Amplitude is not changing on the receiver side

I am trying to transmit square wave using USRP 2920. If I change the amplitude of square wave in Tx file from 1 to lets say 100. The Tx waveform shows that it is changed but on the receiver side there is no change in the amplitude. Can any body look at my files and guide me why I am not able to see increase in amplitude on Rx file when I increase the amplitude of Square wave on Tx file
Note: I am generating a randon number between 0 to 1. If random no. is greater than 0.5 then the amplitude is 1 or higher but if the random no. is less than 0.5 amplitude will be zero.
Thanks 
JK
Attachments:
TX.vi ‏23 KB
RX.vi ‏34 KB

Your not going to get a clean squarewave back on the receive side. The USRP uses a local oscillator (LO) so anything it reads will be interpreted as sinusoidal in nature. This is evedent in the screen shots in the attached .zip folder. 
To address your voltage question, assuming your antenna is terminated with a characteristic impedance of 50 Ohms (Zo) and the max power of 100 mW, Power = (approximately) Voltage^2 / Zo
Therefore Voltage = ( Power * Zo ) ^ (1/2) = 2.2 Volts approximately. 
What is your overall application? Why are you concerned about the voltage? What are you testing?
Brad S.
Application Engineering
National Instruments
Attachments:
USRP.zip ‏216 KB

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