Agilent 1950-04 free download

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HEWLETT' PACKARD JOURNAL T E C H N I C A L I N F O R M A T I O N F R O M T H E - h p - L A B O R A T O R I E S VOL. 1 No. 8 6LISHED BY THE HEWLETT-PACKARD COMPANY, 395 PAGE MILL ROAD, PALO ALTO, CALIFORNIA APRIL, 1950 Direct Measurement of Impedance in the 50-500 MC Range THE frequency range from 50 to 500 measuring almost any of the devices and megacycles, being too high for accurate components usually encountered in high- use of conventional bridges and too low for frequency work. In addition, the impedance economical construction of slotted line range of the bridge can be extended with equipment, has heretofore been a difficult some reduction in accuracy by using a known length of transmission line. region for measuring impedance. The usefulness of this new bridge in the The new -hp- Model 803A Bridge1 meas modern laboratory can hardly be over-em ures impedance with good accuracy over phasized. Measurements of impedance of this 50-500 me range. Measurements can be high-frequency components, connectors, ter made over the much wider range from ap minations, antennas, amplifier input circuits, proximately 5 to 700 me with relaxed accu and transmission lines are all possible with racy and reduced phase angle range. The the -hp- 803A. The operation of the instru bridge reads directly in impedance magni ment is so convenient that accurate measure tude over a range from 2 to 2000 ohms and ments can ordinarily be made at the rate of is also calibrated in impedance phase angle one per minute. In our laboratories, -hp- en at 100 me. Phase angles between