Specifications

8-3
User Patterns and Disk Operation
Define, Edit and Store User Defined Patterns
Figure 8-1 The Editor
The Editor
The editor always edits the contents of the user pattern memory. Thus if you wish to edit
one of the twelve pattern stores, you must first load the pattern store into the user pattern
memory, edit the pattern, then save the pattern back to the pattern store.
Editor Features
You can use the pattern editor to perform the following:
• Load into user pattern memory and edit/output one of four internal pattern stores or one
of eight disk pattern stores.
• Load and edit one of four fixed PRBS patterns of 2^7, 2^10, 2^11 and 2^13.
• Copy the contents of one user pattern into another user pattern.
• Select between binary and hexadecimal displays.
• Save the contents of the user pattern memory (current pattern) to one of the four
internal pattern stores or eight disk patterns.
• Load the contents of a pattern store to a precise point in the user pattern memory,
highlighted by the display cursor.
• Define a block of bits within the user pattern memory and save to a pattern store large
enough to hold the block.
• Delete a block of bits within the user pattern memory.
• Alter display size to allow simultaneous display of results information while editing.
Pattern Stores
There are twelve pattern stores as follows:
• Pattern Stores 1 to 4 can hold patterns up to 8 kbits in size. The data is held in non-
volatile RAM.
• Patterns 5 to 12 are held on disk and can accommodate patterns of up to 8 Mbits in
length, subject to a disk with sufficient free space being available. These patterns are
held in separate files on the disk.
Current Pattern
The softkey enables the user to access the pattern currently stored
in user pattern memory. This is the pattern that is output, when the user selects a User
Pattern as the active output pattern.
CURRENT PATTERN