067-0596-00

From TekWiki
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
Tektronix 067-0596-00
Chopped Voltage Reference Calibration Fixture
Tektronix 067-0596-00 Chopped Voltage Reference Calibration Fixture

Produced from 1969 to (?)

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 067-0596-00 Chopped Voltage Reference Calibration Fixture is a signal generator that produces an approximately square waveform that alternates between two precisely controlled voltages, "V1" and "V2".

The unit consists of three subsystems − a variable DC voltage source for V1, a variable DC voltage source for V2, and an astable multivibrator that drives the coil of a relay that switches the output between V1 and V2. Each of the three subsystems has its own floating power supply (isolated secondary) coming off a power transformer that they share.

The 067-0596-00 uses an Airpax A175 chopper to switch the output between V1 and V2.

The 067-0596-00 is specified as part of calibration procedure for the 141A.

Background

Phil Crosby writes regarding 067-0596-00:

I'm pretty sure it was Steve Roth, one of the most intuitive designers I've ever worked with who designed the 067-0596-00. I'm cc'ing Chuck Barrows because around that time I went into the 7K group, so I missed a lot.

Chuck Barrows writes regarding 067-0596-00:

We needed something in a hurry to calibrate the 141 signal amplitudes. I did the first one at Charlie Rhodes direction, a ‘Friday afternoon project’. He insisted on things like an OG3 as reference. Pretty sure there was a much improved later unit.

John Addis writes regarding 067-0596-00:

The 141 was introduced in March 1969. The positive and negative voltage references for the 067-0596-00 are 11.7 V temperature compensated Zener diodes, apparently with a ±10 ppm/˚C temperature coefficient.

Pictures