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Search found 12 matches

by Positron
June 7th, 2016, 6:08 pm
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: Retrieve magnitude of individual harmonic (Page 2-38 of User Manual)
Replies: 2
Views: 11534

Re: Retrieve magnitude of individual harmonic (Page 2-38 of User Manual)

Ok. I'll try and get my hands on a gpib to usb cable and attempt to use this functionality.
by Positron
December 7th, 2015, 9:05 pm
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: Retrieve magnitude of individual harmonic (Page 2-38 of User Manual)
Replies: 2
Views: 11534

Retrieve magnitude of individual harmonic (Page 2-38 of User Manual)

Could you please provide further information on performing this operation. Taken from manual. " The 2015 can return the levels of individual harmonics (relative to the level of the fundamental, in dB). The parameters for this command are the starting and ending harmonics. Specify 2,3 for the second ...
by Positron
September 23rd, 2015, 9:37 pm
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: IVy App
Replies: 2
Views: 11484

Re: IVy App

You guys just want me to buy an SMU. ;)
by Positron
September 22nd, 2015, 5:58 pm
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: THD Measurement with 2015
Replies: 7
Views: 23025

Re: THD Measurement with 2015

Could you please answer this question.
Is this measurement of 0.005% to 0.01% the limitation of the distortion analyzer, or is this the true measured performance of the signal generator?
I hope the signal generator has better specs than this.
by Positron
September 22nd, 2015, 5:40 pm
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: IVy App
Replies: 2
Views: 11484

IVy App

Is it possible to use the IVy App with the 2015 THD?

http://www.keithley.com/products/software/ivy
by Positron
September 10th, 2015, 8:07 pm
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: THD Measurement with 2015
Replies: 7
Views: 23025

Re: THD Measurement with 2015

I have tested the output of the function generator on my scope and the signal is 100% perfect and stable. When hookup my Siglent functiongenerator to the 2015 THD readout is 0,07% for 1 1kHz input signal and this is in my opinion to low according to the specs of the Siglent functiongenerator. Anyon...
by Positron
September 10th, 2015, 7:10 pm
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: THD Measurement with 2015
Replies: 7
Views: 23025

Re: THD Measurement with 2015

Yes. I also carried out the test of measuring THD according to the manual. I get between 0.005% and 0.010% THD but the measurement is bouncing around like crazy between those figures. Is the jumping normal?
Is there any way to smooth the response time?

Settings
HIZ
1 kHz
1 Vrms
2 Harnonics
by Positron
September 10th, 2015, 6:40 pm
Forum: Series 2015 & 2016 THD/Audio Analyzers
Topic: Output of Nulled Waveform to Oscilloscope
Replies: 2
Views: 11480

Output of Nulled Waveform to Oscilloscope

Hi
I have a Keithley 2015 THD.
Is it possible to send the output of the nulled waveform to an oscilloscope?
I want to see the residual waveform on an oscilloscope (I want to see the harmonic waveform).
Hope this makes sense.
Thanks
by Positron
September 30th, 2009, 11:35 am
Forum: Other or Discontinued Oscilloscopes
Topic: 535 8kv high voltage drops while sweeps lengthens
Replies: 2
Views: 92461

Re: 535 8kv high voltage drops while sweeps lengthens

Well I got the scope repaired. I found and replaced leaky/low capacitance C802 (2 X 20uf cap), and found leaky capacitor to grid of output tube (.001uf 600v). Also replaced leaky capacitor across HV transformer primary (.01uf 400v). All problems are resolved. Hope this helps others with 535A, 545A s...
by Positron
September 27th, 2009, 8:24 pm
Forum: Other or Discontinued Oscilloscopes
Topic: 535 8kv high voltage drops while sweeps lengthens
Replies: 2
Views: 92461

Re: 535 8kv high voltage drops while sweeps lengthens

I performed some testing and found that the +325 unregulated volt supply drops to below 300 volts (after 390 ohm two watt series resistor). The same symptoms continued with the horizontal sweep continuing to lengthen while the sweep darkens (presumably from HV dropping). I replaced a very leaky C802...
by Positron
September 26th, 2009, 12:22 pm
Forum: Other or Discontinued Oscilloscopes
Topic: 535 8kv high voltage drops while sweeps lengthens
Replies: 2
Views: 92461

535 8kv high voltage drops while sweeps lengthens

Hello Everyone, I have a 535A that was working great but just started giving problems. After warm up, the horizontal sweep line drops in intensity to near zero trace, gets very dim and loses focus. At the same time the filaments on the 8kv rectifiers dim noticably, I take it the 8kv is dropping. Fin...

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