Intel Cyclone 10 GX User Manual page 289

5. Cyclone 10 GX Transceiver PHY Architecture
UG-20070 | 2018.09.24
PRBS test patterns may be considered equivalent to "noise". Use these patterns to
test the transceiver link with a noisy signal by placing the transceiver in loopback
mode.
Use PRBS7 and PRBS9 to test transceiver links with linear impairments, and with 8B/
10B.
Use PRBS15 for jitter evaluation.
Use PRBS23 or PRBS31 for jitter evaluation (data-dependent jitter) of non-8B/10B
links, such as SDH/SONET/OTN jitter testers. Most 40G, 100G, and 10G applications
use PRBS31 for link evaluation.
Figure 184. PRBS Generator for Serial Implementation of PRBS9 Pattern
PRBS Output
Note: All supported PRBS generators are similar to the PRBS9 generator.
Refer to the Reconfiguration Interface and Dynamic Reconfiguration chapter for
configuration details.
Related Information
Reconfiguration Interface and Dynamic Reconfiguration
5.2.1.5.2. Pseudo-Random Pattern Generator
The pseudo-random pattern (PRP) generator is specifically designed for the 10GBASE-
R and 1588 protocols. The PRP generator block operates in conjunction with the
scrambler to generate pseudo-random patterns for the TX and RX tests in the 10G
Ethernet mode. You can use the Cyclone 10 GX Pseudo Random Pattern (PRP)
generator in the scrambler to generate random data pattern and seed that the
scrambler can use. The PRP mode is a test mode of the scrambler. Two seeds are
available to seed the scrambler: all 0s or two local fault-ordered sets. The seed will be
used in the scrambler to produce the pattern. PRP is only available when the
scrambler is enabled.
Refer to the Reconfiguration Interface and Dynamic Reconfiguration chapter for
configuration details.
Related Information
Reconfiguration Interface and Dynamic Reconfiguration
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