U1281A Datasheet, PDF (14/18 Pages) Keysight Technologies – U1280 Series Handheld Digital Multimeters

14 | Keysight | U1280 Series Handheld Digital Multimeters - Data Sheet
Duty cycle and pulse width for U1281A / U1282A^1,2,3
Duty cycle mode
DC coupling
AC coupling
Pulse width range
99.999 ms
999.99 ms
2000.0 ms
Range
99.999%
99.999%
Resolution
0.001 ms
0.01 ms
0.1 ms
Accuracy at full scale
0.3 % per kHz + 0.3 %
0.3 % per kHz + 0.3 %
Accuracy
Duty cycle accuracy / frequency + 1
Duty cycle accuracy / frequency + 1
Duty cycle accuracy / frequency + 1
Notes
1. The accuracy for duty cycle and pulse width is based a square wave of full scale input to the 6 V
range. For AC coupling, the duty cycle range can be measured within 5 % to 95 % for signal
frequency more than 15 Hz.
2. The pulse width (positive or negative) must be more than 10 µs. The range of the pulse width is
determined by the frequency of the signal.
3. The range of the duty cycle is determined by the frequency of the signal: {10 µs x frequency x 100 %}
to {[1 –(10 µs x frequency)] x 100 %}
Peak hold for U1281A / U1282A
Signal width
Single event > 1 ms
Repetitive > 250 µs
Accuracy for DC mV / voltage / current
2 % + 400 for all ranges
2 % + 1000 for all ranges
dB specification for U1281A / U1282A
dB base
1 mW (dBm)
1 V (dBV)
Reference
1 to 9999 Ω
1V
Default reference
50 Ω
1V
Notes
1. The reading of dBm is indicated in decibels of power above or below 1 mW, or decibels of voltage
above or below 1 V. The formula is calculated according to the voltage measurement and specified
reference impedance. Its accuracy is depended on the accuracy of the voltage measurement.
2. Auto-ranging mode is used
3. The bandwidth is according to voltage measurement.