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 ns, bandwidth is 15 MHz. The sensitivity ranges from 5 mV/cm to 20 V/cm. A design compromise, Type H is not as fast as Type B, but it is DC-coupled on all ranges.
Later Type H models use a turret attenuator. Type H with S/N less than 10,000 have ordinary attenuators.