beasley_ch12_lecture
... Voltage reflection from open circuit is in phase, while from short circuit it is out of phase. Current reflection from open circuit is out of phase, while from short circuit it is in phase. ...
... Voltage reflection from open circuit is in phase, while from short circuit it is out of phase. Current reflection from open circuit is out of phase, while from short circuit it is in phase. ...
TEP 4.4.05 -01 Capacitor in the AC circuit LEP 4.4.05
... Set up the circuit as shown in Fig. 3 to display both terminal voltage and total current of the circuit. There are two major ways to measure the frequency-dependent phase shift between total current and terminal voltage. If, by means of the time-base control of the oscilloscope, one half-wave of the ...
... Set up the circuit as shown in Fig. 3 to display both terminal voltage and total current of the circuit. There are two major ways to measure the frequency-dependent phase shift between total current and terminal voltage. If, by means of the time-base control of the oscilloscope, one half-wave of the ...
Experiment - University of Guelph Physics
... 6. Regulator (optional) --- --- We don’t expect you to understand how the components work yet ( we’ll learn transistors later); we just want you to meet them experimentally. The regulator circuit is as shown below: it uses a Zener diode as a voltage reference (VZ = 5.5V), and a single transistor con ...
... 6. Regulator (optional) --- --- We don’t expect you to understand how the components work yet ( we’ll learn transistors later); we just want you to meet them experimentally. The regulator circuit is as shown below: it uses a Zener diode as a voltage reference (VZ = 5.5V), and a single transistor con ...
- Kewtech
... treated as a hazardous live part. 1.9 External earth probe. The tip is at mains potential (low current). Be careful to keep your hands behind the finger guard and make a firm and positive contact with the surface to be tested. Always keep your hands and fingers behind all finger guards on test leads ...
... treated as a hazardous live part. 1.9 External earth probe. The tip is at mains potential (low current). Be careful to keep your hands behind the finger guard and make a firm and positive contact with the surface to be tested. Always keep your hands and fingers behind all finger guards on test leads ...
Understanding speakers and ohms
... 8/3 ohms, or 2.67 ohms, and 4 speakers totaled 8/4 or 2 ohms. (What happens with 5, 6, or more speakers?)* Second, the 2:1 relationship between typical speaker impedance ratings allows for some equivalents when mixing different ratings. A single 4 ohm speaker is the equivalent of two 8 ohm speakers ...
... 8/3 ohms, or 2.67 ohms, and 4 speakers totaled 8/4 or 2 ohms. (What happens with 5, 6, or more speakers?)* Second, the 2:1 relationship between typical speaker impedance ratings allows for some equivalents when mixing different ratings. A single 4 ohm speaker is the equivalent of two 8 ohm speakers ...
Sampling Phase Detectors
... steady DC output or offset voltage. When the two signals are not exactly related, a different point on the microwave signal is applied to the IF filter each cycle, producing a sine wave with a frequency that is equal to the difference between the microwave signal's frequency and the frequency of the ...
... steady DC output or offset voltage. When the two signals are not exactly related, a different point on the microwave signal is applied to the IF filter each cycle, producing a sine wave with a frequency that is equal to the difference between the microwave signal's frequency and the frequency of the ...
Using a cathode ray oscilloscope (CRO) A CRO is a vital tool in the
... 14 Accurately draw the trace that you get on a piece of squared paper. 15 Repeat the measurement for two other tuning forks. Sheet 1 of 2 © Pearson Education Ltd 2011. Copying permitted for purchasing institution only. This material is not copyright free. ...
... 14 Accurately draw the trace that you get on a piece of squared paper. 15 Repeat the measurement for two other tuning forks. Sheet 1 of 2 © Pearson Education Ltd 2011. Copying permitted for purchasing institution only. This material is not copyright free. ...
DETERMINATION OF PLANCK`S CONSTANT USING LEDS (Rev 3
... 7. Calculate turn on voltage / c. Use c value in m/s. Plot turn on voltage / c versus 1/ wavelength. You will need to convert wavelength to meters before plotting. Do a least square line fit to obtain the slope. 8. The value of the slope = h. This is obtained from E=qV=eV=h x frequency +k = hc/wavel ...
... 7. Calculate turn on voltage / c. Use c value in m/s. Plot turn on voltage / c versus 1/ wavelength. You will need to convert wavelength to meters before plotting. Do a least square line fit to obtain the slope. 8. The value of the slope = h. This is obtained from E=qV=eV=h x frequency +k = hc/wavel ...
S - Parameter s - HP Memory Project
... invalid. S-parameters, on the other hand, are usually measured with the device imbedded between a 50n load and source, and there is very little chance for oscillations to occur. Another important advantage of s-parameters stems from the fact that traveling waves, unlike terminal voltages and current ...
... invalid. S-parameters, on the other hand, are usually measured with the device imbedded between a 50n load and source, and there is very little chance for oscillations to occur. Another important advantage of s-parameters stems from the fact that traveling waves, unlike terminal voltages and current ...
Standing wave ratio
In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide. Impedance mismatches result in standing waves along the transmission line, and SWR is defined as the ratio of the partial standing wave's amplitude at an antinode (maximum) to the amplitude at a node (minimum) along the line.The SWR is usually thought of in terms of the maximum and minimum AC voltages along the transmission line, thus called the voltage standing wave ratio or VSWR (sometimes pronounced ""viswar""). For example, the VSWR value 1.2:1 denotes an AC voltage due to standing waves along the transmission line reaching a peak value 1.2 times that of the minimum AC voltage along that line. The SWR can as well be defined as the ratio of the maximum amplitude to minimum amplitude of the transmission line's currents, electric field strength, or the magnetic field strength. Neglecting transmission line loss, these ratios are identical.The power standing wave ratio (PSWR) is defined as the square of the VSWR, however this terminology has no physical relation to actual powers involved in transmission.The SWR can be measured with an instrument called an SWR meter. Since SWR is defined relative to the transmission line's characteristic impedance, the SWR meter must be constructed for that impedance; in practice most transmission lines used in these applications are coaxial cables with an impedance of either 50 or 75 ohms. Checking the SWR is a standard procedure in a radio station, for instance, to verify impedance matching of the antenna to the transmission line (and transmitter). Unlike connecting an impedance analyzer (or ""impedance bridge"") directly to the antenna (or other load), the SWR does not measure the actual impedance of the load, but quantifies the magnitude of the impedance mismatch just performing a measurement on the transmitter side of the transmission line.