Agilent 1958-09 free download

File name 1958-09.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 /ol. 10 No. 1-2 HJBLISHED BY THE HEWLETT-PACKARD COMPANY, 275 PAGE MILL ROAD, PALO ALTO, CALIFORNIA SEPT. -OCT., 1958 A Dual -Trace Automatic Base Line Oscilloscope For The DC - Several Hundred KC Range DUAL-TRACE oscilloscopes, since they per establishing set-ups and making initial adjust mit two separate waveforms to be viewed ments, this feature is of considerable conveni simultaneously, considerably simplify work in ence. When a signal to be viewed is then ap circuits and systems where changes in waveform plied, the sweep will automatically trigger are involved or where time or from the signal in most modes of operation. phase relationships are of inter In its other characteristics the instrument is est. Fig. 2 shows a representa designed to be suited to many applications in tive case where the dual-trace display is of its frequency range. The two vertical amplifiers value. are identical with 3 db points above 200 kc and To make available the convenience of the maximum sensitivities of 0.01 volt/cm. Several dual-trace feature in an instrument for the dc different vertical presentations can be selected, to several hundred kc range, the new oscillo as described more fully later. An internal scope shown in Fig. 1 has been designed. A square- wave calibrator enables the vertical sys special feature of this instrument is that the tem calibration to be easily checked when de dual-trace display is supplemented by an auto sired. Calibrated sweep speeds extend down to matic base-line provision such that, when no 5 microseconds /cm which can be increased to signal is applied, a low-rate sweep automati 1 microsecond cm with a x 5 sweep e