User manual PHILIPS LTC2275

[. . . ] LTC 2275 Series LTC 2277 Series LTC 2278 Series VidQuad® Color Video Processors Philips Communication & Security Systems Instructions for Use IMPORTANT SAFEGUARDS 1. Read Instructions - All the safety and operating instructions should be read before the unit is operated. Retain Instructions - The safety and operating instructions should be retained for future reference. Heed Warnings - All warnings on the unit and in the operating instructions should be adhered to. [. . . ] These cables can be cut to desired length, and the end insulation stripped off for connecting external devices. 4. 7 Alarm Inputs 4. 7. 1 LTC 2277 Series and LTC 2278 Series The alarm inputs are defaulted to be normally open. These can be individually changed to normally closed via the Alarm menu. CAUTION: Do not apply external voltages to the alarm inputs. Belden 8760 twisted shielded cable (or equivalent) should be used for wiring to the alarm connector and the total length of unshielded cable should not exceed 10 cm (3. 9 in) on each connector port to maintain compliance with Directive 89/336/EEC. Use only isolated closures or open collector logic. Precautions should be taken, particularly on long runs, to prevent pickup of spurious signals from associated wiring which may give false inputs or damage the unit. Refer to the Alarm/Accessory Connector - Pin-Out under ILLUSTRATIONS. 5. 1. 1 Initiating Menu Programming To start a menu programming session, press the MENU button. The operator will be prompted to enter a password, consisting of a three button sequence of the front panel buttons. The password can be programmed by the operator. The factory setting for the password is SELECT, SELECT, SELECT. Note that the SELECT button is not normally a valid password button and cannot be used in a new password when it is set by the operator. The only time that this button is used in the password is as a factory default on new units. Buttons which are used in normal MENU operation the MENU, SELECT and ARROW buttons - are not valid as password buttons. Once the correct password has been entered, a main menu will be displayed, showing each of the major sections that can be programmed by the operator. In general, the onscreen prompts will be all that are needed to guide the operator through the steps to select and program the options. Each screen prompts the operator on the correct buttons to use for various options and functions. 5. 1. 2 Selecting Menu Items Move up and down through the menu by using the up and down arrow buttons, and choose a menu item by pressing the SELECT button. This will bring up a new screen which allows the operator to select options or enter data related to the menu item which was chosen. Option Selection In menu screens where items in a list must be turned ON or OFF, use the left or right arrow buttons to toggle the status of the current entry, then press the down arrow button to move on to the next entry. The up or down arrow buttons are used to skip over or select entries on the screen. When there are more entries than can be displayed on one screen, the screen will scroll automatically when the down arrow is pressed on the bottom entry. The up arrow can be used to scroll up to preceding entries if needed. [. . . ] 5. 3. 1 Alarm Input Handling There are three ways of handling alarms, which may be selected by the operator in the setup MENU. 5. 3. 2 Latched Alarms Alarms are latched as they become active. An alarm is cleared when the operator acknowledges it. Note: When the operator acknowledges (cancels) the alarm, it will be cleared whether the alarm input is still active or not. [. . . ]