AD8348's noise figure

Question I would like to know how to test noise figure of AD8348. Can you give some idea about this? They would like to consider using AD8348 in mobile TV application. I also would like to know whether there is successful application already in this kind of application. Answer For testing the NF of AD8348, you can use any spectrum analyzer such as FSIQ, FSQ or any signal analyzer. 1. Test the noise floor of the analyzer itself. Noise floor should be dBm/Hz, suppose it is A1. 2. Test the noise floor of AD8348 at far frequency offset such as 20MHz offset, suppose it is A2. 3. Calculate the difference of above two, suppose it is A3=A2-A1. 4. According to different A3, using the attached excel form, get the calibration factor, suppose it is A4. 5. Calibrate the contribution of analyzer noise floor from the result of AD8348 noise floor, we get A5=A2-A4. 6. Calculate the NF of AD8348 using the formula NF=A5-(-174dBm/Hz)

AD8348 and ADL5387 maintains performance at low frequencies

Q. Is the performance of the AD8348 and ADL5387 maintained at low frequencies below the 50 MHz as specified on the datasheet? ---------------------------------------------------------------------------------------------------------------- A. The LO path on both the AD8348 and ADL5387 are DC coupled and because of this performance should be maintained as specified on the datasheet to below 1 MHz with a square wave LO. It is important to input a square wave LO for the fast rise and fall times.