Combined Mode (Fds And Pdc) - Omicron Lab SPECTANO 100 Quick Start Manual

SPECTANO 100 Quick Start Guide
5.7

Combined mode (FDS and PDC)

12
SPECTANO 100 combines the PDC with the FDS principle and thus
significantly reduces the testing time to exclusive frequency domain
measurements. PDC measurements can be accomplished in a short time but
are limited to low frequencies while FDS measurements are feasible for high
frequencies but take very long at low frequencies. It combines the advantages
of both principles. It measures data in the time domain for frequencies below
100 mHz. This reduces the measurement time up to 75% compared to exclusive
FDS measurements. For example, a FDS measurement from 1 kHz to 100 µHz
will take 11 hours, SPECTANO 100 will acquire this data in less than 3 hours
using the combined FDS and PDC measurement. The maximum test frequency
range for the combined mode is 20 µHz to 5 kHz.
Test duration
Figure 5-1 Comparison of measurement methods
FDS
PDC
Combined
Frequency band