Agilent Technologies U1253B Manual de usuario descargar pdf (Pagina 10)

Display Rate

Function Times/Second

ACV 7

ACV + dB 7

DCV 7

AC + DC V 2

Ω/nS 14

Diode 14

Capacitance 4 (< 100 µF)

DCI 7

ACI 7

AC + DC I 2

Temperature 6

Frequency 1 (>10 Hz)

Duty cycle/Pulse width 0.5 (>10 Hz)

Decibel (Db) Calculation

dB Base Reference Default Reference

1 mΩ (dBm) 1-9999 Ω 50 Ω

1 V (dBV) 1 V 1 V

Manual and Interval Data Logging

Logging

Type

Maximum Data Points

[5]

U1251B U1252B U1253B

MANUAL 100 100 100

INTERVAL 200 200 1000

[1] All frequency counters are susceptible to errors. Shielding inputs from external noise pickup is critical to minimize measurement errors. For

non-square wave signals, add 5 counts.

[2] Output impedance: 3.5 kΩ maximum.

[3] The positive or negative pulse width must be greater than 50 µs for adjustment of the duty cycle or pulse width under different frequencies.

Otherwise, the accuracy and range will be different from the speciﬁcations deﬁned.

[4] For signal frequencies greater than 1 kHz, an addition of 0.1% per kHz is added to the accuracy.

[5] For data logging to PC, maximum number of data points is dependent on available hard disk space.

[6] For the U1253B model.

Input Impedance

Table A

Function Range U1251B U1252B/U1253B

DC Voltage 50 mV to 1000 mV 10 MΩ 10 MΩ

5 V to 1000 V 10 MΩ (nominal), with 10 MΩ in

parallel at dual display

10 MΩ (nominal), with 10 MΩ in

parallel at dual display

AC Voltage 50 mV to 1000 mV 10 MΩ in parallel with < 100 pF 10 MΩ in parallel with < 100 pF

5 V to 1000 V

AC + DC Voltage 50 mV to 1000 mV N/A 10 MΩ

5 V to 1000 V 10 MΩ (nominal) in parallel with

10 MΩ, < 100 pF

1 2 ... 5 6 7 8 9 10 11 12 13 14 15

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Agilent Technologies U1253B Manual de usuario Pagina 10

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