281

From TekWiki
Jump to navigation Jump to search
Tektronix 281
TDR Pulser
Tektronix 281 TDR Pulser

Produced from 1966 to (?)

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

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