Tektronix SPG8000 Technical Reference page 128

SDI button menu (Option SDI only)
Zone plate dependent
parameters
116
Below the pattern control parameter in each of the parameter menus are the
dependent parameters. The dependent parameters are the same for all the zone
plate patterns. Use the up (▲) or down (▼) arrow button to scroll through the
parameter menu. If desired, use the left (◄) or right (►) arrow button to change
the parameter.
NOTE.
Press the left (◄) and right (►) arrow buttons at the same time to reset
any parameter to its default value.
If you adjust any one of the dependent parameters individually, the pattern control
parameter will become invalid, and you will see this message:
The zone plate dependent parameters are discussed here, in the order in which
they appear below the pattern control parameter, when using the down (▼) arrow
button to scroll through the parameter menu. The Custom-1 and Custom-2 signal
selections do not have pattern control parameters, and start with the Zone Plate
Amplitude Parameter.
Zone plate amplitude parameter.
Display name: ZP Amplitude
Units: mV
Use this parameter to adjust the zone plate signal amplitude from 0.0 mV to
798.0 mV, in 0.5 mV increments. The default value is 700 mV.
SPG8000 Technical Reference