Agilent 1954-01 free download

File name 1954-01.pdf

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. 5 No. 5-6 IBLISHED 1954 THE HEWLETT-PACKARD COMPANY, 395 PAGE MILL ROAD, PALO ALTO, CALIFORNIA JAN. -FEB., 1954 A New Signal Generator for the 7,000 to 11,000 MC Range >~pHE new -hp- Model 620 A SHF Signal Gen- source in this frequency region. For radar work JL erator operates over the frequency range and other pulse type applications, the modu from 7,000 to 1 1,000 megacycles and incorpo lation system includes a pulser so that any r-f rates all of the features that have given an un pulse width is obtainable from '/z to 10 micro usual measure of popularity to the other -hp- seconds at any repetition rate from 40 to 4,000 high- frequency generators. For example, the pps. Both the pulse width and pulse repetition new 620A is direct-reading in frequency and rate are selected by direct-reading controls. For applications such as slotted line work, in power output, provides a maximum of ap the modulation system provides for a square- proximately 1 milliwatt over most of its fre wave modulated r-f output which is adjustable quency range, has an accurate continuously- over a range from 40 to 4,000 cps. The repe adjustable output attenuator to provide output levels as low as 0.1 microvolt, and has a flexible tition frequency of the square-wave modula tion is selected by the same direct-reading con modulation system that provides for both in trols that select the repetition frequency for ternal and external modulation. pulse modulation. The flexibility of the modulation system is such as to enable t