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The Tektronix 7250 is a digitizing oscilloscope with 6 GHz bandwidth.   
{{Oscilloscope Sidebar
It uses a [[scan converter]] CRT for digitizing.  From the scan converter,
|manufacturer=Tektronix
the trace is transferred to memory boards conventional RAM.
|series=
|model=7250
|summary=6 GHz Transient Digitizer
|image=7250_front.jpg 
|caption=Tektronix 7250 aka Intertechnique IN7000
|introduced=1986     
|discontinued=1992(?) 
|designers=
|manuals=
* [[Media:070-6401-01.pdf|Tektronix 7250 Operators Manual]]
* [[Media:070-7133-00.pdf|Tektronix 7250 Service Manual]]
* [[Media:Tek 7250 schem no ocr.pdf|Tektronix 7250 Schematics]]
* [https://w140.com/tektronix_7250.pdf Tektronix 7250 Catalog Entry]
* [[Patent US 4147988A|US Patent 4,147,988 Describing the Technology Used in the 7250]]
* [https://w140.com/7250_2008.06.09.10.37.12_5125_EN.zip Basic Code for GPIB Access to 7250]
}}
The '''Tektronix 7250''' is a digitizing oscilloscope with 6 GHz bandwidth, optimized for digitizing single-shot events.   
It uses a [[scan converter]] CRT for digitizing.  From the scan converter, the trace is transferred to memory boards containing conventional RAM.


The input is through a 50 Ω [[N connector]] on the rear panel, which loops through,
The input is through a 50 Ω [[N connector]] on the rear panel, which loops through,
rather than being terminated internally.  The captured waveform can be transferred
rather than being terminated internally.  Like in the [[519]], there is no vertical amplifier.
to a computer via a [[GPIB interface]] or can be viewed on the built-in monitor, which is a
conventional computer-style CRT display and has menus.  


At 132 pounds, it is the heaviest one-piece oscilloscope ever sold by Tektronix.
The captured waveform can be transferred to a computer via a [[GPIB interface]] or can be viewed on the built-in monitor,
which is a conventional computer-style CRT display and has menus.
 
At 60 kg (132 pounds), it is the heaviest one-piece oscilloscope ever sold by Tektronix.
It was made by Intertechnique in France where it was sold as the IN7000, and  
It was made by Intertechnique in France where it was sold as the IN7000, and  
rebranded by Tektronix for sale in the United States.
rebranded by Tektronix for sale in the United States.


==Specifications==
{{BeginSpecs}}
[[Category:Specifications needed]]
{{SpecGroup | 7250 mainframe }}
{{Spec | Bandwidth | 6 GHz (measured as -3 dB @ 7 GHz, -6 dB @ 9.6 GHz, and -8.5 dB @ 14 GHz in Haas, Warman, van Ewijk, Rev. Sci. Instrum. 60 (3), March 1989) }}
{{Spec | Rise time | 50 ps }}
{{Spec | Resolution | Vertical, 11 bits. The digitizer captures 512 samples in one shot. }}
{{Spec | Sweep | 1 μs/Div to 50 ps/Div (1-2-5), equivalent to max. ~1 terasample per second }}
{{Spec | Sensitivity | fixed 500 mV/Div (no vertical amplifiers in the signal path) }}
{{Spec | Max. input | 2 kV spikes < 1 μs }}
{{Spec | Triggering | External only, requires 50 ns pretrigger signal }}


Frequency response of a 7250 has been measured as -3 dB @ 7 GHz, -6 dB @ 9.6 GHz, and -8.5 dB @ 14 GHz.
{{SpecGroup | 7250 Opt. 01 External Delay Line }}
(Haas, Warman, van Ewijk, Rev. Sci. Instrum. 60 (3), March 1989)
{{Spec | Bandwidth  | 4.5 GHz  }}
{{Spec | Rise time  | ≤75 ps }}
{{Spec | Delay      | 55 ns }}
{{Spec | Attenuation | 4.5 dB }}
{{Spec | Input / output | 50 Ω N connectors }}
{{Spec | Trigger pickoff | 20 dB attenuation, 300 ps rise time, [[BNC connector]] }}
{{EndSpecs}}


Vertical resolution is 11 bits. The digitizer captures 512 samples in one shot.
==Links==
The fastest sweep is 50 ps/Div, approximately 1 terasample per second. Sensitivity is 500 mV/Div.
* [https://www.youtube.com/watch?v=fS6WOx5X8zM Tektronix 7250 advertising video, 1987] (VintageTEK Museum @ YouTube)


Due to the absence of vertical amplifiers in the signal path, the 7250 can handle
==Prices==
2 kV spikes without damage.
{| class="wikitable"
|-
! &nbsp;
! Year
! 1988
! 1990
|-
!rowspan=2| 7250
! Catalog price
|align=right| $99,995
|align=right| $104,000
|-
! 2016 value
|align=right| $204,000
|align=right| $192,000
|-
!rowspan=2| Opt. 01 Ext. Delay Line
! Catalog price
|align=right| $12,500
|align=right| $12,500
|-
! 2016 value
|align=right| $25,500
|align=right| $23,000
|}
==Issues==
==Issues==


The 7250 has two 3.6 V 1/2AA lithium batteries on each memory board.  With time, these  
The 7250 has two 3.6 V ½AA lithium batteries on each memory board.  With time, these  
batteries die, which will cause the 7250 to fail its power-on self test.  New replacements
batteries die, which will cause the 7250 to fail its power-on self test.  New replacements
are still (2011) widely available.
are still (2011) widely available.
==Manuals==
* [http://w140.com/tek_7250.pdf Tektronix 7250 Manual (PDF)]
* [http://w140.com/tektronix_7250.pdf Tektronix 7250 Catalog Entry (PDF)]
* [http://w140.com/US4147988.pdf US Patent 4147988 Describing the Technology Used in the 7250 (PDF)]
* [http://w140.com/7250_2008.06.09.10.37.12_5125_EN.zip Basic Code for GPIB Access to 7250]


==Pictures==
==Pictures==


<gallery>
<gallery>
Image:7250_front.jpg|Front.
Tek 7250 trace.jpg    | Trace
Image:7250_front_inside.jpg|Front inside.
Tek 7250 menu.jpg    | Menu
Image:7250_rear_panel.jpg|Rear.
7250_front.jpg       | Front
Image:7250_rear_inside.jpg|Rear inside.
7250_front_inside.jpg | Front inside
Image:7250 memory.JPG|Memory board.
7250_rear_panel.jpg   | Rear
7250_rear_inside.jpg | Rear inside
7250 memory.JPG       | Memory board
</gallery>
</gallery>


==Components==
{{Parts|7250}}


[[Category:Digital storage scopes]]
[[Category:Digital storage scopes]]
 
[[Category:Scan converter based instruments]]
[[Category:Micro-channel plate CRTs]]
[[Category:GPIB interface]]
[[Category:GPIB interface]]

Latest revision as of 05:12, 15 July 2024

Tektronix 7250
6 GHz Transient Digitizer
Tektronix 7250 aka Intertechnique IN7000

Produced from 1986 to 1992(?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 7250 is a digitizing oscilloscope with 6 GHz bandwidth, optimized for digitizing single-shot events. It uses a scan converter CRT for digitizing. From the scan converter, the trace is transferred to memory boards containing conventional RAM.

The input is through a 50 Ω N connector on the rear panel, which loops through, rather than being terminated internally. Like in the 519, there is no vertical amplifier.

The captured waveform can be transferred to a computer via a GPIB interface or can be viewed on the built-in monitor, which is a conventional computer-style CRT display and has menus.

At 60 kg (132 pounds), it is the heaviest one-piece oscilloscope ever sold by Tektronix. It was made by Intertechnique in France where it was sold as the IN7000, and rebranded by Tektronix for sale in the United States.

Key Specifications

     — 7250 mainframe —
Bandwidth 6 GHz (measured as -3 dB @ 7 GHz, -6 dB @ 9.6 GHz, and -8.5 dB @ 14 GHz in Haas, Warman, van Ewijk, Rev. Sci. Instrum. 60 (3), March 1989)
Rise time 50 ps
Resolution Vertical, 11 bits. The digitizer captures 512 samples in one shot.
Sweep 1 μs/Div to 50 ps/Div (1-2-5), equivalent to max. ~1 terasample per second
Sensitivity fixed 500 mV/Div (no vertical amplifiers in the signal path)
Max. input 2 kV spikes < 1 μs
Triggering External only, requires 50 ns pretrigger signal
     — 7250 Opt. 01 External Delay Line —
Bandwidth 4.5 GHz
Rise time ≤75 ps
Delay 55 ns
Attenuation 4.5 dB
Input / output 50 Ω N connectors
Trigger pickoff 20 dB attenuation, 300 ps rise time, BNC connector

Links

Prices

  Year 1988 1990
7250 Catalog price $99,995 $104,000
2016 value $204,000 $192,000
Opt. 01 Ext. Delay Line Catalog price $12,500 $12,500
2016 value $25,500 $23,000

Issues

The 7250 has two 3.6 V ½AA lithium batteries on each memory board. With time, these batteries die, which will cause the 7250 to fail its power-on self test. New replacements are still (2011) widely available.

Pictures

  • Trace

    Trace

  • Menu

    Menu

  • Front

    Front

  • Front inside

    Front inside

  • Rear

    Rear

  • Rear inside

    Rear inside

  • Memory board

    Memory board

Components

Some Parts Used in the 7250

Part Part Number(s) Class Description Used in
EF9366 Monolithic integrated circuit Graphics display controller 7250
MC68488 156-1246-00 Monolithic integrated circuit GPIB controller 7250 • 7854 • CG551AP • CG5001 • CG5010 • CG5011 • Keithley 181 • Keithley 192
Motorola 6800 156-0426-00 • 156-2413-00 • 156-5472-01 Monolithic integrated circuit 8-bit microprocessor 021-0206-00 • 021-0374-00 • 067-0902-00 • 067-1137-99 • 222 • 222A • 222PS • 2424L • 2445 • 2465 • 2467 • 4051 • 7250 • 7912 • 7912AD • 7A16P • 7A29P • 7B81P • 7B90P • 833 • 834 • 835 • 836 • CG5001 • CG551AP • CG5010 • CG5011 • DF1 • DF2 • DM5010 • FG5010 • MI5010 • SI5010 • PS5004 • PS5010 • SG5010 • Keithley 181 • Keithley 175 • Keithley 175A • Keithley 191 • Keithley 192 • Keithley 195 • Keithley 195A • Keithley 197 • Keithley 220 • Keithley 224 • Keithley 230 • Keithley 263 • Keithley 485 • Keithley 580 • Keithley 617
Motorola 6821 156-0427-03 • 156-1205-00 Monolithic integrated circuit "Peripheral Interface Adapter (PIA)" 067-1137-99 • 4052 • 4052A • 4054 • 4054A • Keithley 191 • 7250 • 7A16P • 7A29P • 7B90P • CG551AP • CG5001 • CG5010 • CG5011
TL494 Monolithic integrated circuit PWM switch-mode controller 2225 • 7250
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