[Notimetolooz]

The 1070 is the first in a series of instruments that were called TV Analysts. CORRECTION: The model 1000 was first.
I think the series went 1075, 1076, 1077 and 1077B. As time went on each one had more capabilities than the last one. The 1077s had some solid state circuits and more color capabilities. I am not sure the 1070 had any color capabilities. The instruments all generated a NTSC (analog) video signal.
In addition, later models at least, sourced drive signals for vertical and horizontal sweep. All of those could drive tube circuits, in addition the later models could drive transistor TV circuits. There is also an audio test signal.
Since the video image comes from a large "slide" the early models were also marketed to TV stores as a source for TV demonstration and advertising using a custom slide.