Probe power

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Many Tektronix instruments provide power for active probes. There have been several distinct versions of probe power.

The first Tektronix instrument to provide probe power was the 513. It provides +225VDC, +6.3VDC, and a variable supply producing +15VDC to +150VDC.

The 128 provides +120VDC and +6.3VDC.

The 3S1 provides +100VDC and -12.2VDC.

7000-series scopes provide +15VDC, +5VDC, and -15VDC.