tx_power_level

[cece]

Hi,

I am trying to decrease circuit power consumption that's why I am using sd_ble_gap_tx_power_set(TX_POWER_LEVEL) function. When I set TX_POWER_LEVEL as 4 or -20, I dont see any differences in terms of power consumption. Why is there no difference? Can anyone please help me with this. I am using multimeter to measure the current. I see the following in the spec

[Matt Barr]

You can definitely see a difference if you add a sense resistor to NRF51-DK and look at the voltage across the sense resistor with a differential probe. At 0 dBm:

At +4dBm:

At -8dBm:

A multimeter is most likely just showing you the average background current between advertising events. You might see some difference if you minimize the advertising interval, but a multimeter just isn't a very good way to see these differences.

[Asbjørn]

Very nice answer and I agree, you have to use an oscilloscope to see the differences in the short TX bursts.

[cece]

Thanks Matt, I changed as oscilloscope. it helped me resolve the issue