b&k television analyst model 1077b. Does it have a use purpose on my bench?

[Notimetolooz]

The ringing tests check yokes and flybacks and sometimes other transformer for shorts. Basically they force a current pulse through a winding and because of stray capacitance a decaying sinewave appears across the coil. If there is a short the sinewave stops rapidly. There are a couple of specialized meters that do just this test.
The plate drives are substitute signals to drive sweep circuit components. The wave shapes are special.