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Re: [linrad] Mirroring of Waterfall
- Subject: Re: [linrad] Mirroring of Waterfall
- From: w3sz@xxxxxxxxxxx
- Date: Sat, 06 Mar 2004 23:41:34 +0000
Well after I had a chance to think I became less stupid [I think].
My recollection is that I needed the display direction to be the opposite of what it was, due to how i was doing my lo injection. So when I wrote the LinFT routine 'users_hwaredriver.c', I added a statement:
fg.passband_direction = 1;
Which is fairly early in the user program. I am pretty sure that putting this in caused the mirroring you saw. Try commenting it out and see what happens.
If that doesn't work, try setting it to '0', or to '-1'. I forget the list of values leif allowed.
It is documented somewhere, but I can't find it here at 'hilltop manor.' I can't wait till i have the wifi link established to the house. Dialup here isn't fun, either ;)
-roger rehr, w3sz
> I am trying to write a user defined routine so I can control my Kenwood
> I took the user.c program made a minor change to it and copied it to
> user_hwaredriver.c and did ./clean ./configure and a make.
> When I ran linrad, and tried to copy cw, I found the spectral data was
> between 20 KHz and 24 KHz, apparently mirroring around 1/2 my sample
> frequency of 48 KHz. Spoke to Roger W3SZ about this and he said it might be
> a problem with the "Frequency Selection Box"
> Any ideas?
> Sigurd KJ1K