Chapter 8
Using LTE-FDD Signal Analyzer
268
JD700B Series User’s Guide
Press the
Subframe No
soft key.
Enter a value by using the numeric keys. You can also use the rotary knob.
Press the
Enter
soft key.
4
Optional
. Toggle the
Physical Cell ID
soft key and select
Auto
or
Manual
as desired:
Auto:
Lets the instrument detect the Physical Cell ID for the LTE signal automatically.
Manual:
Sets a specific Physical 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:
Press the
PDSCH Threshold
soft key.
Enter a value by using the numeric keys.
Press the
dB
soft key.
6
To set the time cursor at a specific position, complete the following steps:
Toggle the
Time Cursor
soft key and select
On
.
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 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 784 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 35 for more information.
Measurement example
Figure 149 Datagram measurement with LTE-FDD signal analyzer
