# Trying to make sense of 3000 MU Grouping on this AP

**URL:** https://community.cambiumnetworks.com/t/trying-to-make-sense-of-3000-mu-grouping-on-this-ap/90527
**Category:** ePMP
**Created:** [January 17, 2023, 2:10pm UTC](https://community.cambiumnetworks.com/t/trying-to-make-sense-of-3000-mu-grouping-on-this-ap/90527 "2023-01-17T14:10:35Z")
**Posts on this page:** 1
**Showing post:** 3

<div class="post-metadata">

### Author: ![SWARG\_ANTENA](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/swarg_antena/32/25558_2.png) [@SWARG\_ANTENA](https://community.cambiumnetworks.com/u/SWARG_ANTENA)
#### Post date: [January 18, 2023, 8:46pm UTC](https://community.cambiumnetworks.com/t/trying-to-make-sense-of-3000-mu-grouping-on-this-ap/90527/3 "2023-01-18T20:46:29Z")

</div>

For the shown CPE positions 3D that natural (you use cambiums 4x4 antenna with ~35 deg grouping angle), EB and 07 are ~17 deg, D5 ~25 deg, 88 and 1B~30deg. Everything fits.

For others, it is a bad position

> [@ePMP 3000 MU-MIMO grouping Criterion](https://community.cambiumnetworks.com/t/epmp-3000-mu-mimo-grouping-criterion/61312):
>
> For the purpose of MU-MIMO grouping AP determines SM azimuth relative to its sector antenna. SMs can form a MU-MIMO group in case their angular separation matches the following criteria:[grouping.png] F, MHz Min1, deg Max1, deg Min2, deg Max2, deg 4900 13.0 38.9 64.8 90.8 5180 12.2 36.7 61.1 85.5 5240 12.1 36.2 60.3 84.5 5500 11.5 34.4 57.3 80.3 5720 11.0 33.0 55.0 77.0 5745 11.0 32.…

The bad thing is you can’t change the grouping angle on the 4x4 cambium antenna because the axial distance between the 2x(2x2) antennas is fixed.

That’s the reason why there was a call for test-users for this antenna with a changeable (optimizable) axial distance (last video)

> [@Searching for Antenna test users](https://community.cambiumnetworks.com/t/searching-for-antenna-test-users/87999):
>
> greetings, we have 4 free slots left for potential candidates that are interested in testing our new Antenna. A short introduction video for potential candidates. [[SWARG - Sector Antenna Test User Video] ](https://www.youtube.com/watch?v=0MkIUVZYbCU) BR, SWARG team

you can play around with the frequency and axial distance on this link, important is the position of the zero (-40 dB). For example 5800 MHz frequency with 2 elements (2 x (2x2 antenna)) and axial spacing 60mm (play with the phase delay to see the beam steering)

> **[CALCULATOR](https://antennaarraycalculator.blogspot.com/p/calculator.html)**
>
> PARAMETERS Frequency:  MHz Number of elements: 1 2 3 4 5 6 7 8 9 10 Inter-element distance:  mm Antenna e...

---

_[View the full topic](https://community.cambiumnetworks.com/t/trying-to-make-sense-of-3000-mu-grouping-on-this-ap/90527)._