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The Tektronix CMC251 Frequency Counter can make the following frequency-related measurements: frequency measurements up to 1.3 GHz, period measurements at rates up to 25 MHz, period averaging of up to 1000 events, pulse measurements up to 0.25 microseconds, and event counting. The 10 MHz internal time base (using a highly stabilized crystal oscillator) provides a single-shot resolution of 100 ns. Measurement results are displayed using an eight digit display, automatically placing the decimal appropriately. The CMC251 Frequency Counter has a locking, multiposition handle that folds under the instrument. The instrument comes with a 115 V power cord and an installed fuse for 115 V operation.
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