Keysight M8190A - Page 28

1 Introduction
28 M8190A User’s Guide
The four modes have different amplitude vs. frequency responses, which are shown
in the figure below.
Figure 1-5: DNRZ/NRZ/RZ/Doublet Frequency Response
This is only comparing the idealized response of the modes, and ignores the roll off
due to finite switching risetimes, output RC time constant and other losses
DNRZ
Best signal performance in 1st Nyquist region
NRZ
For time domain applications, less ripple at 2 f
sample
, more
distortions than DNRZ
Doublet
More output power and flatter frequency response in 2nd
Nyquist region limited to f
sample
> 1 GSa/s