This is a great troubleshooting tool. The lower connector or "test" connector tests the coax from the meter to the receiver.
Use the meter at the dish. Dis-connect the coax from the LNBF and connect it to the lower connector of the meter. Power your receiver on. If the "Test" light is on, it means the coax from the dish to the receiver is in good shape. If the "Test" light is off, it means there is a problem with the coax, connectors, etc. Check the coax and connectors before you proceed.



