Specifications

SDR2-CF/SDR2-OEM-CF Configuration Guide rev 1.0 Configuration Menu Reference
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new file. Menu option 3 turns append mode on and off. The menu displays
the state of append mode.
When append mode is off, the SDR2-CF will generate a name for the new
file based on the current filename. It does this by incrementing the filename
using the characters 0 through 9 and A through Z. If the target filename
without extension is less than eight characters and append mode is off, the
SDR2-CF pads the name with zeros. Examples of filename generation are
shown in Figure 4.6.
Before Incrementin
g
A
fter Incrementin
g
BRIDGE.DAT BRIDGE01.DAT
BRIDGE01.DAT BRIDGE02.DAT
BRIDGE09.DAT BRIDGE0A.DAT
BRIDGE0Z.DAT BRIDGE10.DAT
BRIDGE10.DAT BRIDGE11.DAT
Figure 4.6. Generating filenames when append mode is off.
Note: A disk’s root directory typically holds only 512 directory entries. To
avoid exceeding this 512 file limit, do not record using the root directory in
environments where power will be lost frequently.
4.3.4 Set scheduled file close parameters
The SDR2-CF can periodically close and reopen or create new files
automatically. This is useful to ensure that data is committed to the disk,
especially when recording at low data rates. When used with append mode
off, scheduled file closings ensure that your data files are a manageable size.
Each file is stamped with the date and time when closed, which can later
provide useful diagnostic information.
Files can be closed on a time or file size basis. To schedule file closings, type
4 from the Recording Parameters submenu. When prompted, either chose
to close files based on file size or time interval (up to 4294967296 seconds).
In Figure 4.7 the user is specifying that the file will be closed every hour of
recording time.