The Frequency Counter is a direct-counting frequency counter with an 8-digit display. The frequency counter has three functions: it determines the frequency of the input signal and displays the frequency in Hz, kHz, or MHz, it determines the period of the input signal and displays the period in s or ms, and it works as an event counter when the counter function is selected. The frequency/period resolution is switch-selectable from 0.1 to 100 Hz (0.1 to 100 ns). As an event counter, each negative-going transition of the input signal adds one to the cumulative count displayed. The input signal may be attenuated by a switch attenuator.
The module is fully protected against short circuits and misconnections. Students use the instruments to make measurements in laboratory experiments performed on AM, FM, and digital communications systems.

Specifications

• Power Requirement: +25 V  425 mA; -25 V 325 mA
• Input Frequency Range: 10 Hz - 10 MHz, 10 MHz - 200 MHz
• Input Period Range: 0.1 s 4 μs (10 Hz-2.5 MHz)
• Count Range: 1 - 99 999 999
• Input Impedance: 1 MΩ
• Sensitivity (Sine Wave RMS Value): 10 Hz - 100 MHz: 25 mV; 100 MHz-200 MHz: 60 mV
• Attenuator: 0, 20 or 40 dB
• Resolution: 0.1, 1, 10, 100 Hz (ns)
• Frequency Display: 8 digits

Physical Characteristics
Dimensions (H x W x D) 112 x 330 x 300 mm (4.4 x 13 x 11.8 in)
Net Weight 3.2 kg (7 lb)