User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
159User Manual 1178.3370.02 ─ 09
8. Continue in this way until all carriers have been measured.
7.2.6.5 Measurement Example
In the following example, the bandwidth that occupies 99 % of the total power of a PDC
signal at 800 MHz, level 0 dBm is measured.
A programming example demonstrating an OBW measurement in a remote environ-
ment is provided in Chapter 11.6.6.2, "Programming Example: OBW Measurement",
on page 658.
1. Preset the R&S FPL1000.
2. Set the "Center Frequency" to 800
MHz.
3. Set the "Reference Level" to -10 dBm.
4. Press the [MEAS] key or select "Select Measurement" in the "Overview".
5. Select the "OBW" measurement function.
6. Select the "OBW Config" softkey.
7. Set the "% Power Bandwidth" to 99 %.
8. Set the "Channel Bandwidth" to 21 kHz as specified by the PDC standard.
9. Optimize the settings for the selected channel configuration by selecting "Adjust
Settings".
10. Adjust the reference level to the measured total power by selecting "Auto Level" in
the [Auto set] menu.
11. The PDC standard requires the peak detector for OBW measurement. In the
"Traces" configuration dialog, set the trace detector to "PositivePeak".
12. Start a sweep.
The result is displayed as OBW in the marker results.
7.2.7 Spectrum Emission Mask (SEM) Measurement
Spectrum Emission Mask (SEM) measurements monitor compliance with a spectral
mask.
● About the Measurement........................................................................................160
● Typical Applications...............................................................................................160
● SEM Results......................................................................................................... 160
● SEM Basics...........................................................................................................163
● SEM Configuration................................................................................................173
● How to Perform a Spectrum Emission Mask Measurement..................................187
● Measurement Example: Multi-SEM Measurement................................................191
● Reference: SEM File Descriptions........................................................................ 193
Measurements and Results