Dolby Laboratories DP503 - Manual (Page 37)

SECTION 5
OPERATION
Notes:
See the front and rear view figures located at the end of this section. Flow charts illustrating the user interface
structure are located in Appendix C.
An overview of Dolby Fax principles is described in Section 2A. An ISDN ordering guide (for North America)
can be found in Appendix D.
5.1 Introduction to the User Interface
The DP503 interface provides the user with all the necessary functions for controlling
the unit, and, in Dolby Fax applications, the ISDN unit. It consists of a front panel 16-
character alphanumeric display with accompanying momentary push-button keys.
While the front panel interface does away with the need for computer control, an RS-
232 port is available on the rear panel.
5.1.1 Push-button Key Description
There are 4 directional arrow keys; ENTER and ESCape keys; as well as SHIFT and
DIRectory keys.
The
Å
and
Æ
arrow keys are used to move back and forth among the available
parameters that can be user-configured; a cursor in the form of an underscore on the
first character highlights the selected parameter. In addition, they are used to move to
the next or previous character in character edit screens.
Note: In many screens, the cursor “wraps” around the screen when the
Å
and
Æ
arrow keys are moved past
the left and right extremes.
Hint In the encoder parameters screen (the default screen), the
Å
and
Æ
arrow keys can also act to select a
chosen setting (mimicking the ENTER key) as well as to move to the next parameter.
The
Ç
and
È
arrow keys are used to bring into view the available settings or
characters for each of the parameters.
Note: The cursor “wraps” around the list of available settings or characters when the
Ç
and
È
arrow
keys are moved past the extremes.
The ENTER key is used both to select the chosen setting of the parameter and,
depending on the particular screen, to automatically move the cursor to the next screen
for further configuring.
Note: When changing parameter values, if the ENTER key is not depressed after a desired parameter
appears, the parameter remains unselected; after a brief time-out period, the setting prior to any scrolling
action will be restored.
The ESCape key is used to cancel the current selection or to step upward in the menu
hierarchy.
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