R&S ZNA26 - Page 180

Concepts and features
R&S
®
ZNA
180User Manual 1178.6462.02 ─ 20
Advantages of automatic calibration
Automatic calibration is faster and more secure than manual calibration, because:
●
There is no need to connect several standards manually. The number of connec-
tions to be performed quickly increases with the number of ports.
●
Invalid calibrations due to operator errors (e.g. wrong standards or improper con-
nections) are almost excluded.
●
No need to handle calibration kit data.
●
The internal standards do not wear out because they are switched electronically.
Limitations of automatic calibration
Calibration units do not contain characterized Through standards, so calibration types
TOM, TSM, TRM, TRL, TNA are not available.
4.5.5.1 Connecting the calibration unit
The calibration units provide the following connectors:
●
USB type B connector at the rear, which is used to power-supply and control the
unit. A USB cable for connection to the network analyzer is provided with the cali-
bration unit.
●
RF connectors, which are connected to the test ports. For all Rohde & Schwarz
calibration units except a customized R&S ZN-Z51, the connector types are equal
for all ports.
To connect the unit,
1. Switch on and power up your network analyzer.
2. To protect your equipment against ESD damage, use the wrist strap and grounding
cord supplied with the instrument and connect yourself to the GND connector at
the front panel.
3. Connect the USB type A connector of the USB cable to any of the USB type A con-
nectors of the analyzer. Connect the USB type B connector of the USB cable to the
USB type B connector of the calibration unit.
4. Wait until the operating system has recognized and initialized the new hardware.
When the unit is connected for the first time, this may take longer than in normal
use.
The unit is ready to be used, see Chapter 4.5.5.2, "Performing an automatic calibra-
tion", on page 181.
Calibration