Chapter 8
Using LTE-FDD Signal Analyzer
256
JD700B Series User’s Guide
GHz.
Set the following parameters as needed:
Center Frequency
,
Channel Number
,
Bandwidth
,
Physical
Cell ID
,
CFI
,
PHICH Ng
,
Antenna Port
,
MBMS On/Off
,
Cyclic Prefix
, and
PDSCH Modulation Type
NOTE
You can set
PSS/SSS EVM
Threshold value by entering
Misc
menu only if
MA
is
selected in
TRACE/DISPLAY
.
To set more component carriers, repeat the steps
c-g
.
3
Press the
MEASURE SETUP
hot key again
4
Toggle the
EVM Detection Mode
soft key and select
Single
or
Combine
as desired:
Single:
Testing on one single antenna connected to your JD700B series with a cable.
Combine:
Testing on multiple antennas connected to your JD700B series with a 2x1 or 4x1
combiner or an antenna.
5
To select the subframe number to be measured, do one of the following:
If the
EVM Detection Mode
is set to
Single
, press the
Subframe No
soft key and then set
the subframe number.
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.
If the
EVM Detection Mode
is set to
Combine
, toggle the
Subframe No
soft key, and then
select
0
or
5
.
6
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.
7
Toggle the
PDSCH Precoding
soft key between
On
and
Off
to enable or disable the PDSCH
precoding.
8
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.