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nRF51822 PTX mode, How to reduce current consumption

Dear Sirs,

I'm using nRF51822 EVKit and using example code "button_radio_example" for pca10001 device and measured current consumption on this PTX device and found out it takes about 4ms, 5mA current consumed before radio starts.

image description

Above scan shows timing from System Reset to 8bytes payload TX. My question is how can I reduce Startup time(its 4ms now) before radio starts and how can I reduce current consumption during this Startup time.

My application is just to send 8bytes payload to PRX device every 0.5 sec but problem is too much current consumption as I have use 150mA coincell battery to run this PTX device and last battery lifetime for about 2 years working.

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