Rohde & Schwarz SMW200A - Receiving and Providing Trigger Signals

Configuring the Internal Baseband Source
R&S
®
SMW200A
244User Manual 1175.6632.02 ─ 16
Example:
This example is based on an ARB signal with 1 MHz clock frequency ("Baseband >
ARB > Clock Frequency = 1 MHz").
Step 1: Enable the following settings:
●
"ARB > Trigger In > Mode > Armed Auto"
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"ARB > Trigger In > Source > External Global Trigger 1"
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"ARB > Trigger In > External Delay Unit > Samples"
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"ARB > Trigger In > External Delay = 100 Samples"
The parameter "Actual External Delay = 100 us" displays the time delay in seconds.
Step 2: Enable the following settings:
●
"ARB > Trigger In > External Delay Unit > Time"
●
"ARB > Trigger In > Specified External Delay = 10 us"
Logically, the "Actual External Delay" changes to 10 us.
Step 3:
●
Switch to "ARB > Trigger In > External Delay Unit > Samples".
The value of "ARB > Trigger In > External Delay" is 10 samples.
Step 1 Step 2 Step 3
This principle applies for any external triggering and triggering via the other paths.
Receiving and Providing Trigger Signals
In test setups that combine the signal of two or more instruments and/or basebands it
is often required that:
●
The signal generation starts at a defined moment
●
The signal generation starts simultaneously (or with an exactly defined delay) in:
– All involved instruments
– All basebands of the same R&S SMW
The generation of simultaneous baseband signals within the same instrument
requires a common trigger event to define the signal generation start. This section
explains how the R&S SMW supports you to achieve this requirement.
For information on simultaneous signal generation start in multiple instruments,
see Chapter 9.3, "Generating Time-Aligned Baseband Signals", on page 608.
Common Functions and Settings in the Baseband Domain