Chapter 8
Using LTE-FDD Signal Analyzer
262
JD700B Series User’s Guide
Measurement example
Figure 145 Channel scanner measurement with LTE-FDD OTA signal analyzer
ID scanner
The LTE mobile receives signals from multiple base stations that all of these signals share the same
spectrum and are present at the same time. Each base station has unique scrambling code assigned to the
particular base station and it differentiates its signal from other base stations in the area.
The ID Scanner shows key parameters such as RSRP (Reference Signal Received Power) and RSRQ
(Reference Signal Received Quality) that predict the downlink coverage quickly.
◼
RSRPs from entire cells help to rank between the different cells as input for handover and cell
reselection decisions.
◼
RSRQ provides additional information when RSRP is not sufficient to make a reliable handover or
cell reselection decision.
All of the parameters for OTA ID scanner can be plotted on map data such as Google Maps and Google
Earth by using JDViewer.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 214,
you can continue your measurement.
Procedure
1
Press the
MEASURE SETUP
hot key.
2
To set the nominal channel bandwidth to be measured, complete the following steps:
Press the
Bandwidth
soft key.
Select the bandwidth option from the choices:
1.4 MHz
,
3 MHz
,
5 MHz
,
10 MHz
,
15 MHz
,
and
20 MHz
.
3
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-
