127: Difference between revisions

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-The Tektronix Type 127 is a power supply, calibrator, and unity-gain preamplifier for
+The Tektronix Type 127 "Preamplifier Power Supply", [[introduced in 1958]],
-two [[letter-series and 1-series plug-ins|letter-series or 1-series plug-ins]].
+is a power supply, calibrator, and unity-gain preamplifier for two
-The Type 127 was [[introduced in 1958]].
+[[letter-series and 1-series plug-ins|letter-series or 1-series plug-ins]].
-It is a rack-mount unit with a power supply that resembles the power supply of an early
-[[500-series scopes|500-series oscilloscope]]: a 50/60Hz transformer, [[selenium rectifiers]],
-a single voltage reference tube controlling
-all output voltages, and [[6080]] pass tubes for the regulated outputs.
-The 127 targets applications where one wants to use Tektronix plug-ins
+It is a rack-mount unit with a power supply that resembles the power supply
-as front-end amplifiers for other instrumentation.
+of an early [[500-series scopes|500-series oscilloscope]]: a 50/60 Hz transformer,
-Since [[letter-series and 1-series plug-ins]] have relatively high output impedance,
+[[selenium rectifiers]], a single voltage reference tube controlling all output
-their outputs
+voltages, and [[6080]] pass tubes for the regulated outputs.
-(i.e., differentially between pins 1 and 3 of the plug-in-to-scope interconnecting plug)
-are not suitable for directly driving long cables.
+The 127 targets applications where one wants to use Tektronix plug-ins as front-end amplifiers
-The 127 provides 20MHz unity gain amplifiers that can
+for other instrumentation.  Since [[letter-series and 1-series plug-ins]] have relatively high
-drive long cables and other low impedance loads.
+output impedance, their outputs (i.e., differentially between pins 1 and 3 of the
-Each of the two amplifiers in the 127 is fully differential and
+plug-in-to-scope interconnecting plug) are not suitable for directly driving long cables.
-outputs are on the front and rear panels.
-The 127 has unity gain if the output is taken differentially and
+The 127 provides 20 MHz unity gain amplifiers that can drive long cables and other low impedance loads.
-the load on each output is 170 ohms.
+Each of the two amplifiers in the 127 is fully differential and outputs are on the front and rear panels.
+The 127 has unity gain if the output is taken differentially and the load on each output is 170 Ω.
 The 127 is a 5U (8.75"/22.2cm) rackmount unit and weighs 37 pounds (16.9kg).
-Maximum power consumption is 450W.
+Maximum power consumption is 450 W.
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 * [http://w140.com/tek_fcp/tek_type_127_factory_cal_proc.pdf Tektronix 127 Factory Calibration Procedure (PDF)]
 * [http://w140.com/tek_127_1968_catalog.pdf Tektronix 127 in 1968 Catalog (PDF)]
+[[Category:500 series scopes]]