Add System Time

Adds system time to a PDU's metadata.

This block adds a user specified key to PDU dict containing the boost system time in seconds since unix epoch (00:00:00 UTC on 1 January 1970).

Caveats
Note that the computer's clock that this time comes from is in general not synchronized to the sampling clock of the SDR you might be using. That means, for example, that the timestamps for two PDUs that are (logically) N samples apart do not necessarily differ by N/(sample rate). The notion of different devices with different clocks of time is not deterministic!

Parameters
(R): Run-time adjustable


 * Key
 * default: "system_time"

Inputs

 * pdu
 * input message

Outputs

 * pdu
 * output message

Example Flowgraph
This flowgraph can be found at



Source Files

 * C++ files
 * TODO


 * Header files
 * TODO


 * Public header files
 * TODO


 * Block definition
 *