MEAS - Analyzer R&S ESCI
1166.6004.12 4.150 E-1
NUMBER OF
SWEEPS
The NUMBER OF SWEEPS softkey activates the entry of the number of sweeps
for maximum or average value calculation.
SINGLE SWEEP mode The R&S ESCI performs sweeps until the
selected number of sweeps is reached and
stops then.
CONTINUOUS SWEEP mode Averaging is carried out until the selected
number of sweeps is reached. After that,
averaging is performed in continuous mode.
and is then continued as running averaging.
Calculation of the maximum peak (MAX HOLD)
is performed continuously irrespective of the
selected number of sweeps.
The valid range values is 0 to 32767.
Depending on the specified number of sweeps, averaging is carried out according
to the following rules:
NUMBER OF SWEEPS = 0 Continuous averaging is carried out over 10
measured values.
NUMBER OF SWEEPS = 1 No averaging is carried out.
NUMBER OF SWEEPS > 1 Averaging is carried out over the set number of
measured values.
Note: This setting is equivalent to the setting of the sweep count in the
TRACE menu.
IEC/IEEE-bus command: SWE:COUN <value>
Example:
The mean power of a GSM burst with 0 dBm nominal power at 800 MHz is to be measured.
[PRESET] Set the R&S ESCI to the default setting.
[FREQ: CENTER: 800 MHz] Set the center frequency to 800 MHz.
[SPAN: ZERO SPAN] Select time domain display (span = 0 Hz).
[AMPT: 0 dBm] Set the reference level to 0 dBm.
[BW: RES BW MANUAL: Set the resolution bandwidth to 30 kHz in line with
30 kHz] the requirements of the GSM standard.
[SWEEP: SWEEPTIME MANUAL Set the sweep time to 600 µs.
600 µs]
[TRIG: VIDEO: 50 %] Use the video signal as trigger source.
[MEAS] Call the menu for the measurement functions.
[TIME DOM POWER] Select power measurement in the time domain. The R&S ESCI
calculates the mean power from the points of the whole trace.
The submenu for configuration of the power measurement is
opened. MEAN is already switched on.
[LIMITS ON] Activate the limitation of the time domain of the power
measurement .
[START LIMIT: 250 µs] Set the start of the power measurement at 250 µs.
[STOP LIMIT: 500 µs] Set the end of the power measurement at 500 µs.
Note: The GSM specifications require the power to be measured between 50% and 90% of the TDMA
burst. The time limits set above approximately correspond to the required time domain.
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