Good Condition - HEATHKIT MANUAL for the 15NHZ DUAL TRACE OSCILL (Catlett, VA)

Good Condition - HEATHKIT MANUAL for the 15NHZ DUAL TRACE OSCILL

Local pick-up preferred (please call first) but will ship at the buyer s expenseKingston Books 15 - IMG_7594Illustrations Troubleshooting Chart Fold outs Parts listINTRODUCTIONThis Oscilloscope is a portable triggered dual trace DC-to-16 MHz laboratory grade instrument. Outstanding features such as the fast vertical rise time vertical delay lines good trace brightness and the high input sensitivity make the Oscilloscope ideal for the wide range of measurements typically encountered in electronics development laboratories and scientific research. In addition the rugged construction and dependable operation make it a versatile tool for either the hobbyist or service technician.Each of the two identical input channels provides a maximum signal sensitivity of 1 millivolt centimeter. Their attenuator networks can be switched through 12 calibrated ranges to set the deflection factor from 1 millivolt centimeter to 5 volts centimeter. An internal vertical delay line insures that the horizontal sweep starts before the beginning of the vertical signal. Thus the complete vertical waveform will be displayed. Since amplifier rise time is 24 nanoseconds very fast rise-time signals are faithfully reproduced.Several modes of signal display are selected by each channel s position control and the Time Base switch. Either or both channels can be displayed as a function of time or as a function of each other. At slower sweep speeds the vertical channel signals are alternately displayed at a 200 kHz (approximately) rate (copped mode) so both signals appear as a function of the same time base. . For faster sweep speeds both signals are displayed alternately (alternate mode) on successive sweeps. During X-Y operation the channel Y1 (X) circuits provide horizontal ( X axis) deflection and channel Y2 (Y) circuits provide vertical (Y axis) deflection. Calibrated time- base ranges from .2 seconds centimeter to .1 microseconds centimeter are readily switched in a 1- 2- 5 step sequence. A control of the Time Base switch provides variable sweep speeds between switch positions. Any sweep speed can be expanded 5 times when the X5 control is pulled out giving a maximum sweep speed of 20 nS centimeter.The Trigger Select switch and Level controls allow the time base to be precisely triggered at any point along the positive or negative slope of the trigger signal. Various trigger signals can be selected. These include a sample of Channel Y1 or Channel Y2 input signals an externally applied trigger signal or a sample of the line voltage. The Trigger Mode switch controls the trigger input Bandpass cutting off unwanted low frequency trigger signals.A calibrated 1-volt peak-to-peak square wave signal is provided through a front panel connector allowing easy probe compensation vertical amplifier calibration and comparison.Front panel display controls include Intensity Focus Graticule Illumination and Vertical and Horizontal position. Two additional controls accessible through the rear panel adjust the Astigmatism and Geometry. An internal switch is used to match the regulated power supply to the line voltage from 100 volts to 280 volts AC.Thus this oscilloscope combines the most desirable features required for precise measurements and display while its solid-state circuitry provides the ultimate in sensitivity stability and versatility.Refer the Kit Builders Guide for complete information on unpacking parts identification tools wiring soldering and step-by-step proceduresContents by Chapter (in brief)INTRODUCTION ..3SPECIFICATIONS ..5OPERATION Control Functions ..7THEORY of OPERATION ..15CIRCUIT DESCRIPTION Vertical ..17CALIBRATION Initial Calibration ..27TROUBLESHOOTING Troubleshooting Precautions and Notes ..39COMPONENT IDENTIFICATION ..Circuit Board X-Ray Views ..57IDENTIFICATION CHARTS ..77SCHEMATIC (fold-out from page) ..85Circuit Board Module Service Policy ..86WARRANTY ..(Inside front cover)CUSTOMER SERVICE ..(Inside rear cover)SPECIFICATIONSVERTICALInput Impedance ..1 MegOhm shunted b 38 pF.Maximum Input Voltage ..400 volts peak combined AC and DCSensitivity ..1mV to 5V cm in a 1-2-5 sequence accurate to within 3%. Uncalibrated continuously variable between steps minimum sensitivity of approximately 15V cm.Frequency Response ..DC to 15 MHz (-3db)Rise Time ..24 ns.Overshoot ..Less than 3%Vertical Windows ..2 minimum.Vertical modes ..Channel Y1 channel Y2 Y1 and Y2 chopped channels Y1 and Y2 alternately. Modes are selected by the channel Y1 position channel Y2 position and time base switch.HORIZONTALModes ..Sweep X-Y and external.Time Base .2S to .1 microseconds cm in 32 calibrated steps. 1-2-5 sequence accurate to within 3%. Uncalibrated continuously variable between ranges maximum of approximately 500 mS cm.X5 Sweep Magnifier ..Accurate to within 5%Input Impedance ..Approximately 200 K-ohmsInput Sensitivity ..0.4 cm (approximately) No attenuator negative signal causes trace to move to the right.X-Y Sensitivity ..1mV to 5 V cm in a 1-2-5 sequence.X Phase Shift ..Less that 3 at 100 kHz.TRIGGERDelay Line ..Allows display of at least 20 nS of the pretrigger waveform.Bandwidth (normal mode at 1 cm deflection) AC ..20 Hz 30 MHZ typically 20 Hz 45 MHZ.ACF ..15 KHz 30 MHz typically 15 kHz 45 MHz.DC ..DC-30 MHz typically DC- 25 MHzBandwidth (automatic mode at 1 cm deflection) ..DC 10 MHz typically DC 26 MHz.Sensitivity ..Less than .5 cm.External Input Sensitivity ..Less than .5 V typically .1V.External Input Impedance ..1M shunted by approximately 30 pF.GENERALCRT Acceleration potential ..4000 V regulated.CRT Type ..6 X 10 cm Spiral PDA (Post Deflection Acceleration)CRT Phosphor ..P31Power Supplies ..Fully RegulatedAC Line Switch ..Allows operation from a 100-140 VAC or 200-280 VAC power source.Power Requirements ..100-140 VAC or 200-280 VAC 50 60 Hz. 75 wattsInput Connectors ..Coaxial BNCGraticule Illumination ..Adjustable from front panel.Dimensions Height ..17.7 cm (6.937 in.). Length (handle extended) ..54.5 cm (21.5 in.). Length (handle folded) ..49cm. (19.25 in.). Width ..32.5 cm (12.875 in.).Weight ..11 kg. (24 lbs)Operating Temperature ..10 C to 40 CPaperback 85 pages