The CMC251 1.3 GHz Multifunction Counter measures the frequency of sine, square and triangle waves from 1 Hz to 1.3 GHz. The CMC251 also provides period, totalize and pulse width measurements. The counter has two input channels. Channel A is a standard 1 MΩ input for frequency measurements up to 100 MHz. Channel B is a 50Ω terminated input for use in high-frequency systems. This counter is of interest to radio amateurs because of its ability to measure high-frequency systems. The temperature-compensated, crystal-controlled time base is stable to ±1 part per million per year. 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.

FEATURES & SPECIFICATIONS:
• Frequency measurements up to 1.3 GHz (1 Hz to 100 MHz (CH 1) 80 MHz to 1.3 GHz (CH 2))
• Period measurements at rates up to 25 MHz
• Period averaging of up to 1000 events
• Pulse measurements up to 0.25 µs
• Event counting
• ±1 ppm Time Base
• Period Average Period Frequency Totalize Self-test
• Display Hold
• Remote Start/Stop

Complete specifications available upon request. "