The Tektronix M012 (P/N 155-0011-00) is a clock and chop blanking monolithic integrated circuit in a 16-pin DIP, designed by Les Larson.
It generates the 2 MHz chop clock signal for triggering the chop counter (155-0010-00 aka M004) as well as the chop blanking waveform. The blanking waveform can be delayed in time and varied in width over a certain range to accommodate different delay lines. It also has five logical inputs which are the plug-in and mainframe modes that are used to decide if chop blanking should be used at a certain time.
- 7503 (U55), 7504, 7514
- 7603 (U55), AN/USM-281C
- 7613, 7623, 7633 (U55)
- 7704, 7704A
- 7834, 7844 (U205), 7854 (A14U12)
- 7904 (U215), 7904A, R7903
- R7912, 7912AD, 7912HB