Profile: Pulse Research Lab manufactures mini modular instruments and prototyping tools. Our RF splitters & amplifiers feature ready to use modules, high bandwidth, clean pulse response, DC coupled 50 ohms I/Os and active modules include ±8.5V AC/DC adapter. The PRL-470B is a high speed 50 Ohm line driver/level translator with independently variable output hi and ;o levels. It has TTL- and NECL-compatible inputs. The TTL input has a 50 ohm to ground termination, and the single-ended NECL input has a 50 Ω/-2 V termination. The TTL and NECL inputs are logically ORed, therefore a Hi level applied to either input can be used as a gate signal.