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summary=1 GHz, 4 GS/s 4-ch-channel digital scope |
summary=1 GHz, 4 GS/s 4-ch-channel digital scope |
manuals=
manuals=
[[Category:Manual needed]] ''please add''
* [http://w140.com/tek_tds_684a_744a_784a_service.pdf Tektronix TDS 684A, TDS 744A, and TDS 784A Service Manual (PDF)]
* [http://w140.com/manual_TDS754A.pdf TDS 500B, TDS 600B, and TDS 700A Digitizing Oscilloscopes 070-9719-00 (PDF)]
* [http://w140.com/tek_tech_ref_TDS_520B_540B_620B_644B_680B_684B_724A_744A_784A.pdf TDS 520B, TDS 540B, TDS 620B, TDS 644B, TDS 680B, TDS 684B, TDS 724A, TDS 744A, and TDS 784A Digitizing Oscilloscopes Performance Verification and Specifications 070-9384-01 (PDF)]
* [http://w140.com/TDS640A_Programmer_EN.pdf Tektronix TDS 410A, 420A, 460A, 520A, 524A, 540A, 544A, 620A, 640A, 644A, 684A, 744A & 784A Programmer Manual 070-8709-07]
}}
}}
The '''Tektronix TDS784''' is a 1 GHz, 4 GS/s quad-channel digital storage scope.
The '''Tektronix TDS784''' is a 1 GHz, 4 GS/s quad-channel digital storage scope.
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* I/O: Full GPIB programmability
* I/O: Full GPIB programmability
* Hardcopy output using [[GPIB]], [[RS-232]], or Centronics ports
* Hardcopy output using [[GPIB]], [[RS-232]], or Centronics ports
==Options==
* 13 − Add RS-232C and Centronics hardcopy interfaces
* 1F − Floppy disc drive
* 1M − Extends standard acquisition length from 50,000 points per channel to 130,000 samples on three or four channels, 250,000 samples on two channels, and 500,000 samples on one channel
* 2F − Extended waveform math: FFT, integration and differentiation
* 2C − Communication Signal Analyzer; includes comm triggers and communication mask testing


==Links==
==Links==
* [http://www.eevblog.com/forum/testgear/conversion-of-500mhz-tds744a-to-1ghz-tds784a/ Conversion of 500MHz TDS744A to 1GHz TDS784A]
* [http://www.eevblog.com/forum/testgear/conversion-of-500mhz-tds744a-to-1ghz-tds784a/ Conversion of 500 MHz TDS744A to 1 GHz TDS784A]
* [http://forum.tek.com/viewtopic.php?f=568&t=140017/ Tek Forum thread on recovering the unit from a bricked state]
* Tek Forum threads:
* [http://forum.tek.com/viewtopic.php?f=568&t=139999&hilit=TDS784/ Tek Forum thread on firmware updating]
** [http://forum.tek.com/viewtopic.php?f=568&t=140017/ Recovering the unit from a bricked state]
* [http://forum.tek.com/viewtopic.php?f=568&t=138168&hilit=TDS784/ Tek Forum thread on backing up and restoring calibration data]
** [http://forum.tek.com/viewtopic.php?f=568&t=139999&hilit=TDS784/ Firmware updating]
** [http://forum.tek.com/viewtopic.php?f=568&t=138168&hilit=TDS784/ Backing up and restoring calibration data]
* [http://www.simmconnlabs.com/2001/9001.html/ Simmconn Labs LCD replacement kits for CRT-based TDS O-scopes]
* [http://www.simmconnlabs.com/2001/9001.html/ Simmconn Labs LCD replacement kits for CRT-based TDS O-scopes]
* [http://www.eevblog.com/forum/testgear/hackingupgrading-old-scope-(tds754d)/ EEVBlog Forum thread on TDS options and how to enable them]
* [http://www.eevblog.com/forum/testgear/hackingupgrading-old-scope-(tds754d)/ EEVBlog Forum thread on TDS options and how to enable them]
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It is also worth noting the [[TDS754]] and TDS784 series are nearly identical, with the differences being in front-panel cosmetics and the presence (754) or absence (784) of a few capacitors on the acquisition board. The only other difference is the position of instrument ID jumpers, also on the acquisition board. In fact, it is entirely possible to convert a 754 to a 784 (see the 'Links' section).
It is also worth noting the [[TDS754]] and TDS784 series are nearly identical, with the differences being in front-panel cosmetics and the presence (754) or absence (784) of a few capacitors on the acquisition board. The only other difference is the position of instrument ID jumpers, also on the acquisition board. In fact, it is entirely possible to convert a 754 to a 784 (see the 'Links' section).


Note that any kind of firmware updating of the 784 (and most other similar TDS O-Scopes) requires very specific equipment, starting with an older computer (ISA slots required) running MS-DOS 5.x or later as well as Windows 98SE. To interface with the 'scope, you will need a National Instruments PC/GPIB-II ISA-based (8-bit) GPIB board or a National Instruments AT-GPIB (16-bit) board and appropriate drivers. The software required to do the update (Tektool or Tekfwtool) also runs under DOS (or a DOS box in Windows 98). Information on this tool can be found in the 'Links' section in the thread describing firmware updates.
Note that any kind of firmware updating of the 784 (and most other similar TDS scopes) requires very specific equipment, starting with an older computer (ISA slots required) running MS-DOS 5.x or later as well as Windows 98SE. To interface with the scope, you will need a National Instruments PC/GPIB-II ISA-based (8-bit) GPIB board or a National Instruments AT-GPIB (16-bit) board and appropriate drivers. The software required to do the update (Tektool or Tekfwtool) also runs under DOS (or a DOS box in Windows 98). Information on this tool can be found in the ''Links'' section in the thread describing firmware updates.


Actual calibration requires the above computer, the specific PC/GPIB-II card and drivers and an MS-DOS environment. You will also need an Analogic/Data Precision model 8200 DC voltage standard and a leveled sine-wave generator capable of going up to 1GHz (if you're just doing a 754, you can get away with a 500MHz top end). Naturally, Tek used the SG503 and SG504.
Actual calibration requires the above computer, the specific PC/GPIB-II card and drivers and an MS-DOS environment. You will also need an Analogic/Data Precision model 8200 DC voltage standard and a leveled sine-wave generator capable of going up to 1 GHz (if you're just doing a 754, you can get away with a 500 MHz top end). Naturally, Tek used the [[SG503]] and [[SG504]].


The reason for the specific model of voltage standard is because that's the model Tektronix wrote the calibration software for. During the calibration process, it issues automated commands specific to the Analogic.
The reason for the specific model of voltage standard is because that's the model Tektronix wrote the calibration software for. During the calibration process, it issues automated commands specific to the Analogic.


Finally, for those with a dimming CRT, Simmconn Labs has developed a color LCD panel kit to replace said CRT in most of the TDS series which use them. Again, see the 'Links' section.
Finally, for those with a dimming CRT, [http://www.simmconnlabs.com/ Simmconn Labs] has developed a color LCD panel kit to replace said CRT in most of the TDS series which use them.  


==Manuals==
* [http://w140.com/tek_tds_684a_744a_784a_service.pdf Tektronix TDS 684A, TDS 744A, and TDS 784A Service Manual (PDF)]
* [http://w140.com/manual_TDS754A.pdf TDS 500B, TDS 600B, and TDS 700A Digitizing Oscilloscopes 070-9719-00 (PDF)]
* [http://w140.com/tek_tech_ref_TDS_520B_540B_620B_644B_680B_684B_724A_744A_784A.pdf TDS 520B, TDS 540B, TDS 620B, TDS 644B, TDS 680B, TDS 684B, TDS 724A, TDS 744A, and TDS 784A Digitizing Oscilloscopes Performance Verification and Specifications 070-9384-01 (PDF)]
* [http://w140.com/TDS640A_Programmer_EN.pdf Tektronix TDS 410A, 420A, 460A, 520A, 524A, 540A, 544A, 620A, 640A, 644A, 684A, 744A & 784A Programmer Manual 070-8709-07]




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