Stanford Research Systems SR785, Operating Manual And Programming Reference

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Waterfall Menu 4-141
SR785 Dynamic Signal Analyzer
Fast Angles
Select the Waterfall Fast Angles for the active display [On, Off].
The View Count and the Trace Height determine the available scroll Angles. When Fast
Angles is On, the available Scroll Angles are limited to those which update faster (due to
the graphics architecture).
Each display has its own Fast Angles mode. This entry field can be linked to both
displays by using the [Link] key.
Command: WFST (?) d {, i}
Threshold
Set the Waterfall Threshold for the active display [0%..99%]. The Threshold is specified
as a percentage of the Y axis (Trace Height). Only those portions of each record which
exceed the Threshold are displayed. This removes baseline noise from the waterfall
display.
Note that the marker still moves along the actual data in each record, even if it is below
the threshold. In this case, the marker will be located where there is no displayed data.
The Marker Position Bar displays the actual data value in all cases.
Each display has its own Waterfall Threshold. This entry field can be linked to both
displays by using the [Link] key.
Command: WTHR (?) d {, i}
Hidden Lines
Set the Waterfall Hidden Line Mode for the active display [Invisible, Visible]. In a
waterfall display, as the older records scroll downward, they are considered to move
towards the ‘front’ of the display. New records which appear at the top are ‘behind’ the
older records. Invisible Hidden Lines will remove the portions of the new record which
are ‘behind’ older records. This cleans up a waterfall display by removing intersecting
lines. If records at the front of the waterfall are obscuring details hidden behind them,
reverse the waterfall direction.
Each display has its own Waterfall Hidden Line Mode. This entry field can be linked to
both displays by using the [Link] key.
Command: WHID (?) d {, i}
Paused Drawing
Set the waterfall display direction for a paused measurement [Normal, Oldest at Top].
While the measurement is running, the waterfall display scrolls down and the newest
record is added to the top (back) of the waterfall.