2-Port Phase Measurement; Smith Chart - Anritsu MS2024A/MS2026A User Manual

3-6 VNA Measurements - 2-Port Phase Measurement

2-Port Phase Measurement

The following example compares the phase of two cables using a 2-port phase measurement.
Figure 3-15 shows an S21 Phase measurement (using the VNA measurement menu).
Procedure
1. Press the
Measurement
S11 Reflection | Phase
2. Press the
Freq/Dist
3. Press the
Start Cal
cable.
4. Connect Cable A (the reference cable) between the
5. Press the
Shift
6. Select the
Copy Trace to Display Memory
7. Remove Cable A and connect Cable B (the cable under evaluation).
8. Select the
Trace Minus Memory
cables.
Figure 3-15. S21 Phase Measurement (VNA Measurement Menu Shown)

Smith Chart

The VNA Master can display 1-port measurements in a standard Normalized 50 Ohm or 75
Ohm Smith Chart. When markers are used, the real and imaginary components of the Smith
Chart value are displayed.
Anritsu Master Software Tools includes more options and a calculator that can easily show
the values of the return loss, VSWR, or reflection coefficient of a specific Smith Chart.
Limit Lines in a Smith Chart will appear as circles (constant reflection coefficient) and can be
entered in VSWR units.
3-22
function hard key and select
(VNA menu).
function hard key and set the Start Frequency and Stop Frequency.
soft key and perform a 2-port calibration at the end of a phase stable
key, then the
Trace
soft key to view the difference in phase between the two
Chapter 3 — Vector Network Analyzer
Next | 1-Port Phase
RF Out
(5) key.
soft key.
MS20xxA VNA Master UG 10580-00166 Rev. C
(Field menu) or
and connectors.
RF In