8163A/B, 8164A/B, 8166A/B User’s Guide 317Installation and Maintenance 11Figure 193 8164A/B Lightwave Measurement System Power KeyCAUTION If you need to turn off the power, unplug the instrument at the mains orremove the power cable connector from the appliance coupler at the rearof the instrument. For this reason, the power cable connection should beeasily accessible - allowing you to turn off the power quickly. If theinstrument is in a cabinet, it must be disconnected from the line powerby the system’s line power switch.CAUTION Please note that the power key on the front panel of the 8164A/BLightwave Measurement System does not stop the flow of power to theinstrument. The power key allows you to switch between stand-by modeand power-on mode.When the green power-on LED is lit, you can use the instrument. Whenthe orange stand-by mode LED is lit, the Lightwave Measurement Systemis in stand-by mode. Do not remove the instrument covers - the powersupply is still operating in stand-by mode.Power-on LED (green)Stand-by mode LED (orange)Power KeyCAUTION If you need to turn off the power, unplug the instrument at the mains orremove the power cable connector from the appliance coupler at the rearof the instrument. For this reason, the power cable connection should beeasily accessible - allowing you to turn off the power quickly. If theinstrument is in a cabinet, it must be disconnected from the line powerby the system’s line power switch.
