Agilent Technologies ENA Series

Chapter 4 99
Calibration
Calibration Types and Characteristics
4. Calibration
Calibration Types and Characteristics
Table 4-1 shows the different types of calibrations and the features of each method.
Table 4-1 Calibration Types and Characteristics
Calibration Method Standard(s)
Used
Corrected Error Factor Measurement
Parameters
Characteristics
No calibration None None All parameters • Low accuracy
• Calibration not required
Response
Calibration
*1
•OPEN or
SHORT
*2
•LOAD
*3
Following 2 error terms:
•Reflection Tracking (Er)
•Directivity (Ed)
*3
S11
(Reflection
characteristics
at 1 port)
•Medium-level accuracy
•Quick calibration
•Isolation calibration improves the
accuracy in a reflection
measurement of a DUT with high
return loss
•THRU
•LOAD
*3
Following 2 error terms:
•Transmission Tracking (Et)
•Isolation (Ex)
*3
S21
(1 direction
transmission
characteristics
at 2 ports)
•Medium-level accuracy
•Quick calibration
•Isolation calibration improves the
accuracy in a transmission
measurement of a device with high
insertion loss
1-Port Calibration ECal module
(2-port/4-port)
Following 3 error terms:
•Directivity (Ed)
•Source Match (Es)
•Reflection Tracking (Er)
S11
(Reflection
characteristics
at 1 port)
•1-port measurement with the
highest degree of accuracy
•Quick calibration with low chance
of operator error
•OPEN
•SHORT
•LOAD
•Highly accurate 1-port
measurement
Full 2-Port
Calibration
*1
ECal module
(2-port/4-port)
Following 12 error terms:
•Directivity (Ed1,Ed2)
•Isolation (Ex21,Ex12)
*3
•Source Match (Es1,Es2)
•Load Match (El12,El21)
•Transmission Tracking
(Et21,Et12)
•Reflection Tracking (Er1,Er2)
S11,S21,S12,S
22
(All
S-parameters
at 2 ports)
•Highly accurate 2-port
measurement
*4
•Quick calibration with low chance
of operator error
•OPEN
•SHORT
•LOAD
•THRU
•Highly accurate 2-port
measurement
*4
Full 3-Port
Calibration
*5*1
ECal module
(2-port
*6
/
4-port)
Following 27 error terms:
•Directivity (Ed1,Ed2,Ed3)
•Isolation
(Ex21,Ex31,Ex12,Ex32,Ex13,Ex2
3)
*3
•Source Match (Es1,Es2,Es3)
•Load Match
(El21,El31,El12,El32,El13,El23)
•Transmission Tracking
(Et21,Et31,Et12,Et32,Et13,Et23)
•Reflection Tracking (Er1,Er2,Er3)
S11,S21,S31,S
12,S22,S32,S1
3,S23,S33
(All
S-parameters
at 3 ports)
•Highly accurate 3-port
measurement
*4
•Quick calibration with low chance
of operator error
•OPEN
•SHORT
•LOAD
•THRU
•Highly accurate 3-port
measurement
*4