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Configuration Menu AM64/128A User Manual
36
5.7.5 64k Mode
This mode is designed to be used in association with the X.50 framing patterns. When the mode is selected
the master BBM is set to 64k and the slave is (usually) set to 48k X.50. This allows the master BBM to
become transparent to the X.50 framing structure, allowing it to be processed by the master DTE.
The mode is normally OFF, displayed as: C > 64K Mode Off
Pressing SELECT gives: C > 64K Mode On
5.7.6 Power Level
This items selects the output power level of the transmission circuitry. There are two options:
C > Power 10dBm High power
C > Power 0dBm Low power
Normally 10dBm is selected, the 0dBm option is intended for short lines, and to reduce interference to
other equipment.
5.7.7 Menu Lock
This item is to enable the user to restrict access to menus once the BBM has been correctly configured.
The normal mode is displayed: C > Menu Unlocked
When the menu is locked the display changes to: C > Menu Locked
When locked, the SELECT key is disabled and no items in any menu can be altered. The only available
option is to unlock the menu. To prevent accidental locking/unlocking, the SELECT key does not function
normally for this feature. The lock is activated by selecting the STATUS MENU and then pressing three keys
simultaneously.
These keys are (1) left menu key
(2) SELECT key
(3) TX NRDY key
The keys should be pressed in the order listed, in order to prevent activation of the TX NRDY feature.
When these keys are pressed the display will show: >> Menu Locked
This message will be displayed for about 3 seconds before reverting back to the status display. The menu
is now locked and if the configuration menu is examined it will display the locked message.
Pressing the same three keys again will unlock the menu: >> Menu Unlocked
The operation is a toggle action (i.e. lock - unlock - lock), just like the normal SELECT key operation.