3-8 Option 883, TD-LTE Signal Analyzer Verification Chapter 3 — Options Verification
3-32 PN: 10580-00342 Rev. D MS2720T MM
20. Press the Setup main menu key and set the BW to 20 MHz. Then repeat Step 5 Substep a through
Step 19 by using the TDLTE-E-TM-1-1_20M pattern for Step 5 Substep i.
TD-LTE Frequency Error Tests
The tests in this section verify the function of the optional LTE Signal Analyzer in Model MS2720T
Spectrum Master.
Procedure
1. Connect the Power Sensor to the power meter and zero the sensor.
2. Set the Power Meter Measurement MODE to True RMS, set Averaging MODE to Moving, and set
Averaging NUMBER to 256.
3. Set the calibration factor frequency of the power sensor to 750 MHz.
4. Connect the Power Sensor, 1870A splitter, 6 dB attenuators (quantity 2), as shown in Figure 3-10.
5. Set the MG3700A as follows:
a. Press the yellow Preset button (answer yes to the question).
b. Press the Set key. Note: Both Set keys on the MG3700A perform the same function.
c. Press the (F1) submenu key to select “Load File to Memory”.
d. Press the (F1) submenu key again to select “Select Package”.
e. Using the Down Arrow key, step through the selection list until LTE_TDD is highlighted.
f. Press the Set key.
g. Press the (F6) submenu key “Return”.
h. Press the Set key. The “Select Package” list box is displayed. Again select LTE_TDD and Set.
i. Another file list is displayed. Select (highlight) TDLTE-E-TM-3-3_10M.
j. Press the Set key.
k. Press the MOD On/Off key and verify that the LED is On. Ensure that the “Playing” indicator is
displaying the moving pattern.
l. Press the Frequency key, then enter 750 MHz.
m. Press the
Level key, then enter 2dBm.
n. Turn on the output.
6. Adjust the MG3700A Level setting with the knob so that the power meter reads –12.0 dBm ± 0.5 dB.
7. Set the MS2720T to TD-LTE Signal Analyzer mode and Preset the instrument.
8. Set the MS2720T as follows:
a. Press the Freq main menu key and set the Center Freq to 750 MHz.
b. Press the Measurements main menu key and select Modulation.
c. Press the Constellation submenu key.
9. Record the MS2720T Frequency Error reading into the section
“750 MHz, –12 dBm” in Table A-94, “Demodulation, TD-LTE Frequency Accuracy” on page A-48.
10. Verify that the values are within specification.
11. Adjust the MG3700A Level setting to approximately –15 dBm so that the power meter reads
–30.0 dBm ± 0.5 dB.
Note The TD-LTE pattern requires a Waveform Data license MX370110A that must be purchased.
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