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* [http://w140.com/tek_fcp/tek_type_n_factory_cal_proc.pdf Tektronix Type N Factory Calibration Procedure (PDF)] | * [http://w140.com/tek_fcp/tek_type_n_factory_cal_proc.pdf Tektronix Type N Factory Calibration Procedure (PDF)] | ||
}} | }} | ||
The '''Tektronix Type N''' is a [[sampling_oscilloscope|sampling]] plug-in for [[500-series scopes]]. | The '''Tektronix Type N''' is a [[sampling_oscilloscope|sampling]] plug-in for [[500-series scopes]]. | ||
It was the first sampler produced by Tektronix. | |||
Its risetime is specified to be under 600 picoseconds. | Its risetime is specified to be under 600 picoseconds. | ||
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and discontinued in 1964. | and discontinued in 1964. | ||
Type N is a complete sampling subsystem, using the 500-series oscilloscope just as a power supply and a display. | Type N is a complete sampling subsystem, using the 500-series oscilloscope just as a power supply and a display. | ||
operated in X-Y mode and gets its horizontal signal from the Type N plug-in instead of from the scope's sweep circuitry. | The oscilloscope is operated in X-Y mode and gets its horizontal signal from the Type N plug-in instead of from the scope's sweep circuitry. | ||
is applied through a 50 Ω [[GR-874 connector]]. | The input signal is applied through a 50 Ω [[GR-874 connector]]. | ||
The sampling circuit of the Type N is primitive. | The sampling circuit of the Type N is primitive. | ||
input signal using a passive summing circuit. | It uses a single diode, the "interrogate diode", D5480. | ||
The strobe pulse is added to the input signal using a passive summing circuit. | |||
Consequently, the amplitude of the kick-out pulse from the input is high, about 150 mV. | |||
The vertical scale of the Type N is fixed at 10 mV/cm, making Type N one of the few Tektronix plug-ins with fixed vertical gain. | The vertical scale of the Type N is fixed at 10 mV/cm, making Type N one of the few Tektronix plug-ins with fixed vertical gain. | ||
attenuators can be placed in the signal path, external to the Type N, to achieve the desired sensitivity. | In practice, attenuators can be placed in the signal path, external to the Type N, to achieve the desired sensitivity. | ||
the effect of attenuating the kick-out pulse seen by the device under test. | Using an input attenuator also has the effect of attenuating the kick-out pulse seen by the device under test. | ||
According to Stefan Graef (http://www.messmuseum.de/tek661.htm), | According to Stefan Graef (http://www.messmuseum.de/tek661.htm), | ||
<blockquote> | <blockquote> | ||
The engineer behind the N was [[Norm Winningstad]]. He worked at Hughes Aircraft Electronics Division and was offered a job at HP's | The engineer behind the N was [[Norm Winningstad]]. | ||
oscilloscope division to join their Sampling Scope team. After getting informed about the work he went to Tektronix developing the N | He worked at Hughes Aircraft Electronics Division and was offered | ||
a job at HP's oscilloscope division to join their Sampling Scope team. | |||
After getting informed about the work he went to Tektronix developing the N | |||
(according to: "A narrative history of Hewlett-Packard from 1939-1990" by John Minck) | (according to: "A narrative history of Hewlett-Packard from 1939-1990" by John Minck) | ||
</blockquote> | </blockquote> |