Wobbluscope

A Wobbluscope is an instrument that combines a sweep generator, a marker generator, and an oscilloscope. It is a very useful unit for the alignment of RF and IF video sections of a TV receiver. It may not have all the features of a high quality sweep generator but it is an economical and compact piece of equipment specially designed for TV servicing. The oscilloscope usually has a provision for TV-V(vertical) and TV-H(horizontal) sweep modes. An RF output, down to MHz, is available for video amplifier testing.

Ref:Electronic Instrumentation By H S KALSI