Download ThinkRF R5500/R5550 firmware 1.7.4 (which includes v1.7.3).
Refer to the instruction here for how to do a firmware update.
Fixed Defects
The following issues are fixed in this version:
Addressed SPP (samples per Packet) calculation and logic for when switching into decimation by 5.
Fixed capture engine that occasionally resulted in a capture stuck state.
Fixed some clock crossing domains issue with improvement to the timing of control messages.
Fixed occasional VRT packet corruption resulting in bad data packets
Refer to Release Notes for the full details.