Datasheet

15
Electrical Specifications
Frequency specifications
1, 2
Range Resolution
Accuracy ± (% of reading +
counts of least significant digit)
Minimum input frequency
99.999 Hz 0.001 Hz 0.02 + 5
0.5 Hz
999.99 Hz 0.01 Hz 0.005 + 5
9.9999 kHz 0.1 Hz 0.005 + 5
99.999 kHz 1 Hz 0.005 + 5
999.99 kHz 0.01 kHz 0.005 + 5
> 1 MHz 0.1 kHz 0.005 + 5 @ < 1 MHz
1. Overload protection: 1000 V; input signal is < 20,000,000 V × Hz (product of voltage and frequency).
2. The frequency measurement is susceptible to error when measuring low-voltage, low-frequency signals. Shielding inputs from external noise pickup is
critical for minimizing measurement errors. Turning on the low pass filter may help you to filter out the noise and achieve a stable reading.
Duty Cycle
3
Mode Range Accuracy at full scale
DC coupling 99.99% 0.3 % per kHz + 0.3 %
AC coupling 99.99% 0.3 % per kHz + 0.3 %
3. Notes for duty cycle specifications:
• The accuracy for duty cycle and pulse width measurements is based on a 3 V square wave input to the DC 3 V range. For AC couplings, the duty
cycle range can be measured within the range of 10% to 90% for signal frequencies > 20 Hz.
• The range of the duty cycle is determined by the frequency of the signal: {10 μs × frequency × 100%} to {[1 – (10 μs × frequency)] × 100%}.
• The pulse width (positive or negative) must be > 10 μs. The range of the pulse width is determined by the frequency of the signal.
Pulse Width
4
Range Resolution Accuracy at full scale
999.99 ms 0.01 ms (duty cycle accuracy/frequency) + 0.01 ms
2000.0 ms 0.1 ms (duty cycle accuracy/frequency) + 0.1 ms
4. Notes for pulse width specifications:
• The accuracy for duty cycle and pulse width measurements is based on a 3 V square wave input to the DC 3 V range.
• The pulse width (positive or negative) must be > 10 μs. The range of the pulse width is determined by the frequency of the signal.