User Manual

Typical Characteristics of the R&S RT-ZHD
R&S
®
RT-ZHD07/15/16/60
38User Manual 1800.2588.02 ─ 01
Figure 4-8: Typical step response e.g. of the R&S RT-ZHD16 (Attenuation 'Low')
4.4 CMRR
The CMRR is good for low-frequency signals, but it continuously decreases for higher
frequencies. Therefore, the CMRR is usually specified as a function of frequency.
The figure below shows a typical CMRR with a symmetrical connection for an R&S RT-
ZHD differential probe. An asymmetrical connection to the test point can decrease the
CMRR. To achieve the best possible CMRR, the connection to the DUT should always
be as symmetrical as possible.
CMRR