Eric Johnson

[Eric Johnson @ej_wireless]

@HPE_Aruba_NETW Indoor APs outdoors. Hmm. Does the FCC know about this?

[Eric Johnson @ej_wireless]

@jerrodhoward @troymart that is not my hat

[Eric Johnson @ej_wireless]

@troymart @sethfiermonti @Cisco And the link balance is set on conducted power The client, with 0 dBi antenna is 14 to 17 dB total conducted

[Eric Johnson @ej_wireless]

@troymart @sethfiermonti @Cisco 20 MHz channel
For 8 dBi(?) antennas
20 MHz 5 + 13 = 18 dBm EIRP
18 dBm EIRP is 10 dBm conducted
is 4 dBm per chain for 4 chain
is 1 dBm per chain when we remove unintentional BF
is -2 dBm per chain when PSD peakiness is removed
Actual conducted power is 4 dBm and 12 dBi EIRP

[Eric Johnson @ej_wireless]

@troymart @sethfiermonti @Cisco Properly calibrating a radio below 0 dBm is not a simple exercise

[Eric Johnson @ej_wireless]

@troymart @sethfiermonti @Cisco 40 MHz is 7 and 15

[Eric Johnson @ej_wireless]

@troymart @sethfiermonti @Cisco it is odd to use directional antennas indoors because it impairs MIMO due to fewer reflections. Uplink is helped but the downlink and maximum conducted power is usually the game with 6 GHz LPI. There are a few corner cases that may benefit from this offering.

[Eric Johnson @ej_wireless]

@HypergeekWiFi @troymart @Cisco or standard device with omnis on a wall adapter to keep the AP horizontal.

[Eric Johnson @ej_wireless]

@HypergeekWiFi @troymart @Cisco Doing so while reducing side bounces is detrimental to multi stream operation.
A 90 degree beamwidth would have been better.

[Eric Johnson @ej_wireless]

@troymart @sethfiermonti @Cisco By going to 4 they get unintentional beamforming. This is a nasty little provision that you need to reduce your conducted power by 10 log Nant. The cross Pol gives a 3dB offset

[Eric Johnson @ej_wireless]

@troymart @sethfiermonti @Cisco But they should have stopped at two elements

[Eric Johnson @ej_wireless]

@troymart @sethfiermonti @Cisco it looks like the antenna is x Pol. That is a good thing

[Eric Johnson @ej_wireless]

@troymart @sethfiermonti @Cisco That's a really long article that says very little

[Eric Johnson @ej_wireless]

@Vairol3to @ArubaNetworks Ahh but they aren't really. Those antennas have wide beam widths in horizontal and vertical

[Eric Johnson @ej_wireless]

@sethfiermonti @ArubaNetworks But can you mount outdoor APs on it?

[Eric Johnson @ej_wireless]

@jerrodhoward hah

[Eric Johnson @ej_wireless]

@MackenzieWiFi @ekahau Also. if all three client have equal loads to send the queuing algorithm is likely cycling the client's thru the bigger slice so that they all take roughly the same time to complete

[Eric Johnson @ej_wireless]

@MackenzieWiFi @ekahau have the ability to modify the algorithm to manipulate priorities. It is not reasonable to think that an end user can/should tweak that