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This video shows employment in a 1970s spectrum analyser HP, capable of measurements to 110 MHz, a assessment of "loss" of antenna.
Spectrum analyser system in 8552B 141T if and RF sections 8553B (plug in), and a connection through a cable Assembly, HP p/n 08443-60009 (see http://www.glkinst.com/cables/cable_p ... The HP 8443A trace generator "(early version tube Nizi) 8443A allows to specify the frequency operator any position along the track by Mark also provides the DUT signal incident RF (antenna) through the 8721A bridge. It was the latest of the era and how to do Web analysis using spectrum analyser "141T this. These special units were built at HP in Santa Rosa, California.
8721A uses bridge for separating signal mirror reference accidents and then measure the amplitude signal reflecting changes over sweeping frequency. See application note HP 150 3 available in HP memory project website, http://www.hpmemory.org/ressources/re ... For more information.
Note: 8721A bridge labels appear on both sides but differently. Download the source connection label on the other side, the incident actually reflects the aobositili, the source of the load on the other side. I had Setup for measuring reflect but to face the table! Darn! Oh!)
SA set for bandwidth 300 MHz, 5 MHz scanning width of each Division, ease entry in 20 dB time scanning or overwhelming each of 5 milliseconds. The continued ability of CRT SA, allows the operator to set very slow scan times to more accurately and improve the accuracy of measuring capacity and keep the results of the trace flag is passed from one side to another. Note the aossilosobi voltage fluctuations as each scan.
Reference line is the top graticule CRT at 0 dB. Lost return 50.172 MHz (band 6 sqm) with G5RV antenna made 102 (31.0896 m) was about-58 dB (sur = 1.00252102460553) assuming the analyst spot on calibration. AT2K antenna tuner used for scenes to peak resonance melody.
Return loss:
Return loss-ratio of logarithmic voltage reflected incident to your probation. Return loss can be derived from the refractive index of linear (gamma) by using the following equation: log | = 20 RLGamma|
Return loss of dB [Infinity] corresponding to no reflection, whereas loss return DB 0 corresponds to kmbliti reflection.
Voltage standing wave ratio (sur):
Or a perm is relative maximum voltage standing wave. 1 corresponds to no reflection, whereas the subsidiary koribonds (infinity).
Enjoy!
73!