A320飞机维护手册 AMM 指示/记录系统 3(84)

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 < or > If this symbol appears next to an LS key, it indicates that the activating line select key will only cause the MCDU to display a different page (it is the call-up of a page). Its name is displayed beside the symbol.
 *  If this symbol shows beside an LS key, it indicates that the key causes the activation of a function (it is the call-up of a function). The page displayed may also change as a result. If the DMU or FDIMU needs some time to react, during this time the star shall disappear to indicate that the signal was registrated. As long as the star is not shown, the related function can not be activated.
 If an arrow shows beside an LSK, it shows
 that the operator can press the key to set
 data, without activating a function.

,∞  This indicates that the user can enter data here
 (optional). Occasionally this data may be computed
 and entered by the computer as a result of another
 operator action.

∞  This indicates that the data are necessary for the user
 to input in order for the computer to perform the specific
 function.

 ----- This indicates that the data will be displayed by the computer when it has enough information to do so. The user does not normally enter this information. However, under certain circumstances he may be able to alter the data.
 Two vertical arrows (up or down) in columns 23 and 24 of the scratchpad show that vertical slewing is avaiable.
 A horizontal arrow in column 24 of the title line show that horizontal slewing is available from this page. Activating the NEXT PAGE key will slew the page horizontally.
R 1EFF : 106-149, 211-299, 301-399, 401-499, 1 31-36-00Page A15 1 1 Config-2 Aug 01/05 1 1 1CES 1

 (4)
 MCDU Color Coding The color code is as follows:

 ----------------------------------------------------------------| DATA | MCDU COLOUR | |-----------------------------------------|--------------------| | Titles, comments, symbols of slewing | White | | dashes, minor messages, call-up of | | | page, scratchpad data entry | | |-----------------------------------------|--------------------| | Operator modifiable data, selectable | Cyan | | data, brackets call-up of function | | |-----------------------------------------|--------------------| | Operator nonmodifiable data-active | Green | | data | | |-----------------------------------------|--------------------| | - Mandatory data (boxes) mandatory | | | operator action required | Amber | | - Important messages | | |-----------------------------------------|--------------------| | Constraints max altitude | Magenta | |-----------------------------------------|--------------------| | Temporary situation | Yellow | |--------------------------------------------------------------|

 (5)
 MCDU Vertical Slewing Certain pages in the computer contain more data than will fit on a single page (a page longer than the six pairs of lines available on the display). In these cases, data are arranged on a 'drum'. In these instances vertical slewing can be used to scroll the display up or down. Each press of a vertical slew key scrolls the MCDU display by one line pair, or by one block. A line pair is a line adjacent to an LS key and its label line. Holding the vertical slew key down scrolls the MCDU display at a rate of 2 line pairs per second. The arrows will be displayed in columns 23 and 24 of the scratchpad when vertical slewing is available.

 (6)
 General Display of a Page

 -Only the selectable functions or page call-ups are displayed.
 -On a page, some prompts are displayed following a logic dependent on external parameters. In such cases the promt is added or deleted.
 -Prompts that are used on several pages have to be displayed at the same place on the different pages.
 e.g.: RETURN at 6L PRINT at 6R
R 1EFF : 106-149, 211-299, 301-399, 401-499, 1 31-36-00Page A16 1 1 Config-2 Aug 01/05 1 1 1CES 1

 (7) Acknowledgement of User Action Each time the MCDU user activates an LS key or a mode key, he receives an acknowledgement of his action. The new page also displays an acknowledgement of the operator (insertion of a value in a line, message, etc ...). Examples:
 -if the user wants to enter a value into a field, he will have the following messages: 'OUT OF RANGE' if the value is not within the range as expected by the system. 'FORMAT ERROR' if the value does not have the correct format.
 -the message 'NOT ALLOWED' is displayed if an incorrect LS key is
 activated. In case of the call-up of a function, the acknowledgement is made by deletion of the star '*'. This is next to the function name when the call-up is taken into account by the system. If the system is not available a message is displayed (e.g 'Printer Busy').
 (8) MCDU Data Entry Data are entered into the computer through the keyboard. First the data are entered from left to right into the scratchpad by activating the alphanumeric keys on the keyboard (similar to that of a type-writer). Only 22 characters may be entered into the scratchpad. If more than 22 are entered, they will be ignored. The 23rd key press will not be accepted by the computer and the computer will give no response. After entry of the data into the scratchpad, the date are moved from the scratchpad into the correct data field. By activating the adjacent LS key, the scratchpad is cleared.
　
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