Agilent Technologies U1251A manual Frequency Counter Specifications for U1252A

8 Specifications

Frequency Counter Specifications for U1252A

Table 7-15Frequency counter (divide by 1) specifications

		Accuracy
Range	Resolution	± (% of reading + No.	Sensitivity	Min. Input Frequency
		of Least Significant
		Digit)
99.999 Hz	0.001 Hz	0.02% + 3 [1]
999.99 Hz	0.01 Hz		100 mV R.M.S.
9.9999 kHz	0.0001 kHz			0.5 Hz
99.999 kHz	0.001 kHz	0.002% + 5
999.99 kHz	0.01 kHz		200 mV R.M.S.
		< 985 kHz
9.9999 MHz	0.0001 MHz

Table 7-16Frequency counter (divide by 100 [4]) specifications

		Accuracy
Range	Resolution	± (% of reading + No.	Sensitivity	Min. Input Frequency
		of Least Significant
		Digit)
9.9999 MHz	0.0001 MHz	0.002 % + 5,	400 mV R.M.S.	1 MHz
99.99 MHz	0.001 MHz	< 20 MHz	600 mV R.M.S.

Notes for frequency counter specifications:

1All frequency counters are susceptible to error when measuring low-voltage, low-frequency signals. Shielding inputs from picking up external noise is critical for minimizing measurement errors. For non-square wave signals, an additional 5 counts need to be added.

2The maximum measurement level is < 30 Vpp.

3The minimum measurement frequency of low frequency is set by power-on option to speed up the measurement rate.

4Shown on the secondary display

160 Agilent U1251A/U1252A User’s and Service Guide