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The Tektronix 7250 is | {{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(?) | |||
The input is through a | |designers= | ||
rather than being terminated internally. The captured waveform can be transferred | |manuals= | ||
to a computer via | * [[Media:070-6401-01.pdf|Tektronix 7250 Operators Manual]] | ||
conventional computer-style CRT display and has menus. | * [[Media:070-7133-00.pdf|Tektronix 7250 Service Manual]] | ||
At 132 pounds, it is the heaviest one-piece oscilloscope ever sold by Tektronix. | * [[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, | |||
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 | 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. | ||
{{BeginSpecs}} | |||
{{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 }} | |||
{{SpecGroup | 7250 Opt. 01 External Delay Line }} | |||
{{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}} | |||
==Links== | |||
* [https://www.youtube.com/watch?v=fS6WOx5X8zM Tektronix 7250 advertising video, 1987] (VintageTEK Museum @ YouTube) | |||
==Prices== | |||
{| class="wikitable" | |||
|- | |||
! | |||
! 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== | |||
The 7250 has two 3. | 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. | ||
==Pictures== | |||
<gallery> | <gallery> | ||
7250_front.jpg | Front | |||
7250_front_inside.jpg | Front inside | |||
7250_rear_panel.jpg | Rear | |||
7250_rear_inside.jpg | Rear inside | |||
7250 memory.JPG | Memory board | |||
</gallery> | </gallery> | ||
[[Category:Digital storage scopes]] | |||
[[Category:Scan converter based instruments]] | |||
[[Category:Micro-channel plate CRTs]] | |||
[[Category:GPIB interface]] |