The following components are used to measure power output of a 2 kW TWT amplifier TWT Low pass/High pass filter Low power 20 dB attenuator 40 dB directional coupler with matched load Power meter. The correct sequence of connections of these components is:

• 1, 4, 2, 3, 5
• 1, 3, 4, 2, 5
• 1, 2, 4, 3, 5
• 1, 4, 3, 2, 5