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<p>I'm not familiar with that model. I've 1000s of hours using
scopes mainly (99.99%) Tek scopes.</p>
<p>What I will say about buying an used scope is unless it comes
with a current (less than a year old) calibration certificate add
the bucks it costs to get calibrated it professionally if you want
accurate measurements. That might get rid of the offset. No you
shouldn't need a short probe to test the offset, no probe should
work.</p>
<p>Personally I thing getting one of the cheap digital scopes now
days is a better option. You have digital measurements and bus
decoding which make life a lot easier than having to count ticks
and do math for measurements and manually decode buses.</p>
<p>Jay S.<br>
</p>
<div class="moz-cite-prefix">On 4/5/2021 8:10 AM, Jean-Pierre
Desrochers wrote:<br>
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<p class="MsoPlainText"><span lang="EN-CA">I'm looking for a <u>used
4 channels scopes</u> on eBay.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA">I have preferences
for HP and Tektronix.<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-CA">Anybody owns (or
owned) this type of scope ?<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:black" lang="EN-CA"><a
href="https://www.ebay.ca/itm/124166473008?&ul_noapp=true&autorefresh=true"
moz-do-not-send="true">https://www.ebay.ca/itm/124166473008?&ul_noapp=true&autorefresh=true</a><o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:black" lang="EN-CA"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="color:black" lang="EN-CA">Looking
at the 10th picture showed: <br>
All the 4 channels are on the screen but it looks to me that
<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:black" lang="EN-CA">some
of them shows DC offsets (no probes connected..)<br>
I can see the channel#1 ref dot line completely alone <o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:black" lang="EN-CA">but
many signal lines are over it.. <o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:black" lang="EN-CA">Channel#1
at 2.00mv/div<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:black" lang="EN-CA">Channel#2
at 5.00mv/div<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:black" lang="EN-CA">Hmmm...<o:p></o:p></span></p>
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