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Burst Error Ratio Tester


50G Burst Mode Bit Error Ratio Tester

Semight Instruments 50G Burst Mode Bit Error Ratio Tester rBT3250 is specifically designed for testing new burst error code analyzers for optical line terminals (OLTs) in next-generation 25G/50G passive optical network (PON) applications, used to evaluate the performance of 25G or 50G OLT receivers in burst mode.


  • Multirate

    Burst rate: 24.8832/25.78125/49.7664/51.5625 Gbps
  • The burst channel is fully configured

    Integrated 2 independent high-speed burst data channels,
    Support 2 burst timing configurable code pattern generator channels and 2 burst error test channels
  • Support LOS measurement

    Separate LOS monitoring/SD monitoring/LOS judgment for each channel
  • Built-in clock recovery

    It can work in the real long fiber environment to avoid the influence of long fiber on time delay and jitter
  • Two synchronous ONU laser enable control channels

    The control level is LVTTL3.3V without the need for external level conversion
  • Supports two dual reset control channels

    The reset position and reset width can be adjusted

Features and Benefits

  • Support Combo PON for burst testing

    Dual reset signals, adjustable reset position, Combo pon requires 2 reset signals;
  • Dual package testing

    Each data packet has different attenuation, there is a phase jump between different data packets, and there are long connections of "1" and "0" in the data packets,
    Need to simulate the generation of the worst 2 ONU signals;
  • Built-in clock recovery, support for long fiber testing

    The built-in clock recovery allows rBT3250 to operate in a real long fiber working environment, which is basically impossible to achieve in other commonly used solutions in the industry, because those systems do not support clock recovery and cannot adapt to the impact of long fibers on latency and jitter.

Code type occurrence indicators




Communication coupling, 100 Ω terminal matching

Single ended

AC coupling, 50 Ω terminal matching

Output amplitude



Output channel

Two independent burst data channels

Support for burst or continuous mode

2-way continuous channel (50Gbps NRZ/25Gbaud PAM4)

Supports continuous mode

Supporting code types

Support: PRBS7, 15, 23, 31, SSPR, user-defined code types, and CID code types

Support rate

24.8832Gbps, 25.78125Gbps, 49.7664Gbps, 51.5625Gbps

Rising time

< 12ps



< 0.9ps


Pre emphasis

Support pre emphasis adjustment to improve the impact of testing cable testing fixtures on signal quality

Code type sequence

Each channel supports the generation and editing of preamble, protection time, and load timing signals

CID; Code type

Supports continuous "1" and "0" code types, with a length of 64-128; Bits (adjustable)

Connector type

2.4mm; Female, 50 Ω

Clock output

1/2, 1/4, 1/8, 1/16 division clock output

Laser Enable

Provide 2 sets of laser enable signal outputs (synchronized with corresponding code generator channels)

Enable output level

TTL level, supports high/low enable and continuous high/low

Reset signal output

Provide 2 sets of reset signal outputs (synchronized with corresponding error code receiver channels)

Reset signal width


Reset signal position

Adjustable, supports automatic ranging

RSSI; Trigger output

Supports RSSI trigger signal pulse width, repetition period, and adjustable position

ErrorCode detector indicators

Input type

Differential input

Data rate

24.8832Gbps, 25.78125Gbps, 49.7664Gbps, 51.5625Gbps


100 Ω




> 100mV

Clock mode

Built-in clock recovery


Automatic synchronization and distance measurement


2.4mm female,50Ω

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