250
The Tektronix Model 250 and its rack-mount version, the R250, are instruments introduced in 1968 that extend the number of control lines of a model 240 Programmer.
Having more lines allows, for example, a 240 to control a R116 or R293 pulse generator as the stimulus for a device under test, while simultaneously controlling a 230 and a 568 for measurement of the response.
Manuals
- Manual needed.
- Tektronix S-3130 Digital Measurements System Manual (PDF)
- 240 and R250 Description from Tektronix Automated Testing Systems book (PDF)
- Tektronix 240-250 Factory Calibration Procedure, April 1969 (PDF, needs OCR)