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BERT

Bit error rate testers (BERTs) are usually the initial step for communications testing. These instruments generate digital test patterns, typically pseudorandom binary sequences (PRBSs), that drive devices under test (DUTs). Following the transmission of the signal through the link, the receiver in the BERT captures the signal. This setup can be used for multiple testing purposes, such as to evaluate the performance of a transmitter, a receiver, or an optical link.

MultiLane supports general-purpose BERTs that connect through fixtures and coax cables, as well as BERTs that present an MSA-compliant standard interface.

A BERT needs to be tailored to the characteristics of the DUT. Key parameters include:

  • Baud rate
  • Number of channels
  • Modulation format (e.g. NRZ, PAM4, etc.)
  • Test pattern (e.g. PRBS15 )
  • Signal amplitude
  • Port type (e.g. QSFP-DD)
  • Form factor (e.g. portable, chassis, etc.)
Part Number Max baud rate (GBd) Channels Pattern length Data format Amplitude max (mVpp diff.) Other

ML4039E-ATE

58

4

up to PRBS31, PRBS13Q, SSPRQ

PAM4/NRZ

800

ATE


ML4039-BTP

30

4

up to PRBS31

NRZ

800

Benchtop


ML4039-JIT-BTP

30

4

up to PRBS31

NRZ

2200+

Jitter Impairments, benchtop


ML4039B

1.25 - 29

4

up to PRBS(Q)31

PAM4/NRZ

800

benchtop


ML4039D

29.5

4

up to PRBS31Q

PAM4/NRZ

1500

benchtop


ML4039E

58

4

up to PRBS31, PRBS13Q, SSPRQ

PAM4/NRZ

800

benchtop


ML4039EN

58

4

up to PRBS31, PRBS13Q, SSPRQ

PAM4/NRZ

800

Benchtop, crosstalk noise injection


ML4079D

29.5

8

Up to PRBS 31, PRBS13Q, SSPRQ

PAM4/NRZ

1500

Benchtop


ML4079E

58

8

PRBS13Q, 31Q and SSPRQ

PAM4/NRZ

700

Benchtop


ML4079EN

58

8

PRBS13Q, 31Q and SSPRQ

PAM4/NRZ

1200

Benchtop, Random Noise and Jitter Injection


ML4079ELN

66

8

PRBS13Q, 31Q

PAM4/NRZ

800

Benchtop, Long Reach, Real HW FEC, PCle Gen 3-5-6-7, Low Rates, Ethernet Rates, Noise Injection

Part Number Max baud rate (GBd) Channels Pattern length Data format Amplitude max (mVpp diff.) Other

ML4070-SFP

30

3x1

PRBS 7, 9, 15, 23, 31

NRZ

800

SFP28 Compliance Tester, Stand Alone


ML4070-QSFP

30

3x1

PRBS 7, 9, 15, 23, 31

NRZ

800

QSFP28 Compliance Tester, Stand Alone

Part Number Max baud rate (GBd) Channels Pattern length Data format Amplitude max (mVpp diff.) Other

ML4054E

29

8

Up to PRBS58

PAM4/NRZ

1200

Manufacturing, benchtop


ML4054B

29

8

Up to PRBS31(Q)

PAM4/NRZ

800

Manufacturing, benchtop


ML4054B-LP

29

8

Up to PRBS31(Q)

PAM4/NRZ

800

Low profile version for thermal testing

Part Number Max baud rate (GBd) Channels Pattern length Data format Amplitude max (mVpp diff.) Other

ML407-PAM

56

1

Up to PRBS31(Q)

PAM4/NRZ

1000

PAM4 Jitter Generator, for use with any of the PAM4 BERTs such as ML4039D/E