Support MR76 and MA-ANT-27

[TheCongQTM]

The local supplier installed some MR 76 APs for us, but they seem to have installed it wrong with the MR74, the antenna wire they installed is as shown in the attached picture, I know they installed it wrong. But the number of APs is quite large and on the high side they say it's okay to install because we only used 2.4GHz at first,
Will such installation have any effect on the broadcast quality, I find the coverage is not good

[antonis_sp]

That is quite obviously a wrong way to attach the antenna. 

You might see 2.4 and 5 GHz transmitting, but performance will be impacted.

MR76_Installation_Guide#Attaching_the_antennas_to_the_AP 

I am quite sure that support would confirm this a not supported scenario.

You would need two antennas per AP.

[GreenMan]

@antonis_sp is right - this is absolutely not the way to do it.   The ANT-27 is fine, in general, but you'd need two of them and you need to point them in the same direction.

[TheCongQTM]

Yes, We are planning to reinstall the antenna

[GIdenJoe]

Also if you're only using one antenna make sure you are not running dual band on these AP's.

And to avoid moisture problems get waterproof metal caps to cover your open N-type ports.

[ZO-ZO]

Can i ask addition question on your thread? I ran into multiple opinion on how to attach the sector antenna to the AP. MR76 is dual band, but it specifically marked on the AP that upper 2 ports are 2.4 and lower 2 ports are 5. So is dual band mean each port give out both, so I have 4 ports of 2.4/5 GHz. So what is an appropriate way to attach the ANT. For example, I want to use MA-ANT-27 and MA-ANT-25 for that AP, should I attach one antenna cable to 2.4 GHz and one cable to 5 GHz port? Or I connect ant-25 both cables to 2.4GHz and ant-27 both cables to 5 GHz. But if I want ANT-25 give out both 2.4 and 5, can I split the connection? What is correct way? I just want to understand. Thank you in advance.

[GreenMan]

The markings on the MR76 AP are correct: 2 antenna posts are dedicated to 2.4 GHz only.  The other two posts; to 5 GHz only.  You need to ensure the same coverage cell for each radio, so if you have (for example) an ANT-25 and an ANT-27 then, because they are both dual-band antennas, you could use each antenna on either radio, but you must connect both pigtails of an antenna to the same radio.  Do not split them one to 2.4 & the other to 5.

[ZO-ZO]

Thank you so much for verification. This help clear thing up a lot.