Re: [Discuss-gnuradio] GMSK MODULATOR output different after modulation and according to UHD_FFT

[Adeel Anwar]

Jay,

As per my experience with USRP-N210 and RFX2400, if gain setting are high and this causes signal amplitude to be > -20/30 dBm  then the received signal will be distorted.

To overcome this

 1. Reduce Rx-Gain

 2. OR Reduce Tx-Gain

 3. OR Increase distance between USRP

This distortion maybe due to USRP ADC saturation at signal >-20/30dBm but i am not sure. Maybe someone from Ettus-Research may comment on it

On Wed, Jun 12, 2013 at 4:27 PM, Jay Prakash <address@hidden> wrote:

Sorry,Solved.

There was gain settings problem.

Sometimes gain issues do arrive as I saw.

I powered off the devices,changed gain after analyzing best response of uhd_fft for a normal random source gmsk modulated signal.

It's performing fine now

Jay Prakash 

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