Communication Range of DWM1000

Hi Group,

I test the communication range of DWM1000s after configure them like Niklas configuration

Channel 5 (Question: when i configure receiver channel to 5, and transmitter channel to 1 or 4, they can communicate over different channels, is it possible or am i doing incorrect configurations?)
Prf DWT_PRF_16M,
datarate DWT_BR_110K
preamble 3
preamble length DWT_PLEN_1024
pacsize DWT_PAC32
sfd 1 (I don’t understant that, how can i configure sfd 1)
sfd timeout (1025 + 64 + 32) (when sfd timeout was (1025 + 64 - 32) like Niklas said, there was no communication, so i change it to (1025 + 64 + 32)

High power:
0x0E08281F, //16M prf power (smart tx is enabled)

My last successful range was 50m. My test board is above.
Do you have suggestions for increasing the range?
How can i test that the configurations are true?
Must i increase the tx power or disable smart tx power?
I think i make some mistakes!

Regards

Metin