Table of Contents
Advertisement
JD780A Series Analyzers
can continue your measurement. The measurement settings can be saved and recalled as a file. You
can also use JDViewer, PC application software to configure a measure setup, save as a file, and load
the file on to the instrument.
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: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, or 20 MHz.
3.
To select the subframe number to be measured, complete the following steps:
a.
Press the Subframe 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.
Optional. Toggle the Cell ID soft key and select Auto or Manual as desired:
–
Auto: to let the instrument detect the Cell ID for the LTE signal automatically.
–
Manual: to set a specific Cell ID for the LTE signal manually in order to speed up the
synchronization with a BTS.
5.
Optional. To set the threshold for PDSCH, complete the following steps:
a.
Press the PDSCH Threshold soft key.
b.
Enter a value by using the numeric keys.
c.
Press the dB soft key.
6.
To set the time cursor at a specific position, complete the following steps:
a.
Toggle the Time Cursor soft key and select On.
b.
Turn the rotary knob to move the time cursor. You can also enter a value and then press the
Enter soft key.
NOTE
Enabling the time cursor puts the measurement on hold and you can make post-
processing analysis for each measurement over time using the time cursor.
7.
To start a new measurement, press the Reset/Restart soft key.
8.
Optional. Press the Miscellaneous soft key, and then do the following(s) 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 030 LTE-
Advanced FDD 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 select the cyclic prefix, toggle the Cyclic Prefix soft key and select Normal or
Extended. See "Appendix E – Cyclic prefix table" on page 575 for OFDM parameter details
by different bandwidth.
9.
Optional. Go to SAVE/LOAD > Save, and then select the save option from the choices available
for your measurement mode. See "Using save" on page 31 for more information.
250
Using LTE - FDD Signal Analyzer
Advertisement
Table of Contents
