HP 54750A, User Manual, Page: 368 / 478

The General Function Menus
Limit T est Menu
NNNNNNNNNNNNNN
Disk
Disk stores the summary information to a disk. The
Store Summary menu allows you to specify the rst four
characters of the le name . The last four characters are
reserved for consecutively numbering any subsequent
summary les stored to the disk. If you select SUMM as the
rst four characters of the le name , the le name of the
summary le stored to the disk is SUMM0000.SUM. The
le name of the second summary le stored to the disk
is SUMM0001.SUM. Each subsequent time the instrument
stores a summary le to the disk, it checks which les are
already on the disk, then increments the last four digits of
the le name by one . If you change disks , the le number
starts over again at SUMM0000.SUM.
Theoretically you can have up to 9,999 summary les .
However , there are two limits that keep you from obtaining
that many les . The rst limit is with MS-DOS itself.
MS-DOS limits the root directory to 224 entries (an entry is
either a le name or subdirectory). Because the instrument
can only access les in the root directory , that limits the
maximum number of les the instrument can store to a disk
to 224.
The second limit is the potential size of a summary le .
The size of the summary le depends on how many
measurements are made and the setup of the Run Until
softkey .
Usually you will not have 224 summary les . However ,
if you are also storing screen and waveform information
to the disk, there is the potential to ll up the disk. If
the instrument cannot store additional les to the disk,
the header portion of the summary is still updated, but
additional logs are not appended to the summary le .
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