11-21-2010 12:05 AM - edited 07-03-2021 07:26 PM
hello
i recently aquired an autonomous version of the 1252 access point with 2 radios
i have two questions:
1) if i for example select 17 db = 50mW for the transmit power, is this the total power level for the access point? or does it double when i use two transmit antennas? meaning 1 antenna = 17db = 50mW, 2 antennas = +3db = 20db = 100mW? this is very important for regulatory considerations
2) i cant find an option to enable or disable TPC (transmit power control). i hope this is enabled by default?
regards
markus
11-21-2010 10:32 PM
Hi,
The power you configure is the transmit power at the antenna connector. so it does not take into account the antenna gain.
Example : 17dbm at antenna connector = 23dbm in the air (EIRP) if you have a 6dbi antenna.
Even though there are 3 connectors for a radio, only 2 can transmit (3rd one is receive only), and the 17dbm is on each connectors.
For example in 11n, each "connector" would transmit a different signal (dual spatial stream) and each signal would be at 17dbm.
I don't think this matters for the regulation rules because these are 2 different transmitters so you should not stack up their power to see if you comply to rules.
Nicolas
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11-22-2010 12:43 AM
thanks for the answer. well i'll have to see whether maximum EIRP is per device or per transmitter
any idea about TPC?
regards,
markus
11-22-2010 01:41 AM
As far as I know, you enable it by typing "power local ...". Defining local power rules means you lower the power rules for your SSID (below regulation). That's basically doing TPC.
Nicolas
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