A large number of abnormal cell site problems are typically caused by the antenna system, cable and connecters, or both. It's important to have the right instrument available when either servicing or certifying cell sites for operation. The A434 RF master is the lightweight protable dianostic tool needed to accurately detect operational problems. The A434 RF master has all of the measurement functions necessary to accurately verify the site's antenna system from VSWR to power measurement. In addition, the A434 RF master makes distance-to-fault measurement to accurately pinpoint the fualt's location. Touch panel operation and a 7 inch wide TFT color display allows measurement to be easily made and displayed on the A434 RF master. Its application specific software allows for the user to easily compare and analyze measurement and generate professionals reports. A rechargeable and field installable lithium-ion battery for operating longer than three hours is part of the A434 Rf master.