Quick start EN Figure 4.5 CH3 Interface 4. 10 MHz Reference In/Out (10MHz In/Out) BNC connector with 50Ω nominal output impedance and 5KΩ nominal input impedance. The function of this connector is determined by the type of clock used by the generator. HDG3000C can use internal or external clock (refer to the introduction in " Clock Source "). ⚫ When internal clock source is used, the connector (used as 10MHz Out) can output 10MHz clock signal generated by the internal crystal oscillator of the generator. ⚫ When external clock source is used, the connector (used as 10MHz In) accepts a 10MHz external clock signal.
⚫ This connector is usually used to synchronize multiple instruments (refer to the introduction in " Clock Source "). 5. Counter (0~3.3V, external signal input) BNC connector with 500Ω nominal input impedance. It is used to accept an external signal to be measured by the counter. 6. USB DEVICE Interface 7. Safety Lock Hole 8. AC Power Socket 4.4.3 Main interface The user interface is shown in the following figure. Copyright © Qingdao Hantek Electronics Co., LTD HDG3000C User manual 15