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Page 42
6.3
Master Record Controls (continued)
6.3.4
6.3.5
6.3.6
Rev.: 1.0
Record by Time − Master Recording
To record for a period of time, set the Transfer Time numeric entry window
to the number of seconds for the master recording. This entry accepts a
floating point value, allowing you to specify resolutions smaller than 1 sec−
ond.
After the recording starts, recording of all master−controlled channels will
automatically stop after the elapsed time specified.
NOTE:
The minimum record time is 1 millisecond.
NOTE:
If the Transfer Length is greater than the total free disk space, the
recording will stop when the disk is filled.
Master Status
The master recording Status field will display Stopped or Recording
reflecting the current master recording operating mode.
Master Data Loss
The Data Loss indicator lights up red if data in any of the master recording
channels is not recorded to a file. If the Data Loss indicator is not lit, then all
the data for all master recording channels was recorded successfully.
Data loss is flagged by the recorder when any condition that results in a dis−
continuity of the data stream occurs. The Talon recording system flags this
data loss in both the real−time status as well as in the recording's file header.
The file header also includes a field that contains the location of the last
good (contiguous) data recorded, so the operator can use the portion of the
recording that is still good.
Data loss can happen for a number of reasons. Any time that the storage
drives fail to keep up with the real−time stream of data from either A/D
converters or a digital interface will result in a real−time data loss. This
could happen if the system parameters are set up in a way that results in a
higher aggregate data rate to disk than the system can handle. The following
are other potential causes of data loss:
• An almost full or highly fragmented disk
• Selecting the wrong drive to record each file to
The operator should consider all of these possibilities when observing data
loss and take care to create an environment that results in error−free record−
ing every time.
Talon RTX 2767 Operating Manual
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