Joined: 23 Feb 2019
Location: In a Server
|Posted: Sat Feb 23, 2019 5:33 pm Post subject: Oscilloscope UNAOHM G4020 = BECKMAN 9020 = Voltcraft_2040
A friend offered
Oscilloscope UNAOHM G4020 = BECKMAN 9020 = Voltcraft_2040
In first hours worked ok ... I saw the 0,2 V 1000Hz
and other signal in the cinescop.
But now I only see 1 or 2 dots (channel 1 or both or ch 2)
I can move the dots UP and DOWN, LEFT and RIGHT
so the screen - cinesc. is working.
I test the trigger, connect CAL 0,2 to ch 1 or 2
and the dot is in 1 , 2 or more lines up depend on VOLT/DIV
INV - and the dot go down invert.
A sinos. wave, I can rotate TRIG LEVEL and the dot follow
But I can't see the wave in display
Some examples of scope:
Manual and schemat. I have the French and Germany version.
Can you please provide help?