10 Gbit/s bit-error-rate tester integrates a pulse pattern generator, error detector and signal generator - all the essential elements in bit-error-rate measurements - in a compact module
Yokogawa has introduced a 10Gbit/s bit-error-rate tester to the range of modules available for the company's AQ2200 series modular optical instrumentation system.
The new AQ2200-601 integrates a pulse pattern generator, error detector and signal generator - all the essential elements in bit-error-rate measurements - in a compact module.
When combined with other AQ2200 series modules such as optical modulators, receivers, power meters and attenuators, it provides all the facilities required for error-rate curve measurements and optical device characterisation, says the company.
The pulse pattern generator function can generate patterns up to 256 bits in length (optionally extendable to 64Mbit) including pseudo-random binary signals (PRBS) from PRBS7 to PRBS31, with support for multiple bit rates from 9.95 to 11.32Gbit/s, variable in steps of 1kHz.
The 64Mbit option support SDH/Sonet frame programming.
Other adjustable parameters include output amplitude (0.5 to 2.0V peak-to-peak in steps of 10mV), offset (-2.0 to +3V in steps of 10mV), and crosspoint (30% to 70% in steps of 1%).
A trigger output is provided for oscilloscope synchronisation, as well as a port for external 10Gbit/s clock synchronisation input and 1/16 or 1/64 synchronisation input.
This makes it possible to perform an error rate test with jitter deliberately added to the data pattern.
A clock and data recovery (CDR) function extracts the clock from the data signal and performs synchronisation when a data signal is the only input.
In optical communications, the CDR function is a useful tool because the data signal is often transmitted alone.
In addition to the CDR input port, there are ports for separate data and clock signal inputs.
The AQ2200-601 can be used with the AQ2201 three-slot or AQ2202 nine-slot mainframes to form a complete compact, lightweight optical measurement system that optimises the use of laboratory bench space and is easily portable.
