Technical data

148 Agilent U1251B/U1252B User’s and Service Guide
7 Specifications
U1251B & U1252B Frequency Specifications
U1251B Frequency Sensitivity During Voltage Measurement
U1252B Frequency Sensitivity During Voltage Measurement
[1] The input signal is lower than the product of 20,000,000 V-Hz.
Range Resolution Accuracy
± (% of reading + No. of
Least Significant Digit)
Min. Input Frequency
99.999 Hz 0.001 Hz
0.02%+3
<600 kHz
1 Hz
999.99 Hz 0.01 Hz
9.9999 kHz 0.0001 kHz
99.999 kHz 0.001 kHz
999.99 kHz 0.01 kHz
Input Range
Minimum Sensitivity
(R.M.S. Sine-Wave)
Trigger Level For DC Coupling
(Maximum input for specified
accuracy = 10 x Range or
1000 V)
20 Hz – 100 kHz
>100 kHz – 200 kHz
< 100 kHz >100 kHz – 200 kHz
50.000 mV 10 mV 15 mV 10 mV 15 mV
500.00 mV 25 mV 35 mV 60 mV 70 mV
1000.0 mV 40 mV 50 mV 100 mV 150 mV
5.0000 V 0.25 V 0.5 V 0.5 V / 1.25 V (< 100 Hz) 0.6 V
50.000 V 2.5 V 5 V 5 V 6 V
500.00 V 25 V N/A 50 V N/A
1000.0 V 50 V N/A 300 V N/A
Input Range
Minimum Sensitivity
(R.M.S. Sine-Wave)
Trigger Level For DC Coupling
(Maximum input for specified
accuracy = 10 x Range or
1000 V)
20 Hz – 200 kHz
>200 kHz – 500 kHz
< 100 kHz >100 kHz – 500 kHz
50.000 mV 10 mV 25 mV 10 mV 25 mV
500.00 mV 70 mV 150 mV 70 mV 150 mV
1000.0 mV 120 mV 300 mV 120 mV 300 mV
5.0000 V 0.3 V 1.2 V 0.6 V 1.5 V
50.000 V 3 V 5 V 6 V 15 V
500.00 V 30 V < 100 kHz N/A 60 V N/A
1000.0 V 50 V < 100 kHz N/A 120 V N/A
[1]