CC1200: Noise vs Gain

Could you please elaborate some on what you would use a graph like this for?

Gain - Do you mean front end gain? 

Hi TER,

Yes. The Rx gain.

Best regards,

Franz

I don't believe we have a graph that shows noise (which noise?) vs front end gain.

Typically the AGC is on meaning that the gain is set according to the input signal. To get the best possible sensitivity the AGC always starts with max gain. 

Could you please elaborate some on what you would use a graph like this for? I assume the customer has requested this graph for some reason and knowing that reason would help covering what the customer needs to know. 

Hi TER,

Sorry for the late response.

The customer wants to add an LNA upfront the CC1200 to improved the sensitivity. To make a good analysis the need the noise figure VS the gain of the CC1200.

Best regards,

Franz

Hi TER,

Thank you for your help.

My customer asked if RX AGC gain in function of the RX level? Also, is the measurement above done it actual boards?

Best regards,

Franz

Yes, the AGC gain is a function of input level. AGC_REF sets the level where the AGC start to reduce gain. 

Yes, these are measurements done on multiple actual boards.