Check the listing for details. Tektronix Type S-4 Sampling Head. Condition: Used. Listed at 248.00 USD. The S-4 can be plugged into the 7S11 or 7S12 Sampling units, or attached by a sampling head extender for remote use. Variable DC Offset allows signals between +1 V and -1 V limits to be displayed at 2 mV/div.
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