The Design and Testing of Multirange Receivers
- 1 June 1935
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 23 (6) , 578-592
- https://doi.org/10.1109/JRPROC.1935.226392
Abstract
The principal difficulties in the design of high-frequency receivers reside in the complexity of the multirange circuits. Several ctrcuits and a unit assembly arrangement are described which improve the frequency calibration and simplify the design. Testing is facilitated by the use of simplified signal generators having "piston" attenuators. The attenuator comprises a pair of coplanar coils, coaxial coils, or condenser plates, one fixed and one movable axially in a moderately long cylindrical copper shield. The attenuation in decibels is directly proportional to the displacement of the movable element, and the calibration can be comnputed.Keywords
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