The Tektronix Type H is a single-channel plug-in for 500-series scopes. It provides two inputs and has a switch to select between them. The rise time of the plug-in is 20 nanoseconds; bandwidth is 15MHz. The sensitivity ranges from 5mV/cm to 20V/cm. A compromise, Type H is not as fast as Type B, but it is DC-coupled on all ranges. Some Type H's use a turret attenuator.