Concepts and Features
R&S
®
ZNC
105
User Manual 1173.9557.02 ─ 13
Zeroing
Zeroing calibrates the external power meter by adjusting its reading at zero signal power.
For this purpose, the RF cable between the analyzer and the power sensor must be
disconnected (see tips below!). R&S power sensors and power meters automatically
detect the presence of any significant input power. This aborts zeroing and generates an
error message. Zeroing can take a few seconds, depending on the power meter model;
refer to the documentation of your external power meter for more information.
Repeat zeroing
●
During warm-up after switching on or connecting the instrument
●
After a substantial change of the ambient temperature
●
After fastening the power meter to an RF connector at high temperature
●
After several hours of operation
●
When very low-power signals are to be measured, e.g. less than 10 dB above the
lower measurement limit.
A reset of the network analyzer does not affect the last zeroing result.
Optional Extensions and Accessories