Re: [Discuss-gnuradio] where the carrier frequency is set

[Matt Ettus]

Michael Ford wrote:

>  Eric has already told me once that this is crazy, but I can't see any
>  other way to do this. When Matt told me that the RSSI circuit
>  measures interference +/-15Mhz from the carrier,

The RSSI reads the power in the analog baseband signals (power(I) + 
power(Q)).  The analog baseband will contain signals from approximately 
+/- 15 MHz from the LO frequency.  The LO frequency is set automatically 
when you set the frequency of reception.  The LO is a multiple of 2 or 4 
MHz depending on which RFX board you have.  You can change that to be a 
multiple of 1 MHz, but you will have worse phase noise.  The lo_offset 
also needs to be taken into account. 

Matt