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Chapter 2 29

Test Descriptions

Input VSWR

Measuring VSWR from 10 MHz to 500 MHz

Step 1. Connect the test equipment as shown in Figure 2-4 on page 28.

Step 2. Set the Network Analyzer Start/Stop frequencies from 10 MHz to

500 MHz.

Press the

Start key then 1, 0, M/µ; then press the Stop key and 5, 0, 0 M/µ.

Step 3. On the NFA ensure that the preset is set to the factory settings (press

the

System key and More, Power On/Preset, Power On (Preset) and

Preset (Factory)).

Step 4. On the NFA press the

Preset key and wait for the routine to finish

Step 5. Set sweep to single (press the

Sweep key and Sweep Mode: Single).

Step 6. Set the frequency mode to fixed (press the

Frequency/Points key and

Freq Mode, Fixed).

Step 7. Set the fixed frequency to 250 MHz (press the

Frequency/Points key and

Fixed Freq, 2, 5, 0, MHz).

Step 8. Restart the measurement sweep on the DUT (press the

Restart key).

Step 9. Set the Network Analyzer to autorange (press the

Scale Ref key and

Auto Scale).

Step 10. Using the marker peak function on the network analyzer, determine the

maximum displayed VSWR over the measured frequency range (press

the

Marker Fctn key and Mkr Search [ON], Search: Max).

Step 11. Record the maximum displayed signal frequency and VSWR on the Test

Record.

Step 12. Verify that the measured VSWR from 10 MHz to 500 MHz is within the

published specification.

Keysight NFA Series User Manual

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