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The Tektronix Type D is a plug-in for [[500-series scopes]]. | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
|series=500-series scopes | |||
|type=Type D | |||
|summary=Differential amplifier | |||
|image=Tek type d front.jpg | |||
|caption=D front view | |||
|introduced=1954 | |||
|discontinued=1969 | |||
|designers=Rodgers Jenkins | |||
|manuals= | |||
* [[Media:070-228.pdf|Tektronix Type D Manual]] (bad-OCR) | |||
* [[Media:tek_type_d_fcp.pdf|Tektronix Type D Factory Calibration Procedure]] (OCR) | |||
* [[Media:Tek type d cal outline.pdf|Tektronix Type D Calibration Outline]] (OCR) | |||
<!-- * [http://w140.com/tek_fcp/tek_type_d_factory_cal_proc.pdf Cal procedure] | |||
* [http://bama.edebris.com/manuals/tek/d/ Type D manual @ BAMA] --> | |||
}} | |||
The '''Tektronix Type D''' is a differential amplifier plug-in for [[500-series scopes]]. | |||
It was designed by [[Rodgers Jenkins]]. | |||
Type D was the most sensitive plug-in of the original four. | |||
ranging from | The bandwidth depends on the gain, ranging from 2 MHz at 50 mV/div to 300 kHz at 1 mV/div. | ||
There are two axes of sensitivity setting: a decade attenuator in front of a gain switch. | |||
This scheme would be reprised in Type [[W]]. | |||
It displays the difference between two input signals, with a common-mode rejection ratio of 10,000. | |||
It has six tubes, on a shock-mounted subchassis to avoid microphonics. | |||
of | |||
Along with Types [[A]], [[B]], and [[C]], Type D was introduced with the [[531]] and [[535]] in [[introduced in 1954|1954]]. | |||
At the time it was called Type 53D. | |||
It was briefly renamed 53D/54D in 1955 with the introduction of the [[541]] and [[545]]. This quickly changed to 53/54D, and finally shortened to just "D" in 1959 with the introduction of the 5xxA scopes. | |||
Its final year in the catalog was 1968; it had been superseded by Type [[1A6]]. | |||
[[K]], [[L]], and [[T]] are tied for longest production life, at 16 years. | |||
[[B]], [[D]], and [[G]] are next at 15 years. | |||
[[Lavoie Laboratories]] produced an unauthorized clone, the [[Lavoie LA-265-D]]. | |||
{{BeginSpecs}} | |||
{{Spec | Deflection | 1 mV/Div to 50 V/Div in 1–2–5-10-20-50 sequence and 1-10-100-1000 sequence }} | |||
{{Spec | Input impedance | 1 MΩ // 47 pF (either input) }} | |||
{{Spec | Bandwidth | 2 MHz with MV/CM MULTIPLIER set to 50; 300kHz with MV/CM MULTIPLIER set to 1 }} | |||
{{Spec | CMRR | 10000:1 with MILLIVOLTS/CM set to 1, 1000:1 otherwise }} | |||
{{Spec | Signal ranges | }} | |||
{| class="wikitable" border=1 style="margin-left: 8em;" | | |||
!Range | |||
! Common mode dynamic range* | |||
|- | |||
| MILLIVOLTS/CM = 1 || ±2.5 V | |||
|- | |||
| MILLIVOLTS/CM = 10 || ±25 V | |||
|- | |||
| MILLIVOLTS/CM = 100 || ±250 V | |||
|- | |||
| MILLIVOLTS/CM = 1000 || ±500 V | |||
|- | |||
|} | |||
* In practice, Type D behaves well up to about +/–15V if the CM signal is either a brief excursion or a constant. If the CM varies slowly, DC shift in the input tubes will degrade CMRR. | |||
{{EndSpecs}} | |||
==Links== | |||
{{Documents|Link=D}} | |||
==Internals== | |||
Instruments below serial number 3462 used a pair of [[5814]] tubes at the input; later production used [[12AU7]]'s. | |||
These two tube types have different heater currents, and because the heaters are series-wired, you cannot switch from one type to the other without circuit modification. | |||
==Pictures== | |||
<gallery> | <gallery> | ||
D.jpeg | |||
D 1.JPG|Front | |||
D 1.JPG.JPG| Chassis | |||
D 3.JPG| Rubber support for elimination of microphonics | |||
D 4.JPG| Chassis bottom | |||
Tek d early schem.png|Early Schematic | |||
Tek d late schem.png|Late Schematic | |||
Tek d late attenuators.png|Late Attenuators | |||
Tek type d front.jpg|Front View (vertical position knob not original) | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|D}} | |||
[[Category:500 series plugins]] | |||
[[Category:Differential amplifiers]] |