IWR6843AOPEVM: How to disable Rx antennes

Hi everyone,

I'm trying to create a profile simaliar to that is been used in production for my company, they use the IWR1443.

one of the configurations is that there are only 2 RX antennes active.

but when i try to do that i get constant erros without explanation.

currently this profile works, but when i set the channelCfg from 15 to 12 it dosn't work

% ***************************************************************
% Created for SDK ver:03.06
% Created using Visualizer ver:3.6.0.0
% Frequency:60
% Platform:xWR68xx_AOP
% Scene Classifier:best_range_res
% Azimuth Resolution(deg):60 + 60
% Range Resolution(m):0.039
% Maximum unambiguous Range(m):11.99
% Maximum Radial Velocity(m/s):0.23
% Radial velocity resolution(m/s):0.03
% Frame Duration(msec):1000
% RF calibration data:None
% ***************************************************************
sensorStop
flushCfg
dfeDataOutputMode 1
channelCfg 15 1 0
adcCfg 2 1
adcbufCfg -1 0 1 1 1
profileCfg 0 60 10 7 120.1 0 0 30 1 256 3750 0 0 30
chirpCfg 0 0 0 0 0 0 0 1
frameCfg 0 0 16 0 60 1 0
lowPower 0 0
guiMonitor -1 1 0 0 0 0 1
cfarCfg -1 0 2 8 4 3 0 15 1
cfarCfg -1 1 0 4 2 3 1 15 1
multiObjBeamForming -1 1 0.5
clutterRemoval -1 0
calibDcRangeSig -1 0 -5 8 256
extendedMaxVelocity -1 0
lvdsStreamCfg -1 0 0 0
compRangeBiasAndRxChanPhase 0.0 1 0 -1 0 1 0 -1 0 1 0 -1 0 1 0 -1 0 1 0 -1 0 1 0 -1 0
measureRangeBiasAndRxChanPhase 0 1.5 0.2
CQRxSatMonitor 0 3 19 125 1
CQSigImgMonitor 0 127 6
analogMonitor 0 0
aoaFovCfg -1 -90 90 -90 90
cfarFovCfg -1 0 0 12.00
cfarFovCfg -1 1 -0.23 0.23
calibData 0 0 0
sensorStart

any idea what i do wrong?

Johan Verburg de Carvalho