Grass Valley M-Series iVDR User Manual v.2.0.10 - Manual (Page 66)

66 M-Series User Manual 20 April 2005
Chapter 3 Product Description
E to E considerations
If E to E mode is enabled, you can connect an external reference signal which is
synchronous to the video input. This will eliminate artifacts on the play channel
output (periodic vertical shift) due to routing an asynchronous signal through the
iVDR. However, this is not required for recording, the iVDR can record asynchronous
signals.
NOTE: E to E is provided for monitoring the record channel, and is not intended
as a program switch.
Determining storage capacity
Internal media storage can be configured with three or six disk drives depending on
the storage option installed. A storage option adds three disk drives. Storage options
available include of 36GB, 73GB, and 146GB disk drives. These storage options can
be mixed, for example the iVDR can contain the three 36GB disk option with the three
146GB disk option.
The following tables show the storage capacity estimates based on the number of disk
drives installed and the video data rate. The estimates in the table are based on use of
four audio channels and one time code channel per video channel using the 525 video
format.
NOTE: Storage capacity will increase as larger disk sizes become available.
Storage capacity estimates in hours using 36 GB drives:
Video
Data Rate
a
a.
Calculated using 1 video track, 4
audio tracks, 1 timecode track,
and the 525 video standard.
Number of Drives
3 6
18 Mbs 10 hrs 20 hrs
20 Mbs 9 hrs 18 hrs
25 Mbs 8 hrs 16 hrs
50 Mbs 4 hrs 8 hrs