User`s manual

Table Of Contents
Figure 9.8
9.8 FFT AND MULTI-METER
There is a close interaction between FFT and Multi-meter operations. The two
measurements share the same acquisition and processing core. Should they
operate together the FFT control panel acts as the master while Multi-meter follows
as the slave. In this situation, among other peculiarities, the Go and Stop buttons
of the Multi-meter are disabled; if an FFT acquisition is started then the Multi-meter
runs as well, the same when you stop the measurement. More on this is in section
8.6.
9.9 FFT AND Leq ANALIZER
It is possible to execute FFT or RTA analysis while an Leq measurement is taking
place. The following figure shows the analysis of a sample of speech done with Leq
and RTA in parallel.
Some limitations apply to FFT settings, in particular it is not possible to select an
FFT size higher than 32768. See also chapter 16.
9 FFT, RTA AND “LIVE” TRANSFER FUNCTION 109