Specifications
2645A Specifications
A
A-25
2645A Frequency Measurement Specifications A-28.
Tables A-37 to A-38 provide 2645A specifications for the frequency measurement
function.
Table A-37. 2645A Frequency Accuracy Specifications
Frequency Measurement Accuracy, 1 Year, -10ºC to 60ºC
Range
Resolution Accuracy + (% input + Hz)
Slow Fast Slow Fast
15 Hz to 900 Hz 0.01 Hz 0.1 Hz 0.05%+0.02 Hz 0.05%+0.2 Hz
900 Hz to 9 kHz 0.1 Hz 1 Hz 0.05%+0.1 Hz 0.05%+1 Hz
9 kHz to 90 kHz 1 Hz 10 Hz 0.05%+1 Hz 0.05%+10 Hz
90 kHz to 900 kHz 10 Hz 100 Hz 0.05%+10 Hz 0.05%+100 Hz
1 MHz 100 Hz 1 kHz 0.05%+100 Hz 0.05%+1 kHz
Table A-38. 2645A Frequency Sensitivity Specifications
Frequency Measurement Sensitivity (Sine Wave)
Frequency Range Minimum Signal Maximum Signal
15 Hz to 70 kHz 100 mV rms 30V rms
70 kHz to 100 kHz 100 mV rms 20V rms
100 kHz to 200 kHz 150 mV rms 10V rms
200 kHz to 300 kHz 150 mV rms 7V rms
300 kHz to 1 MHz Linearly increasing from 150V
ms at 300 kHz to 2V rms at 1
MHz
Linearly decreasing from 7V
rms at 300 kHz to 2V rms at 1
MHz
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