User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
148User Manual 1178.3370.02 ─ 09
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Increase the RBW to minimize the measurement time; however, consider the
requirements of the standard if you need to measure according to standard! The
automatic settings are always according to standard.
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Take advantage of the speed optimization mode in the "Sweep" settings if you do
not require the larger dynamic range (see "Optimization" on page 327).
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Reduce the "Sweep Time" and thus the amount of data to be captured and calcu-
lated; however, consider the requirements regarding the standard deviation.
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To improve the stability of the measured results, increase the "Sweep Time",
which also leads to more averaging steps.
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Instead of trace averaging, use an RMS detector with a higher "Sweep Time" to
obtain better average power results in less time.
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To determine a channel power level quickly, use the Time Domain Power Mea-
surement (TDP) rather than a Channel Power measurement. The TDP measure-
ment is a zero span measurement where the sweep time determines the measure-
ment time. Due to the FFT measurement, duplicate averaging is performed, provid-
ing very stable results very quickly.
Note, however, that for TDP measurements, channel filters are not available and a
fixed RBW is used. Thus, the measurement may not be according to standard for
some test cases.
7.2.4.8 Reference: Predefined CP/ACLR Standards
When using predefined standards for ACLR measurement, the test parameters for the
channel and adjacent-channel measurements are configured automatically.
You can select a predefined standard via the "CP / ACLR Standard" softkey in the "Ch
Power" menu or the selection list in the "General Settings" tab of the "ACLR Setup"
dialog box (see "Standard" on page 135).
Table 7-10: Predefined CP / ACLR standards with remote command parameters
Standard Remote parameter
None NONE
EUTRA/LTE Square EUTRa
EUTRA/LTE Square/RRC REUTra
W-CDMA 3GPP FWD FW3Gppcdma
W-CDMA 3GPP REV RW3Gppcdma
WLAN 802.11A AWLAN
WLAN 802.11B BWLAN
RFID 14443 RFID14443
TETRA TETRa
Measurements and Results