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
<address@hidden>
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.
It would be useful to see your .grc flow-graph files. Are you using
UHD, or "classic" (sorry if this has already been asked).