Quote:
Originally Posted by Chris K
Hi Tom...so this newfangled Fnirsi digital scope won't be able to help me align these TVs with this generator? I have a 60MHz Tektronix 2213A analog scope. Should it work on that? There are pictures online of individuals measuring the EICO 369 RF output (just the RF output...no sweeping or markers) with new scopes like Rigol equipment with perfect waveforms.
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I may have misunderstood what you were asking about doing...
I assumed above that you were using the scope to check/calibrate frequency output of the sweep generator....Which is a whole different can of worms than actual TV alignment using the scope and sweep generator.
Generally speaking you want to calibrate the fixed frequency markers (especially if they're not crystal derived/controlled) and not calibrate the sweep...So long as the sweep extends past the lowest and highest frequency markers and the sweep is flat (ignoring marker blips) when the generator output is bypassed directly to the demodulator probe it should be fine.
Some of the below may be slightly wonky compared to your setup as I'm only familiar with sweep alignment with the B&K 415...It basically packaged multiple alignment instruments and cables into one simple package and had an X-Y output any scope could use...You can achieve the same effect with other/older equipment but the connections are somewhat different.
You can use any of your scopes in X-Y mode for alignment (as long as they have X-Y mode and you have a demodulator probe or connect after the sets detector) with a sweep generator for alignment. The demodulated output of the sweep generator (which is close to DC) after going through the TV and a demodulator probe is fed into the X axis of the scope (the scopes Y axis has to be fed by the (often 60Hz) sweep oscillator. I think there were some applications for undemodulated sweep.