what is network analyzer&applications?

Answer 1

This is from the occupational handbook
"Telephones and radios depend on a variety of equipment to transmit communications signals. From electronic switches that route telephone signals to their destinations to radio transmitters and receivers that relay signals from wireless phones, the workers who set up and maintain this sophisticated equipment are called radio and telecommunications equipment installers and repairers. These workers no longer just work on equipment that transmits voice signals, but also transmissions such as data, graphics, and video."