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40
Table 4-1 Error correction classification
Correction type
Corresponding
measurement type
Error corrected
Standard piece required
Freq Resp.
Transmission
or
reflection measurement
(with
low
accuracy
requirement).
Freq Resp.
Transmission
via
thorough method via
reflection via the open
or short device
Response and isolation
Measure
the
transmission of the high
insertion loss device or
reflection of the high
return loss device. The
measurement accuracy
is lower than that of the
single port or full 2
ports.
The
transmission
frequency response and
isolation or reflection
directivity.
With
the
standard
isolation piece (load)
added in addition to the
standard piece used for
response correction
S11 single port
Reflection
measurementof any
single-port
piece or
well-connected
dual-port piece.
Directivity,
source
matching and frequency
response
Open-circuit
device,
short device and load
S22 single port
Reflection
measurementof any
single-port
piece or
well-connected
dual-port piece.
Directivity,
source
matching and frequency
response
Open-circuit
device,
short device and load
Full 2 ports
Transmission
or
reflection measurement
of dual-port piece with
the high accuracy.
Directivity,
source
matching,
load
matching,
isolation,
frequency
response,
and
forward
and
reverse directions.
Open-circuit
device,
short device, load and
circuit-closer (two loads
adopted for isolation)
3
Calibration precautions:
Measurement parameters
Calibration is conducted for parameters rather than channels. When parameter is selected, the
instrument will check the calibration data used and use the data of such parameter. For example, when
conducting B/R transmission response calibration and S11 single-port calibration on A/R at the same
time, the microwave analyzer keeps on calibration and correction for the parameter displayed. Once a
specific parameter or input is calibrated, such parameter measurement will be calibrated at any channel
provided the incentive value is coupled. Parameter must be selected first before response and isolation
calibration. Parameters will be selected automatically for other correction processes. In case of any
channel change during calibration, the process executed will be invalid. When a calibration type is
selected, the measurement parameter will be changed automatically.
Standard piece measurement
The measurement sequence for several different standard pieces to be measured at the same time can
be ignored, for example, an open-circuit device, a short-circuit device and a load. Any standard piece
can be remeasured before [OK] is pressed. Change in standard piece is normal during measurement. In
case of a standard piece subjected to multiple measurement, correction shall be conducted on the latest
measurement data.
Recalibration
