Re: [Discuss-gnuradio] Controlling File Sink

[Martin Braun]

On 12.03.2015 11:36, Richard Bell wrote:
> Hello all,
>
> In GRC, I've set up a packet detector that is working using the Header
> Payload Demux block. Unexpectedly, however, it seems the payload output
> port does not go silent when no header is detected. It outputs zeros,
> which the file sink block I have connected to that port then stores.

Richard,

the HPD does *not* output zeros between bursts. It will send out 
whatever the header return message tells it to output. Check the OFDM 
examples for how these things happen. You can add message probes to see 
what exactly is encoded by the messages.

M