R&S FSW Series, Руководство пользователя

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Common Analysis and Display Functions
R&S
®
FSW
541 User Manual 1173.9411.02 ─ 43
CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:RESult?
on page 1194
n dB down Marker State ..............................................................................................541
n dB down Value ......................................................................................................... 541
n dB down Marker State
Activates or deactivates the special n dB down marker function.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:STATe
on page 1194
CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:RESult?
on page 1194
n dB down Value
Defines the delta level from the reference marker 1 used to determine the bandwidth or
time span.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:FREQuency?
on page 1193
CALCulate<n>:MARKer<m>:FUNCtion:NDBDown:TIME?
on page 1195
9.3.4.5 Fixed Reference Marker
Access : "Overview" > "Analysis" > "Marker Functions" > "Reference Fixed"
Or : [MKR FUNC] > "Select Marker Function" > "Reference Fixed"
Instead of using a reference marker that may vary its position depending on the mea-
surement results, a fixed reference marker can be defined for trace analysis. Once
positioned, the reference marker does not move during subsequent sweeps unless you
explicitely move it manually.
When you select this marker function, a vertical and a horizontal red display line are
displayed, marked as "FXD". A normal marker is activated and set to the peak value
and a delta marker to the next peak. The fixed reference marker is set to the position of
the normal marker at the peak value. The delta marker refers to the fixed reference
marker.
Marker Usage