EMRFD Message Archive 11951
Message Date From Subject 11951 2015-12-06 16:14:50 Rod KST data plotting for filter sweeps Hi All,
There is a very powerful data plotting program called KST. It is
available for Windows and Linux.
It offers a wide array of data visualization tools.
I have uploaded a zip file of some crystal filter sweeps using KST
software, called filter-pix.zip.
It is worth taking a look at those pix.
The data was generated by a homebrew scalar network analyzer and sent
over a serial link
to the PC for logging. A companion program on the PC put the data into
KST friendly files.
Then I manually ran KST to create the plots you see.
The impetus for this project was that I wanted to improve my homebrew
crystal filters, and
had no method of accurately recording filter sweeps. I needed to record
them for the purpose of comparing filter "improvements", so I built the
hardware and the software to do so.
The homebrew scalar network analyzer (SNA) is an Arduino running an
and a W7ZOI power meter circuit feeding analog into the Arduino, which
the data and sends it on a serial port to the PC.
If there is some interest, I will release the software under a GNU
license, along with
hardware notes. If one has the skills to build a high performance
receiver, one certainly
has the skills required to build the SNA. It is actually a lot easier
than building a high-perf
receiver. And all of it was done with discrete parts and .1 inch center ICs.
I hope you take a moment to look at the plots- they will give you an
idea of what can be done.
(BTW- the gobbledy-gook on the Hz scale below is on the to-do list of
things to fix!)
11952 2015-12-06 22:34:04 Ashhar Farhan Re: KST data plotting for filter sweeps