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Multi-ACLR
Spurious emissions
4
Optional. You can enable alarm sound that goes off if the measurement falls outside of the limit.
Toggle the Beep soft key between On and Off to enable or disable the beep sound.
5
Optional. Go to SAVE/LOAD > Save, and then select Limit to save the limit settings.
See "Using save" on page 32 for more information.
Conducting power vs. time measurements
The Power vs. Time measurement measures the modulation envelope in the time domain, showing the
signal rise and fall shape of LTE signal and the power of each time slot in an LTE signal.
Power vs. time (slot)
The Power vs. Time (Slot) in LTE - TDD Signal Analyzer measures the modulation envelope in the
time domain, showing the signal rise and fall shapes of LTE signal.
NOTE
In this measurement, desirable level of the input power is lower than -10 dBm. If the input
power to be measured is -10 dBm or higher, it is highly recommended that you use an
external attenuator.
Setting measure setup
After configuring test parameters as described in the "Configuring test parameters" on page 234, you
can continue your measurement. The measurement settings can be saved and recalled as a file.
Procedure
1
Press the MEASURE SETUP hot key.
2
To set the nominal channel bandwidth to be measured, complete the following steps:
a
Press the Bandwidth soft key.
b
Select the bandwidth option from the choices: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz,
and 20 MHz.
3
To select the slot number to be measured, complete the following steps:
a
Press the Slot No soft key.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
c
Press the Enter soft key.
4
Toggle the Cell ID soft key and select Auto or Manual as desired:
–
Auto: Lets the instrument detect the Cell ID for the LTE signal automatically.
–
Manual: Sets a specific Cell ID for the LTE signal manually in order to speed up the
synchronization with a BTS.
5
Optional. Press the Miscellaneous soft key, and then do the following as needed:
–
To select the number of antenna ports, toggle the MIMO soft key and select 2x2 or 4x4. This
MIMO (Multiple Input Multiple Output) setting is activated only if the option 031 LTE-
Advanced TDD is installed with a license number. If not, the instrument sets this option to
2x2 by default. A 2x1 or 4x1 RF combiner is also required to able to test on MIMO channels.
–
To assign a antenna port number automatically or manually, press the Antenna Port soft
key and select the option: Auto, 0, 1, 2, and 3. If the option 031 LTE-Advanced TDD is not
Multi-ACLR
Spurious Emissions
JD700B Series User's Guide
Chapter 9 Using LTE - TDD Signal Analyzer
(On/Off only)
(On/Off only)
249
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