Re: [Discuss-gnuradio] trouble with gr_multiply_const_ff

[atools_cook]

lan

I have done some research work. The input values of uhd should be -1<=x<1,
and the gr_multiply_const_ff block has set the default amplitude to 1, so
this block seems useless. 

The only way I found to scale the power of signal we transmit is to enhance
the gain of usrp_sink. However, we use RFX900 d'board  as it has a bigger
gain range (0~70dB), and RFX900 doesn't provide a adjustment tx gain. In
other words, the tx.set_gain() and tx.get_gain() can't work at all. Did the
RFX900 set the maximum gain value as  tx_gain default value, It could also
be 70dB, right?

Is there any other way to scale the transmit signal power with uhd?

best.
Lee

 



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