Category Archives: Instruments

Thermocouple meter and datalogger

Posted on 3 October, 2020 by Thomas S. Knutsen

I have designed a thermocouple meter for use for obtaining temperature readings from thermocouples. Its used together with the thermal chamber described elsewhere on this site. The design is done primarily as a programmable instrument, but it has a OLED … Continue reading →

Posted in Instruments, Temperature | Tagged , | 1 Comment

NIST on phase detectors and some verification.

Posted on 26 December, 2018 by Thomas S. Knutsen

NIST has some interesting articles on their website, one of them being a 5 MHz phase detector with low residual flicker [1] for measuring phase noise.  This spurred some discussions and a series of measurements on my part. The interesting … Continue reading →

Posted in Instruments, Phase Noise | Leave a comment

Homemade thermal test chamber

Posted on 30 March, 2018 by Thomas S. Knutsen

Some time back (2016 timeframe) I built a test chamber out of an inexpensive freezer, after having several project that required taking some thermal data over the expected useable range.  I was looking for a used laboratory freezer that goes … Continue reading →

Posted in Instruments, Uncategorized | Leave a comment

IMD measurment generator

Posted on 8 October, 2014 by Thomas S. Knutsen

IMD or Intermodulation distortion testing is in RF systems usually done with 2 signal sources, quite close in frequency, and one determines the level of the unwanted responses. The actual measurement procedure is shown quite well other places in the … Continue reading →

Posted in IMD, Instruments, OSH, Uncategorized | 2 Comments

open T-check

Posted on 16 February, 2014 by Thomas S. Knutsen

As of 24 mar 2018, I will no longer do any updates to the T-check program, I reccomend you try out KE5FX’s GPIB toolkit, as this has a similar program. Ok, since this blog seems to be about the software … Continue reading →

Posted in Instruments, Network Analyzer, T-check, Uncategorized, VNA | Leave a comment

Rigol oscilloscope waveform software

Posted on 13 December, 2013 by Thomas S. Knutsen

If you follow me on twitter, you may know that I have written an small application that  obtains the waveforms from the oscilloscope and plots it to an graph. The orginal software and driver from Rigol did not work as … Continue reading →

Posted in Instruments, Oscilloscope, Rigol, Time domain | Tagged , , , | 1 Comment