7250: Difference between revisions
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The Tektronix 7250 is an digitizing oscilloscope with | The Tektronix 7250 is an digitizing oscilloscope with 6 GHz bandwidth. | ||
It uses a [[scan converter]] CRT for digitizing. From the scan converter, | It uses a [[scan converter]] CRT for digitizing. From the scan converter, | ||
the trace is transferred to memory boards conventional RAM. | the trace is transferred to memory boards conventional RAM. | ||
The input is through a 50 Ω [[Connectors#N|N connector]] on the rear panel, which loops through, | |||
The input is through a | |||
rather than being terminated internally. The captured waveform can be transferred | rather than being terminated internally. The captured waveform can be transferred | ||
to a computer via | 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. | conventional computer-style CRT display and has menus. | ||
At 132 pounds, it is the heaviest one-piece oscilloscope ever sold by Tektronix. | At 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. | ||
Frequency response of a 7250 has been measured as - | ==Specifications== | ||
[[Category:Specifications needed]] | |||
Frequency response of a 7250 has been measured as -3 dB @ 7 GHz, -6 dB @ 9.6 GHz, and -8.5 dB @ 14 GHz. | |||
(Haas, Warman, van Ewijk, Rev. Sci. Instrum. 60 (3), March 1989) | (Haas, Warman, van Ewijk, Rev. Sci. Instrum. 60 (3), March 1989) | ||
The 7250 has two 3. | Vertical resolution is 11 bits. The digitizer captures 512 samples in one shot. | ||
The fastest sweep is 50 ps/Div, approximately 1 terasample per second. Sensitivity is 500 mV/Div. | |||
Due to the absence of vertical amplifiers in the signal path, the 7250 can handle | |||
2 kV spikes without damage. | |||
==Issues== | |||
The 7250 has two 3.6 V 1/2AA 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/tek_7250.pdf Tektronix 7250 Manual (PDF)] | ||
* [http://w140.com/tektronix_7250.pdf Tektronix 7250 Catalog Entry (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/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] | * [http://w140.com/7250_2008.06.09.10.37.12_5125_EN.zip Basic Code for GPIB Access to 7250] | ||
==Pictures== | |||
<gallery> | <gallery> | ||
| Line 35: | Line 44: | ||
Image:7250 memory.JPG|Memory board. | Image:7250 memory.JPG|Memory board. | ||
</gallery> | </gallery> | ||
[[Category:GPIB interface]] | |||
Revision as of 11:03, 16 June 2014
The Tektronix 7250 is an digitizing oscilloscope with 6 GHz bandwidth. It uses a scan converter CRT for digitizing. From the scan converter, the trace is transferred to memory boards conventional RAM.
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 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. It was made by Intertechnique in France where it was sold as the IN7000, and rebranded by Tektronix for sale in the United States.
Specifications
Frequency response of a 7250 has been measured as -3 dB @ 7 GHz, -6 dB @ 9.6 GHz, and -8.5 dB @ 14 GHz. (Haas, Warman, van Ewijk, Rev. Sci. Instrum. 60 (3), March 1989)
Vertical resolution is 11 bits. The digitizer captures 512 samples in one shot. The fastest sweep is 50 ps/Div, approximately 1 terasample per second. Sensitivity is 500 mV/Div.
Due to the absence of vertical amplifiers in the signal path, the 7250 can handle 2 kV spikes without damage.
Issues
The 7250 has two 3.6 V 1/2AA 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.
Manuals
- Tektronix 7250 Manual (PDF)
- Tektronix 7250 Catalog Entry (PDF)
- US Patent 4147988 Describing the Technology Used in the 7250 (PDF)
- Basic Code for GPIB Access to 7250
Pictures
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Front.
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Front inside.
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Rear.
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Rear inside.
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Memory board.
