Specifications 8
Agilent U1251A/U1252A User’s and Service Guide 165
U1251A & U1252A Frequency Sensitivity During Current Measurement
Duty Cycle
(1)
Pulse Width
(1)
[1] Positive or negative pulse width must be greater than 10 μs and the range of
duty cycle should be considered. The range of pulse width is determined by the
frequency of the signal.
U1252A Frequency Counter Specifications
Divide 1 (secondary display “-1-”)
Input Range
Minimum Sensitivity (R.M.S. Sine-Wave)
20 Hz – 20 kHz
500.00 μA100 μA
5000.0 μA250 μA
50.000 mA 10 mA
440.00 mA 25 mA
5.0000 A 1 A
10.000 A 2.5 A
MODE RANGE ACCURACY AT FULL SCALE
DC Coupling 0.01 % – 99.99 % 0.3 % per kHz + 0.3 %
MODE RANGE ACCURACY AT FULL SCALE
500 ms 0.01 ms 0.2 % + 3
2000 ms 0.1 ms 0.2 % + 3
Range Resolution Accuracy
± (% of reading + No. of
Least Significant Digit)
Sensitivity Min. Input Frequency
99.999 Hz 0.001 Hz 0.02%+3
100 mV R.M.S.
0.5 Hz
999.99 Hz 0.01 Hz
0.002%+5,
<2 MHz
9.9999 kHz 0.0001 kHz
99.999 kHz 0.001 kHz
999.99 kHz 0.01 kHz 200 mV R.M.S.
9.9999 MHz 0.0001 MHz
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