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The Type W is a differential comparator plug-in amplifier for [[500-series scopes]].  Its bandwidth varies from 23MHz to 8MHz
The Type W is a differential comparator plug-in amplifier for [[500-series scopes]].   
depending on gain.  Only modestly faster than its predecessor, Type [[Z]], Type W extends performance
Its bandwidth varies from 23MHz to 8MHz
in terms of sensitivity, reaching 1mV/div.  It achieves 20,000 to 1 common-mode rejection at DC and low frequencies.
depending on gain.  Only modestly faster than its predecessor, the Type [[Z]],  
It has a built in precision variable voltage supply, "Vc", which is controlled by a ten-turn pot and can vary from either -1.1V to +1.1V or -11V to +11V.   
the Type W extends performance in terms of sensitivity, reaching 1mV/div.   
Type W has two signal inputs, "A" and "B".  A mode switch selects between displaying A-Vc, A-B, or Vc-B.   
It achieves 20,000 to 1 common-mode rejection at DC and low frequencies.
It has a built in precision variable voltage supply, "Vc",  
which is controlled by a ten-turn pot and can vary from either -1.1V to +1.1V or -11V to +11V.   
Type W has two signal inputs, "A" and "B".   
A mode switch selects between displaying A-Vc, A-B, or Vc-B.   
The "A-B" mode is particularly useful for displaying the current in a sense resistor,  
The "A-B" mode is particularly useful for displaying the current in a sense resistor,  
while the other modes provide "slideback" measurements of small variations superimposed on a large constant.   
while the other modes provide "slideback" measurements of small variations superimposed on a large constant.   
An output of Vc is provided on the front panel of the Type W.  Unlike Type [[Z]],
An output of Vc is provided on the front panel of the Type W.  Unlike the Type [[Z]],
Type W has two gain axes, a decade attenuator and a 1-2-5-10-20-50 selector, reminiscent of Type [[D]] from ten years before.
Type W has two gain axes, a decade attenuator and a 1-2-5-10-20-50 selector,  
reminiscent of Type [[D]] from ten years before.
Type W is the only letter-series plug-in with an "infinite resistance" input mode selectable at the front panel.
Type W is the only letter-series plug-in with an "infinite resistance" input mode selectable at the front panel.
(Type [[1A5]] has an internal jumper that can be cut.)
(Type [[1A5]] has an internal jumper that can be cut.)
   
   
In the letter-series timeline of differential amps, Type W, [[introduced in 1965]], follows Type [[Z]] and precedes Type [[1A5]].
In the letter-series timeline of differential amps, the Type W, [[introduced in 1965]],  
follows the Type [[Z]] and precedes Type [[1A5]].
Types W and [[O]] were "in at the finish", available right up to the discontinuance of the entire classic plug-in scope line in 1974.
Types W and [[O]] were "in at the finish", available right up to the discontinuance of the entire classic plug-in scope line in 1974.



Revision as of 23:54, 16 March 2012

The Type W is a differential comparator plug-in amplifier for 500-series scopes. Its bandwidth varies from 23MHz to 8MHz depending on gain. Only modestly faster than its predecessor, the Type Z, the Type W extends performance in terms of sensitivity, reaching 1mV/div. It achieves 20,000 to 1 common-mode rejection at DC and low frequencies. It has a built in precision variable voltage supply, "Vc", which is controlled by a ten-turn pot and can vary from either -1.1V to +1.1V or -11V to +11V. Type W has two signal inputs, "A" and "B". A mode switch selects between displaying A-Vc, A-B, or Vc-B. The "A-B" mode is particularly useful for displaying the current in a sense resistor, while the other modes provide "slideback" measurements of small variations superimposed on a large constant. An output of Vc is provided on the front panel of the Type W. Unlike the Type Z, Type W has two gain axes, a decade attenuator and a 1-2-5-10-20-50 selector, reminiscent of Type D from ten years before. Type W is the only letter-series plug-in with an "infinite resistance" input mode selectable at the front panel. (Type 1A5 has an internal jumper that can be cut.)

In the letter-series timeline of differential amps, the Type W, introduced in 1965, follows the Type Z and precedes Type 1A5. Types W and O were "in at the finish", available right up to the discontinuance of the entire classic plug-in scope line in 1974.