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The '''Tektronix Type W''' is a differential comparator plug-in amplifier for [[500-series scopes]]. | The '''Tektronix Type W''' is a differential comparator plug-in amplifier for [[500-series scopes]]. | ||
Its bandwidth varies from 23 MHz to 8 MHz depending on gain. | Its bandwidth varies from 23 MHz to 8 MHz depending on gain. Type W is | ||
faster than its [[Z|Type Z]] predecessor, | faster than its [[Z|Type Z]] predecessor, and it extends performance in | ||
terms of sensitivity, reaching 1 mV/div | terms of sensitivity, reaching 1 mV/div. It achieves 20,000 to 1 common-mode | ||
rejection at DC and low frequencies. | rejection at DC and low frequencies. | ||
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An output of V<sub>C</sub> is provided on the front panel for precision measurements. | An output of V<sub>C</sub> is provided on the front panel for precision measurements. | ||
Unlike the Type Z, Type W has two gain axes | Unlike the Type Z, Type W has two gain axes: a decade attenuator and a 1−2−5−10−20−50 selector, | ||
reminiscent of [[D|Type D]] from ten years before. | reminiscent of [[D|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. | ||
([[1A5|Type 1A5]] has an internal jumper that can be cut.) | ([[1A5|Type 1A5]] has an internal jumper that can be cut.) | ||
Original production uses a pair of type [[8056]] [[Nuvistor|Nuvistors]] in the front end; starting at serial number 7000 these were replaced with JFETs. | |||
In the letter-series timeline of differential comparators, Type W, [[introduced in 1965]], | In the letter-series timeline of differential comparators, Type W, [[introduced in 1965]], | ||