191: Difference between revisions

|summary=Constant Amplitude Signal Generator

|designers=

The '''Tektronix Type 191 Constant Amplitude Signal Generator''' is a sine wave source [[introduced in 1966]]. 

The predecessor of the 191 was the [[067-506]].

It produces sine waves whose amplitude remains constant as the frequency is varied, provided the load limitations of the instrument are not exceeded. 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.

{{Spec | Output impedance | 50 Ω }}

{{Spec | Amplitude range | 5−50 mV, 50-500 mV and 0.5-5 V (Peak-to-Peak) }}

{{Spec | Amplitude accuracy | At 50 KHz into a 50 Ω load: ±3% for 0.5-5 V range; ±4% for 50-500 mV range; ±5% for 5-50 mV range. }}

{{Spec | Amplitude regulation | Into 50 Ω at 50 KHz it's ±3% for 5 mV to 5.5 V, except for 5 mV and 55 mV and a frequency >42MHz where it's +3% and -5%. }}

{{Spec | Frequency range | 350 KHz − 100 MHz }}

{{Spec | Frequency accuracy | Within ±2% of the selected frequency when the output is terminated with 50 Ω. }}

{{Spec | Harmonic content | Typically less than 5%. }}