rBT2250

25G Burst Mode Bit Error Ratio Tester

rBT2250 is a Burst Mode Bit Error Ratio Tester to evaluate 10G/25G/50G OLT (Optical Line Terminal) receiver performance in burst mode. rBT2250 provides 2 independent pattern generator/error detector channels, and provide laser enable/ receiver reset /RSSI trigger signals and SD signal detect function. With built-in burst clock data recovery, clock would be recovered from the burst data every time, it is a must in long fiber testing. The high integration multi-channel design of rBT2250 make it the best choice for burst bit error ratio analysis.

  • Multirate – Burst rate: 24.8832/25.78125/49.7664/51.5625 Gbps
  • Sudden channel configuration – 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
  • 2 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;

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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.

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Pattern Generator Specifications Output Differential AC coupling, 100 Ω Termination
Single End AC coupling, 50 Ω termination
Output Amplitude 300-600 mVp-p Differential
Output Channel 2 in-depended Burst Channels Burst/Continuous mode
1 Continuous Channel
(25G NRZ/50G NRZ)
Continuous mode
Pattern PRBS7,23,31,User Defined,CID pattern
Support data rate 9.953/10.3125/12.4416/24.8832/25.78125 Gbps
Rise Time <20 ps 20%~80%
Jitter <1 ps RMS
Pre-emphasis Support Pre-Cursor & Post Cursor adjustment to minimize testing fixture or RF cable insertion loss
Pattern Sequence Each Channel can be set preamble/payload/guard-time pattern sequence in-dependently
CID code type Support add continuous “1”,continuous “0” pattern as length from 64-128 bits (adjustable)
connector type 2.92 mm female, 50 Ω
Clock/ Trigger and control channel Trigger output Support Frame Trigger output
Clock Output 1/2、1/4、1/8、1/16 divided clock output
Laser Enable Channel Support 2 laser enable control channel outputs( each enable control channel is synchronized with Pattern Generator channel)
Enable Output Level TTL level, support high/low enable and continuous High/Low
Reset Channel Support 2 reset channel outputs (reset channel is synchronized with error detector channel)
Reset Width Adjustable
Reset Position Adjustable, support Auto-Range to find the right reset position
RSSI Trigger out Support RSSI trigger (adjustable for RSSI trigger pulse width/repeat frequency and position)
Bit Error Detector Specifications Input type Differential/Single end
Data Rate 9.953/10.3125/12.4416/24.8832/25.78125 Gbps
Impedance 100 Ω
Input Amplitude Range 100~800 mVp-p
Sensitivity >100 mV
Clock Mode Internal burst clock data recovery unit
Synchronize Auto-synchronization and Auto-range
Connector 2.92 mm female, 50 Ω