IG-4505 Oscilloscope Calibrator The Heathkit IG-4505 Oscilloscope Calibrator is an accurate, crystal-controlled, fast-rise square wave generator. It provides an accurate time and amplitude signals needed to calibrate Heathkit Oscilloscopes, as well as most other oscilloscopes. SPECIFICATIONS TIME OUTPUT SIGNAL Range . . . . . . . . . . . . . . . . . . . 0.5 sec to 1 usec square wave in a 1-2-5 sequence Accuracy. . . . . . . . . . . . . . . . . . 0.01% Amplitude . . . . . . . . . . . . . . . . . 200 mV peak (approx.) Rise Time . . . . . . . . . . . . . . . . . <= 4 ns Overshoot . . . . . . . . . . . . . . . . . <= 3% Output. . . . . . . . . . . . . . . . . . . 50 ohm terminated cable VOLTAGE OUTPUT SIGNAL Ranges . . . . . . . . . . . . . . . . . . 1 mV to 100 V peak square wave Accuracy . . . . . . . . . . . . . . . . . Within 2% into 1Mohm load when referenced to the 1 V position Rise Time . . . . . . . . . . . . . . . . . <= 2 usec Frequency . . . . . . . . . . . . . . . . . DC, 2 Hz to 10k Hz in a 1-2-5 sequence GENERAL Internal Voltage Reference. . . . . . . . . 5 volts +/- 1% Power Requirements . . . . . . . . . . . . 120/240 VAC, 50/60 Hz, 12 watts Dimensions. . . . . . . . . . . . . . . . . 9-1/8” wide, 2-3/4” high, 4-1/4” deep