Ideal for Standards Compliance Testing
The OST-SRS provides inexpensive, fast, easy, accurate, and repeatable Stressed Receiver Sensitivity conformance testing of 10 Gigabit Ethernet devices.
- Measure compliance to the IEEE 802.3ae Stressed Receiver Sensitivity requirements quickly and easily using stable factory calibrations.
- Run automated receiver sensitivity tests with on-screen PASS/FAIL test results and plots that make it easy to determine abnormal behavior.
- Test receiver sensitivity using average optical power or Optical Modulation Amplitude (OMA) to understand how different quality transmitters impact receiver performance.
The OST-SRS is ideally suited for IEEE standards compliance testing of 10 Gigabit Ethernet optical components and modules such as XFP, X2, or Xenpac transceivers, 300-pin transponders, ROSAs, eye-opening chips, TIAs, SERDES chips, PINs, APDs, and receivers. The OST-SRS automatically generates factory calibrated real-world Stressed Receiver Sensitivity (SRS) test signals that are used to measure compliance to the IEEE 802.3ae 10 GigE LAN/WAN standard. OSTs are the de facto industry standard for SRS testing which means your test results will correlate with others performing SRS tests all over the world. Additionally, the built-in process control enables you to keep getting the same SRS test results. There are no complicated recipes to follow in order to generate the difficult to construct and hard to calibrate SRS test signal, just choose the variety of SRS signal you want from the graphical user interface and press start.
The OST-SRS automatically performs SRS tests and displays simple PASS or FAIL results at the conclusion of a test based on criteria you set, either exactly to a standard or to own custom PASS/FAIL values. All the functionality needed to conduct an SRS test is included in the OST-SRS including optical power meters, optical switches, attenuators, frequency synthesizers, clock sources, PRBS test pattern generator, stress conditioner, E/O and O/E converters, 4th order Bessel-Thomson filter, sinusoidal amplitude interferer, jittered clock sources, and BERT. Furthermore, sensitivity tests are automated and test results are conveniently displayed on-screen using Circadiant’s Straight-Line BER Plot that makes it easy to see if a DUT has abnormal behavior like an error floor. At the end of a test, you’ll have all the information you need to PASS or FAIL a DUT against an SRS standard.
The OST-SRS tests 1310 nm and 1550 nm single mode DUTs to the –LR and –ER SRS standards and with the optional A3318 850 nm/Electrical Interface also tests 850 nm multi-mode DUTs to the -SR standards. Contact your Circadiant representative for details on how to order the OST-SRS provisioned for the A3318 850 nm/Electrical Interface.
In addition to using real-world test signals, you can use non-degraded test signals when making sensitivity tests. The Circadiant Straight-Line BER displays measured BER levels versus a range of optical powers, or optical modulation amplitudes, and fits lines to the data points. Obtaining sensitivity measurements at exact BER levels with the OST-SRS is simple. Sensitivity is automatically interpolated between measured data points, or extrapolated beyond measured data points. This means quoting performance at the SRS 10-12 BER level is as simple as reading the value off of the display or forwarding supported Excel files. With the OST-SRS, there’s no need for you to use Mathcad type software to interpret test results – all the analysis is conducted with Circadiant’s powerful suite of statistical algorithms.
Instead of dealing with complicated equipment setups, time-consuming equipment calibrations, complex SRS signal compounds, iterative equipment programming, correctly applying fiber optic test theory, and manipulating BER probability statistics - the OST-SRS does it all for you. With an OST-SRS you’ll be making fast, consistent and correlated SRS measurements in no time. No wonder the OST is the worldwide de facto SRS standard.
Stressed Receiver Sensitivity
The 10 GigE LAN and WAN specification requires receivers to be tested using an optical signal that has both horizontal and vertical jitter, a poor extinction ratio and slow rise and fall times:
The OST provides test signals with factory calibrated degradations and sweeps over the jitter mask of 40 kHz to 10 times the loop bandwidth without the need for complex calibration procedures.
To configure a test, simply select the 10G BASE-L or 10G BASE-E test from the menu. When used with the A3318 850nm/Electrical OST Interface, 10G BASE-S may be selected.
Automated Sensitivity Test
Plots and computes BER vs. Optical Power or BER vs. OMA with PRBS (or optional protocols) using integrated optical power meters, attenuators, splitters, filters, etc...
Straight Line BER
The OST plots test results on screen using a special scale that for well-behaved DUTs will have a linear plot of BER vs. average optical power or BER vs. OMA. This feature makes it easy to see if there are any problems with the DUT such as an error floor.
Optical Ports
- Monitor Port - Taps either the transmitted or the received signal for output to an external device, such as an oscilloscope or an OSA.
- To DUT Port - The main output connector that connects to a DUT.
- From DUT Port - The main input connector that accepts a signal from a DUT.
Signal Output
- Clock Rate - 9.9 Gb/s, 10.3 Gb/s
- PRBS - 2^7-1, 2^15-1, 2^23-1, 2^31-1
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OST-SRS |
One A3308 and one A3301 in –SRS configuration |
A3318 Option |
One A3318 850nm/Electrical OST Interface (Includes A3318-R) |
A3318-R Option |
Hardware ready to control an A3318 |
