R&S 1129.7246.03, Руководство по эксплуатации

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Operating Manual 1302.6163.12 - 03 4.205
R&S ESU Instrument Functions
Analyzer Mode
MEAN PWR
POSITION
Defines the relative X position of the mean power value for the CCDF measurement.
The default position is 0% (left corner of the grid). This softkey is available if the
CCDF measurement is switched on.
Remote command:
CALC:STAT:SCAL:X:MPOS <numeric_value>
ADJUST
SETTINGS
see “ADJUST SETTINGS” on page 4.204
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:
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 dis-
carded.
Remote 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 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 ] 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 band-
width).
[ 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 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.