Model MS20xxB MM PN: 10580-00303 Rev. D 2-1
Chapter 2 — VNA Performance Verification
2-1 Introduction
This chapter contains tests that are used to verify the Vector Network Analyzer performance of VNA Master
Models MS2024B, MS2025B, MS2034B, and MS2035B. Blank performance verification test records are
provided in Appendix A. Make copies of the blank test records and use them to record measured values.
The vector network analyzer performance verification tests are as follows:
• “Frequency Accuracy” on page 2-1
• “Transmission Dynamic Range” on page 2-2
• “Return Loss Measurement Accuracy Verification” on page 2-3
2-2 Frequency Accuracy
The following test can be used to verify the CW frequency accuracy of the vector network analyzer of the
VNA Master. Measurement calibration is not required for this test.
Equipment Required
• Frequency Counter, Anritsu Model MF2412C
• 10 MHz Time Base Reference
• RF Coaxial Cable, Anritsu Model 15NN50-1.0B
• BNC male to BNC male Cable, Anritsu Model 2000-1627-R
Procedure
1. Connect a BNC cable between the output connector of the external Time Base Reference to the Reference
Input connector of the Frequency Counter.
2. Turn on the Frequency Counter.
3. Press the On/Off key to turn on the VNA Master.
4. Press the Shift key and then the Mode (9) key. Use the rotary knob to highlight Vector Network Analyzer
and then press the Enter key to switch to VNA mode.
5. Press the Shift key and then the Preset (1) key. Press the Preset button on the touch screen submenu to
set the instrument to the factory preset state.
6. Press the Measure button on the touch screen main menu. Then press the S Parameter submenu button.
Select S21.
7. Press the Number of Traces submenu button and then press 1.
8. Press the Graph Type submenu button. Use the rotary knob to highlight Log Mag and press the Enter key
to select it.
9. Press the Maximize Active Trace submenu button.
10. Press the Sweep main menu button and then change the Data Point to 1000.
Caution Verify that all equipment has warmed up for at least 30 minutes before making any measurements.
Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
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