Anritsu S412E Maintenance Manual page 41

Chapter 3 — Spectrum Analyzer Verification
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
following 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
22. Turn Off the RF of the MG3692x Synthesized Signal Generator #1 and the MG3692x Synthesized Signal
Generator #2.
2400 MHz TOI Test (for units with Option 6 installed)
1. Disconnect the power splitter from the S412E.
2. Set the MG3692x Synthesized Signal Generator #1 to 2399.951 MHz CW, and set the MG3692x
Synthesized Signal Generator #2 to 2400.051 MHz.
3. On the ML2438A power meter, set the calibration factor to 2.4 GHz.
4. Connect the power sensor to the power splitter output. Refer to
5. 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).
6. Turn Off the RF of the MG3692x Synthesized Signal Generator #1.
7. 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).
8. Turn Off the RF of the MG3692x Synthesized Signal Generator #2.
9. Disconnect the power sensor from the output of the power splitter and connect the power splitter output
to the S412E RF In connector through the Anritsu Model 34NN50A adapter. Refer to
on page 3-20.
10. Turn On the RF of both MG3692x #1 and MG3692x #2.
11. Set the S412E center frequency to 2400.151 MHz.
12. Press the Shift key and then the Trace (5) key. Press Trace A Operations, and set # of Averages to 2.
13. 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
14. Change the Center Frequency of the S412E to 2399.851 MHz.
15. 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
16. 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 following the formula):
TOI = –20 + [(–20 – max) / 2] + 10 dBm
Example: Assume max = –80 dBm
Then: TOI = –20 + [(–20 – (–80))/2] + 10 = +20 dBm
17. Record the calculated 2400 MHz TOI measurement in
18. Turn Off the RF of both MG3692x #1 and MG3692x #2.
S412E MM
Table A-15.
Table
Table
PN: 10580-00324 Rev. N
3-9 Third Order Intercept (TOI)
Figure 3-3 on page 3-18.
Table A-15.
A-15.
A-15.
Figure 3-4
3-21