Re: HERMES Lite 2
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In fact it grows faster than exponentially. The rate of growth of number of sproggies is near-enough a factorial function of the number of frequencies (conversions) present. Factorial being the fastest mathematical function there is - I think.
The Inmarsat-3 satellite transponder - which went through its design phase in the late 1980s had multiple (reprogrammable) local oscillators to steer uplinks blocks of frequency to L-band blocks to allocate to spot beams, going via an IF in the VHF region to use SAW filters. The sheer number of possible interactions that had to be thought about was horrific. And computer processing power back then was orders of magnitude lower than it is now; some calculations of high order IMPs took overnight on a PC of that era.
On Fri, 29 Jan 2021 at 15:55, Chris Bartram G4DGU <chris@...> wrote:
I have a Hermes Lite 1 (essentially much the same as the HL2, but minus