TM  1-1520-240-10            4-1-13 4-1-18.  Controls  and  Function,  Countermeasures Dispenser System (AN/ALE-47  (fig. 4-1-6) CONTROLS/ INDICATOR FUNCTION DCDU: MODE Switch OFF Off mode. Remove power from DCDU. All functions dis- abled except Jettison. STBY Standby mode. Applies pow- er to DCDU to enable BIT, reprogramming, inventory, and jettison. MAN Manual mode. Enables manual dispensing of ex- pendables. SEMI Semi-automatic mode. En- ables manual dispensing of expendables and automatic dispensing when threat has been detected by the ALQ-156 without operator action. AUTO Automatic mode. Enables manual dispensing of ex- pendables and automatic dispensing when threat has been detected by the ALQ-156 without operator action. BYP Bypass mode. Expendables dispensed directly by pilot or copilot using cyclic grip FLARE DISP switches, by- passing the programmed values stored in the Missile Data File. MANUAL Switch 1, 2, 3, 4 Selects one of four manual dispense programs for use when MODE switch is in MAN. PRG Program mode. Enables manual dispensing of ex- pendables. JETTISON switch Forward (on) Dispenses all expendables with safety switch removed if weight off wheels. CONTROLS/ INDICATOR FUNCTION AFT (off) Jettison function deacti- vated. Dispense Annuncia- tor: Displays status READY/NO-GO Input sensor enable/inhibit switches: RWR Not used. MWS Enables/inhibits missile detection system sensor dis- pense input. JMR Not used. Input sensor inhibit indicators: RWR Not used. MWS Indicates missile detection system sensor input has been inhibited. JMR Not used. Payload enable/inhibit switches: 01 Enables/inhibits payload 01. 02 Enables/inhibits payload 02. CH Not used. FL Enables/inhibits payload FL. ENT/BIT switch With MODE switch is in STBY, the ENT/BIT switch allows operator to initiate self-test (BIT). Payload enable/inhibit indicators: Illuminated indicates payload is inhibited. Not illumi- nated indicates payload is enabled. O1 Indicates payload O1 is in- hibited. O2 Indicates payload O2 is in- hibited. CH Not used. FL Indicates payload FL is in- hibited.