Svantek SV 104BIS, Руководство пользователя

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69 SV 104BIS User Manual
There are four basic parameters of audio recording available for all modes: Wave File Format ( PCM or
Extensible ), Filter ( Z, A, CB ), Sampling frequency ( 12kHz or 24kHz ) and Signal Gain (from 0 dB to 35 dB ).
Continuous mode means that the audio recording starts with the measurement start and stops with the
measurement stop.
Trigger Slope + / Trigger Slope
–
modes mean that the audio recording starts when rising value of the Leq
measured in the first profile by Trigger Step (with value equal to Logger step , 0.5 ms , 100 ms or 1 s ) passes
above/below the threshold level ( Trigger Level ), which means for Slope + that the previous result was below
the threshold level, and the next one became above the threshold level. The recording lasts for minimum time,
defined by the
Recording Limit parameter, and during this time the instrument continues to check the trigger
condition with
Trigger Step
interval. Provided that the
Trigger Step
is shorter than the
Recording Limit,
if
next trigger condition is met during the Recording Limit time, the instrument triggers recording again, so it will
be continued from this moment by additional Recording Limit time and so on. If during next recording time
there are no triggers, the recording will be stopped after the last trigger plus Recording Limit time.
Trigger Level + / Trigger Level
–
modes mean that the audio recording starts when the value of the Leq
measured in the first profile by Trigger Step (with value equal to Logger step , 0.5 ms , 100 ms or 1 s ) is
greater/lower than the threshold level ( Trigger Level ). In other cases, the reco
rding doesn’t start, but if it has
been already started it can be continued until the Recording Limit time has elapsed. If during the
Recording Limit time a trigger condition appears, the recording will be prolonged for another
Recording Limit time from the moment of that trigger condition and so on. If during next recording time there
are no triggers, the recording will be stopped after the last trigger plus Recording Limit time.
Figure 6-23
Slope +
vs
Level +
wave recording trigger
Note: In some cases, the instrument may split a wave file automatically! The reason for this is the
limited RAM of the instrument in which the audio data is buffered.