Chapter 3 — Spectrum Analyzer Verification 3-9 Third Order Intercept (TOI)
S412E MM PN: 10580-00324 Rev. N 3-19
800 MHz TOI Test
1. Connect the equipment as shown in Figure 3-3. The power splitter will be used as an RF combiner
(the normal RF outputs will become inputs, and the normal input will become the RF output).
2. Set the MG3692x Synthesized Signal Generator #1 to 799.951 MHz CW, and set the MG3692x
Synthesized Signal Generator #2 to 800.051 MHz.
3. Turn Off the RF of the MG3692x Synthesized Signal Generator #1 and the MG3692x Synthesized Signal
Generator #2.
4. On the ML2438A power meter, zero the sensor and set the calibration factor to 800 MHz.
5. Connect the power sensor to the power splitter output.
6. On the MG3692x Synthesized Signal Generator #1, turn the RF On, and adjust the RF amplitude so that
–20 dBm appears at the splitter output (approximately +16 dBm).
7. Turn Off the RF of the MG3692x Synthesized Signal Generator #1.
8. 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).
9. Turn Off the RF of the MG3692x Synthesized Signal Generator #2.
10. On the S412E, press the Shift key and then the Mode (9) key. Use the rotary knob to highlight
Spectrum Analyzer and then press the Enter key to switch to Spectrum Analyzer mode.
11. Preset the S412E by pressing the Shift key, then the Preset (1) key, then the Preset button on the
touchscreen.
12. Touch the Amplitude submenu button and select the Detection submenu button and then the RMS/AVG
submenu button.
13. Set the S412E as follows:
Center Frequency: 800.151 MHz
Span: 100 Hz
RBW: 30 Hz
VBW: 1Hz
Reference Level: –15 dBm
Atten Lvl: 0dB
Preamp: Off
14. 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 as shown in Figure 3-4.
Note The 10 MHz External Reference is connected to the S412E.
Note Before continuing, allow a 30-minute warm up for the internal circuitry to stabilize.
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