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|designers=
|designers=
|manuals=
|manuals=
* [https://archive.org/download/070-1111-00/070-1111-00.pdf Tektronix 146 Manual]
* [[Media:070-1111-00.pdf|Tektronix 146 Manual]]
* [http://w140.com/tek_146_1971_cat.pdf Tektronix 146 Description in 1971 Catalog (PDF)]
* [http://w140.com/tek_146_1971_cat.pdf Tektronix 146 Description in 1971 Catalog]
<small>
<small>
* [[Media:AX-3265.pdf|Tektronix Television Products Application Note #22: Shortening the Blanking Intervals of the Tektronix 140-144-146 NTSC Generators]] (PDF)
* [[Media:AX-3265.pdf|Tektronix Television Products Application Note #22: Shortening the Blanking Intervals of the Tektronix 140-144-146 NTSC Generators]] (PDF)
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The '''Tektronix 146''' is an NTSC signal generator.
The '''Tektronix 146''' is an NTSC signal generator.


See also [[140]] and [[144]].
Regarding the Tek 146, [[Phil Crosby]] recalls:
 
Regarding the 146, [[Phil Crosby]] recalls:
<blockquote>
<blockquote>
It was probably a [[Steve Roth]] design, although he may have gotten help from [[Dave Jurgenson]].
The 146 is RTL all the way, so basically, the 146 is a 140 with genlock,  
Steve was a wizard.
allowing it to be locked to an external source, unlike the 140, which runs all by itself.
He designed the goniometer for doing seamless phase adjustment and all of the early video test signal generators.
The first test signal generator was the [[141]] PAL generator.
We had wanted to do test signal generators for a long time, having spent a lot of money for a Riker generator,  
which we were told was the top of the line. It was terrible!
The color bars were just hard-switched between the various phase and amplitude sources.
Generating horrible transitions. Other than that, it was a drifty, mechanically horrible piece of crap.
The PAL version of the vectorscope, the [[521]] obviously needed PAL test signals,
particularly linearity staircase and color bars to be calibrated and evaluated.
There was a source. Some Swiss division of RCA said that they could supply us with such a generator in 18 months for about $18,500.
Steve was coming free from the work I'd given him on the [[520]] NTSC vectorscope,
so I asked him if he would be interested in doing a generator for PAL.
I knew it would be tricky because of the subcarrier frequency offset.
Steve also decided to use these newfangled integrated circuits
(RTL, unfortunately, since I had used them in the 520 cuz they were cheaper than TTL Ouch!).
In six months we had working prototypes and I took one to the 1968 NAB show in Chicago.
It made a big hit with the FEs because they had something to demo PAL vectorscopes to systems sellers.
With the groundswell response from the field, in about six months we had product approval.
The 148 followed with Steve's sync separator circuit employing a transistor that is reflexed into common emitter,
common base, and common collector operation at the same time.
As I recall the 146 had the sync separator for its genlock and maybe it went to TTL as well.
Brilliant!
</blockquote>
</blockquote>
For more information in the RTL logic chips used in the 146, see [[Media:1969_Fairchild_ch1-5.pdf|Fairchild's 1969 Data Catalog]]
See also [[140]] and [[144]].


{{MissingSpecs}}
{{MissingSpecs}}
==Links==
{{Documents|Link=146}}
{{PatentLinks|146}}


==Pictures==
==Pictures==
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[[Category:Signal generators]]
[[Category:TV signal generators]]

Latest revision as of 02:48, 18 June 2024

Tektronix 146
NTSC signal generator
Tektronix 146

Produced from 1971 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 146 is an NTSC signal generator.

Regarding the Tek 146, Phil Crosby recalls:

The 146 is RTL all the way, so basically, the 146 is a 140 with genlock, allowing it to be locked to an external source, unlike the 140, which runs all by itself.

For more information in the RTL logic chips used in the 146, see Fairchild's 1969 Data Catalog

See also 140 and 144.

Key Specifications

  • please add

Links

Documents Referencing 146

Document Class Title Authors Year Links
AX-3265.pdf Application Note Shortening the Blanking Intervals of the Tektronix 140-144-146 NTSC Generators (TV Products App Note No.22) 1976 140 • 144 • 146

Patents that may apply to 146

Page Title Inventors Filing date Grant date Links
Patent US 3453403A Power selection device Eldon Hoffman 1966-08-18 1969-07-01 115 • 140 • 141 • 141A • 144 • 145 • 146 • 147 • 148 • 149 • 149A • 230 • 284 • 286 • 453 • 454 • 491 • 520A • 521A • 522 • 545B • 547 • 556 • 561B • 564B • 568 • 576 • 611 • 647A • 2101 • 2601 • 5030 • R5030 • 5031 • R5031 • 7503 • 7504 • 7704 • 7704A • 7904 • R7903

Pictures

  • Output displayed on NTSC monitor

    Output displayed on NTSC monitor

  • Output displayed on NTSC monitor

    Output displayed on NTSC monitor

  • Output displayed on NTSC monitor

    Output displayed on NTSC monitor

  • Output displayed on NTSC monitor

    Output displayed on NTSC monitor

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