Agilent 1955-09 free download

File name 1955-09.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. 7 No. 1 ^^^^M LISHED CALIFORNIA THE HEWLETT-PACKARD COMPANY, 275 PAGE MILL ROAD, PALO ALTO, CALIFORNIA SEPTEMBER, 1955 A New 3 CPS-100 KG Electronic Frequency Meter with Discriminator Output and Expandable Scale "T7LECTRONIC frequency meters, as distin- enables the instrument to be used as a wide 1 J guished from electronic frequency count band discriminator in applications where the ers, are instruments that indicate the frequency measured signal contains very rapid frequency of an applied waveform on a calibrated meter changes or frequency modulation. The dis scale. The current that operates the indicating criminator voltage, when filtered, can be used meter is also usually made available for operat in measuring the amount of deviation in the ing an external d-c recorder. signal as well as the rate and components of the Besides indicating an applied frequency and deviation. providing a recorder output, however, the new Frequency-wise, the new instrument will di -hp- Model 500B Electronic Frequency Meter rectly measure frequencies from 3 cps to 100 kc is designed to be valuable in two other types of in nine ranges to a full scale accuracy of within measurements. First, it is designed to be able to ±2%. The applied voltage can have nearly any expand its scale readings by factors of 3 or 10 of the common waveforms. Random as well as times, an arrangement that facilitates measure equally-spaced signals can be measured. ments of frequency changes such as might be The instrument further provides a d-c supply caused by line voltage changes on frequency- for operating the -hp- 5 06 A Optical Pickup, a generating circuits. Second, the instrument is device that detects even the fastest rotary mo