Close
You have no items in your shopping cart.
Search

Tektronix CMC251 Frequency Counter

Manufacturer part number: CMC251
1Hz - 1.3 GHz
PURCHASE
Available QTY Price
New:   0
+ -
$0.00
Used:   1
+ -
$0.00 Configurations
X

Available Configurations

FREQUENCY COUNTER 1HZ - 1.3 GHZ
30005274
$0

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 50 Ω 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.

Features:

  • 1 Hz to 100 MHz (CH 1), 80 MHz to 1.3 GHz (CH 2)
  • ±1 ppm Time Base
  • Period Average, Period, Frequency, Totalize Self-test
  • Display Hold
  • Remote Start/Stop
  • One Year Warranty
  • Channel A
    • Frequency Range - 1 Hz to 100 MHz.
    • Sensitivity - 20 mVRMS, 1 Hz to 30 MHz; 50 mVRMS, 30 MHz to 100 MHz.
    • Attenuation - 3 V to 42 V (HI); 50 mV to 5 V (LO).
    • Max. Input Voltage - 1 Hz to 5 MHz: 42 V pk. 5 MHz to 100 MHz: 4.9 V pk.
    • Low Pass Filter - -3 dB at 100 kHz.
    • Impedance - 1.0 MΩ, paralleled by 40 pF.
  • Channel B
    • Frequency Range - 80 MHz to 1.3 GHz.
    • Sensitivity - 5 mVRMS, 80 MHz to 600 MHz; 15 mVRMS, 600 MHz to 900 MHz; 35 mVRMS, 900 MHz to 1.3 GHz.
    • Impedance - 50 Ω.
    • Max. Input Voltage - 1 VRMS.
  • Period
    • Range - Direct: 0.4 µs to 1.0 s. Prescale: 0.04 µs to 1.0 s.
    • Resolution - Direct: 100 ps to 100 ns. Prescale: 10 ps to 10 ns.
    • Min. Pulse Width - Direct: 0.2 µs. Prescale: 20 ns.
    • Frequency Range - Direct: 1 Hz to 2.5 MHz. Prescale: 1 Hz to 25 MHz.
    • Events Averaged (N) - 1, 10, 100, 1000, 10,000 cycles.
    • Totalize Range - 0 to 99,999,999.
  • Pulse Width
    • Range - 0.25 µs to 0.5 s.
    • Period Range - 100 ps to 100 ns.
    • Events Averaged (N) - 1, 10, 100, or 1000 cycles.
  • Time Base Stability
    • Temperature - <1 ppm from 0 °C to 40 °C.
    • 10% Line Voltage Change - <0.4 ppm.
  • Accuracy
    • Frequency - ±(time base error + 1 count).
    • Period - ±(time base error + 1 count + trigger error).
    • Pulse Width - ±(time base error + 1 count + trigger error + 10 ns).
  • Plus
    • Selectable Slope - No.
    • Ratio CH A: CH B - No.
    • Display Hold - Yes.
    • Remote Start/Stop - Yes.
    • Time Interval CH A: CH B - No.
    • Safety - UL1244, CSA231, EN61010-1.
    • EMC - Meets Directive 89/336/EEC.
  • Training
  • Manufacturing
  • Production Test
  • Field Repair
  • Bench Calibration and Repair
  • Product Design
  • Laboratory and Research
  • Education
Description

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 50 Ω 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.

Features:

  • 1 Hz to 100 MHz (CH 1), 80 MHz to 1.3 GHz (CH 2)
  • ±1 ppm Time Base
  • Period Average, Period, Frequency, Totalize Self-test
  • Display Hold
  • Remote Start/Stop
  • One Year Warranty
Product tags