Yes, it's all too clinical even with the superimposed defects - and why hasn't this surfaced before?
However, there was a 240-line Baird standard as detailed in the jpg attached. How far this got and whether it was ever transmitted I'll leave to the historians. Unless this document is also a fake, but it's been around for a few years so I would doubt it's come from the same source. I'm sure I've posted this before here a few years back.
I note that someone a few years back had an item on 240-line TV in the newsletter, I presume it may have been to this standard.
From the data in the jpg I worked out the following...
Baird 240-line system.
240 lines, 25fps, no interlace, 6kHz line rate.
Sync amplitude =40% of composite signal.
Single broad frame sync of 12 lines = 2ms, frame blanking of 20 lines = 3.333ms.
Line period = 166.7us, line sync is 8% line-time = 13.33us.
Active line video = 150us.
Line blanking is 10% of line time = 16.67us, no front porch. (Same with vertical).
Aspect ratio unknown...but appears to be 4:3.
At 4:3 aspect ratio active video needs a minimum of 293.3 pixels/line, = 325.9 pixels/line inc. blanking etc.At around this time Baird's development of CRT displays was on-going, but how he generated the source signals beyond test cards is open to discussion.
Steve A.
Oh yes! I really want to watch a program on ironing my laundry twice in one day! If anyone equates ironing with being a hobby they need their bumps felt!
http://www.urbandictionary.com/define.p ... mps%20Felt