Tektronix 7B50 Time Base was built for use in conjunction with the Tektronix 7500 Series oscilloscopes. The insertion may be used together with all other oscilloscopes in the 7000 Series. The 7B50 is calibrated 5 seconds / DIV up to 50 nsec / div. With the beam expansion factor of 10 from a maximum of 5 ns / div to be achieved. The insertion can trigger on signals up to 100 MHz. The uncalibrierte position allows a variable adjustment of the deflection.The Delaying variant is the 7B51 plug-in.