GENERAL DESCRIPTION The Tektronix Type 511-A Cathode Ray Oscilloscope is a wide range, portable instrument, making possible the observation of a wide variety of electrical waveshapes. It is primarily intended for laboratory and shop use, in the development and testing of all types of electronic equipment. The Type 511-AD Oscilloscope is identical to the Type 511-A except that it includes a factory installed Type 1-AD-25 Delay Network, which is described in Section VII of this manual. CHARACTERISTICS Signal observable 1. Sine waves from 10 cycles to 10 me. 2. Pulses of. 1 microsecond to 1 /50 sec. Sweep Circuit Hard tube type, either triggered or recurrent as desired. Sweep Speeds Continuously variable from .01 sec. per cm to .1 microsecond per cm. Trigger Requirements .5 to 50 V (Peak) sine wave or pulse of either polarity. Pulse as short as .05 microsecond will trigger satisfactorily. A key connected between TRIGGER INPUT and GND. is suitable for triggering single sweeps. Sweep Lag CRT is unblanked and sweep is operating linearly in less than .1 microsecond after receipt of an infinitely sharp trigger pulse. Sweep Magnification Any desired 20% of the sweep can be spread over the entire trace except for sweep speeds faster than .5 microsecond per cm. External Sweep Input DC coupled via 100 K potentiometer and sweep amplifier. Maximum deflection sensitivity 1.5 V per cm DC or peak to peak AC. Band width, DC to 800 kc (3 db down at 800 kc). Vertical Deflection Circuit Switch permits signal input connector on panel to be connected to deflection plates directly, via capacitor (RC=.l sec), via 1 amplifier stage, or via 2 amplifier stages. Input Attenuator Frequency compensated RC type with attenuation ratios of 2, 4, and 8. Vertical Deflection Sensitivity Without amplifier 27 V per cm maximum, 200 V per cm minimum, DC or peak to peak AC. 1 Stage, 2.7 V per cm maximum, 40 V per cm minimum. 2 Stages, .27 V per cm maximum, 4 V per cm minimum. (Sensitivity is reduced by a factor of 10 when probe is used.) In no case should the combined AC and DC input voltages exceed 600 V peak. Input Impedance 1 meg shunted by 40 mmfd (±5%) for any setting of the input selector and input attenuator. With probe, 10 megohms shunted by 14 mmfd. Vertical Amplifier Bandwidth 1 stage, down 3 db (Max) (from 1 me response) at 5 cps and 10 me. 2 stages, down 3 db (Max) (from 1 me response) at 5 cps and 8 me. Vertical Amplifier Transient Response Rise time, 1 stage .04 miarosecond (10% to 90%) 2 stages .05 microsecond (10% to 90%) Calibrating Voltage Sine wave of power line frequency. Three ranges 0-1, 0-10, 0-100 v. peak to peak. Accuracy for line voltage of 117 v. is ±5% of full scale. May be measured with external meter when greater accuracy is required. A position on the SIGNAL CALIBRATE switch allows the use of an external calibrating source when desired. Waveforms available externally. Sweep sawtooth, 20 volts peak. Positive and negative gate, 40 V. peak, same duration as sweep. Connection to CRT Cathode via .1 mfd capacitor. RC=.012 sec. Accelerating voltage on cathode ray tube, 3 KV. Power Requirements. 105-125 volts, or 210-250 volts, 50-60 cycles, 230 watts. (See Section IV.) Weight. 50 pounds. Dimensions. 15Vi" high, 12Vz" wide, 21V2" deep. Finish. Panel, photo etched aluminum with black letters. Cabinet, gray wrinkle.