Calibrated Si570 control for quisk 3.5.0
- Hi all,
For those of you (like me) using quisk with a SoftRock
Si570-controlled radio via a DG8SAQ-style controller which does not
compensate for the Si570's internal crystal deviation (if your WWV
isn't at 5.0 and 10.0MHz on the dot, I'm talking to you!), I have
attached a patch to quisk 3.5.0 which compensates for this error.
If you're not using quisk, or you're not using a Si570 device with USB
control, or your WWV is where it belongs, this message is not for you!
To apply this patch to your quisk, go to your quisk 3.5.0 source
directory and run:
patch -p1 < si570_direct_control.diff
You will then have to enable the patch, by setting some values in your
si570_direct_control = True
si570_xtal_freq = 114285000
The precise value for si570_xtal_freq depends on your particular Si570
device. You currently must use the usbsoftrock utility to retrieve
this frequency. To do so, run:
This will return a frequency (in MHz), which represents the internal
crystal frequency of your Si570 device. It should be something in
the neighborhood of 114.285 MHz. Convert it to Hz and place it in
si570_xtal_freq in place of the 114285000 above.
With these changes in place, you should find that your quisk frequency
display tracks on the nose.
If you have any problems with this patch, or any questions about how
to use it, or any comments about what I screwed up (related to this
patch only!), please Cc: me directly. I do not receive push updates
from this list, so it might otherwise be a while before I notice your