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The Tektronix Type 191 Constant Amplitude Signal Generator is a sine wave source | The Tektronix Type 191 Constant Amplitude Signal Generator is a sine wave source | ||
introduced in 1966. It covers frequencies from 350 kHz to 100 MHz in seven bands. The output | [[introduced in 1966]]. It covers frequencies from 350 kHz to 100 MHz in seven bands. The output | ||
amplitude can be adjusted in calibrated steps from 5 mV to 5 V in three ranges. The oscillator | amplitude can be adjusted in calibrated steps from 5 mV to 5 V in three ranges. The oscillator | ||
is an Colpitts oscillator using a [[7119]] tube. A peak-to-peak detector made with two GaAs diodes | is an Colpitts oscillator using a [[7119]] tube. A peak-to-peak detector made with two GaAs diodes | ||