Stanford Research Systems SR785, Руководство по эксплуатации и программированию

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4-48 Display Options Menu
SR785 Dynamic Signal Analyzer
The two displays have their own Grid. This entry field can be linked to both displays
using the [Link] key.
Command: GRID (?) d {, i}
Grid Div
Select the number of Grid Divisions for the active display [8, 10, 12, 15].
Changing the number of Grid Divisions changes the vertical scaling (Y/div) and leaves
the display references unchanged. If the view is polar, the horizontal scaling (X/div) is
also changed. Change the scaling in the [Display Setup] menu.
The two displays have their own number of Grid Divisions. This entry field can be
linked to both displays using the [Link] key.
Command: GDIV (?) d {, i}
Nyquist Grid
Select the type of grid for 2-dimensional (Nyquist View) graphs.
If this softkey is set to rectangular, the Nyquist View is displayed with a rectangular grid.
In this case, X-Center, Y-Center, Y/div, and X/div are all individually adjustable.
If the grid is set to polar, a polar grid is displayed. In this case, X center and Y center are
fixed at 0. Y/div is adjustable and gives the number of Y units in each radial spoke of the
grid.
Command: GDIV (?) d {, i}
Phase Suppress
Set the Phase Suppress Threshold for the active display [0.. ]. When the display View is
Phase or Unwrapped Phase, the phase of data points with a squared magnitude less than
the threshold are displayed as zero. This avoids the messy phase display associated with
the noise floor. (Remember, even a small signal has phase.)
To display the phase of all points, set the threshold to 0.0.
To suppress the phase of signals below -60 dBV (1.0E-3 V), set the threshold to 1.0E-
6 V
2
(magnitude squared).
The two displays have their own Phase Suppress Threshold. This entry field can be
linked to both displays using the [Link] key.
Command: PHSL (?) d {, x}