3-10 Third Order Intercept (TOI) Spectrum Analyzer Performance Verification
3-34 PN: 10580-00303 Rev. D Model MS20xxB MM
20. Determine which signal is larger (the 799.851 MHz signal or the 800.151 MHz signal). Use the larger
value for max in the following formula to calculate the TOI for 800 MHz (refer to the example calculation
below the formula):
TOI = –20 + [(–20 – max) / 2] + 10 dBm
Example: Assume max = –72 dBm
Then: TOI = –20 + [(–20 – (–72))/2] + 10 = +16 dBm
21. Record the calculated 800 MHz TOI measurement in Table A-21 for MS2034B or Table A-38 for
MS2035B in Appendix A.
22. Turn Off the RF of the MG3692x Synthesized Signal Generator #1 and the MG3692x Synthesized Signal
Generator #2.
2400 MHz TOI Test
23. Disconnect the power splitter from the MS203XB.
24. Set the MG3692x Synthesized Signal Generator #1 to 2399.951 MHz CW, and set the MG3692x
Synthesized Signal Generator #2 to 2400.051 MHz.
25. On the ML2438A power meter, set the calibration factor to 2.4 GHz.
26. Connect the power sensor to the power splitter output. Refer to Figure 3-8.
27. Set the MG3692x Synthesized Signal Generator #1 RF to On and adjust the RF amplitude so that
–20 dBm appears at the power splitter output (approximately +16 dBm).
28. Turn Off the RF of the MG3692x Synthesized Signal Generator #1.
29. On the MG3692x Synthesized Signal Generator #2, turn the RF On, and adjust the RF amplitude so that
–20 dBm appears at the splitter output (approximately +16 dBm).
30. Turn Off the RF of the MG3692x Synthesized Signal Generator #2.
31. Disconnect the power sensor from the output of the power splitter and connect the power splitter output
to the MS203XB RF In connector through the Anritsu Model 34NN50A adapter. Refer to Figure 3-9.
32. Turn On the RF of both MG3692x #1 and MG3692x #2.
33. Set the MS203XB Center Frequency to 2400.151 MHz.
34. Press the Shift key and then the Trace (5) key. Press Trace A Operations, and set # of Averages to 2.
35. After two sweeps have occurred (Trace Count 2/2 appears on the left of the display), turn on a marker,
and press
Peak Search. Record the amplitude of the signal at 2400.151 MHz in Table A-21 for MS2034B
or Table A-38 for MS2035B in Appendix A.
36. Change the Center Frequency of the MS203XB to 2399.851 MHz.
37. After two sweeps have occurred (Trace Count 2/2 appears on the left of the display), turn on a marker,
and press Peak Search. Record the amplitude of this signal in Table A-21 for MS2034B or Table A-38 for
MS2035B in Appendix A.
38. Determine which signal is larger (the 2399.851 MHz signal or the 2400.151 MHz signal). Use the larger
value for max in the following formula to calculate the TOI for 2400 MHz (refer to the example
calculation below the formula):
TOI = –20 + [(–20 – max) / 2] + 10 dBm
Example: Assume max = –80 dBm
Then: TOI = –20 + [(–20 – (–80))/2] + 10 = +20 dBm
39. Record the calculated 2400 MHz TOI measurement in Table A-21 for MS2034B or Table A-38 for
MS2035B in Appendix A.
40. Turn Off the RF of both MG3692x #1 and MG3692x #2.
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