Darren - We'll take a look but the external gain for 450D is locked because that is the property of the HW with the attached dish and radome. This is not changeable intentionally.
The internal HW of the 450d is actually an integrated 450SM in a new housing, so there actually is some internal gain via the 9dBi patch antenna, so that would account for the difference. So TxPower + internal patch gain + external dish gain <= EIRP would mean -4 is our max TxPower for 5.4 FCC to stay <= 30 dB EIRP. However, we will take a look - there was some feedback at Wispapalooza that some customers were having issues installing these in 5.4G band, but the tx power should be correct. Regards, -Aaron -----Original Message----- From: Darren Shea [mailto:[email protected]] Sent: Tuesday, December 01, 2015 3:58 PM To: [email protected] Cc: Matt Mangriotis; Aaron Schneider Subject: RE: [AFMUG] Canopy 14.1.1 Aaron, I had a question about a change Cambium implemented on the 450D radios, although it's not new to 14.1.1 (I think it started in 13.4): the Power Control section on the Configuration -> Radio, External Gain setting is no longer adjustable, and is locked in at 25dB. OK, but the radio seems to be thinking it's got some sort of additional gain, because it won't transmit higher than -5dB (reported in Link Status). Shouldn't the EIRP in the DFS band be 30dB, so it could transmit as high as 5 dB? This seems to be causing a major connectivity issue in the 5.4 band, but not in the 5.7 band, where transmit power is reported as anywhere from 16 to 22dB on the same SM to the same test AP. Why the disparity? Is there any hope for using 5.4 GHz frequencies on a 450D SM to a tower you could not hit with a football?
