Anritsu SQA-R MP1900A Reference manual

Product Introduction
116-Gbit/s PAM4 BERT for 400GbE/800GbE
PAM4 ED MU196040B
Signal Quality Analyzer-R
MP1900A Series

2
Outline of 116-Gbit/s PAM4 Error Detector for 400GbE/800GbE
•High-performance BERT for 116-Gbit/s PAM4 error-free measurement
Simplify previously difficult PAM4 error troubleshooting
•Industry-best high input sensitivity of 36 mV [email protected] Gbaud
Support more accurate evaluations up to 116-Gbit/s PAM4.
•All-in-one 58-Gbaud PAM4 receiver test solution with built-in Clock
Recovery and Equalizer functions
Support faster testing and debugging with easy measurement system
configuration
•Wideband operation: 2.4 Gbaud to 64.2 Gbaud for NRZ
2.4 Gbaud to 58.2 Gbaud for PAM4
•Support CEI-112G-VSR Stressed Receiver Input Test
•Built-in 58-Gbaud PAM4 Clock Recovery
•PAM4 symbol Capture function
•Multichannel measurement (up to 4ch/unit)
Target Applications: 100/200/400/800GbE, CEI-112G-VSR

3
58-Gbaud PAM4 ED Specifications
PAM4 ED MU196040B
•Baud rate: 2.4 Gbaud to 58.2 Gbaud (PAM4)
2.4 Gbaud to 64.2 Gbaud (NRZ)
•Input amplitude (max.): 1.0 Vp-p (NRZ, PAM4)
•Input sensitivity (typ., Eye Height): 36 mV at 53.125G
23 mV at 26.5625G
•Built-in Clock Recovery (NRZ/PAM4):
2.4 to 29 Gbaud or 32.1 Gbaud
51 to 58.2 Gbaud (Extension option)
•Built-in Equalizer: DFE (1.4 dB) + Low-frequency Equalizer (2 dB)*
•Analog bandwidth: >40 GHz (nominal)
•SER measurement, logic error analysis using Diagnostics Mode
*Response at <1 GHz controlled by low-frequency Equalizer function

4
Best Level High-Sensitivity Input Performance
High sensitivity input of 36 mV (typical at 53.125 Gbaud) simplifies
previously difficult PAM4 error troubleshooting measurements.
PAM4 PPG
MU196020A
PAM4 ED
MU196040B
Error-Free at 53.125 Gbaud
Best level PAM4 sensitivity
Typ. 36 mV EH/Eye

5
All-in-One BERT w/ PAM4 Built-in Clock Recovery & Equalizer
Connections with external equipment and components are eliminated.
PAM4 Jitter Tolerance measurements are simplified by the easy system
configuration.
PAM4 PPG
MU196020A
PAM4 ED
MU196040B
w/built-in
CR&EQ
・Jitter
・ISI Control
DUT
・Built-in Clock Recovery to re-time DUT
signal for 58-Gbaud PAM4 JTOL testing
・Equalizer function to open Eye of VSR
stressed signal for measuring BER
Support PAM4
Jitter Tolerance test
Support BER measurement of
closed-Eye signal with stress

6
CEI-112G-VSR Stressed Input Test Support
The true DUT low-error-rate Rx performance can be tested with added stress.
Item Spec. (112G-VSR-PAM4)
Baud Rate
36 to
58 Gbaud
Channel
Loss
12 dB at 26.5625 GHz
EH6
>37 mV
EW6
>0.2 UI (>3.76 ps)
Target
BER
<E
-6
CEI-112G-VSR Rx input specification
Using MU196020A PPG output and ISI board
as calibrated signal (oscilloscope CTLE 2.5 dB
setting) supporting Rx Input standard
performance
PAM4 ED
MU196040B
Higher sensitivity performance
(E-8 or lower) than receiver
model defined by CEI VSR
standard (E-6)

7
Multichannel Measurement Support
・Use of two MP1900A units supports BER measurement for up to 4ch Tx and
4ch Rx, totaling 400 Gbit/s.
・The high module expandability helps cut future measuring equipment costs.
DUT

8
Built-in Equalizer
DUT Low-frequency Equalizer
ISI Stressed eye signal
MU196040B
Built-in Equalizer diagram
BER
Measur
ement
Combination of built-in Equalizer function and high input sensitivity
performance supports higher accuracy measurements.
Error-Free at 53.125 Gbaud
for inputting signals path
through 3 dB loss (typ.).
DFE
Decision feedback
Equalizer

9
FEC Symbol Capture Function (1/2)
High input sensitivity performance of 36 mV EH at 53 Gbaud plus FEC Symbol
Capture function for Pre-FEC jitter tolerance evaluation and analysis of FEC
uncorrectable errors
FEC Symbol Error detection for IEEE802.3-defined RS-FEC Codeword length and
FEC Symbol length standards
Input signal capture at timing exceeding settable FEC Symbol error threshold (1 to
32 per step), and Input Pattern Analysis function for causes of errors exceeding the
threshold
Jitter Stressed Signal
Capturing Detected FEC Symbols Errors
Test Board
SERDES/
Transceiver
MP1900A PAM4 BERT
RX
TX

10
FEC Symbol Capture Function (2/2)
Detect FEC Symbol Errors in Codeword.
The input data is captured when the number of FEC
symbol errors exceeds the threshold setting. The
causes of FEC-uncorrectable errors can be analyzed
from the captured data.
15 Errored FEC Symbols Detect!
Errored Codeword
544 FEC Symbols 544 FEC Symbols 544 FEC Symbols
1Errored FEC Symbol 2 Errored FEC Symbol
un-errored Codeword un-errored Codeword un-errored Codeword
1Errored FEC Symbol

11
Bathtub Jitter Analysis Function
The input signal jitter and phase margin can be measured automatically using the
Bathtub function.
The wideband and high-sensitivity PAM4 ED helps more accurate measurement of
DUT performance.
Example of PAM4 Signal Bathtub Measurement

12
PAM4 Test Patterns (1/2)
Supports PAM4 test patterns specified by 200 and 400 GbE standards
Supported Test Patterns
CEI
QPRBS13
-CEI, QPRBS31-CEI
IEEE
IEEE802.3bs/cd: PRBS13Q, PRBS31Q, SSPRQ, Square Wave
IEEE802.3bj: QPRBS13, JP03A, JP03B, Transmitter Linearity
RS
-FEC RS-FEC Scrambled Idle 50G 1 Lane (26.5625 Gbaud, 50GBASE-KR/CR/SR/FR/LR)
RS-FEC Scrambled Idle 100G 1 Lane (53.125 Gbaud, 100GBASE-DR)
RS-FEC Scrambled Idle 100G 2 Lanes 26.5625 Gbaud, 100GBASE-KR2/CR2/SR2)
RS-FEC Scrambled Idle 200G 4 Lanes (26.5625 Gbaud, 200GBASE-SR4/DR4/FR4/LR4)
RS-FEC Scrambled Idle 400G 4 Lanes (53.125 Gbaud, 400GBASE-DR4)
RS-FEC Scrambled Idle 400G 8 Lanes (26.5625 Gbaud, 400GBASE-FR8/LR8)
InfiniBand
PRBS13Q (InfiniBand), PRBS23Q, PRBS31Q(InfiniBand)
Fibre Channel
PRBS31Q (Fibre Channel)
General Purpose
PRBS7
, 9, 10, 11, 13, 15, 20, 23, 31, Data (User defined) 4 to 256 Msymbol
Edit Data pattern using PAM4 symbol 0, 1, 2, and 3 values.

13
• BER measurement for different pattern generation methods depending on DSPs
• Efficient detection of pattern generation circuit differences as well as logic errors,
such as inverted logic and bit skew
Pattern
Generation
Set bit skew between MSB and LSB
Gray Coding 1/(1+D) Mod4
Pre-Coding
MSB and LSB Inverted Logic
(before/after Gray Coding)
PAM4 Test Patterns (2/2)

14
Error Analysis Function (1/2)
Measurement of both symbol errors (MU196040B-041) and bit errors is useful for
specifying error causes by comparing both measurement results.
In addition, pressing [Details] offers more detailed analysis by confirming results for 12
types of errors.
PAM4 bit error measurement results
Separate error-rate measurements for MSB and LSB
Simultaneous measurement of 12 error
types

15
The Diagnostics Mode is useful for troubleshooting logic errors, such as inverted logic
and MSB/LSB bit skew, etc. When these types of logic errors prevent synchronization,
the cause can be determined using the separate MSB and LSB error results and the bit
skew result between MSB and LSB.
MSB/LSB bit skew detection
Separate MSB and LSB error results
Error Analysis Function (2/2)
[Diagnostics Mode] button

16
PAM4 Symbol Capture Function
Capture function supports identification of PAM4 error symbols and cuts
verification time.
Start capturing
inputting symbols
using Error detection,
Match pattern, or
External trigger.
Can specify error symbol position and
level change of captured signal

17
Measurement Result Logging Function
Periodic saving of BER/SER, etc., measurement results can evaluate
changes and stability of DUT time-dependent performance.
Sets measurement cycle and starts logging
Saves results to file
Measurement item selection
Times-periodically saved measurement results

18
Model Name Option Qty Remark
MP1900A Signal Quality Analyzer-R
-
1
MU181000B 12.5GHz 4port Synthesizer
-
1
MU181500B Jitter Modulation Source
-
1
For jitter injection
MU196020A PAM4 PPG
002,
011, 040, 042
1
MU196040B PAM4 ED
002,
011, 021, 023, 041
1
Model Name
MU196020A PAM4 PPG
MU196020A-001 32G baud
MU196020A-002 58G baud
MU196020A-003 64G baud
MU196020A-011 4Tap Emphasis
MU196020A-030 Data Delay
MU196020A-040 Adjustable ISI
MU196020A-042 FEC Pattern Generation
MU196020A-050
Intel-Module
Synchronization
Model Name
MU196040B PAM4 ED
MU196040B-001 32G baud
MU196040B-002
58G baud
(max. 64.2Gbit/s NRZ/58.2GbaudPAM4)
MU196040B-011 Equalizer
MU196040B-021
29G Clock Recovery
(2.4 to 29 Gbaud)
MU196040B-022
32G Clock Recovery
(2.4 to 32.1 Gbaud)
MU196040B-023
58G Clock Recovery
Extension (51 to 58 Gbaud)
MU196040B-041 SER Measurement
Options
Typical 58G PPG/ED Configuration

19
A p p e n d i x

20
MP1900A New PAM4 BERT Features
・All-in-one, high-reproducibility, easily configured test solution
・High-quality waveforms for more accurate measurement
・Easy, low-cost, future-proof expandability supporting high bit rates and multichannels