R&S ESCI Analyzer - MEAS
1166.6004.12 4.175 E-1
CONT
MEAS
The CONT MEAS softkey starts collecting a new sequence of sample data
and calculating the APD or CCDF curve depending on the selected
measurement. The next measurement is started automatically as soon as the
indicated number of samples has been reached ("CONTinuous
MEASurement").
IEC/IEEE-bus command: INIT:CONT ON;
INIT:IMM
SINGLE
MEAS
The SINGLE MEAS softkey starts collecting a new sequence of sample data
and calculating the APD or CCDF curve depending on the selected
measurement. At the beginning of the measurement previously obtained
measurement results are discarded.
IEC/IEEE-bus command:
INIT:CONT OFF;
INIT:IMM
Hint for usage of the marker functions with measurement of signal statistics:
With the signal statistic measurement level always is displayed on x-axis. Y-axis always is a normalized
value between 0 and 1. In contrary to use of marker in frequency or time domain marker is input in level
values and the output is in percentage values.
Example:
Measurement of CCDF of a IS95 BTS signal, level 0 dBm, frequency 800 MHz
[
PRESET] Switch on preset settings.
[
FREQ: CENTER: 800 MHz] Set center frequency to 800 MHz.
[
AMPT: 10 dBm] Set reference level to 10 dBm.
[
BW: 3 MHz] Set resolution bandwidth to 3 MHz (resolution bandwidth shall be wider
then signal bandwidth (1.25 MHz) in order to have the complete signal
within the resolution bandwidth).
[
MEAS] Call the menu for measurement functions.
[
SIGNAL STATISTIC] Call the menu for signal statistics measurement.
[
CCDF ON /OFF] Switch on measurement of the complementary cumulative distribution
function. The R&S ESCI switches to zero span mode. The power of the
signal and the CCDF is calculated for the number of samples selected.
With the CCDF function sample detector and video bandwidth are set
automatically.
[NO OF SAMPLES: 10000] Set the number of measurement samples to 10000.
[SINGLE MEAS] Start the measurement sequence. At the end the resulting trace will
display the CCDF for the measured 10000 samples.
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