The Tektronix 067-1064-99 is a demo aid for programmable TM 5000 instruments.
It provides a variety of circuits configured by a six position dip switch to provide
- a non-inverting AC or DC coupled variable gain amplifier
- a free running triangle-squarewave generator at 200 kHz, 330 Hz or 1 Hz
- a zero crossing comparator
- a 4-bit binary counter with preset inputs and LED display
- ±18 V overvoltage protection (crowbar) and reverse voltage protection diodes