Abstract: A device with at least one channel for measuring high dynamic range, radio frequency (RF) power levels over broad-ranging duty cycles includes a power sensor circuit comprising at least one logarithmic amplifier; at least one directional RF coupler electrically connected to the at least one power sensor; at least one RF attenuator electrically connected to the at least one RF coupler; and at least one sampling circuit electrically connected to the at least one RF attenuator and the at least one RF coupler. The at least one sampling circuit performs analog-to-digital conversion of electrical signals received to provide digitals signals for measuring the RF power level in the at least one channel.

Abstract: A system for measuring nuclear magnetic resonance spin-lattice relaxation time T1 and spin-spin relaxation time T2 of a sample includes a source of a substantially uniform magnetic field B0 for immersing at least a portion of the sample; a nuclear magnetic resonance excitation and detection system constructed and arranged to excite at least a portion of the sample with a plurality of nuclear magnetic resonance pulse sequences, each applied with a repetition time that is preselected to be sensitive to a T1 value of at least a portion of the sample, and to detect nuclear magnetic resonance emissions from the sample in response to excitations to provide a plurality of detection signals; and a signal processing system configured to communicate with the nuclear magnetic resonance excitation and detection system to receive the plurality of detection signals.

Abstract: A device with at least one channel for measuring high dynamic range, radio frequency (RF) power levels over broad-ranging duty cycles includes a power sensor circuit comprising at least one logarithmic amplifier; at least one directional RF coupler electrically connected to the at least one power sensor; at least one RF attenuator electrically connected to the at least one RF coupler; and at least one sampling circuit electrically connected to the at least one RF attenuator and the at least one RF coupler. The at least one sampling circuit performs analog-to-digital conversion of electrical signals received to provide digitals signals for measuring the RF power level in the at least one channel.