Maximum EIRP for DIR-825?

Post new topic   Reply to topic    DD-WRT Forum Forum Index -> Atheros WiSOC based Hardware
Author Message
Justice
DD-WRT Novice


Joined: 26 May 2017
Posts: 4

PostPosted: Mon Jul 03, 2017 1:49    Post subject: Maximum EIRP for DIR-825? Reply with quote
Under the Canadian regulatory domain, the maximum allowable TX power is something like 30 or 36dbm iirc.

According to this page on the DIR-825: https://www.dd-wrt.com/wiki/index.php/D-Link_DIR-825 the maximum TX power is 19dbm, which appears to be hardware limited.

From what I've been reading the effective total power (EIRP) is calculated by adding the TX power and antenna gain together. The router will be limited to the lower of the regulatory domain or hardware limitations.

My question is since the Canada EIRP limit is way higher than 19dbm and the DIR-825 maximum TX power is 19dbm, will setting the antenna gain to 2dbi translate into an effective power of 21dbm or would it be 17dbm TX power and 2dbi antenna gain?
Sponsor
tatsuya46
DD-WRT Guru


Joined: 03 Jan 2010
Posts: 5436
Location: WPG, Canada

PostPosted: Mon Jul 03, 2017 5:10    Post subject: Reply with quote
gain in settings does nothing, u want to change actual antenna gain, change the actual antennas, the gain setting is just supposed to limit tx power in the event the user sets something higher than what the regulatory domain supports, but then anyway the reg domain will cap at it's limit anyway, its a pointless setting just leave it 0 & ignore it.

and previously eeproms were being read incorrectly resulting in tx powers getting cut short, set canada as reg domain, set tx power to 30 for both radios, for 5ghz use ch 149-161, whatever the reported max is for each radio is the actual limit. i dont have one anymore so i can try it and see what its limit is so i cant update the wiki.

_________________
LATEST FIRMWARE(S) || Qualcomm Atheros Wi-Fi Settings Guide || Qualcomm Atheros Repeating

[QUALCOMM] R7800 ---------------> DD-WRT v3.0-r33006 std
[QUALCOMM] DIR-862L ------------> DD-WRT v3.0-r33167 std
[QUALCOMM] WNDR4300 v1 ------> DD-WRT v3.0-r33167 std
▲ ACTIVE / INACTIVE ▼
[BROADCOM] DIR-860L A1 --------> DD-WRT v3.0-r33167 std

BrainSlayer wrote:
we just do it since we do not like any restrictions enforced by stupid cocaine snorting managers


Love you AM never forget 10/26/2013..

RIP dad 1945 ~ 2017..
Justice
DD-WRT Novice


Joined: 26 May 2017
Posts: 4

PostPosted: Mon Jul 03, 2017 21:33    Post subject: Reply with quote
FYI, I have done the above and the maximum TX power on ath0 is 19dBm and the maximum TX power on ath1 is 17dBm.
tatsuya46
DD-WRT Guru


Joined: 03 Jan 2010
Posts: 5436
Location: WPG, Canada

PostPosted: Mon Jul 03, 2017 21:53    Post subject: Reply with quote
then theres no change to it and thats just the limit of that router
_________________
LATEST FIRMWARE(S) || Qualcomm Atheros Wi-Fi Settings Guide || Qualcomm Atheros Repeating

[QUALCOMM] R7800 ---------------> DD-WRT v3.0-r33006 std
[QUALCOMM] DIR-862L ------------> DD-WRT v3.0-r33167 std
[QUALCOMM] WNDR4300 v1 ------> DD-WRT v3.0-r33167 std
▲ ACTIVE / INACTIVE ▼
[BROADCOM] DIR-860L A1 --------> DD-WRT v3.0-r33167 std

BrainSlayer wrote:
we just do it since we do not like any restrictions enforced by stupid cocaine snorting managers


Love you AM never forget 10/26/2013..

RIP dad 1945 ~ 2017..
Display posts from previous:    Page 1 of 1
Post new topic   Reply to topic    DD-WRT Forum Forum Index -> Atheros WiSOC based Hardware All times are GMT

Navigation

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum