Agilent Technologies U1251A Frequency Specifications, Duty Cycle and Pulse Width Specifications

Specifications 8

Frequency Specifications

Table 7-10Frequency specifications

		Accuracy
Range	Resolution	± (% of reading + No. of	Min. Input Frequency
		Least Significant Digit)

99.999 Hz	0.001 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

0.02% + 3

1 Hz

< 600 kHz

Notes for frequency specifications:

1The multimeter will automatically select the most appropriate range when making frequency measurements.

Duty Cycle and Pulse Width Specifications

Table 7-11Duty cycle and pulse width specifications

Function	Mode	Range	Resolution	Accuracy (at full scale)
Duty cycle	DC Coupling	0.01% to 99.99%	-	0.3% per kHz + 0.3%
	AC Coupling	5% to 95%	-	0.3% per kHz + 0.3%

Notes for duty cycle specifications:

1The accuracy for duty cycle and pulse width is based on a 5 V square wave input into the DC 5 V range.

2For AC coupling, the duty cycle range can be measured for signal frequency > 20 Hz.

-	500 ms	0.01 ms	0.2% + 3
Pulse width
-	2000 ms	0.1 ms	0.2% + 3

Notes for pulse width specifications:

1The accuracy for duty cycle and pulse width is based on a 5 V square wave input into the DC 5 V range.

2Positive 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.

Agilent U1251A/U1252A User’s and Service Guide 157