R&S ESU Series Operating Manual page 236

R&S ESU
MEAN PWR Defines the relative X position of the mean power value for the CCDF measurement.
POSITION The default position is 0% (left corner of the grid). This softkey is available if the
CCDF measurement is switched on.
Remote command:
ADJUST see "ADJUST SETTINGS" on page 4.204
SETTINGS
CONT MEAS The CONT MEAS softkey starts collecting a new sequence of sample data and cal-
culating 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.
Remote command:
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 dis-
carded.
Remote command:
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 fre-
quency or time domain marker is input in level values and the output is in percent-
age values.
Example
Measurement of CCDF of a IS95 BTS signal, level 0 dBm, frequency 800 MHz
[PRESET]
[FREQ: CENTER: 800
MHz]
[AMPT: 10 dBm]
[BW: 3 MHz]
[MEAS]
[SIGNAL STATISTIC]
[CCDF ON /OFF]
Operating Manual 1302.6163.12 - 03
CALC:STAT:SCAL:X:MPOS <numeric_value>
INIT:CONT ON;
INIT:IMM
INIT:CONT OFF;
INIT:IMM
Switch on preset settings.
Set center frequency to 800 MHz.
Set reference level to 10 dBm.
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 band-
width).
Call the menu for measurement functions.
Call the menu for signal statistics measurement.
Switch on measurement of the complementary cumulative
distribution function. The R&S ESU switches to zero span
mode. The power of the signal and the CCDF is calculated
for the number of samples selected. With the CCDF func-
tion sample detector and video bandwidth are set auto-
matically.
Instrument Functions
Analyzer Mode
4.205