Agilent 1964-06 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 - t i p - L A B O R A T O R I E S Vol. 15, No. 10 UBLISHED BY THE HEWLETT-PACKARD COMPANY, 1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA JUNE, 1964 Precision Plug-In Frequency Measurements to 3000 Me A new plug-in converter for the -hp- high-speed counter extends the simplicity of the frequency counter up to 3000 Me at resolutions up to 3 parts in 10". XRECISION frequency measurements as high as troposcatter communications systems, of micro 3000 Me can now be made with a new frequency wave aircraft navigation aids, of telemetry sys converter plug-in for the -hp- 50 Me Counter. tems in the TRIG 2.2 Gc band, and of other UHF This 3000 Me capability represents a significant devices. increase in the frequency range of heterodyne The new plug-in, -hp- Model 5254A, uses the converters for electronic counters. With the new heterodyne frequency translation principle. This plug-in, the -hp- Model 5245L Counter is now technique, in combination with a high speed able to directly measure the frequencies of UHF counter, has been used by -hp- for precise VHF SEE ALSO: Changes in NBS Broadcasts, p. 5 Changes in Navy VLF Frequencies, p. 5 New four-channel 40 Me scope plug-in, p. 6 2 50J L2 55 30Gc TUNING DIAL POSITION Fig. 2. Plot