Rohde & Schwarz SMM100A, Руководство пользователя

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Configuring the internal baseband source
R&S
®
SMM100A
95 User Manual 1179.1341.02 ─ 05
For information on the trigger signals used in the RF domain, see Chapter 7.10.1, "Sig-
nal generation and triggering in the sweep and list modes" , on page 321.
Trigger
The trigger signals are internally generated or externally supplied signals which start
signal generation at a particular point in time. However, signal generation can also take
place without triggering. In this case, the signal generation stars immediately after the
modulation is enabled.
Trigger event
A trigger event is caused by the received trigger signal. Another possibility to provoke a
trigger event is to execute trigger manually. The "Arm" function stops the signal gener-
ation until subsequent trigger event occurs.
● Trigger sources ....................................................................................................... 95
● Impact of the trigger modes on the signal generation .............................................96
● Impact of the additional trigger settings .................................................................. 99
● Receiving and providing trigger signals ................................................................ 102
Trigger sources
The provided trigger sources are divided into two main groups, internally generated or
externally supplied trigger signals.
●
Internal ("Internal")
Internal trigger signals are generated by the instrument itself.
●
External ("External Global Trigger")
External trigger signal is generated by an external trigger source.
The instrument expects the trigger signal at one of the T/M/C or User x connectors.
Refer to
Configuring local and global connectors for information on how to config-
ure the required settings.
●
External ("Baseband Sync In")
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 9.2.1, "Connecting multiple instruments in primary-secondary instru-
ment mode" , on page 442.
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.
However, the polarity and impedance characteristics of the external signals are identi-
cal 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 4.4.2.1, "Trigger settings" , on page 109
●
Chapter 11.2.5, "Global connectors settings" , on page 534
Common functions and settings in the baseband domain