Smith Chart; Smith Chart Measurement - Anritsu MS2024B Manual

Field Measurements
5-11

Smith Chart

The MS20xxB VNA Master or the S412E LMR 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.

Smith Chart Measurement

The following example shows how a Smith Chart can be used to measure the match of an
antenna. Figure 5-11
may not match the display on your instrument.
Procedure
1. Ensure that the instrument is in Vector Network Analyzer mode, and that the
Meas Menu soft key is toggled to Field.
2. Press the Measure function hard key and then press the Measurement Type soft key and
select 1-Port Smith.
3. Press the Freq/Dist function hard key and set the Start Frequency and Stop Frequency.
4. Press the Sweep function hard key and then the Data Points soft key to set the number
of data points (the larger the number of data points, the longer the maximum distance,
at the expense of a slower sweep speed).
5. Press the Shift key, then the Calibrate (2) key.
6. Press the Start Cal soft key and perform a 1-port calibration.
7. When the Calibration is finished, CAL: ON (OK) should be displayed with the trace data
in the instrument settings summary at the left side of the sweep window, and the trace
should be centered around 0 dB when the short or open is connected.
8. Connect the antenna to the VNA Port 1 connector on the instrument.
9. Use the File menu to save the measurement. Refer to the file management instructions
in the user guide for your instrument.
Vector Network Analyzer MG
shows a typical 1-port Smith Chart measurement. This screen display
PN: 10580-00289 Rev. K
5-11 Smith Chart
5-21