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Scott Fella Tue, 09/10/2013 - 03:52
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It will work, but you will only be able to transmit from the radio that the antenna is made for. So if its a 2.4ghz antenna and you put that on a 3602 for example, then you need to disable the 802.11a radio and it will not work for that band.

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Scott Fella Tue, 09/10/2013 - 06:51
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I understand, so let me clarify why Insaid what I said.

It's not something everyone does, there have been post in the past where users have migrated from 1242's for example to 2600's or 3600's and still want to use the same AP's temporarily. Normally, you would want to purchase new antennas and that is the norm, but in very few cases, antennas need to be reused in which it will work, but not recommended.

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EvaldasOu Tue, 09/10/2013 - 07:01
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I agree that it should work and it can work, if all the antenna/ connector parameters matches.


But if it does not match, antenna can warm up, catch the fire and possibly burn the building.

Joeri De Winter Tue, 09/10/2013 - 09:43
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That would be a dramatic outcome...


The test case would be a bridge link on two 2602e access points with AIR-ANT5170P-R antennas over 500m, the antenna connectors only connect to 2 of the 4 access point connectors.


The customer had already bought these items and wants to install these between 2 buildings over 400 meters.


It's not recommended, but I guess it should work

any other drawbacks?


thx in advance


J.

vlad.mihailov Tue, 09/10/2013 - 09:51
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It is not only possible its actually one of the ways to use some of the antennas released for 1552-series. There are antennas that are released for the use with only single band while 1552E has a dual-band antenna feeder.


http://www.cisco.com/en/US/prod/collateral/wireless/ps5679/ps11451/data_sheet_c78-641373.html


http://www.cisco.com/en/US/docs/wireless/antenna/installation/guide/ant5114P.html

George Stefanick Tue, 09/10/2013 - 10:00
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It will work. But you might expect higher reties and other crazy stuff. You are releasing a wave form from the radio that doesnt match the antenna element.



__________________________________________________________________________________________
"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin
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vlad.mihailov Tue, 09/10/2013 - 10:10
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George,


Why is that? Feeder is dual band and antenna is specified to work with one of the two bands. I don't see any issues using this setup from the RF point of view. ...leaving trivia about non-matching impedence-related issues aside.

George Stefanick Tue, 09/10/2013 - 11:05
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Vlad my friend you are correct. I read this question as if there was a mis match between the radio freq and the antenna freq.

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George Stefanick Tue, 09/10/2013 - 11:08
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But yes the antennas are tuned for the freq you plan to use ..

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Joeri De Winter Tue, 09/10/2013 - 10:18
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Hi George,


interesting, so this means that the antenna elements are different for dual mode antenas as for single mode antennas and the radio waves comming from the access point are "tuned" towards the type of antenna (single or dual mode).


so in the case of an 1602e access point you can use the AIR-ANT2566P4W-R (dual band, 4 ports) antenna and skip one antenna cable.

but you can not use the AIR-ANT5140V-R (single band, 3 ports) antenna on that 1602e access point and disable the 2.4GHz band.


bottomline,  dual mode ap connectors need dual mode antennas

vlad.mihailov Tue, 09/10/2013 - 13:29
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You can use MIMO antenna that is single band with MIMO AP connectors that is dual-band provided that the antenna is for WiFi :-)

Joeri De Winter Tue, 09/10/2013 - 14:02
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Hey Vlad,


So if I am correct, you can use a AIR-ANT5140V-R (single band, 3 ports) antenna on a 1602e access point and disable the 2.4GHz band.

or use this antenna on the 2602e and only enable the abc connectors.


on the 2602 you can select which antenna connectors you want to enable connector a (single antenna) , ab, abc or abcd, quite confusing if you can only use MIMO antennas i would say.

vlad.mihailov Tue, 09/10/2013 - 14:06
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Yes that is correct. You can use this antenna and disable 2.4GHz and you can use that antenna while disabling unused connection at the AP that has 4 feeders.

Darren Roback Wed, 04/23/2014 - 04:48
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Vlad - do you recall how to disable a particular connector on a 2600/3600/3700 AP?

Thanks,

Darren

Abhishek Abhishek Tue, 09/10/2013 - 13:09
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Yes, you can do that to install single band antennas onto dual band AP connectors. It will definitely work but not recommended.

Howard Chen Thu, 03/02/2017 - 19:41
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Not working on indoor mode, but working on outdoor mode.

tested single band antenna (cisco) on cisco 2702e, using airmagnet to test the signal level, 0 dB, same as no antenna installed.

tested 5GHz directional antenna on Cisco IW3702e, didn't disable the 2.4GHz, still working.

Scott Fella Thu, 03/02/2017 - 20:23
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I have used single band on 2702's before and it works. Now the single band was 2.4ghz and we later swapped the antenna with a dual band.  I'm assuming your single band was a 4 lead antenna.

-Scott 

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