Sorry for the late response.
Ozan is correct.
The bottom two traces are overlayed within 0.2 divisions to 1.2 divisions per the instructions. They typically are centered on the display.
That's how I do them.
Ross
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-----Original Message-----
From:
[email protected] <
[email protected]> On Behalf Of Ozan
Sent: Tuesday, May 10, 2022 12:42 PM
To:
[email protected]Subject: Re: [TekScopes] 2465 Horizontal Calibration
On Tue, May 10, 2022 at 06:25 AM, <jimbert4@...> wrote:
Thanks, Jean-Paul. I found the following link in one of the EEVBLOG posts.
Is it the one you were thinking of?
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html
It has pictures but it looks to me like he was overlapping the two B
Sweep markers. If so, I don't think that is the way it should be
done, but I'm not sure. Seems like a simple question to answer, if anyone here actually knows.
I believe the intention of the calibration step is to match two zoomed B-sweep waveforms on top of each other for the best calibration accuracy. That is how I calibrated my 2467B few years back and didn't have an issue. When you highlight the A-sweep markers as outlined in the service manual two B-sweep markers should already be very close to each other and need a slight correction in B-sweep positions.
You may already know this but calibration setup is same setup as how you can measure period (or frequency) of a waveform accurately. You can get into the same mode by displaying your calibration signal, pull B-sweep knob and rotate right. When you press deltaT (or 1/deltaT for frequency) you should see a second intensified region that can be controlled with delta knob and another B-sweep. When you line up two B sweeps period (or frequency) displayed is measured more accurately than just placing cursors on A waveform.
Ozan
