Here's another neato plugin, albeit one made by a company other than Tek:

PULSE451APLG.jpg

It's a "programmable MOS/CCD pulse driver".

Sounds convoluted?

In simplistic terms, you apply a TTL (0/+5v) signal to the Input connector and the device converts that to a signal whose logic High and Low levels are set by the bottom two concentric controls. This allows you to control a variety of logic types, depending on how the states are set. Range is +/- 15v. Thus, all major families can be driven properly.

Of course, it makes for a neato RS-232/RS-485 level converter/transmission driver. Just apply your TTL-level ASCII signals to the Input connector and connect the Output to the device under test - after setting the levels.

Transition delay (slew rate) is also adjustable from the front panel. Helpful when playing with state timing and evaluating propagation delay through an array of gates.

These plugins were originally designed to drive charge-coupled device (CCD) imaging arrays hence the flexibility when it comes to setting output parameters - especially rise and fall times.