3-9 Amplitude Accuracy Spectrum Analyzer Performance Verification
3-20 PN: 10580-00303 Rev. D Model MS20xxB MM
3-9 Amplitude Accuracy
The following tests are used to verify the amplitude accuracy of the spectrum analyzer in the MS2034B and
MS2035B VNA Master. The tests consist of:
• “50 MHz Amplitude Accuracy Verification”
• “Amplitude Accuracy Across Frequency Verification”
50 MHz Amplitude Accuracy Verification
Equipment Required
• Synthesized Signal Generator, Anritsu Model MG3692X
• K(m) to N(f) Adapter, Anritsu Model 34RKNF50
• 10 MHz Reference Standard
• BNC(m) to BNC(m) Coaxial Cable, Anritsu part number 2000-1627-R
• Dual Channel Power Meter, Anritsu Model ML2438A
• High Accuracy Power Sensors (Quantity 2), Anritsu Model SC7400
• RF Coaxial Cable, Anritsu Model 15NN50-1.5C
• Power Splitter, Aeroflex/Weinschel Model 1870A
• 10 dB Fixed Attenuator, Aeroflex/Weinschel Model 44-10
• N(m) to N(m) Adapter, Anritsu Model 34NN50A
Procedure
Test Setup Characterization
1. Turn on the 10 MHz Reference Standard, the ML2438A Power Meter, the MG3692X Signal Generator,
and the Model MS20xxB VNA Master.
2. Install the 34RKNF50 Adapter to the MG3692X Signal Generator output and then connect the
15NN50-1.5C Cable to the 34RKNF50 Adapter.
3. Connect the Power Splitter to the open end of the 15NN50-1.5C Cable.
4. On the power meter, press the Channel front panel key, the Setup soft key and then the Channel soft key
to display Channel 2 Setup menu.
a. Press the Input key twice to set the Input Configuration to B.
b. Press the Sensor key to display both Sensor A and Sensor B readings.
c. Connect the power sensors to the Calibrator port of the power meter and calibrate the sensors.
d. Press the Sensor key, the Cal Factor soft key, and then the Freq soft key.
e. Use the numeric keypad to enter 50 MHz as the input signal frequency. Do this for both Sensor A
and Sensor B. This sets the power meter to use the proper power sensor cal factor.
5. Connect Sensor B to one of the Power Splitter outputs.
Note Before continuing, allow a 30-minute warm up period for the internal circuitry to stabilize.
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