5 Electricity and Magnetism 5.8 Inductance, Electromagnetic Oscillations, AC Circuits
Coupled resonant circuits
P2450201
Reciprocal resonance voltage as a function of the additional conductance, used to determine Gp.1. HF coil, 75 turns; 2. 150-turn coil.
Principle The Q factor of oscillating circuits is determined from the band width and by the Pauli method. In inductively coupled circuits (band-pass filters) the coupling factor is determined as a function of the coil spacing.
Digital Function Generator, USB, incl. Cobra4 Software
Tasks 1. Determine the dissipation factor t and k and the quality factor Q from the band width of oscillating circuits. 2. Determine the dissipation factor and Q factor of oscillating circuits from the resonant frequency , the capacitance Ctot and the parallel conductance Gp by the Pauli method. 3. Determine the coupling factor k and the band width of a band-pass filter as a function of the coil spacing s. 4. Analyse and verify the measurements using the measure analysis software. Function and Applications
What you can learn about ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪
Digital signal generator for use as a programmable voltage source in practical or demonstration experiments, particularly in the disciplines of acoustics, electrical engineering and electronics
Resonance Q factor Dissipation factor Bandwidth Critical or optimum coupling Characteristic impedance Pauli method Parallel conductance Band-pass filter Sweep
Benefits
Main articles Digital Function Generator, USB, incl. Cobra4 Software 25 MHz Digital storage oscilloscope with colour display, 2 x BNC cables l =75 cm incl. HF-coil, 35 turns, 75 micro-H HF-coil, 50 turns,150 micro-H HF-coil, 75 turns,350 micro-H Coil, 150 turns, short
13654-99
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11456-99 06915-00 06916-00 06917-00 06520-01
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▪ Can be used as universal stand-alone device or controlled via a USB interface ▪ Universally applicable thanks to broad, continually adjustable frequency range ▪ Usable as programmable voltage source via amplifier output ▪ Intuitive, menu-driven operation using control knob and function buttons, with help capability ▪ Illuminated monochrome graphic display for maximum visibility and readability ▪ Simple setting of voltage and frequency ramps in stand-alone mode ▪ Features V = f(f) output for easy reading of frequency in the form of a voltage - ideal for measuring circuit response to frequency ramps using an oscilloscope 13654-99
PHYWE Systeme GmbH & Co. KG · www.phywe.com 153