1M1: Difference between revisions

The [[TU-7]]/1M1/[[067-0521-00]] is a letter series plug-in used for calibrating [[500-series scopes]].  It is a multifunction replacement for the Type [[P]] Pulser, the [[TU-2]] Test Load, and the [[EP-53]] Gain Set Adaptor.  It's used for calibrating the mainframe's step response and gain, and checking dual-trace operation, common mode rejection, and power supply regulation.  (500-series mainframes are designed to have 10 div/volt response to differential signals from the plug-in, and zero response to common-mode signals.)

It contains a transistor multivibrator, whose output is sharpened through Tek-made Gallium-Arsenide diodes (later production used silicon), a dual-trace circuit using [[12AT7]] and [[6AL5]] tubes, and various load resistors.

It does not have Type P's short operating life, because it does not use a [[mercury switch]].

This instrument went through several names.  At its [[introduced in 1964|1964]] introduction, it was the TU-7.  Some early Tek-internal instruments for design, manufacturing, and calibration had TU (Test Unit) nomenclature.  (Other examples include the TU-?? Variac, the TU-?? dim-bulb fixture, and the TU-50 sine/square/pulse generator.)  In 1965 it was renamed Type 1M1 to fit into the letter-series nomenclature like its predecessor.  Later still, the 067- calibration fixture naming system took hold and it was rechristened 067-0521-00.  The instrument was also revised once - more pulse frequencies - and the name upgraded to 067-0521-01. It does not appear - under any name - in any Tek catalog I know of, but the 1964 catalog _does_ list a cousin: Type [[10/11M1]], for the Type [[647]] scope.