Chapter 16
Performing RFoCPRI Testing
606
JD700B Series User’s Guide
Using marker
You can use the
MARKER
hard key to place a marker on a control channel and display the IQ diagram for
the selected channel.
Procedure
1
Press the
MARKER
hard key.
2
Press the
Channel
soft key to select a channel to be displayed in the IQ diagram.
The channel P-SS is selected by default.
3
Press the up/down arrow keys or turn the rotary knob to highlight a channel in the channel
summary table, and then press the center of the rotary knob.
4
Toggle the
Marker View
soft key between
On
and
Off
to display or hide the result of the selected
channel.
Measurement example
Figure 369 Control channel measurement with RFoCPRI LTE-FDD signal analyzer
NOTE
You can use the
LIMIT
hot key to analyze your measurements with the user-definable
limit and Pass/Fail indication. See “Setting limit for RFoCPRI signal analysis” on page
616 for more information.
Viewing decoded MIB and SIB1/2 information
In LTE system, the System Information (SI) that is carried over transport channel BCH or by DL-SCH
consists of two parts: static part called MIB (Master Information Block) and dynamic part called SIBs
(System Information Blocks). MIB contains important information such as system bandwidth, System Frame
Number (SFN), PHICH configuration while SIBs contain other useful information including transit power,
number of antenna, and SIB scheduling information for UE to read to access a cell.
JD700B series decodes MIB, the first of SIB (SIB1), and the second of SIB (SIB2) and provides you with
decoded information of several parameters. If you are not familiar with matching the system information
between IQ spectrum and RF spectrum, this feature enables you to identify the uplink carrier frequency and
bandwidth so that you can map AxC container to the RF carrier by combining the decoded information with
other system parameters obtained by RFoCPRI signal analysis. As not all LTE frames have transmitted SIB,
it may take time for the instrument to capture frames with the system information and decode MIB and