SFD timeout errors

Hi there, I am new to UWB and need some help understanding if the SDO timeout frequency I observe is expected or “normal”.

I did a test on a DW1000 with the receiver being reenabled after every error and measured the average SFD timeout period. There are no transmitters in range (hopefully), so the air is “silent”. Under those conditions I get an SFD timeout on average every 7 seconds with this configuration:

dwt_config_t config = {
2,
DWT_PRF_64M,
DWT_PLEN_1024,
DWT_PAC32,
9,
9,
1,
DWT_BR_110K,
DWT_PHRMODE_EXT,
(1024 + 1 + 64 - 32)
};

But measured an average 0.15s between SDF timeouts with this configuration:

dwt_config_t config = {
4,
DWT_PRF_64M,
DWT_PLEN_2048,
DWT_PAC64,
20,
20,
1,
DWT_BR_110K,
DWT_PHRMODE_EXT,
(2048 + 1 + 64 - 64)
};

Is this expected?