JDS Uniphase CellAdvisor JD780A Series, User Manual

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JD780A Series Analyzers
Using LTE - FDD Signal Analyzer
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a. Press the Subframe No soft key.
b. Enter a value by using the numeric keys. You can also use the rotary knob.
NOTE
For MBMS testing, this subframe number must be neither 0 nor 5 as these subframes 0
and 5 are not available for MBMS and it must be set to the MBMS transmitted channel
’s
subframe number.
c. Press the Enter soft key.
4.
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.
5.
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.
6.
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 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 030 LTE-Advanced FDD is not
installed or if the MIMO is set to 2x2, the antenna ports 2 and 3 are disabled.
–
To turn the Multimedia Broadcast Multicast Service (MBMS) feature on or off, toggle the
MBMS soft key and select On or Off . For proper MBMS testing, you need to set the
Subframe No with the same PMCH subframe number. If this setting is on, either PMCH or
PDSCH appears on the screen depending on the detected channel.
–
To set the Multicast Broadcast Single Frequency Network (MBSFN) detection automatically
or manually for MBMS testing, toggle the
MBSFN soft key and select Auto or Manual . An
automatically detected or manually entered MBSFN ID appears on the screen.
–
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.
Setting display
You can use the TRACE/DISPLAY hard key to change the display mode to PDSCH, PMCH, or both.
Procedure
1.
Press the TRACE/DISPLAY hard key.
2.
Press the Display Channel soft key.
3.
Select the display mode from the choice: PDSCH , PMCH , and Both .