[USRP-users] Fwd: Re: USRP's B210 sluggish start of transmission

Piotr Krysik perper at o2.pl
Fri Oct 6 16:32:55 EDT 2017


W dniu 06.10.2017 o 17:48, Nick Foster pisze:
> This is especially baffling to me, because I recall that the
> SKY13335-187LF switches used in B210 must be isolated from DC on all
> RF ports. But they are! The only components connected to the SMA
> connectors are a series 470pF capacitor.
>
> Perhaps the problem is exacerbated by poor impedance matching rather
> than by lack of a DC path. If reflected power was causing the problem
> I'd expect lowering the transmit gain to affect your results. Could
> you try that for me?
>
>
Nick,

There is no difference. Even for transmit gain 0 the problem persists.

I have a feeling that the answer to the question might be easier to find
if we know what is state of TX/RX switches before start of burst and
after it.

Best Regards,
Piotr Krysik




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