Cisco 1242AG, 1 or 2 antennas???

Unanswered Question
Mar 16th, 2010

I have a 1242AG that I am implementing in a Nursing Home facility. We are using D-Link 7dB antenna's 2.4Ghz. My question is if I use 1 antenna on the right (primary) side compared to running 2 antenna's in diversity mode, which mode is faster??? I've searched all the forums and can't find an answer. Thanks.

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Jon Marshall Tue, 03/16/2010 - 07:44

bluesuperman1978 wrote:

I have a 1242AG that I am implementing in a Nursing Home facility. We are using D-Link 7dB antenna's 2.4Ghz. My question is if I use 1 antenna on the right (primary) side compared to running 2 antenna's in diversity mode, which mode is faster??? I've searched all the forums and can't find an answer. Thanks.

Jason

You will probably get a quicker and much more informative answer if you moved this thread to one of the wireless forums as that's where the wireless experts hang out.

Jon

dancampb Tue, 03/16/2010 - 07:57

Multiple antennas as you mentioned will allow diversity.  Only one antenna is still used at a time.  Whichever antenna receives the cleaner signal will be the one used.  So technically multiple antennas won't change the speed directly, but it will help because of the multipath mitigation.

Leo Laohoo Tue, 03/16/2010 - 15:23

If you want to install only ONE antennae, use the "Primary" antennae and disable Diversity.  If you want to use only one of the two radios (a/g or b/g) then disable the radio you don't use or you might "burn" the radio transmitting without any antennas.

Scott Fella Tue, 03/16/2010 - 17:55

Be careful with too high of a gain antenna.... depending on your coverage... your client might hear your AP but your AP might not hear the client.

engineerangelo Tue, 03/16/2010 - 21:35

Hi,

If your D-Link Antennas are dipole antennas, then it's really better if you use both connectors on the AP because dipole antennas are really designed to work as a pair because they overcome multipath distortion. But if your antennas are not dipole antennas, but instead the regular omnidirectional antennas, then just use 1 connector. Using omnidirectional antennas (that are not dipole) in both connectors is not recommended by Cisco. See the link: http://www.cisco.com/en/US/partner/prod/collateral/wireless/ps5678/ps6973/positioning_statement_c07-565470_ps469_Products_Data_Sheet.html

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