Good luck: it seems generally for me the upload speed maxes at 50% of the download speed so I believe you'd be better with the Nano dish which has, I gather, a higher electrical power (22W/16W) so gives a stronger upload signal.
The legal power limit for Band C in the UK is 4 Watts EIRP, the nano dish has a lower power maximum output power than the nano M5 but does have a higher gain. The power would need to be backed off even then to conform to the +36dBm EiRP (4 watt) limit.
Basically subtract the gain of the antenna from 36 and that's the power level the radio needs to be set at.
The base station isn't allowed any more power either. This is what makes the technical challenges of the WiSP industry so much more "interesting"
The funny thing is, if you are a radio amateur with no technical expertise at all then you can legally transmit far higher powers on that band.. funny old world
I suspect your speed differences are more to do with how speed test sites deal with upload measurements as they often assume the upload is quite slow (as it is with most wireline technologies).
Bill Lewis - MD
Kijoma Broadband - (Division of Kijoma Solutions Ltd)
High Speed Wireless broadband ISP
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