TDS3064B "ripple" on calibrator signal


benj3867
 

Let me add that the max value changes for me between 5.36 and 5.44, which is more than it changes for you. However, this is due to the noise.


benj3867
 

Just checked a TDS3014B. The trace of the calibrator signal shows no such ripple whatsoever.
There is the usual noise making the trace a bit thick, (this obviously disappears when one turns on averaging), but it is flat as a ruler.


 

Unfortunately that isn't the problem ☹ Also tried other probes.

D.

-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Dave Peterson via groups.io
Sent: 03 March 2021 16:08
To: TekScopes@groups.io
Subject: Re: [TekScopes] TDS3064B "ripple" on calibrator signal

David,

In my limited experience, I have seen this behavior before, but it's always been due to probe issues.


Dave Peterson
 

David,

In my limited experience, I have seen this behavior before, but it's always been due to probe issues. Usually with a long ground lead. Readjusting the probe and ground for better connections at both ends has solved it for me. Hopefully that's all it is in your case. And sorry I don't have a better answer.

Dave

On Wednesday, March 3, 2021, 05:57:33 AM PST, David C. Partridge <david.partridge@perdrix.co.uk> wrote:

Running an up-hacked TDS3014B, and am seeing small amount of what I'll call
"ripple" on the top of the calibrator signal (i.e. the 5V part of the signal
- the 0V end is relatively stable by comparison).  By "ripple" I mean it's
dancing up and down quite slowly (2Hz?) by about 1/2 a trace width, and the
Ch1 Max value switches between 5.16V and 5.20V.

Has anyone here seen this sort of behaviour before?

Thanks
David


 

Running an up-hacked TDS3014B, and am seeing small amount of what I'll call
"ripple" on the top of the calibrator signal (i.e. the 5V part of the signal
- the 0V end is relatively stable by comparison). By "ripple" I mean it's
dancing up and down quite slowly (2Hz?) by about 1/2 a trace width, and the
Ch1 Max value switches between 5.16V and 5.20V.

Has anyone here seen this sort of behaviour before?

Thanks
David