Rohde & Schwarz FPC Series, User Manual

Page: 172 / 419

Digital Demodulation
R&S
®
FPC
169 User Manual 1178.4130.02 ─ 07
Single Measurement
See "Selecting the measurement mode" on page 168.
Remote command:
Measurement type:
INITiate:CONTinuous
on page 262
New measurement sequence:
INITiate[:IMMediate]
on page 263
17.6 Trigger Configuration
Access : "Sweep" > "Trigger"
Remote commands to trigger measurements:
●
Chapter 19.15.6, "Trigger" , on page 322
Trigger settings in the digital demodulation described elsewhere:
●
"Free Run": Chapter 14.7, "Trigger Configuration" , on page 112
●
"External Rise": Chapter 14.7, "Trigger Configuration" , on page 112
●
"External Fall": Chapter 14.7, "Trigger Configuration" , on page 112
In addition to the trigger settings available in the spectrum application, the digital
demodulation application provides an I/Q power trigger source.
Using the I/Q power trigger
The I/Q power trigger initiates a measurement when the magnitude of the sampled I/Q
data exceeds a certain level.
1. Press the "Sweep" key to open the sweep menu.
2. Select the "Trigger" menu item to open the trigger menu.
3. Select the "IQ Power <x>" menu item.
The R&S FPC opens an input field to define the trigger level.
4. Define an appropriate trigger level.
To make sure that the trigger initiates a measurement, we recommend a trigger
level that is about 6
dB lower than the actual expected signal level.
Note that a burst is only recognized if it is not too short and if the gap between two
bursts is not too short.
Trigger Configuration