A1560 SONIC - OEM ULTRASONIC PULSER/RECEIVER FRONT-END UNITUser manual185 To power the instrument on, press the POWER button (Fig.1 Pos.1) for a half-second. The state indicator inside the buttonlights up immediately.To power the instrument off, press the POWER button for a half-second again. Due to the deinitialization process, it takesabout three seconds before the state indicator goes off.In normal mode, the indicator has the following indication modes:5.1 POWER BUTTON WITH BUILT-IN STATE INDICATOR5.2 CONNECTOR FOR A SINGLE-CRYSTAL TRANSDUCEROR THE RECEIVING ELEMENT OF A DOUBLE-CRYSTALTRANSDUCERTABLE 5 POWER LED INDICATION IN NORMAL MODELED Indication Device stateConstantly On A1560 is on.Constantly Off A1560 is off.Blinking A1560 is on, battery is discharged.In device firmware upgrade (DFU) mode, the meaning of the indication is different. Please refer to the A1560 AdvancedConfiguration document for further information.The receiving element of a double-crystal transducer or a single-crystal transducer equipped with a LEMO 00 series plugcan be connected to the IN socket (Fig.1 Pos.2) of the A1560. Connect the transducer cable to the A1560 by inserting the plugof the cable into the socket. If you need to disconnect the cable, carefully grasp the plug by the knurled metal outer shell andpull it straight backwards.