Rohde & Schwarz R&S FSP Series, Operating Manual

Page: 159 / 796

Operating Manual 1164.4556.12 - 06 4.87
R&S FSP Instrument Functions
Analyzer Mode
As of firmware version 4.4x it is possible to customize ACP User Standards. The
user defined ACP standard can be activated via the entry
USER in the standard
selection list. The related configuration file is displayed in brackets. To select
another user defined standard, use the softkey
SELECT USER STD .
Remote command:
CALC:MARK:FUNC:POW:PRES <standard>
CALC:MARK:FUNC:POW:PRES <file name>
CP/ACP
CONFIG
See following section “Setting the Channel Configuration” on page 4.91 .
SET CP
REFERENCE
With channel power measurement activated, the SET CP REFERENCE softkey
defines the currently measured channel power as the reference value. The refer-
ence value is displayed in the
CH PWR REF field; the default value is 0 dBm.
The softkey is available only for multi carrier ACP measurements.
In adjacent-channel power measurement with one or several carrier signals, the
power is always referenced to a transmission channel, i.e. no value is displayed for
CH PWR REF .
Remote command:
SENS:POW:ACH:REF:AUTO ONCE
SWEEP TIME The SWEEP TIME softkey activates the entry of the sweep time. With the RMS
detector, a longer sweep time increases the stability of the measurement results.
The function of the softkey is identical to the softkey SWEEP TIME MANUAL in the
BW menu.
Remote command:
SWE:TIME <value>
NOISE CORR
(ON OFF)
If the NOISE CORR ON/OFF softkey is activated, the results will be corrected by the
instrument's inherent noise, which increases the dynamic range.
When the function is switched on, a reference measurement of the instrument's
inherent noise is carried out. The noise power measured is then subtracted from the
power in the channel that is being examined.
The inherent noise of the instrument depends on the selected center frequency, res-
olution bandwidth and level setting. Therefore, the correction function is disabled
whenever one of these parameters is changed. A disable message is displayed on
the screen.
To enable the correction function in conjunction with the changed setting, press the
softkey once more. A new reference measurement is carried out.
Remote command:
SENS:POW:NCOR ON
FAST ACP
(ON OFF)
The FAST ACP ON/OFF softkey switches between the IBW method ( FAST ACP
OFF ) and the time domain method ( FAST ACP ON ).
With FAST ACP ON the power measurement is performed in the different channels
in the time domain. The R&S FSP sets the center frequency consecutively to the dif-
ferent channel center frequencies and measures the power with the selected mea-
surement time (= sweep time/number of channels). The RBW filters suitable for the
selected standard and frequency offset are automatically used (e.g. root raised cos
with IS 136).
A list of available filters is included in section “Filter Types” on page 4.24 .