Anritsu FAQs
Why is my S251 clicking at me when I try to use the bias-Tee?
Something is violating our specifications (typically over-current), causing the bias-tee to shut off. After a second or so, the bias tee will try to come back on. If the violation still exists, it will shut off again, and continue the cycle until the violation is removed. The clicking is the relay changing states.