Chapter 3 181
Instrument Functions: M - O
Marker Fctn
Instrument Functions: M - O
3.2.3 Band/Intvl Power
Measures the power in a bandwidth (non-zero span) or time interval (zero span) specified
by the user. If no marker is on, this key activates the delta pair marker mode. If the
detector mode is set to
Auto, the average detector is selected. If the Avg/VBW type is set to
Auto, Power Averaging is selected, other choices of detector and Avg/VBW type will usually
cause measurement inaccuracy. The active marker pair indicate the edges of the band.
Only
Delta Pair and Span Pair marker control modes can be used while in this function,
selecting any other mode (for example,
Normal or Delta) turns off this function.
The repeatability of your band power marker measurement can be impacted by the current
number of sweep points being used. If you only have a few sweep points in the
measurement band of interest, then small changes will have a direct impact on the
measurement result. Increasing your number of sweep points will decrease that affect and
improve the repeatability.
Key Path:
Marker Fctn
Dependencies/
Couplings:
Video triggering is not available when the detector is Average, therefore,
marker functions that would set the detector to
Average, and thus conflict
with video triggering, are not available when the
Video trigger is On.
Selecting
Band/Intvl Power when the marker control function is off, normal,
or delta will set the marker control function to delta pair.
Remote Command:
See “Marker Fctn” on page 179 for the command to select the function.
Example: CALC:MARK:FUNC BPOW turns on marker one as a band power marker.
CALC:MARK:Y? returns the value of the
Band/Intvl Power function for
marker 1 (if
Band/Intvl Power is ON for marker 1).
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