The World's Newest Teletext Inserter

Here is VBIT up and running being controlled by a Justin Mattair AVR XMEGA.

From blogpics

And here is a picture of some dodgy looking VBI, line 12 to be precise. Mostly this is the fault of the low bandwidth scope but I might try some more decoupling.

From blogpics

This 13.5kg boatanchor scope, namely a Telequipment D755 is really difficult to use. It was last calibrated in 1987. It doesn't lock on TV signals, in fact it doesn't lock on anything for the first hour, no exaggeration. Probably some caps need replacing. But then it does manage to lock onto the field flag when it warms up. The A/B dual sweep is a wonderful thing coupled with a precision multi-turn delay wheel. I think it is a 10MHz scope but the poor thing doesn't have any contrast for fast signals so 4MHz is about the real practical limit unless you work with the lights off.
[UPDATE] The wobbly vbi was caused by not having the video output terminated. With 75 ohms attached it was clear enough to read the MRAG straight off the vbi.