[Elecraft] Oscilloscope

k4zm k4zm at comcast.net
Thu Jul 21 15:45:34 EDT 2005


Ci:

I have done both in my life time and I'll take the O'scope problem any 
day...LOL  You need to set the scope in the auto trigger mode and adjust the 
sweep speed to a speed that will show you pretty much a solid wide band 
across the screen when connected to the  test point.  You need to adjust the 
input attenuator to the expected voltage range and then measure the nimber 
of divisions the wide bad covers on the screen.  It is easy to do if you set 
the bottom of the band to a large line and then read how many large boxes it 
covers and what part of another.  Then take that number and multiply it 
times the volt/div setting on the input attenuator scale.  You can reduce 
the attenuator to produce the largest display without filling the screen 
completely...The result will be the Peak to Peak voltage of the signal at 
that point.  It really helps if you have another unit that is working that 
you can compare signals with.  One other note some probes are attenuated by 
10 times if this is the case you need to multiply the first product by 10... 
At least while using the ocsope the windshield is not covered with St. 
Elmo's Fire....LOL

73

Jim  K4ZM 




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