Practical-instrument-electronics 850 Manual do Utilizador descarregar pdf (Página 42)

Page 40

Preliminary

Frequency Source

Ranges 1 to 2000 CPM, 0.01 to 999.99 Hz, 0.1

to 9999.9 Hz, 0.001 to 20.000 kHz

Accuracy

± (0.02 % of Reading + 0.01% Full Scale)

Output Waveform

Square Wave, Zero Crossing -1.0 to +5 V

peak-to-peak ±10%

Risetime (10 to 90% of

amplitude)

< 10 microseconds

Output Impedance < 1 Ohm

Source Current > 1 mA rms at 20 kHz

Short Circuit Duration Infinite

Optical Coupling Green LED (HZ SYNC) flashes at

output frequency

Frequency Read

Ranges & Accuracy Same as Frequency Source

Accuracy

± (0.02 % of Reading + 0.01% Full Scale)

Trigger Level 1 V rms, dc coupled

Input Impedance > 1 Meg Ohm + 60 pF

Specifications

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Practical-instrument-electronics 850 Manual do Utilizador Página 42