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using the 500-series oscilloscope just as a power supply and a display.  The oscilloscope
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
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 connector is a 50-ohm GR-874.
from the scope's sweep circuitry.  The input connector is a 50-ohm  
[[Connectors#GR-874|GR-874]].
The Type N was introduced in 1960, followed by the [[661]] a year later, and discontinued in 1964,
The Type N was introduced in 1960, followed by the [[661]] a year later, and discontinued in 1964,
making it the shortest-lived plug-in.
making it the shortest-lived plug-in.

Revision as of 21:04, 29 April 2011

The Tektronix Type N is a sampling plug-in introduced in 1960 for 500-series scopes. It was the first sampler produced by Tektronix. The risetime is specified to be under 600 picoseconds. The 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 connector is a 50-ohm GR-874. The Type N was introduced in 1960, followed by the 661 a year later, and discontinued in 1964, making it the shortest-lived plug-in.

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 150mV.

The vertical scale of the Type N is 10mV/cm. The Type N is one of the only Tektronix plug-ins with fixed vertical gain.

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