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Tektronix 1-3 GHz touch screen color DSO back in 1989 !
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snoopy:
Do people know that Tek had a touch screen, full color DSO with 10 bit ADC back in 1989 ? The 11403 had 1GHz bandwidth and the later 11403A had 3GHz bandwidth with 2GHz trigger bandwidth !! Anyone still using one of these old war horses ?



Check out this crusty old VHS video !!



Official datasheet

https://accusrc.com/uploads/datasheets/4351_11403A.pdf

http://w140.com/tekwiki/wiki/11403



David Hess:
The real time sample rate was pretty low on these so they relied on equivalent time sampling and were not suitable for general purpose use.  There were other mainframes in this series which supported real time sampling at rates to support their 1 GHz bandwidth.

They are certainly impressive but this was the start of test instruments from Tektronix which lacked service documentation so relatively minor problems are major problems.
bjcuizon:
The touchscreen is just a crt but with Multiplexed IR Leds and receivers on the sides of the crt. Basically, as you touch a certain point of the screen, you interrupt the IR light that is pointed at an IR receiver. Check this out:
Mr Carlson's Tek Scope
Wuerstchenhund:

--- Quote from: snoopy on August 20, 2017, 01:15:03 am ---Do people know that Tek had a touch screen, full color DSO with 10 bit ADC back in 1989 ?
--- End quote ---

Yes, but these were sampling scopes, i.e. the real-time sample rate was abysmally low, so it was only really useful for  truly repetitive signals.

Also, touch screens weren't really new back then, computers with similar touch technology (IR LED scanners) have been available earlier than that.


--- Quote ---The 11403 had 1GHz bandwidth and the later 11403A had 3GHz bandwidth with 2GHz trigger bandwidth !!
--- End quote ---

Yes, but so what? Back in 1989 HP had the 54120B which could go up to 50Ghz with the 54124A 4ch test set:



And Philips had the PM3340 2GHz 10bit 50kSa/s sampling scope back in 1988:




--- Quote ---Anyone still using one of these old war horses ?
--- End quote ---

I doubt it. Sampling scopes are useful only in very few situations.
David Hess:

--- Quote from: Wuerstchenhund on August 20, 2017, 04:29:50 am ---
--- Quote from: snoopy on August 20, 2017, 01:15:03 am ---Do people know that Tek had a touch screen, full color DSO with 10 bit ADC back in 1989 ?
--- End quote ---

Yes, but these were sampling scopes, i.e. the real-time sample rate was abysmally low, so it was only really useful for  truly repetitive signals.
--- End quote ---

The model being discussed is not a sampling oscilloscope.  There were 4 different series of these mainframes:

1. The 11400/11200 series are 20 MSamples/second and 10k with 10/9 bit resolution.
2. The DSA series are up to 2 GSamples/second and 32k with 8 bit resolution.
3. The 11300 series are 500 MHz MCP analog oscilloscopes with a lot of automatic amplitude and time measurement capability.  These did not use a touch screen.

These series all had at least dual independent timebase capability including dual delayed timebases.

Except for the "low cost" 11200, the above all took the same improved 7000 series vertical amplifier plug-ins.

4. The CSA/11800 series are sequential only sampling oscilloscopes operating at 200 kSamples/second and 8 bits with a bandwidth up to 40 or 50 GHz although the 20 GHz differential TDR/sampling head is probably the most interesting.
 
These used the SD series sampling heads.
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