Dear Specialist,
Do you have channelto channel isolation testing guaidance documents can be shared, how to configure the control signal.
We try to test it with our experience but the result is quite different with the discription from datasheet.
Below is our test procedure,
1) set power tree for below ports, for unused ports such as Term-CHA, Term-CHB, tie to 50Ω load.
Pin |
Setting |
VDD1-CHA |
5V |
VDD1-CHB |
5V |
VDD2-CHA |
5V |
VDD2-CHB |
5V |
SWVDD-CHAB |
5V |
SWCTRL-CHAB |
0V |
BP-CHA |
0V |
BP-CHB |
0V |
PD-CHAB |
0V |
2) ADRF5515 work in High Gain mode,
VNA Port1 conncet to ANT_A, Port 2 connect to RXOUT-CHA and get the result A;
VNA Port1 conncet to ANT_A, Port2 connect to RXOUT-CHB then get the result B,
B-A is RXOUT-CHA to RXOUT-CHB isolation as below, in the datasheet the normal value is 45db.