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I would love to get more measurements but we simply don't have enough broadband installations around here to get my tools on. Those that I have had them on have all drawn slightly more power than my Garmin system with a 3205, but the smallest plotter I measured was a 7" and mine is 5". The difference is most often in the plotter.Those amp measures are great though. I love the idea of lower power usage, but I too think that I'll either be using radar, or I won't. In use, both technologies appear pretty much the same. Waiting a few minutes (in the extreme case) to have the pulse radars warm up doesn't seem like that big a deal to me.
The other problem is that installers & DIY's generally don't break out radar & plotter & N2K separately, on separate breakers, and instead lump them all on the same breaker. This, IMHO, is a disservice to the end user as the dome / radar interface box, N2K etc. can be in an always on mode the minute you fire up the plotter. If you don't need it I prefer a switch/breaker to isolate it. It also makes it more difficult to see exactly what the power consumption is for the dome and the plotter or the N2K instruments.. Also many plotters are pulled off of for N2K power, another installation practice I dislike.
Getting accurate measurements of these systems requires tracking down the individual power wires to clamp and measure.