Please advice to me!
How to measure and setup for the NF data of HMC966LP4E , and recommendations ?
Our customer measurement setup is following,
SG - Isolator - (LO) - D.U.T - (IF) - 90deg Hyb - NF meter - Noise source - isolator - (RF) D.U.T
SG:E8257C(keysight tech)>>>LO signal
RF FREQ:17.5GHz - 20GHz
LO FREQ:16.79GHz - 19.29GHz>>>SG input level is +6.5dBm
RF FREQ = LO FREQ + IF FREQ(710MHz)
Customer measurement NF data 3.2~4.6dB, is degraded than 2.5~3.5dB typ.
What are the precautions when measuring the NF of HMC966LP4E?
Noise spec of SG?
Bandwidth limitation of the input or output filter?
Can you provide a specific measurement system?