3-7 Option 883, LTE Signal Analyzer Verification Chapter 3 — Options Verification
3-26 PN: 10580-00342 Rev. D MS2720T MM
LTE Channel Power Accuracy Tests
The tests in this section verify the function of the optional LTE Signal Analyzer in Model MS2720T.
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, 10 dB attenuators (quantity 2), as shown in Figure 3-9.
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_DL_E-TM is highlighted.
f. Press the Set key.
g. Press the (F6) submenu key “Return”
h. Press the Set key. The “Select Package” list box will appear. Again select LTE_DL_E-TM and then
the Set key.
i. Another file list will appear. Select (highlight) E-TM_3-1_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 the output on.
6. Adjust the MG3700A Level setting with the knob so that the power meter reads –15.0 dBm ± 0.5 dB.
7.
Set the MS2720T to 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 RF, then select Channel Spectrum.
9. Record the MS2720T Channel Power reading into the column labeled “Measured Channel Power”
(row labeled 750 MHz, –15 dBm) in Table A-91, “RF Measurements, LTE Channel Power Accuracy”
on page A-45.
10. Calculate the Channel Power Error by subtracting the MS2720T “Channel Power” reading from the
power meter reading in Step 6. Record the result into the test record in the column labeled “Error”
(row labeled 750 MHz, –15 dBm) in Table A-91.
11. Verify that the error is within specification.
12. Adjust the MG3700A Level setting to approximately –33 dBm so that the power meter reads
–50.0 dBm ± 0.5 dB.
Note The LTE pattern requires a Waveform Data license MX370108A that must be purchased.
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