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==7912AD and 7912HB== | ==7912AD and 7912HB== | ||
From the '''7912AD''' (1978) on, the instrument had a standard [[GPIB interface]] and could drive X-Y monitors directly. In contrast to the earlier R7912 the readout characters in video mode | From the '''7912AD''' (1978) on, the instrument had a standard [[GPIB interface]] and could drive X-Y monitors directly. In contrast to the earlier R7912, the readout characters in video mode were created digitally and directly injected into the video signal. | ||
The 7912AD has 500 MHz bandwidth. It was succeeded by the 750 MHz '''7912HB''' in 1987 (using a [[7A29P]] amplifier). | The 7912AD has 500 MHz bandwidth. It was succeeded by the 750 MHz '''7912HB''' in 1987 (using a [[7A29P]] amplifier). | ||
For the 7912AD and 7912HB, special GPIB-controllable plug-in modules with a 'P' suffix | For the 7912AD and 7912HB, special GPIB-controllable plug-in modules with a 'P' | ||
were available, e.g. [[7A16P]], [[7A29P]] and [[7B90P]]. | (Programmable) suffix were available, e.g. [[7A16P]], [[7A29P]] and [[7B90P]]. | ||
===7912AD Options=== | ===7912AD Options=== | ||
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==Internals== | ==Internals== | ||
Three output methods are provided: Video (NTSC or PAL), X-Y-Z low-speed analog, and a [[GPIB interface]]. For video-out Tektronix | Three output methods are provided: Video (NTSC or PAL), X-Y-Z low-speed analog, and a [[GPIB interface]]. For video-out, Tektronix recommended the [[634|634 monitor]] or a monitor from the 650- and 670-series and a 75 Ω termination. For X-Y-Z analog, Tek recommended a 600-series monitor and no specific termination requirement. | ||
With aftermarket modifications to the electronics, 7912AD bandwidths have been extended up to 3 GHz in special cases. | With aftermarket modifications to the electronics, 7912AD bandwidths have been extended up to 3 GHz in special cases. | ||
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==Literature and Software== | ==Literature and Software== | ||
# [http://tekretirees.org/Newsletter/nov2012_trn.pdf Hale Farley, ''The introduction of the R7912''] in Tek Retirees Newsletter 11/2012 | # [http://tekretirees.org/Newsletter/nov2012_trn.pdf Hale Farley, ''The introduction of the R7912''] in Tek Retirees Newsletter 11/2012 | ||
# [ | # [[Patent US 3748585A|US Patent 3748585: ''Silicon Diode Array Scan Converter Tube and Method of Operation''. Culter et al, July 1973.]] | ||
# [http://pwww.lle.rochester.edu/media/publications/lle_review/documents/v25/25_Review.pdf LLE Review, Oct-Dec 1985] mentioning the '''LM7912A''', a Lockheed-modified R7912 variant having ''"a bandwidth of 3.5 GHz at the -3 dB point, less than 5% undershoot and overshoot, with a 12-bit output (2 mV/bit)"'' | # [http://pwww.lle.rochester.edu/media/publications/lle_review/documents/v25/25_Review.pdf LLE Review, Oct-Dec 1985] mentioning the '''LM7912A''', a Lockheed-modified R7912 variant having ''"a bandwidth of 3.5 GHz at the -3 dB point, less than 5% undershoot and overshoot, with a 12-bit output (2 mV/bit)"'' | ||
# [http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/10/434/10434659.pdf Lockheed Palo Alto Research Lab study for LLL (June 1978)] describing the LM7912 Enhanced Performance Transient Digitizer, claiming 3 GHz bandwidth | # [http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/10/434/10434659.pdf Lockheed Palo Alto Research Lab study for LLL (June 1978)] describing the LM7912 Enhanced Performance Transient Digitizer, claiming 3 GHz bandwidth | ||
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* [[Carlo Infante]]: A New Way to Look At Transients (R7912). In [[Media:Tekscope 1973 V5 N6 Nov 1973.pdf | TekScope Vol. 5 No. 6, Nov-Dec 1973]] | * [[Carlo Infante]]: A New Way to Look At Transients (R7912). In [[Media:Tekscope 1973 V5 N6 Nov 1973.pdf | TekScope Vol. 5 No. 6, Nov-Dec 1973]] | ||
* [http://www.radiomuseum.org/forum/tektronix_r7912_transient_digitizer.html Tek R7912 @ radiomuseum.org] | * [http://www.radiomuseum.org/forum/tektronix_r7912_transient_digitizer.html Tek R7912 @ radiomuseum.org] | ||
* [[Dale Aufrecht]]: An Intelligent, Programmable Transient Digitizer (7912AD). In [[Media:Tekscope 1979 V11 N1.pdf | TekScope Vol. 11 No. 1, 1979]] | * [[Dale Aufrecht]]: An Intelligent, Programmable Transient Digitizer (7912AD). In [[Media:Tekscope 1979 V11 N1.pdf | TekScope Vol. 11 No. 1, 1979]] | ||
* [http://www.radiomuseum.org/r/tektronix_7912ad.html Tek 7912AD @ radiomuseum.org] | * [http://www.radiomuseum.org/r/tektronix_7912ad.html Tek 7912AD @ radiomuseum.org] | ||