Logic Pulser Probe B&K Precision Model DP 31A MSRP: $37.00 1 Year Warranty Overview For TTL, and CMOSProduces 10mS pulse signals at 100mAExternal square wave terminalSync input terminal0.5pps/400pps Pulse repetition Rate Where to Buy DIGI-KEY Model Qty DP 31A15 As of: May-17 10pm PDT Home Products Component Testers Logic Probes Model DP 31A