GCU 15/25/100 –User guide 5/112 Operation2.1 Powering UpPowering up is achieved by depressing the ‘ENTER’key after which the display willhead up with “CCU15/251100 s/n (Serial No.) / Use SCROLL Keys”.2.2 OptionsOperating either the ‘SCROLL UP’or ‘SCROLL DOWN’keys will activate thechoice of OPTIONS which are as follows:1. Select/Adjust an ON/OFF Channel2. Enter or Display the Time Of Day3. Enter the Day4. Adjust SLEEP Time/Days ?5. Power Down unit ?6. Set Up COPY SYNC Ops. ?7. Set Up CLONE/LEARN Facility ?8. Set Up MIMIC/MASTER Facility ?9. Check BATTERY Voltage ?10. Set Up EXTERNAL SYNC Ops. ?11. START Unit Switching Ops.12. STOP Unit Switching Ops.13. Cancel all SYNC Set Up Jobs14. Enable/Disable DISPLAY AUTO-POWER OFFAll options are not necessarily available at any one time because of theinterdependency existing between them. (E.g. it is neither necessary nor possible to“STOP Unit Switching Ops.”if they have not yet been started). It is preferable toleave the unit displaying an option whilst operating and when not under user controland essential to do so if the user wishes to take advantage of the power conservationChapter2