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WME_bill · 1st Mar 2021, 10:27 pm

D75 scope.
There are so many options with these modern scopes. so while you are discovering how to use it, I suggest you should keep it as simple as possible.
Agriff is quite right and has noticed already that some of the control settings seem peculiar.
Try to get a single trace so set the Y Plug in to ch2,display ch2, trigger ch2. Input to ch2 only.
Then set the A Timebase to Sweep Repetitive, Auto trigger. A display only, polarity +,Source Int, Sweep speed by the A red knob. Check the large TB sweep knob is not at the ExtnX position. You will have to play with the Trigger Level and the A timebase speed. You may have to switch from Auto Trigger Mode to AC.
And as Agriff say, get the manual as that has very helpful instructions on setting it up and how it works. I think the manual is available readily on the web. Either the D75 or the D83 is virtually the same, just a bigger screen.

Your picture shows input to ch2 only, yet you talk about an input to ch1 as well as ch2. This confuses us somewhat.
They are nice scopes, and well worth getting going.
wme_bill.

1st Mar 2021, 10:27 pm	#3
WME_bill Octode Join Date: Oct 2007 Location: Exeter, Devon, UK. Posts: 1,554	Re: Telequipment D75 Scope D75 scope. There are so many options with these modern scopes. so while you are discovering how to use it, I suggest you should keep it as simple as possible. Agriff is quite right and has noticed already that some of the control settings seem peculiar. Try to get a single trace so set the Y Plug in to ch2,display ch2, trigger ch2. Input to ch2 only. Then set the A Timebase to Sweep Repetitive, Auto trigger. A display only, polarity +,Source Int, Sweep speed by the A red knob. Check the large TB sweep knob is not at the ExtnX position. You will have to play with the Trigger Level and the A timebase speed. You may have to switch from Auto Trigger Mode to AC. And as Agriff say, get the manual as that has very helpful instructions on setting it up and how it works. I think the manual is available readily on the web. Either the D75 or the D83 is virtually the same, just a bigger screen. Your picture shows input to ch2 only, yet you talk about an input to ch1 as well as ch2. This confuses us somewhat. They are nice scopes, and well worth getting going. wme_bill.