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SV 971A User Manual

4.5.3 Configuring Logger trigger – Logger Trigger

In the Logger Trigger screen, you can configure the

way the logger results are to be registered in the logger

file. It is a context list of parameters in which the trigger

can be switched Off or On by selecting its type (Level+

or Level–) in the Trigger position.

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When the trigger is selected, other parameters appear in the list: a measured result that is checked for a

trigger condition (Source), a threshold level (Level) as well as a number of results saved in the logger

before the trigger condition is met (Pre) and the number of the results saved in the logger after the last

trigger condition is met during logging (Post).

Note: In the Simple interface mode, the Logger Trigger position is hidden, but the instrument

will use settings previously defined in the Advanced mode or default settings (Trigger: Off).

Level trigger

The Level+/Level– trigger enables logging of the time-history results

(Logger Results) with the Logger Step under the condition: value of the LEQ

result (Source) averaged by the Logger Step period is greater/lower than the

threshold value (Level). In other cases, the logging is skipped. Due to this type

of trigger it is possible to separate results related to the low/high noise level.

The logging is active only when the

summary results are measured, i.e. from

the measurement start till the

measurement stop.

This means, for example, that when the

measurement is waiting for a trigger

condition, logging is skipped, even if the

logger trigger condition is met.

Note: When logging is waiting for the level trigger the “level” icon

appears alternatively with the „logger” icon.

Source result

Only one measured result (Source) can be used for checking trigger condition in the Level Meter mode,

namely the instantaneous LEQ from the first profile (with appropriate filter and detector), which is denoted

here as Leq(1). This position cannot be changed.

Threshold level

The threshold value (Level) can be set in the range from 24 dB to 136 dB. The

Source value compares with the Level value every 0.5 milliseconds.

Svantek SV 971A User Manual

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