The Spectrum Application
FPC1000
91
User Manual 1178.4130.02 ─ 02
The video trigger is available for time domain measurements (span = 0). (In the
frequency domain, a measurement would never start with the video trigger
because there is no guarantee that there is a signal that generates video volt-
age at the start frequency.)
● "External Rise" / "External Fall"
A measurement starts on the rising or falling edge of an external trigger signal.
"External Rise": the measurement starts when the trigger signal rises above
1.4
V (a TTL signal level).
"External Fall": the measurement starts when the trigger signal falls below
1.4
V (a TTL signal level).
You can connect the external trigger source to the corresponding BNC connec-
tor on the rear panel of the R&S
FPC1000.
Note that the BNC connector has to be configured as a
instrument setup.
Defining a trigger delay
When you are using an external trigger, you can delay the start of the measurement
with respect to the trigger event. Thus, you can include time differences between the
trigger event and the measurement.
1. Press the "Sweep" key to open the sweep menu.
2. Select the "Trigger" menu item to open the trigger menu.
3. Select the "Trigger Delay" menu item.
The R&S
FPC1000 opens an input field to define the delay time.
The range of the trigger delay is between 0
µs to 100
s. The resolution with which
you can select the delay time depends on the subrange of the delay time (see
Table 9-2: Trigger delay dependencies
Trigger delay
Resolution
0
s to 1
ms
10
μs
1
ms to 10
ms
100
μs
10
ms to 100
ms
1
ms
100
ms to 1
s
10
ms
1
s to 10
s
100
ms
10
s to 100
s
1
s
9.8 Trace Configuration
Access
: "Trace"
Access
: "Setup" > "Config Overview" > "Analysis" (selected settings)
Trace Configuration
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