BRL Test, Inc.

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CNT-85 - Pendulum Instruments Frequency Counters


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  • Model: CNT-85
  • Manufactured by: Pendulum Instruments
  • Max. Freq.: 8.0GHz
  • Freq. Resolution [Digits]: 10
  • Measurements: Frequency, Period, Count totalization, Time interval, Duty factor, Pulse width, Freq. range, Burst freq.
  • Extra Specifications: High-Performance Frequency Counter

With the CNT-85 and CNT-85R frequency counters and calibrators, Pendulum offers the ultimate tools for stationary as well as portable calibration of frequency, from DC to over 8 GHz. These counters are designed for on-site calibration of the master clock in GSM base stations, offering a TUR of >50 over a 10 year period. They also fit on the R&D bench, in the calibration lab or in manufacturing test systems where fast and accurate frequency measurements are needed. Choose between the economy model CNT-85 and the ultimate CNT-85R including a built-in Rubidium time-base reference.

The CNT-85 frequency counter from Pendulum brings cal lab accuracy to field measurements. With the (optional) ultra-stable oven timebase and a high 10 digits resolution in just one second, it delivers high-accuracy measurements instantly. An overflow mode displays also the 11th and 12th digits, when needed. The CNT-85 is easy to use, compact and has a unique, smart automatic input triggering for any type of signal. A very short warm-up time of the oven oscillator, gives you ppb-performance after only 10 minutes.

  • High resolution: 10 digits in 1s 
  • Low uncertainty: 0.0001 ppm (Rb) 
  • Short warm-up time: 10 min. to 4x10-10 
  • Wide frequency range to 8 GHz 
  • Smartest input trigger system
  • Measures any type of input signal, incl. bursts, AM, FM and noisy signals 
  • Displays also input signal strength 
  • Excellent EMC-immunity 
  • Easy to use 
  • Ideal for on-site frequency calibration of the master clock in GSM base stations
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