About VSWR Bridge Specification.

Hi

I don't know specification of vswr bridge.

If vswr bridge has 3 ports(signal port, DUT port, reflected port), how to check coupling and directivity value?

For Example, specification of vswr bridge
1. Insertion Loss
- Signal Port -> DUT Port : 9dB
- Signal Port -> reflected port : 17dB
- DUT Port -> reflected port : 16dB

2. Refelection Loss
- Signal Port : 25 dB
- Reflected Port : 20 dB
- DUT Port : 20 dB

3. Coupling : 16 dB ?-> How to check? Please explain.
4. Directivity : 25 dB ? -> How to check? Please explain.

Thanks.