Tektronix DC503A The DC503A Universal Counter / Time

The DC503A Universal Counter / Timer offers a broad range of measurement features at an affordable price. The instrument has two input channels, A and B, each with 125MHz capability. Each channel has separate triggering level, triggering slope, attenuator, and coupling mode controls. Eight measurement functions are available and an averaging feature allows averaging of 1 to 10 occurrences of the signal of interest. Signals to be counted or timed can be applied to channels A and B via front-panel BNC connectors or through rear-interface connections. The unit features an easy-access front panel and an LSI-based design for increased instrument reliability. The instrument is equipped with a temperature-controlled 10MHz crystal oscillator to obtain a highly stable and precise internal time base.