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Need clarification of the Noise specs listed for HMC900LP5E

Question asked by ljakahi on Jun 25, 2015
Latest reply on Jun 30, 2015 by jdobler

Hello,

 

I am inquiring about the NOISE FIGURE specs as seen on page 3-2 of the datasheet.  There seems to be some testing conditions listed as 100 ohm SOURCE and 1Kohm SOURCE in the parenthesis.  What do these parameters refer to?  For instance, for the Noise figure of 25dB (minimum gain), does this mean that the device had a 100ohm resistor across its INPUT pins when this noise measurement was taken?

 

Similarly, for the Noise figure of 19dB (minimum gain), does this mean that the device had a 1Kohm resistor across its INPUT pins when this noise measurement was taken?


I wish that there was a pix of the test condition when these parameters were determined or at least a better description of what is meant by "100ohm Source" / "1Kohm source".  


Please assist.

Thanks



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