Stanford Research Systems SR785, Руководство по эксплуатации и программированию

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Normal Marker Menu 4-55
SR785 Dynamic Signal Analyzer
Command: MWID (?) d {, i}
Rel
Select the Normal Marker Rel Mode of the active display [Off, Relative, Reference
Display, Other Display].
The Marker Position display above the graph shows the X position (frequency or time)
and the Y value (amplitude) of the Marker. A relative reading is preceded by a
∆
(delta)
symbol.
The X position may be shown absolute or relative in all cases as selected by <X-Rel>.
When Rel is Off the absolute marker position is displayed.
Relative calculates the marker position relative to the Marker Offset (X-Rel, Y-Rel). The
Marker Offset location (if it is within the display) is marked by a small flag shaped
symbol.
Reference Display calculates the marker position relative to the Reference Display. The
X position is absolute and the Y position is offset by the Reference Display value at the
X position. Ref. Disp. is only available if the Reference Display is On.
Other Display calculates the marker position relative to the other display’s marker
position. The marker offset is just the marker position of the other display. This is
generally valid only if the two displays have a similar measurement.
Pressing [Marker Ref] changes from Off to Rel. and sets the Marker Offset to the current
Marker Position. [Marker Ref] again changes from Rel. back to Off. [Marker Ref] does
not change the other modes.
Each display has its own Normal Marker Rel Mode. This entry field can be linked to
both displays using the [Link] key.
Command: MREL (?) d {, i}
X-Rel
Set the X Offset for the Normal Marker of the active display.
When the Marker Rel Mode is Relative, the marker position is calculated relative to the
Marker Offset (X-Rel, Y-Rel). The Marker Offset location (if it is within the display) is
marked by a small flag shaped symbol.
The Marker Offset has no associated units. The relative calculation simply subtracts the
Marker Offset (in the display units) from the absolute marker position. Changing the
display units invalidates the Marker Offset. Re-enter the Marker Offset or use [Marker
Ref] to reset the Marker Offset in the new units.