DC DC tag ble scanning performance

[Yashodhan]

Hello,

  We are testing  ble beacon based on nRF52832. We have incorporated DC-Dc in our design. The design has fractus antenna. Our previous design was without DC-DC. Now te observation is when we are scanning the tags it has been observed that the ble tags with dc dc gets scanned with a delay than without dc  dc. What could be reason for that. The scanning is done on nrfconnect.

[Kenneth]

So the only difference you do is that you call sd_power_dcdc_mode_set() with or without NRF_POWER_DCDC_ENABLE?
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v6.1.1/group___n_r_f___s_o_c___f_u_n_c_t_i_o_n_s.html#ga84bd6a0e8f55a7aa85a5ec608edd61fe

Do you have any on-air sniffer logs for comparison?
https://infocenter.nordicsemi.com/topic/ug_sniffer_ble/UG/sniffer_ble/intro.html 
https://www.nordicsemi.com/Software-and-tools/Development-Tools/nRF-Sniffer-for-Bluetooth-LE/Download#infotabs 

How big is the delay?