TM  1-1520-240-10            3-2-19 CONTROLS/ INDICATOR FUNCTION INOP line-select switch dis- plays INOP MODES so an operator can see if limited ca- pability exists. The Continu- ous Bit (C-BIT) is automati- cally performed during sys- tem operation without any operator intervention. Critical system functions are monito- red. Any failures cause a NO- GO advisory, accomplished by the portion of system which failed, to appear on line 5 of the display. C-Bit fail- ures are stored in nonvolatile memory. Store RTN line-select key, used to terminate edit mode, auto- matically stores any change(s) made. DataFill Contains preset frequencies, scan lists, addresses, data messages and ALE and/or ECCM parameters. With sys- tem in STBY, press the FILL line-select switch. Use VAL- UE switches to select DATA in the fill TYPE: field (line 2). Connect data transfer devise (DTD) of DATA connector on radio set control front panel and initiate fill from the DTD. LOADING is displayed dur- ing datafill. LOAD COM- PLETE is displayed for suc- cessful fill, LOAD FAIL dis- played if fill cannot be com- pleted. (NOTE: using an AN/ CYZ-10 DTD, the radio set control displays DTD DE- TECTED when DTD is de- tected). A copy of loaded da- tafill can be sent to DTD by pressing COPY line-select switch. COPYING is dis- played during operation, COPY COMPLETE displayed if successful, COPY FAIL if copy cannot be completed. Press RTN line-select switch to return to STBY screen when datafill is complete. Disconnect the DTD. CONTROLS/ INDICATOR FUNCTION Key Fill Loads secure keys. From STBY screen, press FILL line-select switch. Use VAL- UE switched to select KEY in fill TYPE: field. Connect DTD to KEY connector on radio set cotnrol panel. Use VAL- UE right arrow switch to se- lect key number (1 through 6) to be loaded. Initiate keyfill from DTD. LOADING is dis- played during keyfill, LOAD COMPLETE if successful. LOAD FAIL may cause inter- ference to other stations. De- fault is ON. LBT: (listed be- fore talk) - This field is used for manual, preset, or con- ventional (non-ALE) ECCM operation and turns LBT ON or OFF. When OFF, transmis- sion is accomplished without regard to traffic and may cause interference to other stations. Default is OFF. ANT: (antenna) - Useful if system uses both receive- only and transmit/ receive an- tennas. When T/R is selected, the system transmits and re- ceives on the same antenna. When RCV is selected the system transmits on one and receives the other antenna. Default is T/R LINK PROT: (link protection) - This field turns ALE link protection ON or OFF. De- fault is ON (OFF if no link protection datafill). Press RTN line-select switch when setup edit is complete to en- ter all data and return to STBY screen.