It is the power switch. Pushing the upper part turns on the power. When the power is supplied by either of the AC adaptor or the battery and it is ready to operate, the LED on the button turns on.

 It is the button to start measurement/recording. Pushing the button starts measurement/recording, and the LED on the button turns on to show the start of operation. Please note that it cannot start unless the in-vivo calibration was done by CAL button, and the CAL LED turns on. If the START button is pushed again during the measurement/recording (LED lighting-up), it restarts another measurement/recording from the point when pushed again after deleting the recorded data till then. It is useful when a recording is started in spite of insufficient preparation at the time of beginning a measurement though it often happens.

 It is the button to stop measurement/recording. Pushing the button stops measurement/recording. The Green LED in the button lights to indicate the confirmation of the stop.
Multiple tasks can be measured and recorded by repeating START/STOP. Recording time of the record memory in the Main unit is about ten hours. Even if the START button is pushed, it doesn't begin to record when the memory is full. When the memory became full, please send off the data to the PC once for processing the memory to be empty.

The button is pushed when an event trigger is input manually from the front face of the Main unit. It reacts only when it is measuring. In addition, the manual event trigger input is prepared also on the back face of the Main unit.

It is the button for the in-vivo calibration. In case of AUTO mode described in the separate Software edition, please push the button once before beginning a measurement after installing the head module to a live body. The LED becomes in lighting state when the calibration ended, and it becomes possible to measure. It always lights in case of MANUAL mode, and it can start a recording at any time without performing the calibration work.

When the capacity of the battery (a block of four AA batteries) for the main part of Main unit fell to less than the rated value, it lights (red). In case of battery operation, please exchange the battery for charged one in good time when the LED lighted. Continuous operating time of the battery is limited in one hour. In addition, it does not guarantee one hour in operation of this equipment with batteries other than the ENELOOP of SANYO. Please use the ENELOOP without fail.

Cable L for Spectratech OEG-16-01 Head module is connected.

Cable R for Spectratech OEG-16-01 Head module is connected.

It is used for the start input of measurement/recording or the event trigger input from external device via Spectratech OEG-16-04 BNC cable for external signal input.

 It is used for the event trigger input from external device via Spectratech OEG-16-04 BNC cable for external signal input.

Cable from Spectratech OEG-16-05 Box for manual event trigger input is connected. The manual event trigger can be input from this Box besides the EVENT switch on the front face of the Main unit. The green LED on the Box lights when an event trigger was accepted.

It is connected to PC with Spectratech OEG-16-06 USB cable for PC connection when various commands are given from the PC to Spectratech OEG-16 Main unit, or the PC receives the measurement data from the Main unit.

 Cable from the attached AC 110V adaptor is connected. It is used when operating by connecting with PC, or the battery operation is not required though it is an independent operation by Main unit.

It is earth terminal. Please surely connect it to ground in the environment where it can ground.

For main part of Main unit
Please equip the battery set for a battery-powered operation of Spectratech OEG-16 Main unit. It consists of four AA batteries. It is capable of continuous operation for about 1 hour. When the capacity becomes insufficient, BATT LED on the front face of the Main unit lights (red) to warn about it. When the LED turned on, please exchange the battery set for a charged one in good time. When the LED turned on during measurement/recording, the recording is automatically ended, the data is saved, and it is put into halt state. In addition, it does not guarantee one hour in operation of this equipment with batteries other than the ENELOOP of SANYO. Please use the ENELOOP without fail.

For photo isolation part
The battery set is used when EXT-EVENT-IN 1 or EXT-EVENT-IN 2 of Spectratech OEG-16 Main unit is connected to external device. It consists of two AA batteries. Since the use of this battery makes a complete optical isolation between the external device and the Main unit, it can be connected to the external devices safely. It can be used continuously for about 6 months. When EXT-EVENT-IN1 or 2 is not used, this battery need not be equipped.