Crystek's new PRO series, Pocket Reference Oscillator is an industry first. A complete HCMOS crystal clock oscillator has been integrated in a rugged SMA housing. Simply connect +3.3 V_DC to the female SMA side and it will output a clean low jitter signal from the male SMA side. In effect, each PRO is a fixed frequency portable crystal generator. Frequency stability is ±25 ppm over 0°C to 70°C, Available off the shelf in many standard frequencies, perfect for lab use.