Agilent Technologies U1270 Series Manual de usuario descargar pdf (Pagina 13)

Frequency specifications

[1][2]

Range Resolution Accuracy 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 %

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

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.

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.

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Agilent Technologies U1270 Series Manual de usuario Pagina 13