Products
SFF-8431 SFP+ Electrical/Optical Compliance System for Module, Host Card and IC Testing Applications.
Over the past 5 years, the trend in optical communications has seen a migration to hot pluggable transceiver modules. These modules are self-contained transmitters and receivers that offer significant advantages over discrete optics. These advantages (smaller footprints, added functionality and control firmware) have resulted in an increase in the number of ports per line card and a reduction in cost per port.
Although initially, the trend was to put a lot of functionality (i.e. electronics) inside the modules, newer MSA (Multi Source Agreement) standards have moved this functionality back to the line card. The latest MSA standard, SFP+, uses new equalizer technology to move even more of this functionality back to the line card.
With earlier pluggable module standards (such as the X2 and XFP form factors) the conversion between the analogue optical signals and the digital electronic signals was handled by either a SerDes or a CDR within the module. This resulted in the optical performance of the system (i.e. receiver sensitivity and laser eye quality) being totally dependent on the design of the module (and not on the host card) as the electrical signals entering and exiting the module on the host side were both digital.
The lack of electronics to complete the conversion between analog and digital signaling within an SFP+ module results in the overall link performance hinging on both the module and line card performances. Since it is impossible to test every module with every port, new test methods are required to guarantee interoperability of module and line card to meet the relevant ITU or IEEE specification. The SFP+ specification (SFF8431) defines these test methods and the corresponding test conditions.
Hydra-SFP+ compliance test system integrates an ISI generator, Pattern generation, bit error rate detection, and system control software to automate SFF8431 compliance testing. The Hydra system automates module, Host card, IC and system level testing to make SFP+ compliance testing fast, easy and accurate.
- Comprehensive SFF8431 compliance test system for Linear Applications.
- Measure Receiver sensitivity
- DWDP – Receiver Waveform Dispersion Penalty
- dRN – added Relative Noise
- Differential Electrical output
- Integrated 10.3G Stress Generation and BERT functions.
- Automated stressed receiver testing
- Automated Sensitivity measurement
- Sweep power and measure BER
- Plot results on straight line BER vs Power
- Integrated 10.3G pattern generation
- PRBS 9, 15, 23, 31, balanced 9
- Alt 0 and 1, square 8, square 16
- Isolated 1
- Fully compliant SFF8431 stressors
- pre-cursor, symmetric, or post-cursor
- Additional custom stressors available (optional)
- Emulate FR4 trace lengths
- Emulate Optical receiver effects
- Emulate connector degradations
- Adjustable optical output
- variable power -30 to +4 dBM
- set ER to 3.5 or 6.5dB
- Adjustable Noise generation
- Enable/disable noise
- Adjust noise from 0 to 50qsq
- Full remote control via a set of SCPI commands
- Set signal pattern
- Select stressed or unstressed output signal
- Set output power
- Measure BER
- Future proof modular design
Product Description:
Hydra LRM Test System, consisting of:
Measurement Capabilities:
- Module, Host Card and IC testing
- Receiver Sensitivity with:
- SFF8431 compliant stressors
- No degradation signal
- Custom Stressors (optional)
- dRN – added Relative Noise
- DWDP- Receiver Waveform Dispersion Penalty
- Receiver Jitter Tolerance (per the SFF8431 standard)
- BER measurement
Options
- Additional custom stressors
- Dynamic stressor
- Transmitter pre-emphasis signal generation
|
