JDS Uniphase CellAdvisor JD780A Series, Руководство пользователя

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JD780A Series Analyzers
Using LTE
– TDD Signal Analyzer
287
Setting measure setup
After configuring test parameters as described in the
“Configuring test parameters” on page 265, you
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.
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.
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 . Toggle the CFI soft key and select Auto or Manual as desired:
–
Auto : to let the instrument set the number of OFDM symbols used for transmitting PDCCHs
in a subframe.
–
Manual : to set the number of OFDM symbols manually. The set of OFDM symbols that can
be used for PDCCH in a subframe is given by 0 , 2 , 3 or 4 in 1.4 MHz bandwidth and 1 , 2 , or
3 in other bandwidths.
6.
Optional . Press the PHICH Ng soft key, and then select the option for the number of PHICH
groups (Ng): 1/6 , 1/2 , 1, 2 , E-1/6 , E-1/2 , E-1 , or E-2 .
7.
Toggle the Event Hold soft key between On and Off to enable or disable the event hold feature.
When enabled, the display line for the PDSCH threshold appears.
When an event occurs, the measurement is put on hold until you press the
HOLD hot key.
NOTE
You can view detailed current resource block on the I-Q diagram, particularly in a
dynamic field environment.
8.
Press the More (1/2) > Uplink-Downlink Configuration soft key, and then select the number of
uplink/downlink between one and six.
9.
Optional . Press the More (1/2) > 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 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