


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;


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.

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 |