lightbulbjim wrote:RCModelReviews wrote:I think EU regs allow for 100mW on systems that use more than a certain percentage of the band on a constantly hopping basis so you should end up with your power adjusted upwards.
Makes sense, assuming it's smart enough to lower the output when transmitting in DSM2 mode.
Fact 1: EN 300 328 mandates that you have to hop between a certain number of channels within a certain amount of time. Obviously that means the transmitter frequency
Fact 2: Horizon just ignored that and claims that "receiving" on other channels qualifies as hopping, even if your TX only transmits on two individual frequencies. They blast away at 100mW while transmitting on just two channels.
DX7 conformance report: http://shop.lindinger.at/pdf/74939.pdf (used to be on http://www.horizonhobby.de/m/i/n/Ho%200 ... 0v2.08.pdf but has been taken down by Horizon recently)
I spoke to Horizon engineers (as in, I met with them in person, not just via the internet) and asked them the hard questions. They told me that they do NOT send on those other frequencies in DSM2, but they "listen". When I asked about what they do with that information, the guy shrugged and said "nothing". This correlates with my own measurements which show two peaks at 100mW, which basically means that any DSM2 system is simply violating EN 300 328.
That conformance test above is obviously phony, look at chapter 8.4.3.4:
"Hopping" - "40 non-overlapping hopping channels measured"... "Further test results provided: No"
40 hopping channels measured, with a DSM2 system huh? I don't think so. Plain and simple, DSM2 is violating EN 300 328 and DSMX is their way of fixing this.
"The world's first wideband, frequency-agile 2.4GHz signal protocol"? Right. I just invented the world's first wheel (tm).