RIGOL DSA875 - Manual (Page 46)

RIGOL Chapter 1 Quick Start
User’s Guide for DSA800 Series 1-26
switch between upper and lower cases. At this point, the corresponding
label is displayed at the lower right corner of the filename input interface.
2) Press the key of the desired letter. At this point, the letters available are
displayed in the letter selecting area. Press this key repeatedly or
retate the knob until the desired letter is selected (the background color
of the letter becomes brown). Then press Enter to input the desired
letter.
3) Use the above method to input the other letters.
Tip:
If you need to use numbers as the filename (or part of the filename), press
to switch to number input mode and use the numeric keys to input the desired
number.