20 Technical descriptionBALTECH VP-3470Operation manual2. Input «02 channel»3. Output for stroboscope and tachometerFigure 3. Lower panel of the display unit1. Plug for a network adapter2. USB inputThe display unit has a robust aluminum housing (IP 65) with a film keyboard onthe front panel. Data interchange between the display unit and PC is conducted viathe USB interface. The function keys and alphanumeric keyboard are located on thefront panel (Figure 4).To enter a letter press the corresponding button several times till the required letteris displayed. Press long (more than 2 seconds) to move to the next symbol.The button 0 is used for lacuna and full point.