Agilent Technologies Signal Analyzer N9030a User Manual
Page 791
6 RLC Swept SA Measurement Front-Panel & SCPI Reference
Meas Setup
1. Trace averaging (see “
”) averages signal amplitudes on a trace-to-
trace basis. The average type applies to all traces in Trace Average (it is not set on a trace-by-
trace basis).
2. Average detector (see “
”) averages signal amplitudes during the
time or frequency interval represented by a particular measurement point.
3. Noise Marker (see “
”) averages signal amplitudes across
measurement points to reduce variations for noisy signals.
4. VBW filtering (see “
”) adds video filtering which is a form of averaging of the
video signal.
When Auto is selected, the analyzer chooses the type of averaging (see below). When one of the
average types is selected manually, the analyzer uses that type regardless of other analyzer
settings, and shows Man on the Average Type softkey.
Auto
Chooses the optimum type of averaging for the current instrument measurement settings.
Key Path
Meas setup, Average Type
Example
AVER:TYPE:AUTO ON
Notes
See Average Type, above
Couplings
Here are the auto-select rules for Average Type:
Auto selects VoltageAveraging if the Detector for any active trace is EMI Average or QPD or
RMS Average; otherwise it selects Power (RMS) Averaging if a Marker Function (Marker
Noise, Band/Intvl Power) is on, or Detector is set to Man and Average; otherwise if Amplitude,
Scale Type is set to Lin it selects Voltage Averaging; otherwise, if the EMC Standard is set to
CISPR, it selects Voltage; otherwise Auto selects Log-Power Average.
Note that these rules are only applied to active traces. Traces which are not updating do not
impact the auto-selection of Average Type.
State Saved
Saved in instrument state
Readback
The type auto-selected is displayed in the readback line on the Average Type key
Initial S/W Revision
Prior to A.02.00
Log-Pwr Avg (Video)
Selects the logarithmic (decibel) scale for all filtering and averaging processes. This scale is
sometimes called “Video” because it is the most common display and analysis scale for the video
signal within a spectrum analyzer. This scale is excellent for finding CW signals near noise, but
its response to noise-like signals is 2.506 dB lower than the average power of those noise signals.
This is compensated for in the Marker Noise function.
Remote Language Compatibility Measurement Application Reference
791