R&S FSPN, User Manual

Page: 134 / 555

Common Measurement Settings
R&S
®
FSPN
134 User Manual 1179.4363.02 ─ 01
The remote commands required to configure trigger are described in Chapter 11.6.9.4,
"Trigger Configuration" , on page 391.
Selecting the trigger source ........................................................................................ 134
Defining the trigger level and frequency ......................................................................134
Trigger Offset ............................................................................................................. 135
Defining a trigger hysteresis ........................................................................................135
Trigger Holdoff ............................................................................................................135
Defining a trigger slope ............................................................................................... 135
Defining a trigger drop-out time ...................................................................................135
Selecting the trigger source
The "Trigger Source" selects the type of event whose condition must be met to start
data acquisition.
The R&S FSPN supports the following trigger sources.
●
"Free Run"
No trigger source is considered. You can start the measurement manually any time
and stop it as required.
●
"Ext <x>"
A measurement starts when the TTL signal fed into the specified input connector
meets or exceeds the specified trigger level.
"Ext Trigger 1" and "Ext Trigger 2" select the trigger connector to which you have
connected the TTL signal. Note that the trigger connector must be configured as a
trigger input.
●
"Frequency"
A measurement starts when measured signal exceeds or falls below a specified
frequency.
The frequency trigger available for transient measurements is an online trigger. An
online trigger responds to a trigger event as soon as this event occurs while it is
capturing data (a live trigger, so to speak). An offline trigger, on the other hand, first
captures data, and looks if it can find a trigger event in that data.
●
"I/Q Power"
A measurement starts when the R&S
FSPN detects a rise or fall of the signal level
within the demodulation bandwidth (span).
This trigger source is only available for
narrow measurement mode.
Remote command:
TRIGger[:SEQuence]:SOURce
on page 393
Defining the trigger level and frequency
Trigger source other than the free run source initiate measurements on a certain condi-
tion.
For an external trigger, the condition is a "Level" value. The measurement starts when
the trigger signal meets or exceeds that level.
For a frequency trigger, the condition is a "Frequency" value. The measurement starts
when the input signal meets or exceeds that frequency.
Remote command:
Trigger level:
TRIGger[:SEQuence]:LEVel[:EXTernal<1|2>]
on page 392
Trigger frequency:
TRIGger[:SEQuence]:FREQuency
on page 391
PN Transient Analysis Configuration