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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => LAB Subwoofer Forum => Topic started by: Montez Carter on June 08, 2015, 11:09:40 pm

Title: Recommendations for Oscilloscope
Post by: Montez Carter on June 08, 2015, 11:09:40 pm
I am looking for a decent Oscilloscope to perform some Power Amplifier measuring on some dummy loads. I am looking on purchasing new Sub amps and I would rather look at what they are doing and listen to what they are doing to test on rated power on some of the newer light weight offerings. It's been way to long since ITT so if someone can recommend something decent not overly priced for that purpose it would be appreciated as I am seeing some PC options but have not researched enough on those.

Thanks,
Title: Re: Recommendations for Oscilloscope
Post by: David Sturzenbecher on June 08, 2015, 11:46:20 pm
I picked up a used Fluke 123 and absolutely love it.


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Title: Re: Recommendations for Oscilloscope
Post by: Scott Holtzman on June 09, 2015, 12:27:34 am
I picked up a used Fluke 123 and absolutely love it.


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I hate low end digital scopes, low resolution slow response time displays.

I have seen some lab grade stuff that is tolerable but insanely expensive.

For the OP's application he could get a PC scope, they work OK or something like the little Leader on my bench.  I have not dug out my big analog scope in a long time.   I have analog microphones laying around.  One of the nice things you can do if you are cheap is to get an old signal generator and use a lissajous pattern to zero beat the MIC to the Frequency reference (you have to figure out the IF to do this).  Once you know the TX is balls on you can set the receiver discriminator for 0 volts on a dead carrier.  (I love showing people cheap oscilloscope tricks, all borne out of necessity as a technician used to be expected to repair and maintain the gear not just operate it).

 
Title: Re: Recommendations for Oscilloscope
Post by: Stephen Kirby on June 09, 2015, 01:09:01 am
For audio a cheap analog 40MHz is pretty much all you need.  BK used to sell something that had a built in signal generator.  Or maybe it was Leader.  Probably the same scope.  Probably pick one up really cheap off fleabay from someone who bought one thinking they were going to do something and got tired of it taking up space.
Title: Re: Recommendations for Oscilloscope
Post by: Rob Spence on June 09, 2015, 10:33:14 am
Go to an electronics oriented flea market, ham fest or the sort.
Lots of older Tek scopes for sale. Any of the old 400 series is fine for audio.
I wish I had picked up a 466 when I could.

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Title: Re: Recommendations for Oscilloscope
Post by: TJ (Tom) Cornish on June 09, 2015, 08:04:37 pm
I am looking for a decent Oscilloscope to perform some Power Amplifier measuring on some dummy loads. I am looking on purchasing new Sub amps and I would rather look at what they are doing and listen to what they are doing to test on rated power on some of the newer light weight offerings. It's been way to long since ITT so if someone can recommend something decent not overly priced for that purpose it would be appreciated as I am seeing some PC options but have not researched enough on those.

Thanks,
Rigol DS-1054Z. http://www.rigolna.com/products/digital-oscilloscopes/ds1000Z/ds1054z/

Remember that virtually all scopes are referenced to earth ground, so you either need to measure things that can be referenced to earth, or use an active differential probe.