Keysight DSO1014A - a new bug?

[nfmax]

I have just found a bug with my Keysight DSO1014A, firmware version 011.04.00.04.06 SP05. Under specific circumstances, the tracking cursors stop tracking the selected waveform, where this is MATH/FFT.

To reproduce:
Select Default Setup
Apply a 1Vpp 1kHz sine wave to CH1
Set CH1 to probe X1, 200mV/div
Set timebase to 20ms/div
Turn on FFT, Blackman window, dBV display, 10dB/div
Turn on cursors in tracking mode, set both A & B to FFT
Adjust A to 1.000kHz, B to 2.000kHz
Now use the horizontal controls to set the FFT display to 62.50Hz/div, centre frequency 1.000kHz

The cursor no longer tracks the waveform!

There seem to be other manifestations of this bug. I have seen a cursor apparently tracking the FFT trace's old position after a zoom/pan operation, and I have seen a cursor track only across part of the displayed trace. Sometimes the cursors seem to be unaffected by zoom/pan, but the recipe above seems to provoke it every time.

Anyone else seen this? Are you there, Daniel?

Max

Edit to add: If you look closely, cursor B is just to the left of the right hand edge of the scree, yet its frequency is still shown as 2.000kHz. This is also wrong!

[Keysight DanielBogdanoff]

Anyone else seen this? Are you there, Daniel?

Hi! I'll take a look at it.

[nfmax]

Anyone else seen this? Are you there, Daniel?

Hi! I'll take a look at it.

Any news?

[Keysight DanielBogdanoff]

Yes, thanks for the thread bump and sorry for not responding sooner!

It does look like a bug, but it only seems to happen at the very most extreme setting of the FFT. Can you verify?