Agilent Technologies ENA Series User Manual page 102

Calibration
Measurement Errors and their Characteristics
Directivity error (Ed)
Directivity errors are caused by the fact that, in a reflection measurement, signals other
than the reflection signal from the DUT are received by receiver T1 (Figure 4-1) through
the directivity coupler. When a certain port is a stimulus port, this error can be defined as a
constant value for each stimulus port because the state of the termination at the other ports
does not change. The number of directivity errors of the E5070B/E5071B is the number of
stimulus ports you use.
Ed1
Ed2
*1
Ed3
*2
Ed4
*1.Options 313, 314, 413, and 414 only
*2.Options 413 and 414 only
Isolation error (Ex)
An isolation error (crosstalk error) is caused by signals other than the transmission signal
of the DUT leaking to the test receiver of the transmission measurement port in
transmission measurements. When a certain port is a stimulus port, an isolation error is
defined for each of the other ports. Therefore, the number of isolation errors for the
E5070B/E5071B is the total number of combinations of stimulus ports and response ports.
*1 *2
Ex21, Ex31 , and Ex41
*1 *2
Ex12, Ex32 , and Ex42
*1 *1
Ex13 , Ex23 , and
*2
Ex43
*2 *2
Ex14 , Ex24 , and
*2
Ex34
*1.Options 313, 314, 413, and 414 only
*2.Options 413 and 414 only
96
Directivity error of port 1
Directivity error of port 2
Directivity error of port 3
Directivity error of port 4
Isolation error when port 1 is a stimulus port
Isolation error when port 2 is a stimulus port
Isolation error when port 3 is a stimulus port
Isolation error when port 4 is a stimulus port
Chapter 4