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learn:instrumentation:tutorials:ad2-impedance-analyzer:start [2018/06/12 22:46]
Alex Wong [Using the Impedance Analyzer]
learn:instrumentation:tutorials:ad2-impedance-analyzer:start [2018/06/15 21:45] (current)
Alex Wong [Inventory]
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 ====== Using the Impedance Analyzer ====== ====== Using the Impedance Analyzer ======
-The total counteractive force to the flow of electrons through a system is known as impedance. This can be abstractly thought of as the resistance of the circuit and can be measured with an impedance analyzer.__ But why is a fancy tool required to measure impedance and not just a digital multimeter?​__ ​The reality is that no real components, resistors, capacitors, or inductors, are purely resistive or reactive. Every component in existence is a combination of R, C, and L aspects; the unwanted aspects are called parasitics. ​+The total counteractive force to the flow of electrons through a system is known as impedance. This can be abstractly thought of as the resistance of the circuitand can be measured with an impedance analyzer. The reality is that no real components, resistors, capacitors, or inductors, are purely resistive or reactive. Every component in existence is a combination of R, C, and L aspects; the unwanted aspects are called parasitics. ​
  
-At low frequencies and in simple applications these parasitics can usually be safely ignored, but in high speed applications or setups with specific frequency requirements,​ these parasitics need to be accounted for. The Impedance Analyzer tool from Waveforms will provide a variety of information about the load under test from the impedance, admittance, inductance, capacitance,​ phase, and quality factor of the system. This is ideal for designing filters with tight specifications and matching impedances. It is available in the WaveForms software (version 3.6.8 or newer) for the original Analog Discovery, the Analog Discovery 2, and the Electronics Explorer board.+At low frequencies and in simple applications these parasitics can usually be safely ignored, but in high-speed applications or setups with specific frequency requirements,​ these parasitics need to be accounted for. The Impedance Analyzer tool from Waveforms will provide a variety of information about the load under test from the impedance, admittance, inductance, capacitance,​ phase, and quality factor of the system. This is ideal for designing filters with tight specifications and matching impedances. It is available in the WaveForms software (version 3.6.8 or newer) for the original Analog Discovery, the Analog Discovery 2, and the Electronics Explorer board.
  
-**This tutorial will go through the available settings and controls available on the GUI and measuring a simple low pass filter. ​ +**This tutorial will go through the available settings and controls available on the GUI, and and example ​measuring a simple low pass filter. If you are using the Analog Discovery Impedance Analyzer ​add-on board the reference resistances are already loaded on the board. After selecting the reference resistor ​value in the software the Impedance Analyzer tool from Waveforms will use both Oscilloscope channels, Waveform Generator one, and the digital ​inputs and outputs ​in order to control the hardware**
-If you are using the Analog Discovery Impedance Analyzer ​the differences you will sense are that the reference resistances are already loaded on the board and after selecting the correct ​value in the software the Impedance Analyzer tool from Waveforms will take over the OscilloscopesWaveGen 1 and and the digital ​IOs in order to control the hardware**+
  
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 ==== Inventory ==== ==== Inventory ====
   * [[http://​store.digilentinc.com/​analog-discovery-2-100msps-usb-oscilloscope-logic-analyzer-and-variable-power-supply/​|Analog Discovery 2]]   * [[http://​store.digilentinc.com/​analog-discovery-2-100msps-usb-oscilloscope-logic-analyzer-and-variable-power-supply/​|Analog Discovery 2]]
-  * include link too the impedance analyzer ​website(Optional) FIXME+  * [[https://​store.digilentinc.com/​impedance-analyzer-for-analog-discovery/​ |Impedance Analyzer Add-on Board]]
   * [[http://​store.digilentinc.com/​waveforms-2015-download-only/​|WaveForms software]] (version 3.6.8 or newer is required)   * [[http://​store.digilentinc.com/​waveforms-2015-download-only/​|WaveForms software]] (version 3.6.8 or newer is required)
   * A computer with a USB port   * A computer with a USB port
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 ===== Setting Up the Circuit ===== ===== Setting Up the Circuit =====
-The Impedance Analyzer tool from Waveforms accepts two different arrangements for the load of interest and the reference resistor. In both cases the first WaveForm Generator tool (WaveGen 1) as well as the positive inputs of both Oscilloscope inputs are used; the WaveForm Generator and the Oscilloscope tools will be shown as //Busy// when the Impedance Analyzer is in use. The two physical arrangements for the impedance analyzer are shown in the two images below:+The Impedance Analyzer tool from Waveforms accepts two different arrangements for load of interest and the reference resistor. In both cases the first WaveForm Generator tool (WaveGen 1)as well as the positive inputs of both Oscilloscope inputsare used; the WaveForm Generator and the Oscilloscope tools will be shown as //Busy// when the Impedance Analyzer is in use. The two physical arrangements for the impedance analyzer are shown in the two images below:
  
 {{learn:​instrumentation:​tutorials:​ad2-impedance-analyzer:​impedance.connection.last.png?​500 |Load First}} {{ learn:​instrumentation:​tutorials:​ad2-impedance-analyzer:​impedance.connection.first.png?​500 |Resistor First}} {{learn:​instrumentation:​tutorials:​ad2-impedance-analyzer:​impedance.connection.last.png?​500 |Load First}} {{ learn:​instrumentation:​tutorials:​ad2-impedance-analyzer:​impedance.connection.first.png?​500 |Resistor First}}
  
-__When using the Analog Discovery ​impedance Analyzer you have by default ​the Load First arangement. For more details check the device [[https://​reference.digilentinc.com/​reference/​add-ons/​impedance-analyzer/​reference-manual|Reference Manual]]__+The Impedance Analyzer for Analog Discovery ​add-on module has the load first arrangement on the board. For more details check the device [[https://​reference.digilentinc.com/​reference/​add-ons/​impedance-analyzer/​reference-manual|Reference Manual]]
  
 To get a clean impedance measurement,​ different reference resistors are recommended based on the capacitance and inductance of the load: To get a clean impedance measurement,​ different reference resistors are recommended based on the capacitance and inductance of the load:
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 {{:​learn:​instrumentation:​tutorials:​ad2-impedance-analyzer:​13_-_Farad.png?​400|Farad view}} {{:​learn:​instrumentation:​tutorials:​ad2-impedance-analyzer:​13_-_Farad.png?​400|Farad view}}
  
-//​Dissipation//​ - Shows the dissipation energy ratio of real impedance to imaginary impedance+//​Dissipation//​ - Shows the dissipation energy ratio of real impedance to the imaginary impedance
  
 {{:​learn:​instrumentation:​tutorials:​ad2-impedance-analyzer:​14_-_dissipation.png?​400|Dissipation view}} {{:​learn:​instrumentation:​tutorials:​ad2-impedance-analyzer:​14_-_dissipation.png?​400|Dissipation view}}