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8
SYSTEM KEYBOARDS - LTC 8550,
LTC 8551, LTC 8552, LTC 8553 SERIES
Lens Control
Rocker Switches
Function Keys and
Switcher Control Key
The various system keyboard displays and functions for the
LTC 8550/00, LTC 8551/00, LTC 8552/00, and LTC 8553/00
are described herein. Refer to the applicable keyboard diagrams as
needed. The LTC 8550/01, LTC 8551/01, LTC 8552/01, and
LTC 8553/01 utilize ICON characters in lieu of English text.
8.1
Keyboard Displays
8.1.1 Monitor Display
The monitor display is a three-digit seven-segment display that
serves two purposes. One purpose is to display the number of the
monitor that the keyboard is currently controlling. This monitor's
camera number appears in the camera display, and the pan and
tilt keys control camera movement if applicable. The second
purpose is to provide a prompt to a user to log-on to the system if
the log-on feature was enabled by the system installer. Once the
user has logged on, the display reverts to the monitor number.
8.1.2 Camera Display
The camera display is a four-digit seven-segment display. It shows
the number of the camera being viewed on the monitor that the
keyboard is controlling. However, there are three modes for this
display. The camera mode is the default, but when the user pushes
one of the numeric data keys, this display shows the numeric
keystrokes as they are entered from the keyboard and also causes
the DATA box above the camera display to light. If the keyboard
remains inactive for about five seconds, the camera display will
return to default mode and again display the camera number. The
third mode is for error display (reference the Error Messages
section of this manual). When the user enters an erroneous key
sequence, the keyboard beeps and an error number is temporarily
displayed (approx. 2 seconds). If an operator attempts to invoke a
restricted function, the camera number will be temporarily
replaced with an appropriate system error number. If an attempt is
made to access a monitor or remote device which has been locked
by a higher priority User, the camera number will be temporarily
replaced with an appropriate error number, then the user number
of the operator who placed the lock will be briefly displayed.
8.1.3 ON LINE Display
Directly above the camera display is the ON LINE display. The
LINE part of the display indicates the keyboard is electrically
Mode Displays
(LEDs)
Iris
Focus
Zoom
Memory
Set
Acknowledge
Alarm
Sequence
Program
Lock
End
Del
Previous
Next
Run
Execute
Numeric Keypad
LTC 8550/00 Series Keyboards
Monitor Number Display
Camera Number Display
Pan/Tilt Joystick
ST A R
ON LINE
DATA
ERR OR
On
Off
User
Shot
Monitor Camera
In
Out
Enter
Hold
Clear
S9506054BE
Detail of Pan/Tilt Control Pushbuttons
on LTC 8551/00Type Keyboard
connected to the Allegiant system. The ON display indicates the
keyboard is ready to operate. If the ON display is not lit and the
LINE is, the log-on feature of the system has been enabled by the
system installer and the
keyboard is waiting for a user to log-on to the system before
operation is permitted.
8.1.4 ERROR Display
The ERROR display located above the monitor number display
will light if a communication problem occurs between the
keyboard and the system.
8.1.5 Mode Displays
The Mode displays are various indicators that light up above
certain keys to show the keyboard status. The keyboard will stay
in a selected mode until all necessary data have been entered or
until the system has timed out.
8.2
Keyboard Controls
The descriptions below indicate the function of the key in its own
mode. A key may have other functions when used in complex
modes. See the appropriate operation section.
8.2.1 Numeric Keypad
This keypad is used to enter numeric data. When the first
numeric key is pressed, the camera display will become a data
display, and indicate the numeric keys pressed.
Digits 0 to 9 - The numeric digits are general purpose keys used
to enter numeric data. Any digit except a leading zero will appear
on the camera display. The keyboard will only recognize four
numeric digits at a time. If the data entered is not terminated in a
command in about five seconds, the display will clear and again
show the camera number.
CLEAR Key - The CLEAR key reinitializes the keyboard. In
some cases it can be pushed twice. If there are numeric data in the
camera display, the first push clears this data and the second push
returns the keyboard to the camera mode. This allows the user to
clear incorrect data without leaving the current mode. If there are
no data in the camera display, the first push clears the entire
keyboard back to the default state.
26
DATA
ERROR
Detail of Joystick Control on LTC 8552/00
LTC 8553/00 Type Keyboards
DATA
ERROR
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