MY friend and I both have WZR-1750DHP, firmware v2.24 , and they have the same problem.
We found that WZR-1750DHP 2.4GHz 20MHz performance dropped off rapidly when the signal path through 2 Walls in 10m distance.
I also have WZR-HP-AG300H (firmware v1.78) , and its performance is better than WZR-1750DHP at 2.4GHz 20MHz in the same circumstances.
here is MY test details:
laptop: HP 8570w , windows 7 32bit; intel 6300AGN mini PCI-E card, intel proset wireless software v16.11 .
distance between laptop and router: 10m , 2 Walls between.
set: 2.4GHz 20MHz channel 3, other settings use factory default.
environment: may has serious multiplepath effect .
use WZR-1750DHP firmware v2.24 , the laptop wireless driver shows: -68dbm signal, 1Mbps to 13Mbps speed. internet content download is slow and may drop .
(the wireless speed shows 216.7 Mbps when I move this laptop very close to the router 1750DHP.)
use WZR-HP-AG300H firmware v1.78, the laptop wireless driver shows: -72dbm signal, 13Mbps to 58Mbps speed. internet content download is ok .
(the wireless speed shows 130 Mbps when I move this laptop very close to the router AG300H.)
WZR-1750DHP 's signal is better than WZR-HP-AG300H ,
but WZR-1750DHP 's wireless speed is worse than WZR-HP-AG300H.
WHY
HOW CAN I SOVLE THIS PROBLEM ?
CHANGE which setting will solve this problem
( web login : 192.168.11.1 , admin, password)
I am wondering that WZR-1750DHP use the SHORT GI (400ns) and WZR-HP-AG300H use the LONG GI (800ns)?
How can I change 1750DHP to LONG GI (800ns) ?
Because the environment may has serious multiplepath effect, using SHORT GI is not a good idea.
AM I RIGHT ?
HOW CAN I SOVLE THIS PROBLEM ?
thanks.