DTV reception with the FLEX400 board

Hi,

I have used the gr-atsc receiver and the TVRX to prove to track and
decode DTV/HDTV signals. I am trying to do the same thing with the
RFX400 board, although I am running into trouble. There is an
available signal at 491 MHz, which works fine when I record data with
the TVRX, but the RFX400 does not seem to produce data that the gr-
atsc receiver can decode properly. Note that I’ve looked at the DTV
spectrum using the RFX400, and it looks reasonable. Are there any
considerations I’ve overlooking in terms of hardware differences
between the RFX400 and the TVRX? I don’t believe I have to change
anything in the gr-atsc receiver, assuming I’m using the same
decimation rate (10), properly setting the gain (which needs to be
set to a lower value on the RFX400), and properly centering the
signal. Is this assumption incorrect? Are there software
modifications that are required for the gr-atsc receiver?

Regards,
Brent


Brent M. Ledvina
Assistant Professor
Bradley Department of Electrical and Computer Engineering
Virginia Tech
Blacksburg, VA 24061
ph: 540.231.0656
Office Hours: T 1-3, W 11-12

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