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Chapter 16 Performing RFoCPRI Testing
JD700B Series User’s Guide
551
RAI: Remote Alarm Indication (any errors including LOS and LOF)
SDI: SAP Defect Indication (link not to be used for serivce access points)
Optic Rx Level: If the optical signal level is lower than the threshold, the CPRI link may not
work properly and the RRH may not be in service mode.
2
Optional . You can use the Save Logging Data soft key to record the event logging in
.csv
file
format. See “Using save” on page 35 for more information.
3
To clear the previous event history and start a new monitoring, press the MEASURE SETUP hot
key and then the Clear History soft key.
Measurement example
Figure 336 CPRI layer 2 monitoring
Performing layer 2 term testing
The out-of-service Layer 2 Term is to test CPRI fronthaul in the terminated state and it is used to monitor link
maintenance alarms of the physical layer (Layer 1) that is delivered on the L1 in-band protocol, which
resides on the layer 2 of CPRI. It also monitors the received optical power level.
In addition, CellAdvisor JD700B series can emulate the Base Band Unit (BBU) without C&M messages.
Once the RRH enters the operation state, JD700B series can generate an alarm or error and send it to the
RRH so that you can verify the optical cabling and proper RRH operation at the ground.
Connecting cables
In the terminate mode, you can perform the out-of-service testing. Before starting the test, you need to
connect cables with a tap or without a tap as illustrated in
Figure 337.
A SFP/SFP+ transceiver that is connected to your JD700B series must be compatible with your DUT and
you must have your module information such as line rate, wavelength, and mode (MM or SM) handy.