Specifications
8-9
User Patterns and Disk Operation
How to Set Up and Edit Your Own User Pattern
ToLoadaPRBSorUserPatternintotheEditor
The editor load block function enables the user to load one of four fixed PRBSs, or the
contents of a user pattern store into the user pattern memory at the current cursor position.
The current setting of the softkey determines whether the contents
of the PRBS or pattern store (the block) are inserted into, or replace bits in the pattern.
The number of block bits loaded from the PRBS or pattern store is tailored to fit between
the cursor and pattern end. For example if the cursor is sitting on bit 500 of a 900 bit
pattern, then when a block load is performed up to 400 bits can be inserted/replaced. If
you wish to load a pattern larger than the defined pattern length, then you must increase
the length accordingly.
To Load a Block of Data (PRBS)
The following procedure explains how to load a fixed PRBS into the editor.
Procedure
1. Select , .
2. Select the pattern store into which you wish to load a block of data. (for example
).
3. Set the cursor to the bit in the pattern where you wish to insert/replace a block of data.
Use the display knob or softkey.
4. Set the softkey to the desired mode.
5. Select - the menu changes to give a sub-menu set of softkeys, offering
the choice of selecting a fixed PRBS of , , or ,or a
or . For this procedure, select a PRBS.
6. When you select a PRBS the right-menu changes to give softkeys of
,, and .
If you do not wish to edit zero substitution or mark density, press then
proceedtostep9.
To Edit Zero Substitution
7. Press the softkey. Enter the value of the longest run of zeros using the
numeric keypad (see bottom of screen), and then press . Now press
.
To Edit Mark Density
8. Press the softkey. The right-menu changes to offer softkeys of
,,,, and ,selectfromthechoicesgiven
or press .
INSERT/REPLACE
pattern
edit ram usr
INTERNL PATT 4
goto bit
INSERT/REPLACE
load block
2^7 2^10 2^11 2^13
ram Usr pattern diskUsr pattern
set zerosub
NO MODIFY zero sub mark density cancel load
NO MODIFY
set zerosub
ENTER
zero sub
MARK DENSITY
1/8 1/4 1/2 3/4 7/8 cancel load
cancel load