Chapter 16
Performing RFoCPRI Testing
JD700B Series User’s Guide
549
2
Select
RFoFiber > RFoCPRI
. The Layer 2 Monitoring mode is set by default.
3
Press the
MEASURE
hot key, and then select the measurement mode as desired:
Layer 2 Monitoring
Layer 2 Term
or
Layer 2 BERT
(only with RFoCPRI Channelized BERT license)
Interference Analyzer > Spectrum
,
Spectrogram
,
RSSI
,
Spectrum Replayer
,
Dual Spectrum
,
Dual Spectrogram
, or
Quad spectrum
PIM Detection > PIM Detection Single Carrier
,
PIM Detection Multiple Carriers
, or
Calculated PIM
Signal Analyzer > LTE-FDD > Spectrum
,
RF Analysis
,
P vs T (Frame)
,
Modulation Analysis
, or
Power Statistics CCDF
Signal Analyzer > LTE-TDD > Spectrum
,
RF Analysis
,
P vs T (Frame)
,
Modulation Analysis
, or
Power Statistics CCDF
Performing layer 2 monitoring
The in-service Layer 2 Monitoring 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 verifies proper
optical power level of the received signal.
Connecting cables
The monitoring mode lets you perform in-service testing by using coupler(s) or nTap(s). You can connect
cables with a tap or without a tap as illustrated in Figure 335. If you have connected cables directly from
RRH and BBU without using the nTap, you must turn on the through mode (Thru) in the CPRI parameter
settings.
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.
Figure 335 Connection diagram for Layer-2 monitoring mode
With nTap (both Thru On/Off):
Without nTap (Thru On only):
Selecting measurement mode
Procedure
1
Press the
MEASURE
hot key.
2
Select
Layer 2 Monitoring
.