Signal/Coverage Reduced after flashing DD-WRT !

[varunmehta11]

I've flashed DD-WRT v24-sp2(19519) in my Dlink DIR-600 H/W: B2 Wifi Router..
Ever since then I've noticed a reduction in Coverage/Signal strength as compared to the Dlink factory Firmware..
Am i missing some settings in DD-WRT to be made so that the Coverage/Signal strength gets increased atleast upto the earlier level(When i had Dlink firmware) ??

 

[xylem]

Just a guess, but the default power DD-WRT transmit power setting (TX Power) might be too low or too high to be optimal for the DIR-600 antenna.

More info: http://www.dd-wrt.com/wiki/index.php/Advanced_wireless_settings

 

[varunmehta11]

The Default Transmit Power is 71mW.. Is it too high or low??
By the way, i had replaced the stock 2db antenna with an 8db antennae.. So do i have to change any settings for the new antenna ??

 

[JackMDS]

I would not go with more than 71mW. In matter of fact try to reduce to 60mW it might that 71mW generated high Noise and the Signal to Noise Ratio is off.

Changing Antenna does not need special setting.

Otherwise if there is No real reason (i.e., need for special feature) revert back to the stock firmware.

 

[AnonymouseUser]

Try different TX power to see what works best: 28mW, 42mW, 56mW, 70mW, 84mW. You really shouldn't go higher than 84mW unless you know what you're doing as it could overheat and shorten the life of the unit. If there is no noticeable difference between those power settings, set it to 42mW and leave it.

Also be sure you're set to 40MHz Channel Width.

 

[JackMDS]

The 84mW max. is more a matter of physical/electronically protecting the device.

Devices that were Not engineered for High Signal output tend to Amp. the noise together with the Signal. Device with (example) 50mW output and low SNR will function better than devices with 84mW (or more) if the the SNR of the higher out put is off.

The average End-Users Wireless is designed and works at about 33-40mW, the sweet spot of many of them End-Users is about 60mW.

 

[varunmehta11]

I would not go with more than 71mW. In matter of fact try to reduce to 60mW it might that 71mW generated high Noise and the Signal to Noise Ratio is off.

Changing Antenna does not need special setting.

Otherwise if there is No real reason (i.e., need for special feature) revert back to the stock firmware.

I've tried varies Transmit Values ,but still the coverage is lower compared to Dlink Stock Firmware..
The only reason I'm using DD-WRT is that i wanted to create another Guest Wifi Network with restrictions of Download and Upload Bandwidth, which is not possible in Stock Dlink Firmware..