AWR2944EVM: Wrong ADC data streaming over LVDS using Demo

I use AWR2944EVM with DCA1000EVM to stream raw ADC data. Demo of SDK 4.2 is used. AWR2944 has 4 LVDS lanes, so DCA1000 is set to mode '1'.

The raw data stream contains 2 times more data per frame as expected:

numBytesPerChirp = numADCSamples * 2 #bytes
numBytesPerFrame = (numLoops * numRx * numTx) * numBytesPerChirp

The data payload looks like the following (each value is the integer repreesentation of 16 bit). From this, it looks like Lane 1 and Lane 2 contain correct varying numbers. Lane 3 is always zero. Lane 4 contains often -1 or orther values around that.

[-4   -163      0     -1   -273   -113      0    -25     81    237
      0     -2    195    221      0     -1   -248   -334      0   -131
   -309    111      0     -1    418    523      0     -1    308    128
      0     -1   -271   -371      0     -2   -288   -175      0  32766
   -213   -294      0     -1   -225     70      0 -16385    -85    -97
      0    -17   -152   -103      0     -2   -199   -363      0     -1]

Can it be, that the data in demo streamed only over 2 Lines? The other two are not valid. It would also explain why the number of bytes sent is doubled.

Config used:

sensorStop
flushCfg
dfeDataOutputMode 1
channelCfg 15 1 0
adcCfg 2 0
adcbufCfg -1 1 1 1 1
lowPower 0 0
profileCfg 0 77 626.66 5.80 40 0 0 96.03 1 128 4000 0 0 30
chirpCfg 0 0 0 0 0 0 0 1
frameCfg 0 0 128 1 128 239 1 0
lowPower 0 0
guiMonitor -1 0 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 0 0.5
calibDcRangeSig -1 0 -5 8 256
clutterRemoval -1 0
lvdsStreamCfg -1 0 1 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 1 0 1 0 1 0 1 0
measureRangeBiasAndRxChanPhase 0 1.5 0.2
aoaFovCfg -1 -90 90 -90 90
cfarFovCfg -1 0 0 8.92
cfarFovCfg -1 1 -1 1.00
extendedMaxVelocity -1 0
calibData 0 0 0
sensorStart

DCA  config:

{
  "DCA1000Config": {
    "dataLoggingMode": "raw",
    "dataTransferMode": "LVDSCapture",
    "dataCaptureMode": "ethernetStream",
    "lvdsMode": 1,
    "dataFormatMode": 3,
    "packetDelay_us": 25,
    "ethernetConfig": {
      "DCA1000IPAddress": "192.168.33.180",
      "DCA1000ConfigPort": 4096,
      "DCA1000DataPort": 4098
    },
    "ethernetConfigUpdate": {
      "systemIPAddress": "192.168.33.30",
      "DCA1000IPAddress": "192.168.33.180",
      "DCA1000MACAddress": "12.34.56.78.90.12",
      "DCA1000ConfigPort": 4096,
      "DCA1000DataPort": 4098
    },
    "captureConfig": {
      "fileBasePath": "C:\\dcarawdata",
      "filePrefix": "adc_data",
      "maxRecFileSize_MB": 1024,
      "sequenceNumberEnable": 1,
      "captureStopMode": "infinite",
      "bytesToCapture": 4000,
      "durationToCapture_ms": 4000,
      "framesToCapture": 40
    },
    "dataFormatConfig": {
      "MSBToggle": 0,
      "laneFmtMap": 0,
      "reorderEnable": 0,
      "dataPortConfig": [
        {
          "portIdx": 0,
          "dataType": "real"
        },
        {
          "portIdx": 1,
          "dataType": "complex"
        },
        {
          "portIdx": 2,
          "dataType": "real"
        },
        {
          "portIdx": 3,
          "dataType": "real"
        },
        {
          "portIdx": 4,
          "dataType": "complex"
        }
      ]
    }
  }
}