Let me give you the details this time. sorry for the confusion. USRP - The first version Daughterboard - RFX2400
The signal source has the following settings. 1. Sample Rate - 1Msps 2. Waveform - Sine & Complex 3. Frequency - 100kHz 4. Amplitude - 10 5. Offset - 0 This source is connected to the USRP Sink directly. There is no other block in between and not even a throttle. USRP sink settings: 1. Interpolation - 128 2. Frequency - 2.5GHz 3. Gain (dB) - 30 4. Side - A (Tx/Rx) The USRP is connected fine and works well with benchmark_tx/rx tests. On the receiver side I use a GRC flowgraph with USRP sink and FFT block only. USRP Sink: 1. Decimation - 64 2. Frequency - 2.5GHz 3. Gain (dB) - 10 FFT sink has proper settings too. I am not using any filters as I hope the SNR is high enough. Thanks On Mon, May 16, 2011 at 3:47 PM, Marcus D. Leech <[email protected]> wrote: > On Mon, 2011-05-16 at 15:34 -0500, John Andrews wrote: >> >>> I am running it at 2.5GHz. >>> >> What magnitude are the samples you're feeding into the USRP sink? >> >> --n >> >> Also, by default the RFX2400 has a TX filter that's centered at 2.441GHz > and about 85Mhz wide at the 3dB points. So, there'll be some attenuation > at 2.5GHz, roughly 6-8dB or so. > > >
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