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Re: [USRP-users] UBX 10-500 MHz Question

BP
Brian Padalino
Wed, Apr 8, 2020 9:55 PM

On Wed, Apr 8, 2020 at 5:49 PM Tillson, Bob (US) via USRP-users <
usrp-users@lists.ettus.com> wrote:

so with the UBX-160 on an X310, there is the following caveat:

  • The UBX 160 transmitter path has 160 MHz of bandwidth throughout the
    full frequency range of the device; the receiver path has 84 MHz of
    bandwidth for center frequencies from 10 MHz to 500 MHz.

I guess my question is how does this manifest itself?

Check the schematic block diagram:

https://files.ettus.com/schematics/ubx/ubx.pdf

If I ask for 100 MHz of BW, do I get 84 or does it fail?

How would I get 84 given the requirement of sample rate be an even divisor
of 200 MHz clock?

If I wanted 100 in that range, would there be any way to get it from a
single channel in that band?  Most other cards don’t seem to have the BW in
that range.

It shouldn't fail, and you will just get filtered output.  They're just
analog filters in the signal path.

Brian

On Wed, Apr 8, 2020 at 5:49 PM Tillson, Bob (US) via USRP-users < usrp-users@lists.ettus.com> wrote: > so with the UBX-160 on an X310, there is the following caveat: > > > > * The UBX 160 transmitter path has 160 MHz of bandwidth throughout the > full frequency range of the device; the receiver path has 84 MHz of > bandwidth for center frequencies from 10 MHz to 500 MHz. > > > > I guess my question is how does this manifest itself? > Check the schematic block diagram: https://files.ettus.com/schematics/ubx/ubx.pdf > > > If I ask for 100 MHz of BW, do I get 84 or does it fail? > > > > How would I get 84 given the requirement of sample rate be an even divisor > of 200 MHz clock? > > > > If I wanted 100 in that range, would there be any way to get it from a > single channel in that band? Most other cards don’t seem to have the BW in > that range. > It shouldn't fail, and you will just get filtered output. They're just analog filters in the signal path. Brian