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Entry  Sat Mar 17 14:32:05 2018, Stella, Misc, Electronics Equipment, Phase Noise for 21.5 MHz Sine Wave RIGOLPhasenoise_Spectra.pdf
    Reply  Mon Mar 19 13:09:43 2018, awade, Misc, Electronics Equipment, Phase Noise for 21.5 MHz Sine Wave 
Message ID: 2146     Entry time: Mon Mar 19 13:09:43 2018     In reply to: 2143
Author: awade 
Type: Misc 
Category: Electronics Equipment 
Subject: Phase Noise for 21.5 MHz Sine Wave 

Great, it looks like you've got your setup working.

A few things about eloging, though. More information is almost always better. It would be good to add a bit more about your setup so that people know what you actually did and so you can repeat it if you come back in the future to look at your posts.

Maybe you can add another post with a schematic of your experiment labeled with part numbers, frequencies, power levels etc: everything somebody else would need if they were to do the build they same setup. Elog also has the ability to include latex markup which is handy for posting a few key equations.  For example, there are a few Rigol function generators, I find it helpful in the elogs I make to explicitly include part numbers and also hyperlink those labels to the website/datasheet of those components.  You want to actually explain what you did in some detail; some people use dot points, others write full sentences and paragraphs.  The main thing is you include lots of context and useful information about what happened.

With the plot, it looks ok, but you want to increase the font sizes and include units on the y-axis.  I'm not really sure what measurement you made was. It says its a transfer function but it should be in units that make sense like rad/sqrtHz or Hz/sqrtHz. Craig is good at making plots in python maybe have a chat to him about how to make nice plots.

Quote:

The Phase Detector method was used to measure the phase noise of the 21.5 MHz Sine Wave generated by the RIGOL Waveform Function Generator. Noise measurements were taken using the SR785 across frequencies spanning 0.25 Hz to 102.4 kHz.

 

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