RE: [linrad] RE; Dynamic range, and frequency control

["Dan Hammill" <kb5my@xxxxxxxxxxxx>]

Hi Roger,

I have a suggestion re. using the NI GPIB in your WindBlowz
machine for auto-control with Linrad.  Treat the Microsoft
box with the NI card as a RS-232 controlled instrument by
writing a small VB or C app (or LabVIEW, or HP VEE, etc.)
that takes serial commands from the Linrad machine via
RS-232, then routes them to the signal generator via GPIB.
Do just the reverse if you want to get a response from the
sig gen with Linrad.  Same goes for any other I/O hardware
that works under Windoze but not under Linux.

I've actually done something very similar to this in my
professional life, and it worked very well.  The bad news
is that I was a good boy and didn't take the code home
with me when I left that company several years ago.  In
retrospect, that company no longer exists, but I still do,
so I guess it really wouldn't have mattered to anyone but
me in the long run.

I also have a NI AT-GPIB board, so I guess there really is
a good reason to keep my old ISA/PCI Pentium machines.

73,
Dan  KB5MY

-----Original Message-----
From: owner-linrad@xxxxxxxxxxxxxxxxxxxxx
[mailto:owner-linrad@xxxxxxxxxxxxxxxxxxxxx]On Behalf Of W3SZ
Sent: Monday, November 18, 2002 10:14
To: linrad@xxxxxxxxxxxxxxxxxxxxx
Subject: [linrad] RE; Dynamic range, and frequency control



<snip>

Leif's hardware.c note means that those us of using PTS synthesizers for
our LO could now incorporate frequency control of those into Linrad,
instead of running a separate control program.  However we would need to
rewrite the control section to use parallel port with PTS pinouts, or
for GPIB, or use serial to GPIB or serial to parallel converters.  I
have a National Inststruments GPIB board, but it is ISA and for Windows
and DOS, and so I can't use it directly with Linrad.  I currently have
it running on another computer and just switch to that keyboard to QSY
to another 96 KHz segment of the band.


73,

Roger Rehr
W3SZ   FN20ah
2 Merrymount Road
Reading, PA  19609-1718
http://www.qsl.net/w3sz



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