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The 1S2 is a sampling/TDR plug-in for 500-series scopes. | The 1S2 is a sampling/TDR plug-in for [[500-series scopes]]. | ||
as they pass back through the sampler, and they are reabsorbed by the 50-ohm impedance of the pulser. Waveform output can be to the CRT of the mainframe and/or to a plotter or low-speed data acquisition device via banana connectors on the front of the 1S2. The 1S2 was [[introduced in 1967]]. | Like the [[1S1]], it is a complete sampling subsystem and uses the mainframe | ||
merely as a power supply and low-speed display. | |||
Unlike the 1S1, it contains pulsers that allows it to perform time-domain reflectometry (TDR) measurements. | |||
The 1S2 has two 50-ohm pulsers, one of which is active at a time. One puts out a 250mV pulse with 50ps risetime. | |||
The other puts out a slower 1 volt pulse. The sampling bridge is a feed-through type. | |||
For TDR measurements, the signal from one of the internal pulsers is fed through the sampler, | |||
and out to the the transmission line being tested. | |||
Returning pulses are detected as they pass back through the sampler, | |||
and they are reabsorbed by the 50-ohm impedance of the pulser. | |||
Waveform output can be to the CRT of the mainframe and/or to a plotter | |||
or low-speed data acquisition device via banana connectors on the front of the 1S2. | |||
The 1S2 was [[introduced in 1967]]. | |||
* [http://w140.com/kurt/tek_1s2_sn1990-up.pdf 1S2 manual] | * [http://w140.com/kurt/tek_1s2_sn1990-up.pdf 1S2 manual] |