151Functions and outputs
HBMQuantumX
RMS (root mean square) function
RMS is computed from one of the module’s 4 analog input channels according to the
formulaL
Where f(x) denotes the input channel signal and T the time window (in ms).
Keep in mind the following notes when working with RMS channels:
S The maximum sample rate is restricted to 4800 (2400) Hz
S The output (sample) rate of the RMS channel must not be higher than the sample rate of
the input channel
S Filters set for the MX878/879 do not apply to RMS channels. These channels are always
unfiltered. However, the input signal is filtered
Peak Detection function
Keep in mind the following notes when working with peak monitor channels:
S The maximum sample rate is restricted to 4800 Hz
S The sample rate of the peak monitor channel must not be higher than the sample rate of
the input signal
S The peak units do not accept other peak units or RMS as input
Each peak detection unit can monitor either the Min or the Max of one of 4 signals ”visible as
isochronous” within the system.
A peak unit may operate in different modes:
S RUN: peak value will be continuously updated
S HOLD: last peak value will be ”frozen”
S PEAK: peak detection enabled
S FOLLOW: peak detection disabled, i.e. the channel yields the original signal of the input
channel
The following combinations are possible:
Graph for MAX−PEAK−RUN
Graph for MAX−PEAK−HOLD
Graph for MAX−Follow−HOLD
This also applies to the minimum values.
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