Configuring the Internal Baseband Source
R&S
®
SMBV100B
102
User Manual 1178.4460.02 ─ 03
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"(External) Trigger Delay"
You can apply a definable number of symbols to delay the
start
trigger event of an
externally supplied trigger signals
This feature is useful to:
–
Simulate the time delay between a base station signal and a user equipment
signal, for example during base station tests
–
Compensate for known propagation delays or a timing offset in the test setups
●
"(External) Trigger Inhibit"
You can suppress the effect of a restarted trigger signal in the "Retrigger" trigger
mode for a definable number of symbols.
During base station tests for example, this feature enables the trigger suppression
for a definable number of frames and yet the signal can still be generated synchro-
nously. In each frame, the base station generates a trigger which would cause a
signal generation restart every time but for the suppression.
Example:
A trigger delay of 1000 samples means that after a trigger event, any subsequent trig-
ger signal is ignored for the space of 1000 samples.
Figure 3-9: Trigger delay and trigger inhibit in trigger mode retrigger
Specifying delay and inhibit values in time units
Suppressing and delaying trigger events
introduces the concept of delaying and
suppressing trigger events.
The delay and inhibit values are expressed in the units of the generated signal but you
can also define the exact delay or inhibit period directly as a time value (e.g. in sec-
onds).
Common Functions and Settings in the Baseband Domain
