Protocol Settings
R&S
®
EX-IQ-BOX
193
User Manual 1409.5570.32 ─ 05
Simulate an error:
1. Configure different AxC positions in uplink and downlink while in loopback mode.
2. In the uplink tab, you can see that the error rate is increasing steadily.
This shows that the box detects the shift between the signals, and can thus detect
the errors in real-world signals from the DUT and vice versa.
Rx Received Bits
Indicates the total number of received words. Low Level BER Test consecutively counts
the number of received words in order to compare them with the sent data and to deter-
mine the error rate.
Remote command:
Rx BER
Displays the number of bit errors. This function consecutively counts the number of dis-
crepancies that occur during the test. The BER result is the ratio, which is calculated by
dividing the number of error bits by the total number of bits.
Remote command:
Reset
Restarts the PRBS test.
Performing a reset is recommended after changes of CPRI link parameters or external
connections, to start from a defined initial state.
Remote command:
7.2.10 Control & Management
The
Control & Management
(C&M) tab comprises all settings related to the process of
exchanging control information between RE (
R
adio
E
quipment) and REC (
R
adio
E
quip-
ment
C
ontrol) in base station systems. CPRI supports two different protocols for C&M
data, the slower variation HDLC (
H
igh-Level
D
ata
L
ink
C
ontrol) and the fast Ethernet.
7.2.10.1
Slow C&M (HDLC)
The
HDLC Settings
section comprises the necessary parameters for activating HDLC
control and management data protocol.
In chapter
chapter 4.5, "Connecting the R&S EX-IQ-BOX"
mation on how to connect the interface. For more information on the hardware, see the
data sheet of the R&S
EX-IQ-BOX, option R&S EXBOX-B85 (CPRI breakout board).
CPRI
Summary of Contents for EX-IQ-BOX
Page 147: ...Protocol Settings R S EX IQ BOX 132 User Manual 1409 5570 32 05 CPRI...
Page 391: ......
