2-9 Third Order Intercept (TOI) Verification Spectrum Analyzer Verification
2-22 PN: 10580-00255 Rev. J MT8212E and MT8213E MM
19. Choose the larger of the two values from Step 16 and Step 18 and put this value into the following
equation as the “max” variable:
TOI = - 20 + [(- 20 - max) / 2] dBm
20. Record the Measured Max Value and Calculated TOI values into the test record using Table A-13,
“Third Order Intercept (TOI) Verification” on page A-12.
Procedure for 2400 MHz TOI
1. Connect the 10 MHz Reference from the frequency reference to the 10 MHz Referenc input connections of
the two MG3692x sythesizers and the MT821xE.
2. Zero/cal the MA2442D Power Sensor, and set the calibration factor of the sensor to 2400 MHz.
3. Connect the MA2442D Power Sensor to the input of the 1870A splitter.
4. Connect the 28 dB of Attenuation to each output side of the 1870A splitter.
5. Connect one MG3692x to one 28 dB attenuator and connect the other MG3692x to the other 28 dB
attenuator. (The normal RF output connections will become input connections, and the normal input
connection will become the RF oputput connection.
6. Set one MG3692x to 2399.951 MHz and set the other MG3692x to 2400.051 MHz.
7. Turn Off the RF Output of one MG3692x, and turn On the other RF Output. Set the level of the MG3692x
that is On so that the MA2442D sensor reads –20 dBm.
8. Turn Off the MG3692x that is On, and turn On the MG3692x that is Off. Set the level so that the
MA2442D reads –20 dBm.
9. Disconnect the MA2442D from the splitter, and connect the splitter to the MT821xE RF In port using the
34NN50A adapter.
10. Turn On the RF Output of the Synthensizer that is Off, so that both MG3692x Synthesizers are On.
11. Press the On/Off key to turn On the MT821xE Cell Master.
12. Put MT821xE into Spectrum Analyzer mode and Preset the instrument.
13. Using the Frequency menu, set the Center Frequency to 2399.851 MHz, and set the Span to 100 Hz.
14. Using the BW menu, set the RBW to 10 Hz and VBW to 1Hz.
15. Using the Amplitude menu, set the Reference Level to –15 dBm, ensure that the Pre Amp is Off, set
Attenuation Level to 10 dB, press the Detection submenu key, and press RMS/Avg.
16. Using the Marker menu, press Peak Search and write down the level value.
17. Using the Frequency menu, set the Center Frequency to 2400.151 MHz.
18. Using the Marker menu, press Peak Search and write down the level value.
19. Choose the larger of the two values from Step 16 anad Step 18, and put this value into the following
equation as the “max” variable.
TOI = -20 + [(-20 - max) / 2] dBm
20. Record the Measured Max Value and Calculated TOI value into the test record using Table A-13,
“Third Order Intercept (TOI) Verification” on page A-12.
Caution Before continuing, allow a 30 minute warm-up period for the internal circuitry to stabilize.
To Next Page
Loading...
