By following the guide lines, I have tested my ds1054z scope and the results are as below:
My Scope sys info:
Software version 00.04.03.00.01
Board version: 0.1.1
Boot version 0.0.1.3
Firmware version: 0.2.3.11
CPLD version 1.1
(A) Freezing test:
Unable to repeat with many tries and never occur luckily
.
(B) Math error: yes and it does occur with the below conditions:
1) Scope Must be set to 500ns/div (otherwise, No error)
2) Acquire-->mode must be set to “Averages” (otherwise, No error)
3) It must have at least three channels or more to be turning on. (I used A and B for the math (A+B) and C/D just connected to nothing.). If only turning on A and B, the error won’t occur.
(NOTE: the above three conditions MUST be met at the same time in order to have the math error occurred)
BTW, input frequency, voltage and waveform do NOT contribute to the error.