Questions about the Default Header Format Obj.

[Barry Duggan]

The packet example in https://github.com/gnuradio/gnuradio/blob/master/gr-digital/examples/packet/tx_stage3.grc uses a Default Header Format Obj. which describes a header as

    | access code | pkt len  | pkt len  |

In that example, the access code is '10101010111101010101' which is bits in network order.

An output of the example produced:

***** VERBOSE PDU DEBUG PRINT ******

()

pdu length = 6 bytes

pdu vector contents =

0000: f0 5a 00 14 00 14

************************************

***** VERBOSE PDU DEBUG PRINT ******

()

pdu length = 20 bytes

pdu vector contents =

0000: 2f 68 7d 75 72 7c a5 cb b5 eb c1 ce 46 b4 ae 00

0010: 6f 20 b1 14

************************************

So my questions are:

1) How does the access code of 20 bits get translated into the 'f0 5a' of 16 bits?

2) The Parameters of the Default Header Format Obj. include 'Threshold' and 'Payload Bits per Symbol'. Where are those values in the header output?

Thanks,

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Barry Duggan KV4FV

https://github.com/duggabe