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The Tektronix 067-0596-00 Chopped Voltage Reference Calibration Fixture is a signal generator | {{Instrument Sidebar | ||
that produces an approximately square waveform that alternates between two precisely | |manufacturer=Tektronix | ||
controlled voltages, "V1" and "V2". The unit consists of three subsystems | |model=067-0596-00 | ||
a variable DC voltage source for V1, a variable DC voltage source for V2, and an astable | |class=Signal generator | ||
multivibrator that drives the coil of a relay that switches the output between V1 and V2. | |series= | ||
Each of the three subsystems has its own floating power supply (isolated secondary) coming | |summary=Chopped Voltage Reference Calibration Fixture | ||
off a power transformer that they share. | |image=067-0596-00 front.jpg | ||
|caption=Tektronix 067-0596-00 Chopped Voltage Reference Calibration Fixture | |||
|introduced=1969 | |||
|discontinued=(?) | |||
|designers=Steve Roth | |||
|manuals= | |||
* [[Media:062-1094-00.pdf|Tektronix 067-0596-00 Manual]] (PDF) | |||
}} | |||
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 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 [[141|141A]]. | |||
==Background== | |||
[[Phil Crosby]] writes regarding 067-0596-00: | |||
<blockquote> | |||
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 [[7000-series_scopes|7K group]], so I missed a lot. | |||
</blockquote> | |||
[[Chuck Barrows]] writes regarding 067-0596-00: | |||
<blockquote> | |||
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. | |||
</blockquote> | |||
[[John Addis]] writes regarding 067-0596-00: | |||
<blockquote> | |||
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. | |||
</blockquote> | |||
==Pictures== | |||
<gallery> | <gallery> | ||
067-0596-00 waveform.jpg | |||
067-0596-00 schem.png | |||
067-0596-00 front.jpg | |||
067-0596-00 right.jpg | |||
067-0596-00 top.jpg | |||
067-0596-00 top2.jpg | |||
067-0596-00 bottom.jpg | |||
</gallery> | </gallery> | ||
[[Category:Calibration fixtures]] | |||
[[Category:Amplitude Calibrators]] | |||
Latest revision as of 06:59, 13 December 2022
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.
