7904: Difference between revisions

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[[Image:7904_block.gif|thumb|200px|right|7904 block diagram]]
{{Oscilloscope Sidebar|
title=Tektronix 7904|
image=7904A_1.JPG|
caption=Tektronix 7904A|
years=1974 — 1992|
summary=500MHz non-storage mainframe|
manuals=
* [http://bama.edebris.com/download/tek/7904/Tektronix_7904_Service_May1983.pdf Tektronix 7904 Manual (PDF)]
* [http://www.ko4bb.com/Manuals/Tektronix/Tektronix_-_7904A/7904a-service-1990.djvu Tektronix 7904A Manual (DjVu)]
* [http://w140.com/Tektronix_7904A_OCRed_by_Tabalabs.pdf Tektronix 7904A Manual (Shannon Hill PDF with OCR)]
* [http://w140.com/Tek_7904_OCRed_by_Tabalabs.pdf Tektronix 7904 Manual (Shannon Hill PDF with OCR)]
* [http://w140.com/Tek_7904_Power_Supply.pdf Servicing the 7904 High-Efficiency Power Supply (PDF)]
}}
The 7904 is a 500MHz mainframe with four bays.  It accepts two [[7000-series_plug-ins#Vertical plug-ins|7000-series vertical plug-ins]] and two [[7000-series_plug-ins#Horizontal plug-ins|7000-series horizontal plug-ins]].   
The 7904 is a 500MHz mainframe with four bays.  It accepts two [[7000-series_plug-ins#Vertical plug-ins|7000-series vertical plug-ins]] and two [[7000-series_plug-ins#Horizontal plug-ins|7000-series horizontal plug-ins]].   


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The 7904 has a many modes of operation.  One mode is called "Independent-Pairs Display" in the manual, where the input to the left vertical plug-in is displayed using the B horizontal timebase plug-in, and the input to the right vertical plug-in is displayed using the A horizontal timebase plug-in.  This resembles the trace-slaving "ALT" mode that is produced by a 1A4 in a 547.  Many other modes are available.  It is possible to put vertical plug-ins in the horizontal slots for X-Y operation.  It is even possible to put a horizontal plug-in in one of the vertical slots to produce a raster scan.  The CRT has distributed vertical deflection plates.  
The 7904 has a many modes of operation.  One mode is called "Independent-Pairs Display" in the manual, where the input to the left vertical plug-in is displayed using the B horizontal timebase plug-in, and the input to the right vertical plug-in is displayed using the A horizontal timebase plug-in.  This resembles the trace-slaving "ALT" mode that is produced by a 1A4 in a 547.  Many other modes are available.  It is possible to put vertical plug-ins in the horizontal slots for X-Y operation.  It is even possible to put a horizontal plug-in in one of the vertical slots to produce a raster scan.  The CRT has distributed vertical deflection plates.  
==Years made==
1974 — 1992


==Specifications==
==Specifications==


* bandwidth: 500 MHz
* Bandwidth: 500 MHz
* acceleration voltage: 24 kV
* Fastest calibrated sweep: 500 ps/div (with [[7B92A]])
* fastest calibrated sweep: 500 ps/div (with [[7B92A]])
* Acceleration voltage: 24 kV
 
==Manuals==
 
* [http://bama.edebris.com/download/tek/7904/Tektronix_7904_Service_May1983.pdf Tektronix 7904 Manual (PDF)]
* [http://www.ko4bb.com/Manuals/Tektronix/Tektronix_-_7904A/7904a-service-1990.djvu Tektronix 7904A Manual (DjVu)]
* [http://w140.com/Tektronix_7904A_OCRed_by_Tabalabs.pdf Tektronix 7904A Manual (Shannon Hill PDF with OCR)]
* [http://w140.com/Tek_7904_OCRed_by_Tabalabs.pdf Tektronix 7904 Manual (Shannon Hill PDF with OCR)]
* [http://w140.com/Tek_7904_Power_Supply.pdf Servicing the 7904 High-Efficiency Power Supply (PDF)]


==Links==
==Links==


* http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7904.htm
* [http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7904.htm Tek 7904 page at amplifier.cd]
* http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7904A.htm
* [http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7904A.htm Tek 7904A page at amplifier.cd]


==Pictures==
==Pictures==
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Image:7904 interface 1.jpg|Plug-in interface board front
Image:7904 interface 1.jpg|Plug-in interface board front
Image:7904 interface 2.jpg|Plug-in interface board rear
Image:7904 interface 2.jpg|Plug-in interface board rear
Image:7904_block.gif|7904 block diagram
</gallery>
</gallery>


Revision as of 07:13, 6 May 2014

{{{manufacturer}}} 
500MHz non-storage mainframe
Tektronix 7904A

Produced from to

Manuals
Manuals – Specifications – Links – Pictures

The 7904 is a 500MHz mainframe with four bays. It accepts two 7000-series vertical plug-ins and two 7000-series horizontal plug-ins.

Performance is largely determined by the plug-ins. The 7904 makes extensive use of custom integrated circuits and hybrid circuits. The signal path is completely differential and all of the internal wiring is 50-ohm coax.

The 7904 has a many modes of operation. One mode is called "Independent-Pairs Display" in the manual, where the input to the left vertical plug-in is displayed using the B horizontal timebase plug-in, and the input to the right vertical plug-in is displayed using the A horizontal timebase plug-in. This resembles the trace-slaving "ALT" mode that is produced by a 1A4 in a 547. Many other modes are available. It is possible to put vertical plug-ins in the horizontal slots for X-Y operation. It is even possible to put a horizontal plug-in in one of the vertical slots to produce a raster scan. The CRT has distributed vertical deflection plates.

Specifications

  • Bandwidth: 500 MHz
  • Fastest calibrated sweep: 500 ps/div (with 7B92A)
  • Acceleration voltage: 24 kV

Links

Pictures

  • 7904 w Plugin

    7904 w Plugin

  • 7904A

    7904A

  • Plug-in interface board front

    Plug-in interface board front

  • Plug-in interface board rear

    Plug-in interface board rear

  • 7904 block diagram

    7904 block diagram


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