An off-axis misalignment compensating fiber optic cable plug is provided. The collected traffic logs are stored in a computer such that the traffic logs can be replayed. The inside slop, outside slop, andor adjustable range parameters may be input by a trader, and, among other things, allow a trader to prioritize orders, set parameters so that some orders are re-priced more aggressively than other spread orders. Filters may be tuned to pass or reject signals depending on the application; sample applications include, but are not limited to: agile filtering; spectrum analysis; interference detection and rejection; equalization; direct intermediate-frequency transmission; and single-sideband modulation and demodulation.