PicoVNA 106 6 GHz Vector Network Analyzer
41
© 2017 Pico Technology
pv106ug r1
6.2.2
Calibration steps for S11 measurements
The calibration for S
11
measurements performs a three term error correction calibration. Note that if the
device to be tested has a female connector, then a female calibration kit should be used for best results. The
typical steps are as follows:
1. Select the calibration kit (
Tools > Calibration kit > Load P1 kit > Apply
)
2. Set the bandwidth and test power (
Enhancement
button)
3. Set the frequency range and measurement steps (
Calibration
button)
4. Select S
11
calibration (in
Calibration
window)
5. Connect adaptor and test cable to port 1 of the instrument
6. Connect each standard in turn and click appropriate
Standard
button (in
Calibration
window)
7. When all 3 Standards are done click
Apply
(in
Calibration
window)
8. If desired, for later use, save calibration (
File > Save cal
)
9. Connect device to be tested and click
Start
Tips:
For best linearity and dynamic range combination use a test power level of 0 dBm
For best accuracy calibrate using the same bandwidth you intend to use for your measurements
You can remeasure any standard at any stage before completing the calibration. Just reconnect the
standard and click again on the appropriate
Standard
button before completing the calibration
6.2.3
Calibration steps for S21 measurements
The simple S
21
calibration is a frequency response calibration. Sometimes it is referred to as normalization
and only corrects for response characteristics of instrument and external connections. The typical steps are
as follows:
1. Set the bandwidth and test power (
Enhancement
button)
2. Set the frequency range and measurement steps (
Calibration
button)
3. Select S
21
calibration (in
Calibration
window)
4. Connect adaptors and test cable 2 to port 1 of the instrument
5. Connect ends of test cable together (the ‘through’ connection) and select
Through
(in
Calibration
window)
6. Connect 50 Ω load to the ends of test cables (to perform the isolation step) and select
Isolation
(in
Calibration
window)
7. Click
Apply
(in
Calibration
window)
8. If desired, for later use, save calibration (
File > save cal
)
9. Connect device to be tested and click
Start
Tips:
For best dynamic range, use a test power level of +6 dBm and calibrate using the same bandwidth you
intend to use for your measurements
For best accuracy (linearity) use a test power level of –3 dBm and calibrate using the same bandwidth
you intend to use for your measurements
6.2.4
Calibration steps for S11 and S21 measurements
The 'S
11
+ S
21
' calibration provides three term error correction for S
11
measurements and Source match
correction for S
21
measurements. The typical steps are as follows:
1. Select the calibration kit (
Tools > Calibration kit > Load P1 kit > Apply
)
2. Set the bandwidth and test power (
Enhancement
button)
3. Set the frequency range and measurement steps (
Calibration
button)
4. Select ’S
11
+ S
21
’ calibration (in
Calibration
window)
