MEAS - Analyzer R&S ESCI
1166.6004.12 4.146 E-1
Power Measurement in Time Domain
With the aid of the power measurement function, the R&S ESCI determines the power of the signal in
the time domain (SPAN = 0 Hz) by summing up the power at the individual pixels and dividing the result
by the number of pixels. In this way it is possible to measure for example the power of TDMA signals
during transmission or during the muting phase. Both the mean power and the rms power can be
measured by means of the individual power values.
The result is displayed in the marker info field.
The measured values are updated after each sweep or averaged over a user-defined number of
sweeps (AVERAGE ON/OFF and NUMBER OF SWEEPS) in order to determine e.g. the mean power
over several bursts. For determination of the peak value (MAX HOLD ON) the maximum value from
several sweeps is displayed.
Example:
Marker info field for: MEAN selected, AVERAGE ON and MAX HOLD ON:
MEAN HOLD -2.33 dBm
MEAN AV -2.39 dBm
If both the on and off phase of a burst signal are displayed, the measurement range can be limited to
the transmission or to the muting phase with the aid of vertical lines. The ratio between signal and noise
power of a TDMA signal for instance can be measured by using a measurement as a reference value
and after that varying the measurement range.
Upon switching on power measurement the sample detector is activated (TRACE-DETECTOR-
SAMPLE).
Submenu MEAS - TIME DOM POWER:
TIME DOM
POWER
RMS
AVERAGE
ON OFF
NUMBER OF
SWEEPS
MEAN
OFF
MAX HOLD
ON OFF
START
LIMIT
STOP
LIMIT
POWER
ON OFF
O
LIMITS
ON OFF
SET
REFERENCE
POWER
ABS REL
PEAK
STANDARD
DEVIATION
The TIME DOM POWER softkey activates the
power measurement in the time domain and
opens a submenu for configuration of the
power measurement.
The submenu allows selection of the type of
power measurement (rms or mean power), the
settings for max hold and averaging as well as
the definition of limits.
The power evaluation range can be limited by
input of limit values.
Note: This softkey is only available in time
domain (SPAN = 0).
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