Re: [Discuss-gnuradio] Boosting Output RMS Power of BasicTX Daughterboard

[Michael Skaggs]

1 MHz signal with a 6.25MSps rate. We just attempted a signal at 5MHz and measured it at 114mV RMS, a 10MHz signal is 56mV RMS. The voltage seems to drop as the signal frequency rises. Does this assure a hardware issue? Or is there something else we can check?

Thanks,

Michael

On Fri, Dec 23, 2016 at 10:44 AM, Marcus D. Leech <address@hidden> wrote:

On 12/23/2016 10:26 AM, Michael Skaggs wrote:

Hi all,

We're currently working with a BasicTX daughterboard attached to a N210 USRP. We are using both outputs of the BasicTX in quadrature (I on one channel, Q on the other). The problem we are running into is that the output power of the BasicTX board seems very low. Looking at it on an o-scope, we are seeing around 166mV RMS on each channel, which seems lower than we would expect.

We are using GNURadio Companion to transmit these waveforms, and it is a very simple setup. A single "Signal Source" block generating a sine wave into a "UHD: USRP Sink" block. The "amplitude" value is at it's near max without clipping in the ADC and since the daughterboard has no gain elements, "gain" does nothing, so we're kind of at a loss here.

Any help is appreciated.

Thanks,

Michael

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What frequency?

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