The uncal lights are on because you probably have the CH A, CH B and
timebase variables out of detent.

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"We ought always to know precisely why a given job
is done in a particular way, and why it is done at
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if it must be done at all."-- T.J.Watson

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"MIKE" wrote in message
om...
Hi !
I'm wondering is there any one who can and want :-), to guide me
throught calibration of HP1740a ?. Few days ago i've bought this unit.
But it's uncal all three "cal" LED's are turned on".
I was trying to found out somewhere service manual. But i've found out
one for 65 $ :-(...It's too much for me.

Please help !!

B.R.
MIKE