HEIDENHAIN PWM 20 - Manual (Page 185)

188 HEIDENHAIN ATS Software User's Manual
8 Press the Z1 button to start the inspection of the Z1 track (= CD track or
commutation track).
Analog display of the Z1 (CD) commutation track
As the Z1 track only has one grating period, the scanning frequency is very low when you turn
the encoder by hand. The shaft speed and the number of samples are decisive for the display
accuracy of the bar graphs and of the signal in the oscilloscope display (full circle; no segments!)
Example:
Increase the number of samples to display a complete signal with "manual operation".
Note
The bar graphs are only updated when the scanning frequency is sufficiently high.
An exception is amplitude measurement (Sig A/Sig B) which also works in standstill.