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AWR1243: What is the lower limit of Frame Periodicity?

Part Number: AWR1243

Hi,

I set  Frame Periodicity = 200us,system report en error:Frame ON time < Frame periodicity */

I change  Frame Periodicity = 300us, no problem,so what is the lower limit value of Frame Periodicity?

I use the follow setting:

chirpStartIdxFCF=2;
chirpEndIdxFCF=2;
frameCount=0;
loopCount=2;
periodicity=40000;
triggerDelay=0;
numAdcSamples=256;
triggerSelect=1;

chirpStartIdx=2;
chirpEndIdx=2;
profileIdCPCFG=0;
startFreqVar=0;
freqSlopeVar=0;
idleTimeVar=0;
adcStartTimeVar=0;
txEnable=1;

profileId=0;
startFreqConst=1468272583;
idleTimeConst=200;
adcStartTimeConst=249;
rampEndTime=946;
txOutPowerBackoffCode=0;
txPhaseShifter=0;
freqSlopeConst=152;
txStartTime=0;
numAdcSamples=256;
digOutSampleRate=37500;
hpfCornerFreq1=0;
hpfCornerFreq2=0;
rxGain=30

  • Helli Min,
    You need to calculate the total chirping (active frame) time out of total frame periodicity, it should be less that total frame periodicity.
    (rampEndTime*10 + idleTimeConst*10)*(chirpEndIdx-chirpStartIdx+1)*loopCount < framePeriodicty; where min. framePeriodicity is [200usec+1chirp period].

    Regards,
    Jitendra