30-11-2020, 05:56 PM
Out of curiousity I looked at the history of pulse and bar testing. It's obviously a lot easier to look at a waveform monitor and see an immediate result than perform a frequency sweep. P&B also gives phase (or group delay) information which otherwise would need a vector voltmeter or vector network analyser.
Weaver (BBC Designs Dept) wrote this monograph in 1965: http://downloads.bbc.co.uk/rd/pubs/archi...aph_58.pdf It covers the extension of P&B testing to colour. He cites Macdiarmid and Phllips (1958) which I think is the seminal paper on P&B. I don't have a copy to hand.
The inference, though not proof, is that until the late 1950s, all response testing was done in the frequency domain.
Weaver (BBC Designs Dept) wrote this monograph in 1965: http://downloads.bbc.co.uk/rd/pubs/archi...aph_58.pdf It covers the extension of P&B testing to colour. He cites Macdiarmid and Phllips (1958) which I think is the seminal paper on P&B. I don't have a copy to hand.
The inference, though not proof, is that until the late 1950s, all response testing was done in the frequency domain.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
