Re: [Discuss-gnuradio] packet_loopback_hier.grc

[Cinaed Simson]

I noticed a difference in the constellation symmetries for the header
and the payload.

If I recall correctly, the header was set to digital.psk_2() and the
payload was digital.psk_4().

I changed them both to be psk_4 and it appears to have cleaned it up.

It looks like someone was making changes for testing and missed an entry
backing out of the changes.

-- Cinaed

On 10/27/2018 03:16 PM, J Nicholas Laneman wrote:
> Hi All,
> 
> I am tinkering with the “packet” example code, specifically 
> packet_loopback_hier.grc from .../share/gnuradio/examples/digital/packet/, on 
> a Lenovo laptop running Ubuntu 18.04 LTS and GNU Radio 3.7.13.4 installed via 
> PyBOMBS.
> 
> Strangely, when I run the flow graph out of the box, I see the following log 
> error once in a while:
> 
> gr::log :INFO: header_payload_demux0 - Parser returned #f
> 
> Also strangely, the flow graph simply stops running after transmitting about 
> 1200 PDUs.
> 
> Note that I have observed these issues on Ubuntu 16.04 LTS installed on the 
> laptop as well as a desktop, as well as an iMac running OS X.
> 
> Can anyone comment on the level of maturity of these examples and the blocks 
> they rely upon?
> 
> 
> Regards,
> Nick Laneman
> University of Notre Dame
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