... VC2000 is an intelligent multi-function instrument which measures Frequency, Pulse counting, Crystal. It has 4 step gate ... ,1.0S,5.0S, 10SAccuracy: Time base deviation X frequency +- 1 dProgressive Counting measurement4 steps CHB input terminalresolution: ... +- 1d, counting frequency: 10Hz - 4MhzCrystal measurement:Input Features:Input sensitivity for ...