlawful.


<Prev in Thread] Current Thread [Next in Thread>