KEYPAD
SOLOIST-2S
VERSION 1.0
MPEG 2 PLAYBACK SYSTEM
4/18/01
V1.0-11
ADTEC, Inc.
USA
EMT
The Ethernet Multicast Transfer (EMT) is a proprietary protocol designed by ADTEC for high-speed
distribution of files. It is used when two or more units reside on a LAN and require the same MPEG files.
EMT resides at the physical layer of the Ethernet Protocol and operates by multicasting files from a
designated solicitor to all subscribers on the network. The solicitor will accomplish this by using one of two
modes. In half duplex mode the solicitor will continuously multicast all files in its directory without requiring
acknowledgments from subscribers. In full duplex mode the solicitor will broadcast a solicitation every three
seconds to see if any subscriber needs the file. If the solicitor receives any subscriptions it will then begin
multicasting the file. The subscribers will then be required to send periodic acknowledgements until the file
is finished multicasting.
******************WARNING******************
In order to distribute files in the least amount of time EMT has been highly optimized and will use
in excess of 90% of the available bandwidth on a 10baseT network. If your ADTEC equipment is
connected to the rest of your LAN or a WAN it is highly recommended that a router/bridge be used
to either block all broadcast or EMT transmissions only. EMT uses a proprietary packet type of
ADEC (hex). Please see your network administrator for more details on how to set up a
router/bridge. In the absence of a router/bridge the amount of bandwidth used by EMT can be
constrained by lowering the Upper Bit Rate of the EMT Setting at the expense of slower file
distribution.
Duplicate Drive
Allows the user to assign a specific Hard Drive as a source drive to automatically copy files. This is useful in
situations where a JAZ drive is used to update files. The spots are copied from an encoder to a JAZ disc
and carried (Sneaker-Net) to the remote Jaz drive connected to the SOLOIST-2S Solicitor. Upon insertion of
the new JAZ disc the automatic copy process will copy the new file to the Solicitors Hard Drive. Automatic
overwrite is handled by the most current file date. To assign a Duplicate Drive, input the ID number of the
hard drive into the Duplicate Drive Setting.
******************WARNING******************
Never load a Jaz disk into the Jaz drive while the Soloist-2S is on air. The disk logging process
will cause the unit to macro block. The unit will recover in approximately 10 seconds if a disk is
accidentally loaded.
