Configuring the Internal Baseband Source
R&S
®
SMW200A
236User Manual 1175.6632.02 ─ 30
Trigger Sources
The provided trigger sources are divided into two main groups, internally generated or
externally supplied trigger signals.
●
Internal ("Internal" and "Internal Baseband A/B")
Internal trigger signals are generated by the instrument itself and can be used inde-
pendently per baseband or routed from one to the other. This feature is useful, if
the signal generation start in the basebands has to be synchronized.
●
External ("External Global Trigger 1/2", "External Local Trigger", "External Local
Clock")
External trigger signal is generated by an external trigger source.
– An external local trigger/clock signal is dedicated to the baseband board this
signal is supplied at.
(That is, the board the local T/M/C connector is located at).
An external local trigger/clock signal can be internally routed and used for syn-
chronous triggering of all other basebands.
– An external global trigger signal can be supplied to one or simultaneously to all
the basebands. The latter possibility is the useful, if common triggering of all
basebands and synchronous generation start are required.
The instrument expects the trigger signal at one of the T/M/C or USER x connec-
tors. Refer to Chapter 12.2, "Configuring Local and Global Connectors",
on page 714 for information on how to configure the required settings; see also
Figure 12-1.
●
External ("Baseband Sync In")
Option: R&S SMW-B9
In primary-secondary instrument mode, secondary instruments are triggered by the
active edge of the synchronization signal.
This trigger source is selected automatically and cannot be changed.
See Chapter 10.3.1, "Connecting Multiple Instruments in Primary-Secondary
Instrument Mode", on page 640.
The trigger mode setting, the selection of the trigger source and the setting of a delay
and trigger suppression in the case of external triggering are carried out independently
for each of the basebands or, if there is coupled trigger settings, jointly for all base-
bands.
However, the polarity and impedance characteristics of the external signals supplied at
the USER connectors are identical for all basebands using this signal.
A signal which marks the trigger event can be output at the T/M/C connectors.
Related settings:
●
Chapter 5.5.2.1, "Trigger Settings", on page 252
●
Chapter 12.2, "Configuring Local and Global Connectors", on page 714
●
Trigger settings in the dialogs of the firmware options
Common Functions and Settings in the Baseband Domain
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