Larson Davis System 824, Техническое справочное руководство

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9/29/09 Front Panel Keys; Functions and Menus 3-29
The default value of this setting is 10
allocated setup registers (which uses
5120 bytes of memory). The System
824 has ten permanent ID registers.
These pre-defined ID registers
cannot be changed or deleted and do
not reduce the amount of data
memory available. They are to be
used primarily as templates for new,
user-defined IDs. Allocated ID’s - Determines the number of setup registers
that are allocated in memory for storing IDs. In essence, this
setting determines how much memory is allocated for stor-
ing instrument definitions. Setting this to a higher value
allows more IDs to be created, but reduces the amount of
memory available for data storage by 512 bytes per allocated
ID.
Create EEPROM Backup - Stores the most recently used
SSA, ISM, and LOG IDs so that they may be recreated in the
event of a memory loss.
Important: In order to not lose your
customized settings in the event of
memory loss or firmware upgrade,
follow these steps.
1. Alter the permanent IDs as desired and save your
customized setting using a name of your choice.
2. Enter the unit Name and other system settings in the
TOOLS>About menu
3. Bring your favorite ISM, LOG and SSA ID to the top of
the SETUP ID menu by selecting them one at a time. Alter a
permanent ID and save your customized setting using a
name of your choice.
4. Store these settings permanently using the TOOL>Mem-
ory>Create EEPROM Backup menu item.
Your settings will not become permanent.
Repeated whenever you update any of the system settings or
IDs that you want to be permanent.
Deleting Stored Data
Delete Last Function The Delete Last feature will allow the user to delete the very
last record stored in memory from any instrument type. It
also allows you to recall a file, delete individual records
within that file, run the instrument again and append new
data to memory. Essentially the record is
unstored from
memory.
824 Memory Structure The memory structure of the 824 is a forward and reverse
linked list. This means that for each type of data there is a
pointer to the first record and a pointer to the last record and