The test square wave works perfectly and I am trying to look at a 1k Hz sine wave from this site.
http://www.mediacollege.com/audio/tone/download/
And using this procedure
https://www.circuitspecialists.com/blog ... illoscope/
And nothing shows on the screen. But a straight line though the line does look like it has been modulated a bit.
So how to fix this ?
Thanks
Trying to display a sine wave
Re: Trying to display a sine wave
I see there have been a few members viewing my thread.
Would you be so kind as to download the 1k Hz tone and see if your DSO 138, scopes it accurately ?
Thanks
Would you be so kind as to download the 1k Hz tone and see if your DSO 138, scopes it accurately ?
Thanks
Re: Trying to display a sine wave
Have you tried changing the input selectors switches for different sensitivities?
Can I assume that you can hear this tone easily on a pair of headphones? If so, have you a good connection from your sound source to the 'scope?
Can I assume that you can hear this tone easily on a pair of headphones? If so, have you a good connection from your sound source to the 'scope?
Re: Trying to display a sine wave
Thank you Dave, and yes to all 3 of your points.davef wrote:Have you tried changing the input selectors switches for different sensitivities?
Can I assume that you can hear this tone easily on a pair of headphones? If so, have you a good connection from your sound source to the 'scope?
Have you been successful in scoping a 1k Hz sine wave ? If yes, what were your scope settings ?
I think that I am going to re-re-recheck the solder connections.
Re: Trying to display a sine wave
It's working now. I resoldered a few joints and adjusted the sensor so as to handle a smaller voltage.
The sensor was set at 1v whereas the signal was about 1.5mv.
All is well.
The sensor was set at 1v whereas the signal was about 1.5mv.
All is well.