Power sensors to measure both the radio frequency (RF) power transmitted by radio equipment under test, and the RF power received the radio equipment under test, are mounted in a separate assembly (2) remote from the main means of power measurement and generation (1). The RF power sensors and other components in the remote assembly (2) are interconnected so as to allow measurement of both received and transmitted RF power at the Rf connector or connectors of the radio equipment under test (4). The main assembly and the remote assembly are connected by a flexible link (3).