Re: [Discuss-gnuradio] Problem using the dbs card

[Matt Ettus]

Marcus Leech wrote:
> When I first got my DBS_RX card, I plugged it into a low-noise
> amplifier, and tuned it to the
>  GPS L1 frequency, with a circular waveguide feedhorn on the front of
> the LNA.  As expected
>  the GPS L1 carrier appeared in the fft display.  Placing a sheet of
> metal in front of the feedhorn
>  caused the L1 blip to go away.
> 
> Around this time (I got an early DBS_RX card), there was some concern
> about some resistor values in
>  the amplifiers used between the MAX2118 and the A/D.  Some values
> caused "deafness".  Matt had
>  published instructions on how to fix the problem yourself--assuming a
> steady hand, and excellent
>  eyesight.  I think I've seen rotoviruses that were larger than some of
> the components on modern
>  hardware :-) :-)
> 
> But I never saw the "deafness" problem, so I never bothered to implement
> the "fix".


ALL units (except for the ones Marcus has) have this fix.

Matt