168 Agilent U1251B/U1252B User’s and Service Guide
7 Specifications
Notes for square wave output specifications:
1 Output impedance: 3.5 kW maximum.
2 The positive or negative pulse width must be greater than 50 µs for adjusting the duty cycle or the pulse width under
different frequencies. Otherwise the accuracy and the range will be different from the definition.
3 For signal frequencies greater than 1 kHz, add 0.1% per kHz to the accuracy.
4 The accuracy for duty cycle and pulse width is based on a 5 V square wave input without dividing signal.
5 Duty cycle can be set for 256 steps and each step is 0.390625% per kHz.
6 The pulse width can be set for 256 steps and each step is 1/(256 x Frequency).
Table 7-17 Square wave output specifications