[Test-Equipment] Scope questions: OT for Tek?

[J. Forster]

Email Dave at ArtekMedia.com

He is THE guru on manuals.

Best,

-John

==================



>
> Hi. I collect scopes (don't ask me why, some kind of sickness) ha ha
>
> I have a nice assortment, which includes a big 'ole LeCroy (350 MHz) to a
> small Leader (15 MHz). I have done a refurb on them all and I am quite
> happy with them all. This does not include 3 Tek 7623s which are driving
> me nuts, but that's for another time.
>
> Here is my current 'problem'.....
>
> I have both a Leader LBO-526 and a Kenwood CS-2150 with different
> problems.
>
> I have NO doubt that both of these scopes are the same internally and
> externally, except for the logos. Unfortunately, I have not been able to
> find any type of manual for either.
>
> I'll start with the 'simple' problem.... The Leader.
>
> It works beautifully with a crisp display, but when I feed a signal to
> Channel one, the display is non-functional at .2 mv/div and higher, In
> other words, using the calibrator (or an external signal generator), I
> have a nice display until I start LOWERING the voltage/div. This is kinda
> opposite what seems likely. .1 V/div (and lower) looks OK and .2 V/div
> looks like ground. Channel Two is fine.
>
> Next the .......... Kenwood
>
> Using the calibrator signal as above, and the exact same settings, the
> scope looks like it is TRYING to work. I can see 'flashes' of light on the
> screen, but no traces. Pushing the "trace locator' produces a compressed,
> visible trace in the center of the screen, for each channel. I can use the
> 'position' knob to move these traces up and down. However, when I release
> this 'finder' button, the traces disappear and all I see are these low
> level flashes of light and I cannot locate the beams. It appears (!!) they
> are off screen.
>
>
> Any Ideas?? The Leader problem is one that I can live with, since Channel
> 2 functions as expected at voltages of .2 V/div and up.
>
> Thank you in advance!
> If you wish, you can contact me off list:
>
> n4ue at arrl.net
>
> ron
> N4UE
>
>
>
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