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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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23rd Mar 2017, 9:53 pm | #21 | |
Octode
Join Date: Nov 2010
Location: Ross-on-Wye, Herefordshire, UK.
Posts: 1,654
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Re: WWII oscilloscope bandwidth mystery?
Quote:
Harmonic content is better examined on a spectrum analyser in the frequency domain. These weren't available during WWII either, but who cared. No-one else was working even at 3GHz, so there was no need to worry about interfering with someone else at 6, 9 or 12GHz! The first time I needed a scope at VHF (around 100MHz) was when I started design of frequency synthesisers at Pye Telecom in the late 1970s. I had to design the frequency dividers nearly from scratch because back then there were very ICs on the market to do the job. I had to design a transistor stage for instance to interface between ECL and CMOS - and that did require a scope. I used a sampling scope, which showed up voltage levels and rise and fall times. As I recall it had a bandwidth out to about 2GHz with the right probes. Richard |
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