HP 85106D, Manual

Page: 66 / 244

HP 85106D mm-Wave System 2-21
Operation
Response and Isolation Calibration
Response and Isolation Calibration
The Response calibration provides vector normalization of the system
magnitude and phase frequency response to that of the selected calibration
standard for the current selected parameter. The frequency response error is
all that is removed with this calibration. This calibration type is useful for
measuring a well-matched device or for a required quick check of device
performance.
The Response & Isolation calibration accounts for both frequency response
and isolation effects. In reflection measurements, both tracking and
directivity errors are removed. In transmission measurements, tracking and
crosstalk errors are removed. Two standards are required.
•
The response standard is a flush short for reflection measurements or a
zero length thru for transmission measurements.
•
The isolation standard, for either transmission or reflection
measurements, is the fixed load.
The Response/Isolation calibration is useful when measuring well matched
or high loss devices.
1. Select the parameter to measure by pressing [
S11
], [
S21
], [
S12
], or [
S22
].
Set the frequency range for the measurement.
2. Begin the calibration process by pressing the following keys:
[
CAL
] then {
CAL KIT 1 WR-xx
}
{
CALIBRATE:RESPONSE
} or {
CALIBRATE:RESPONSE & ISOL’N
}
Proceed to step 3 for a Response calibration or proceed to step 4 for a
Response & Isolation calibration.
3. For the Response calibration, connect the calibration standard:
•
A thru for transmission
•
A short at Port 1 or Port 2 for reflection.
a. Press the {
SHORT
} or {
THRU
}softkey. The softkey is underlined after
the standard is measured.
b. Press {
DONE RESPONSE
}. Proceed to step 5.