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IWR6843ISK: How to configure more than 4 frequencies

Part Number: IWR6843ISK


I want to configure 5 frequencies(60G, 60.32G,60.64G,60.96G,61.28G) in one frame. below is the config I have used.

sensorStop
flushCfg
dfeDataOutputMode 1
channelCfg 8 1 0
adcCfg 2 1
adcbufCfg 0 1 1 1
profileCfg 0 60 556 10 243 0 0 10.8 1 1024 4550 0 0 30
profileCfg 1 60.32 556 10 243 0 0 10.8 1 1024 4550 0 0 30
profileCfg 2 60.64 556 10 243 0 0 10.8 1 1024 4550 0 0 30
profileCfg 3 60.96 556 10 243 0 0 10.8 1 1024 4550 0 0 30
chirpCfg 0 0 0 0 0 0 0 1
chirpCfg 1 1 1 0 0 0 0 1
chirpCfg 2 2 2 0 0 0 0 1
chirpCfg 3 3 3 0 0 0 0 1
chirpCfg 4 4 3 320 0 0 0 1
frameCfg 0 4 1 0 20 1 0 
lowPower 0 0
guiMonitor 1 1 0 0 0 1
sensorStart
frameStart

However, according to the test results, the frequency of the fifth chirp is not realized. the fifth frequency is 60.96G. the parameter 320 of fifth chirpCfg has no effect. why?

I would like to know how to achieve 5 frequencies or more in one frame. 

Thanks.