In a word, yes!AidanLunn wrote:... did TV pattern generators of the period (late 1940s/early 50s) really display patterns as basic those on the screen of the Sony 9-90UB?
Again, in a word, no! Look at the (lack of) complexity in yours - it could hardly be much simpler!AidanLunn wrote: I'm not expecting a complete test card or anything of the ilk, but were they not advanced for full crosshatches and so on?
Terrykc wrote:These generators didn't even produce sync pulses! They simply generated square waves - as you can see - at multiples of line or field frequency with the hope that a TV would lock on to an appropriate sub-multiple. Sophisticated these devices were not!
F. Livingston Hogg wrote:The writer makes no apology or attempt to conceal the bee in his bonnet on this matter. He considers that no one should have the temerity to attempt television servicing commercially without a pattern generator, and, furthermore, that any pattern generator not conforming fully to B.B.C. standards should not be allowed on the premises!
Apologies - I'm getting confused with a fully fledged colour bar generator of German origin (Grundig, possibly?) that I became acquainted with a few years later. This had a densely packed PCB containing, amongst a lot of other things, a number of blocking oscillators in the sync divider chain to give the correct line/field timing, etc.Terrykc wrote:... Then we bought the RBM generator with its broadcast standard sync pulses ...
There was certainly a Körting generator (I have one), which was also badged as a Decca and unusually, did NTSC4.43 as well!Terrykc wrote:Apologies - I'm getting confused with a fully fledged colour bar generator of German origin (Grundig, possibly?) that I became acquainted with a few years later.Terrykc wrote:... Then we bought the RBM generator with its broadcast standard sync pulses ...
Cathovisor wrote:... I think you do some generators a massive disservice, Terry.
Cathovisor wrote: The trouble with the TPG11 was its price - it was very expensive and thus way out of the reach of the average low-rent TV mending establishment run on a penny-pinching shoestring.
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