Newtons4th PSM3750 NumetriQ, Startup Manual, Page: 40 / 104

PSM3750 Quick User Guide
Page 38
7.6 FRA Sweep with AC Coupling
When conducting a sweep in FRA Mode it is always advisable to set the coupling
to AC only. AC coupling is useful because the DC component of a signal acts as a
voltage offset, and removing it from the signal can increase the resolution of
signal measurements as shown in the following screenshots.
Signal generator set as below with a 100mVpk sinewave and a 5V dc offset
connected across
the PSM3750’s CH1 & CH2 Inputs.
CH1 settings with coupling left as ac+dc CH2 settings with coupling set to ac
Autoranging is left at “Full Autorange” on both channe ls this will display the peak
range scale on both channels with the different coupling configured.