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Post by Boomzilla on Jan 2, 2021 12:08:28 GMT -5
Lacking any formal electronics test gear, and living in the 21st Century age of miracles, I wondered if any of youse guys happen to know of an electronics analysis app for the iPhone that would:
Measure the power output of an amplifier at a specified percentage of clipping
Measure the frequency bandwidth of a preamplifier or amplifier with a +/- tolerance
Measure the percentage of noise and distortion of a preamplifier or amplifier
Preferably, the app could not only generate the test signals but also simultaneously analyze the amplifier output. I have a UMIK-1 calibrated microphone with USB output, a laptop computer (if the iPhone won't suffice), and can build resistor dropping networks for output measurement.
Any suggestions?
Boom
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Post by audiobill on Jan 2, 2021 13:22:55 GMT -5
Boy, that would be cool!
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DYohn
Emo VIPs 
Posts: 18,489
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Post by DYohn on Jan 3, 2021 10:24:40 GMT -5
So you want an Audio Precision APx555 on your iPhone? Good luck.
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Post by Ex_Vintage on Jan 3, 2021 22:43:10 GMT -5
Lacking any formal electronics test gear, and living in the 21st Century age of miracles, I wondered if any of youse guys happen to know of an electronics analysis app for the iPhone that would: Measure the power output of an amplifier at a specified percentage of clipping Measure the frequency bandwidth of a preamplifier or amplifier with a +/- tolerance Measure the percentage of noise and distortion of a preamplifier or amplifier Preferably, the app could not only generate the test signals but also simultaneously analyze the amplifier output. I have a UMIK-1 calibrated microphone with USB output, a laptop computer (if the iPhone won't suffice), and can build resistor dropping networks for output measurement. Any suggestions? Boom You can get a data acquisition add on for a laptop or PC. You would need current / voltage probes for power measurements. In order to determine THD (clipping) you would need dedicated software that could do the comparison of input / output signals for THD and do the bandwidth measurements. Of course you would need to have very high accuracy in the voltage measurements and a precision source to set or sweep the input frequencies. Also, in order to publish any measurements the equipment would have to be calibrated to NIST standards (otherwise comparative measurements would only be relative). Pretty tall order. Maybe a 2nd hand DSO and frequency source would be better for relative measurements. |
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Post by garbulky on Jan 4, 2021 0:03:05 GMT -5
I think the closest thing you'll have is basically what amounts to a standalone tester with smartphone functionality - like it'll upload the results to a cloud and then you can access it on the iphone. This doesn't simplify it down to an iphone so it may not be what you want.
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Post by 405x5 on Jan 4, 2021 9:45:45 GMT -5
Lacking any formal electronics test gear, and living in the 21st Century age of miracles, I wondered if any of youse guys happen to know of an electronics analysis app for the iPhone that would: Measure the power output of an amplifier at a specified percentage of clipping Measure the frequency bandwidth of a preamplifier or amplifier with a +/- tolerance Measure the percentage of noise and distortion of a preamplifier or amplifier Preferably, the app could not only generate the test signals but also simultaneously analyze the amplifier output. I have a UMIK-1 calibrated microphone with USB output, a laptop computer (if the iPhone won't suffice), and can build resistor dropping networks for output measurement. Any suggestions? Boom These connect to phone via inductive pickup to evaluate and detect issues  |
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