The Picosecond Pulse Labs Inc. Model 5915 custom low-pass or risetime filters can be built to the user’s specified –3-dB cutoff frequency from 35 MHz to 10 GHz or to a 10% to 90% risetime between 35 ps and 10 ns. The company will build and ship the custom filters within five business days of receiving an order. Manufactured using a proprietary absorptive design, these filters provide attenuation and group delay characteristics similar to those of the fourth order Bessel-Thomson filter, but with superior transient response. Contact the company for pricing information. Check out www.picosecond.com.