2208 Channel THD Difference

Post any questions you may have about our current range of oscilloscopes
Post Reply
Yostin
User
User
Posts: 2
Joined: Sat Jul 21, 2018 6:43 am

2208 Channel THD Difference

Post by Yostin » Thu Aug 16, 2018 8:36 am

Hello,

I have setup a test signal from my 2208 GEN output of 1khz/2V and measured directly on channels A & B.

What I am measuring gives me the impression my scope is faulty.

Channel A https://ibb.co/fwSOt9
Channel B https://ibb.co/j2Drfp

Am I doing something wrong?

Gerry
PICO STAFF
PICO STAFF
Posts: 462
Joined: Mon Aug 11, 2014 11:14 am

Re: 2208 Channel THD Difference

Post by Gerry » Thu Aug 16, 2018 3:51 pm

Hi Yostin,

I don't think that you have a faulty Scope. It looks like you have different input ranges or probe settings/switches set for the 2 channels, and you're using a square-wave with odd harmonics, which would make the screen shots perfectly normal.

But we need to confirm exactly what you are doing. Could you post a psdata file for the Scope Mode plots and one for the Spectrum mode plots, and a photo of how everything is connected up.

Regards,

Gerry
Gerry
Technical Specialist

Yostin
User
User
Posts: 2
Joined: Sat Jul 21, 2018 6:43 am

Re: 2208 Channel THD Difference

Post by Yostin » Sun Aug 26, 2018 11:20 am

Hi Gerry,

Thanks for the reply.
You are correct, I have setup the test again and all looks well now.

Post Reply