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The '''Tektronix 281 TDR Pulser''' is an accessory that | {{Instrument Sidebar | ||
plugs into the probe power jack on [[1S1]], [[3S1]], and [[4S1]] plug-ins. | |manufacturer=Tektronix | ||
It has two [[GR-874 connector]]s. | |model=281 | ||
One connector is intended to be connected to the input of a [[sampling oscilloscope]]. | |class= | ||
|series= | |||
|summary=TDR Pulser | |||
|image=Type 281 1.JPG | |||
|caption=Tektronix 281 TDR Pulser | |||
|introduced=1966 | |||
|discontinued=(?) | |||
|designers= | |||
|manuals= | |||
* [http://w140.com/tek_281.pdf Tektronix 281 Manual (PDF)] | |||
}} | |||
The '''Tektronix 281 TDR Pulser''' is an accessory that plugs into the probe power jack on [[1S1]], [[3S1]], and [[4S1]] plug-ins. | |||
It has two [[GR-874 connector]]s. One connector is intended to be connected to the input of a [[sampling oscilloscope]]. | |||
The other connector attaches to the cable that is being tested. | The other connector attaches to the cable that is being tested. | ||
The 281 periodically produces a pulse that is launched down a cable. | The 281 periodically produces a pulse that is launched down a cable. | ||
The returning reflection is allowed to pass into the oscilloscope | The returning reflection is allowed to pass into the oscilloscope for measurement. | ||
for measurement. | |||
The pulse is specified to be 460 mV, with a rise time of 750 ps or less, with a 5 μs pulse width. | The pulse is specified to be 460 mV, with a rise time of 750 ps or less, with a 5 μs pulse width. | ||
The 281 uses a [[1N3130]] tunnel diode as a multivibrator. | The 281 uses a [[1N3130]] tunnel diode as a multivibrator. | ||
The multivibrator drives a common-base output transistor. | The multivibrator drives a common-base output transistor. | ||
==Pictures== | ==Pictures== | ||
| Line 29: | Line 39: | ||
</gallery> | </gallery> | ||
[[Category:Pulse generators]] | [[Category:Pulse generators]] | ||
[[Category:Time-domain reflectometers]] | [[Category:Time-domain reflectometers]] | ||
[[Category:GR874]] | [[Category:GR874]] | ||
Revision as of 07:16, 19 August 2021
The Tektronix 281 TDR Pulser is an accessory that plugs into the probe power jack on 1S1, 3S1, and 4S1 plug-ins.
It has two GR-874 connectors. One connector is intended to be connected to the input of a sampling oscilloscope. The other connector attaches to the cable that is being tested.
The 281 periodically produces a pulse that is launched down a cable. The returning reflection is allowed to pass into the oscilloscope for measurement. The pulse is specified to be 460 mV, with a rise time of 750 ps or less, with a 5 μs pulse width.
The 281 uses a 1N3130 tunnel diode as a multivibrator. The multivibrator drives a common-base output transistor.
Pictures
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Entry in 1968 catalog
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schematic
