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{{Oscilloscope Sidebar| | {{Oscilloscope Sidebar | ||
|manufacturer=Tektronix | |||
image=Tek7844-front.jpg| | |series=7000-series scopes | ||
caption= | | |model=7844 | ||
introduced= | |summary=400 MHz dual-beam non-storage mainframe | ||
discontinued=1988 | | |image=Tek7844-front.jpg | ||
|caption= | |||
|introduced=1974 | |||
manuals= | |discontinued=1988 | ||
* [http://w140.com/mmm/tek-7844.pdf Tektronix 7844 Service Manual (October 1981 Revision, 265MB, PDF)] | |designers=Murlan Kaufman;Chuck Scott;Dick Anderson;Keith Taylor;Bob White | ||
|manuals= | |||
* [http://w140.com/mmm/tek-7844.pdf Tektronix 7844 Service Manual (October 1981 Revision, 070-1676-02 265MB, PDF)] | |||
* [http://exodus.poly.edu/~kurt/manuals/manuals/Tektronix/TEK%207844%20R7844%20Instruction.pdf 7844/R7844 Operator's Manual] (Rev. 11/1981, PDF, 3 MB) | * [http://exodus.poly.edu/~kurt/manuals/manuals/Tektronix/TEK%207844%20R7844%20Instruction.pdf 7844/R7844 Operator's Manual] (Rev. 11/1981, PDF, 3 MB) | ||
* [http://bama.edebris.com/manuals/tek/7844/ Tek 7844 Service Manual] at BAMA (Rev. 02/ | * [http://bama.edebris.com/manuals/tek/7844/ Tek 7844 Service Manual] at BAMA (Rev. 02/Oct 1981, 070-1676-02 PDF, 109 MB) | ||
}} | }} | ||
The '''Tektronix 7844''' is a 400 MHz [[dual-beam scopes|dual-beam CRT oscilloscope]] | The '''Tektronix 7844''' is a 400 MHz [[dual-beam scopes|dual-beam CRT oscilloscope]] | ||
that takes two 7000-series vertical plug-ins and two 7000-series horizontal plug-ins. | that takes two 7000-series vertical plug-ins and two 7000-series horizontal plug-ins. | ||
Circuit design for the 7844 was done by [[Chuck Scott]], [[Dick Anderson]], [[Keith Taylor]], and [[Bob White]]. | Circuit design for the 7844 was done by [[Chuck Scott]], [[Dick Anderson]], [[Keith Taylor]], and [[Bob White]]. | ||
Project manager for the 7844 was [[Murlan Kaufman]]. | |||
Versions include the 7844 bench-top lab scope and R7844 rack-mount model. | Versions include the 7844 bench-top lab scope and R7844 rack-mount model. | ||
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{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Bandwidth | 400 MHz with [[7A19]], [[7A29]] (eq. 0.9 ns rise time), 300 MHz with [[7A24]] }} | {{Spec | Bandwidth | 400 MHz with [[7A19]], [[7A29]] (eq. 0.9 ns rise time), 300 MHz with [[7A24]] }} | ||
{{Spec | Fastest calibrated sweep | 1 ns (with [[7B80]], [[7B85]], [[7B92A]]) }} | {{Spec | Fastest calibrated sweep | 1 ns/Div (with [[7B80]], [[7B85]], [[7B92A]]) }} | ||
{{Spec | Beam isolation | > 100:1 from DC to 150 MHz, > 30:1 from 150 MHz to 400 MHz }} | {{Spec | Beam isolation | > 100:1 from DC to 150 MHz, > 30:1 from 150 MHz to 400 MHz }} | ||
{{Spec | X-Y Phase Shift | < 2° from DC to min. 50 kHz }} | {{Spec | X-Y Phase Shift | < 2° from DC to min. 50 kHz }} | ||
{{Spec | Horizontal bandwidth | DC to at least 1 MHz }} | {{Spec | Horizontal bandwidth | DC to at least 1 MHz }} | ||
{{Spec | Z axis input | 2 V<sub>p-p</sub> for full intensity range (positive decreases), input impedance 500 Ω, rise time 15 ns, max. 1 MHz }} | {{Spec | Z axis input | 2 V<sub>p-p</sub> for full intensity range (positive decreases), input impedance 500 Ω, rise time 15 ns, max. 1 MHz }} | ||
{{Spec | CRT | [[T7840]] | {{Spec | CRT | [[T7840]], p/n [[154-0713-00]] with P31 phosphor, or [[154-0713-04]] with P11 phosphor (Opt. 78), acceleration 24 kV (−3/+21) }} | ||
{{Spec | Calibrator | 4 mV, 40 mV, 400 mV or 4 V into >100 kΩ, 0.4 mV, 4 mV, 40 mV or 400 mV into 50 Ω; 1 kHz }} | {{Spec | Calibrator | 4 mV, 40 mV, 400 mV or 4 V into >100 kΩ, 0.4 mV, 4 mV, 40 mV or 400 mV into 50 Ω; 1 kHz }} | ||
{{Spec | Power | 90-132 V or 180-264 V, 48 to 440 Hz, max. 235 W }} | {{Spec | Power | 90-132 V or 180-264 V, 48 to 440 Hz, max. 235 W }} | ||
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==Links== | ==Links== | ||
* [[Media:Tekscope_1974_V6_N4.pdf | A 400 MHz dual-beam oscilloscope. Tekscope Vol.6 No.4, Sept/Oct 1974]] | |||
* [http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7844.html Tek 7844 page at amplifier.cd] and a [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/rep-und-kal/7844_reparatur_engl.html repair report (switch-mode PSU)] | * [http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7844.html Tek 7844 page at amplifier.cd] and a [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/rep-und-kal/7844_reparatur_engl.html repair report (switch-mode PSU)] | ||
* [http://www.barrytech.com/tektronix/tek7000/tek7844.html Tek 7844 @ barrytech.com] | * [http://www.barrytech.com/tektronix/tek7000/tek7844.html Tek 7844 @ barrytech.com] | ||
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Tek7844-front.jpg | Tektronix 7844 front view | Tek7844-front.jpg | Tektronix 7844 front view | ||
Tek7844-rear.jpg | Tektronix 7844 rear view | Tek7844-rear.jpg | Tektronix 7844 rear view | ||
Tek 7844 with 7d15.JPG | |||
7844-3.jpg | Simultaneous time and frequency domain display using a [[7A26]] amplifier, [[7B92A]] time base, and [[7L5]] Spectrum Analyzer | 7844-3.jpg | Simultaneous time and frequency domain display using a [[7A26]] amplifier, [[7B92A]] time base, and [[7L5]] Spectrum Analyzer | ||
Tektronix 7844.JPG | Tektronix 7844 front view (with [[7A26]], [[7A19]](?), [[7B80]] and [[7B85]]) | Tektronix 7844.JPG | Tektronix 7844 front view (with [[7A26]], [[7A19]](?), [[7B80]] and [[7B85]]) | ||
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==Interior== | ==Interior== | ||
<gallery> | <gallery> | ||
Tek7844-right.jpg | Right interior. Top row: Calibrator board (l), [[7000 series readout system|readout board]] (c), beam 2 | Tek7844-right.jpg | Right interior. Top row: Calibrator board (l), [[7000 series readout system|readout board]] (c), beam 2 vertical amplifier (r), fan. | ||
Tek7844-right-above.jpg | Right/above interior. The dual delay lines can be seen behind the readout board. Horizontally mounted boards in the center are: Crossover mode switch (l), trigger selector (c), power supply (r). | Tek7844-right-above.jpg | Right/above interior. The dual delay lines can be seen behind the readout board. Horizontally mounted boards in the center are: Crossover mode switch (l), trigger selector (c), power supply (r). | ||
Tek7844-v-b2.jpg | Beam 2 vertical amplifier, CRT and termination detail (right side) | Tek7844-v-b2.jpg | Beam 2 vertical amplifier, CRT and termination detail (right side) | ||
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Tek-7844-vmode-back-detail.jpg | Vertical mode switch board, back side (detail) | Tek-7844-vmode-back-detail.jpg | Vertical mode switch board, back side (detail) | ||
</gallery> | </gallery> | ||
{{Custom ICs|7844}} | |||
{{Custom ICs|7000 series readout system}} | |||
[[Category:7000 series non-storage mainframes]] | [[Category:7000 series non-storage mainframes]] | ||
[[Category:Dual beam scopes]] | [[Category:Dual beam scopes]] | ||