Model VR240 Audio Logging Recorder
January 2000
5-27
after the selected time. Finally, searching for a time after the end
of the media will result in a
NOT Found
message, which may
occur immediately, or may require an actual search to determine.
Pressing
Cancel
after initiating a search aborts the search as
quickly as possible, leaving the media at an undetermined
location.
Cancel
Returns you to the
Search
menu.
Note that when you select the
Search
menu, any play operation in progress is interrupted, just
as it would be if you pressed the
Pause
key. If, however, the
Search
was unsuccessful, the
unit will enter the
Pause
mode upon exiting search. You can resume playing by hitting the
Play
transport key, or by re-entering your search
Time/Date
and finding a location on the media. An
additional indication that the media is
Paused
is the simultaneous illumination of the
Play
and
Stop
transport key LEDs.
The time required to
Search
for a particular location on media is not directly proportional to the
distance away it is from the present media location. The media in the digital drive actually
moves quite rapidly. A complete physical rewind requires well under a minute. However,
additional overhead and media positioning is required. The combined effect is that a search for
a nearby location might take longer than expected, and a search to the other end of the media
might take less. Searching to any time on a 120-meter DDS typically requires under a minute.
Searching can take significantly longer under two circumstances: If the media is very sparsely
recorded, i.e., there are large time gaps between any information; or, if you are searching by
channel and there is a long distance before any information on that channel. Searching the
internal hard disk or a Rewriteable DVD-RAM disk uses completely different technology that
allows a search point to be found almost immediately.
NextMessage
Press this key to step through messages as they occurred from the search
time forward. The VR240 looks for pauses between messages and uses them
as an indication of where one message ends and another begins.
Scan
Scan
gives you the opportunity to perform a “local” fast forward and rewind,
and to watch the time while doing so. Audio will play if present on the channel
selected. Hitting
Scan
presents a submenu with the following choices:
BackOneSec
(Back one second) Gives you the opportunity to move
backwards and, if you wish, to replay a short segment of
material. Because the digital drives will not play backwards,
the VR240 stores the most recent segment of media
information in a “buffer memory location” on the internal hard
disk. Hitting
BackOneSec
steps backwards through this
memory a second at a time. (Holding the key down steps
backwards faster.)
You cannot step backwards beyond a certain number of seconds. This time
period is determined, in part, by how many channels are stored in the buffer.
The more channels, the shorter the period. At most, several minutes may be
reviewed. If you press or hold the key and no more buffered data is
available, the message
can NOT examine back any further, use GoTo
is
briefly flashed on the display.
