Owon HDS-N series - Connection of 1 KHz;5 V Square-wave Test Signal; Front Panel and Keys Overview

OWON HDS-N Series Handheld DSO & DMM 5-Input Connections
5.1.2 The connection of 1KHz/5V Square-wave test signal
At the left side of the oscilloscope, it is a port for testing 1 KHz/5V square-wave
signal which is used to adjust the probe, shown as Fig.3
Fig.3. The connection of Square-wave test signal
5.2 Front Panel and Keys Overview
See the following Figure 4:
9