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The Spectrum Application

R&S

FPC

113User Manual 1178.4130.02 ─ 07

"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 FPC.

Note that the BNC connector has to be configured as a trigger input in the

instrument setup.

Tip: As long as the measurement hasn't started, the R&S FPC displays "Waiting

for Trigger" in the diagram area.

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 FPC 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 14-2).

Table 14-2: 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

14.8 Trace Configuration

Access: "Trace"

Access: "Setup" > "Config Overview" > "Analysis" (selected settings)

Remote commands to configure traces:

●

Chapter 19.12.7, "Traces", on page 265

The trace is the graphical representation of the measured spectrum. In the diagram, it

is represented by a colored graph. Depending on the trace configuration, the R&S FPC

evaluates and displays the measurement data differently.

Trace Configuration

R&S FPC Series User Manual

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