Anritsu MP1900A Series User manual

MP1900A 32 Gbaud PAM4 Solution
Signal Quality Analyzer-R
MP1900A Series
Quick Start Guide

2
Outline
The Signal Quality Analyzer-R MP1900A series features a high-
expandability design with real-time BER measurement using a PAM4
Convert/Decode function, plus sequential PAM4 BER measurements
using an error detector for more efficient inspection of 400GbE
transceivers and devices.
This Quick Start Guide explains use of the MP1900A series to generate
PAM4 signals up to 32 Gbaud, real-time BER measurement using the
32 Gbaud PAM4 Decoder with CTLE G0376A, and sequential PAM4 BER
measurement using the 21G/32Gbit/s SI ED MU195040A.

3
G0375A/G0376A Real-time BER Measurement

4
Outline of G0375A/G0376A 32 Gbaud PAM4 BER Solution
32 Gbaud Power PAM4 Converter
G0375A
32 Gbaud PAM4 Decoder with CTLE
G0376A
DUT
•3.9 Vp-p (differential) PAM4
output
•10Tap Emphasis
•Clean Eye/Low Jitter
•Tr/Tf 14 ps (typ.)
(PAM4 output)
•CTLE 14 GHz, 12 dB
•Clock recovery
(by MU195040A ED)
•High input sensitivity of
40 mV(EH)
•True PAM4 BER
measurement
Supports PAM4 BER Measurements of PRBS31Q Pattern
Loss CH
MP1900A
•Small remote head for
close-in approach to
DUT
•Multi-channel
•Excellent expandability
and PAM4/NRZ support

5
Setup with G0375A and G0376A for PRBS31Q Error Free
32Gbaud Power PAM4 Converter
G0375A
32Gbaud PAM4 Decoder with CTLE
G0376A
32G 2ch SI PPG
MU195020A
(Opt-020, 021, 031)
32G 2ch SI ED
MU195040A
(Opt-020, 022)
CTLE Input
Decoder Input
Signal Quality Analyzer-R
MP1900A
J1741A cable x4
(80 cm, skew <1 ps)
J1728A cable x2 (40 cm, skew <1 ps)
J1728A cable x2 (40 cm, skew <1 ps)
(*1) Cable x2 (skew <1 ps)
(*1) J1728A or lower loss cable
Synthesizer
MU181000B
Jitter Modulation
MU181500B
DUT
J1439A
80 cm, K cable
41KC-6 x4

6
32 Gbaud PAM4 BER Measurement Item List
Model Name Option Qty Remark
G0375A
32Gbaud
Power PAM4 Converter
-
1
G0376A
32Gbaud
PAM4 Decoder with CTLE
-
1
MP1900A
Signal
Quality Analyzer-R
-
1
MU181000B
12.5GHz 4port Synthesizer
-
1
MU181500B
Jitter
Modulation Source
-
1
For
Jitter injection
MU195020A
21G/32G bit/s SI PPG
001,
020, 021,
031
1
MU195040A
21G/32G bit/s SI ED
001,
020, 022
1
41KC
-6
Fixed
Attenuator 6 dB
4
J1439A
Coaxial
Cable (0.8m, K connector)
1
J1728A
Electrical
Length Specified Coaxial
Cable
(0.4m, K connector)
-
(2)
Cable for waveform
monitoring
MX183000A
PAM
Control
PAM
4 Control
1
Standard
software
MX183000A
-
PL001
Jitter
Tolerance Test
1
For
Jitter Tolerance
Test

7
Specifications Tx
G0375A 32Gbaud Power PAM4 Converter + MU195020A 21G/32G bit/s SI PPG
Item Specification Remarks
Number
of Outputs
2
(Data, xData)
AC coupling
Baud Rate
10
to 32.1 Gbaud
Output
Amplitude
0.3 to 1.95
Vp-p (Single-end, typ.)
Data1 input 0.2 to 1.3 Vp
-p and
Data2 input 0.1 to 0.65 Vp
-p
Random Jitter (rms)
200 fs (typ.)
Tr/Tf (20% to 80%)
14 ps (typ.)
Using MU195020A
SI-PPG
Eye Linearity
(RLM)
0.6 to 1 adjustable from level ratio
Number
of Inputs
4 (Data1, xData1, Data2, xData2)
Uses Data3
and J1735A (two for
differential)
at 3 Eye independent
level control
Maximum Input
Amplitude
1.5 Vp
-p (Data1, xData1)
0.75 Vp
-p (Data2, xData2)
In/Out
Connector
K
(female)

8
Specifications Rx
Item Specification Remarks
Decoder
Number of Inputs 2 (Data, xData)
1 (External clock)
K Connector (female)
Baud Rate 10 to 32.1 Gbaud (DFF ON mode)
10 to 28.1 Gbaud (DFF OFF mode)
Uses MU19040A with external clock
Uses CDR of MU195040A-022
Data Input Amplitude 0.4 Vp-p (typ.)
0.5 Vp-p (max.)
Single-ended
Data Input Sensitivity 40 mV (typ.) 28 Gbaud, Per Eye, Eye Height, Single-
ended at E-6
Clock Input Frequency 10 to 32.1 GHz (DFF ON mode) Full-rate clock
Clock Input Amplitude 0.3 to 1.0 Vp-p External Clock Input
Number of Outputs 3 (Data1, Data2, Monitor Data) K Connector (female)
Data Output level 0/–0.3 V (typ.)
Internal DFF Selectable ON/OFF Uses external Clock for D-FF ON mode
CTLE
Number of Inputs 2 (Data, xData) K Connector (female)
Input Amplitude 0.4 V (max.)
CTLE Gain –12 to 0 dB adjustable
CTLE Peak Frequency 14 GHz (typ.)
Number of Outputs 2 (Data, xData) K Connector (female)
G0376A 32Gbaud PAM4 Decoder with CTLE + MU195040A 21G/32G bit/s SI ED

9
Equipment setup(1/2)
Select PAM4 Control from Application Selector of
MX183000A software, and click Start.
Click Search Start. The software
searches for equipment, and
displays the equipment currently
connected in the connected
equipment display area.

10
Equipment setup(2/2)
- Select Jitter, PPG, and ED with unit number from each selection list.
- Select G0375A and G0376A COM port with USB
*Select “None” when Jitter, PPG or ED isn’t used for testing.
- Set External Att value to 6 dB when 6 dB attenuator is used between PPG and
G0375A. (6 dB attenuator is recommended for evaluating SNDR or SNR_ISI.)

11
[Use Noise Generator] on MX183000A PAM4 Control
To use the Noise Generator MU195050A, put a check mark in the [Use Noise
Generator] check box at the Equipment Setup tab.

12
Setup for PRBS31Q Error Free (with MU195050A)
32Gbaud Power PAM4 Converter
G0375A
32Gbaud PAM4 Decoder with CTLE
G0376A
Noise
Generator
MU195050A
32G 2ch SI PPG
MU195020A
(Opt-020, 021, 031)
32G 2ch SI ED
MU195040A
(Opt-020, 022)
Decoder Input
Signal Quality Analyzer-R
MP1900A
J1741A cable x4
(80 cm, skew <1 ps)
J1728A cable x2 (40 cm, skew <1 ps)
J1728A cable x2 (40 cm, skew <1 ps)
(*1) Cable x2 (skew <1 ps)
(*1) J1728A or lower loss cable
Synthesizer
MU181000B
Jitter Modulation
MU181500B
DUT
41KC-6 x4
J1439A
80 cm, K cable

13
Set Total Amplitude and Select a test pattern for
the measurement.
Set Output to ON.
Total amplitude and pattern setting

14
PAM4 Skew Adjustment between MSB and LSB
Adjust skew between Data1 and Data2 at [Eye Skew] while observing the G0375A output waveform with
an oscilloscope to align the skew between MSB and LSB of PAM4.
- Set Data 1 Output to ON and Data 2 Output to OFF and set a delay marker at the crosspoint position on
the oscilloscope screen.
- Set Data 2 Output to ON and Data 1 Output to OFF. Adjust the Data 2 skew value so the crosspoint
position aligns with the marker. Set the Data 1 Output to ON after finishing adjustment.
- Uncheck [Eye Skew] to close the skew setting window.

15
Emphasis Settings
Setting a checkmark in the [Tracking] checkbox of Emphasis Setting and clicking [Middle]
performs Emphasis setting for Data1 (MSB). In addition, setting a checkmark in [Tracking]
also sets the same value automatically at Data2 (LSB). Pressing [Return to MX183000A] after
setting Emphasis returns to the MX183000A PAM4 Control screen.
Data1 Emphasis Setting Screen

16
G0375A with MU195020A PPG PAM4 Typical Waveforms
28 Gbaud, 0.9 Vp-p (Single-end)
Using oscilloscope with 70 GHz bandwidth and
residual jitter of less than 200 fs rms.

17
BER Measurement Procedure
1. Start MX183000A PAM4 Control
2. Adjust G0375A amplitude, Emphasis, skew, and pattern by referring to the previous
slides. Pattern setting sets the same pattern for both Tx and Rx.
3. [For loopback performance check] connect the G0375A output directly to G0376A
decoder input.
4. Ensure [DFF] is set to ON.
5. Ensure [Input Condition]
is set to Differential when
the input condition is
differential.
6. Put a check mark in the
[DFF Auto Search] check
box.
7. Click [Start PAM4 Auto
Search].
8. Click [BER Result] to
display measurement
results.

18
Typical Settings and BER Result
Recommended settings for error free condition at 26.5625 Gbaud and
28 Gbaud and loopback connection from G0375A to G0376A decoder input
are listed below.
MU195020A+G0375A
Tx
configuration
MU195020A+
MU195050A
+G0375A
Tx
configuration
G0375A
output
amplitude
400 mV (Single-end)
800 mV(Differential)
Pattern
PRBS31Q
Skew adjustment
100 mUI or less
Emphasis Pre
-cursor1
0.0
dB at 26.5625 G/
0.8 dB
at 28 G
1.0 dB
at 26.5625 G/
1.8 dB at 28 G
Emphasis Post cursor1
0.0
dB at 26.5625 G/
0.2 dB
at 28 G
0.8 dB
at 26.5625 G/
1.0 dB at 28 G
G0376A
DFF On/Off DFF On
G0376A
Input Condition Differential
Error Result
Error Free at 26.5625 G and 28 G

19
MU195040A Error Detector PAM4 Sequential
BER Measurement

20
Setup with G0375A and MU195040A ED for jitter tolerance test
32Gbaud Power PAM4 Converter
G0375A
Noise Generator
MU195050A
32G 2ch SI PPG
MU195020A
(Opt-020, 021, 031)
DUT
Signal Quality Analyzer-R
MP1900A
J1741A cable x4
(80 cm, skew <1 ps)
J1728A cable x2 (40 cm, skew <1 ps)
Synthesizer
MU181000B
Jitter Modulation
MU181500B
J1728A cable x2 (40 cm, skew <1 ps) XData
Data
41KC-6 x4
Note:
Connect xData output to xData1 input of ED for Clock Recovery.
Connect Data output to Data2 input of ED for sequential measurement.
Supports PAM4 Jitter tolerance test using MU195040A PAM4 sequential
measurement
32G 2ch SI ED
MU195040A
(Opt-020, 022)