Difference between revisions of "N"

From TekWiki
Jump to: navigation, search
Line 13: Line 13:
 
* [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]]. It was the first sampler produced by Tektronix.   
+
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.   
  
Line 19: Line 20:
 
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. The oscilloscope is  
+
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 input signal
+
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. It uses a single diode, the "interrogate diode", D5480. The strobe pulse is added to the  
+
The sampling circuit of the Type N is primitive.
input signal using a passive summing circuit. Consequently, the amplitude of the kick-out pulse from the input is high, about 150 mV.
+
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. In practice,  
+
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. Using an input attenuator also has  
+
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>

Revision as of 07:42, 4 February 2018

Manuals – Specifications – Links – Pictures

The Tektronix Type N is a sampling plug-in for 500-series scopes. It was the first sampler produced by Tektronix. Its risetime is specified to be under 600 picoseconds.

Type N was introduced in 1960, superseded by the Type 661 Sampling Oscilloscope system a year later, and discontinued in 1964.

Type N is a complete sampling subsystem, using the 500-series oscilloscope just as a power supply and a display. 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. The input signal is applied through a 50 Ω GR-874 connector.

The sampling circuit of the Type N is primitive. 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. In practice, attenuators can be placed in the signal path, external to the Type N, to achieve the desired sensitivity. 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),

The engineer behind the N was Norm Winningstad. 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)

For calibration of the timebase of the Type N, the 013-028 Timing Standard was produced.

Specifications

  • Rise time: 600 ps (Bandwidth ~580 MHz)
  • Deflection: 10 mV/Div (fixed)

Pictures