but snce all data is received in binary, this is slightly confusing. Des this mean that BIN receives the value of a byte directly, wheras DEC interprets the value of each byte as an ASCIIcode and then converts to a single binary value (i.e receives ASCII code for 3 and 2, then stores 32 in a byte)
yes! All modifier explanation in the SERIN2 section in the PBP manual (p134-135)