LTM-DVDA5P
1x4 IEEE1394
Signal Distribution Amplifier
CE
© 2006 Laird Telemedia.
Model LTM-DVDA5P User Manual
800-898-0759 • 845-339-9555 • 2000 Sterling Road • Mount Marion, NY 12456 • www.lairdtelemedia.com
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LTM-DVDA5P
1x4 IEEE 1394 DV
Distribution Amplifier
INPUTS One 1394 DV input with loop out. Looping output can be used to
expand the input to other devices including additional LTM-DVDA5P
Note: Looping output cannot be used for a PC if other PCs are con
nected to outputs.DV Inputs are transparent to the 1394 bus, and
appear as a node.Automatically switches between NTSC and PAL
OUTPUTS Four 1394 DV output ports with power available to power repeaters
Each output port forms a new 1394 connection, independent of the
other, in true DA form. Each output independently responds to
1394 Interface AVC commands Stop and Play
COMPATIBILITY Supports IEEE 1394 - 1995 Standard and P1394a high performance
serial bus supplement. Supported port speeds 100/200/400Mbps.
Compatible to FireWire
TM
, iLINKTM, using IEEE1394 standard.
Operates under PC Windows 98/SE/ME/XP/2000 OS and iMAC
system IEEE1394 protocol.
Supports asynchronous and isochronous data.
RS232 Firmware can be field-upgraded through the RS232 port
POWER 12VDC, 1A 110/220V AC adapter provided
DIMENSIONS Size on desktop: 8.25in. x 2.0in. x 6.7in. (WxHxD)
Size in Rack: Rack wide,1U tall and 6.7in. deep
(1U rack mount kit available)
TECHNICAL SPECIFICATIONS
The LTM-DVDA5P represents the best technology in production quality DV based
equipment. It was developed with the work demands of the modern media facility
in mind.With the increasing use of DV IEEE1394 based equipment, the need for the
ability to distribute and copy DV signals is elegantly answered by the LTM-DVDA5P.
It is very simple to use and is extremely intelligent in its operations.The basic operation is to use any DV media source equipment and then make copies on compatible devices such as PCs,DVCAMs, or any firewire based equipment that conforms to
the IEEE1394 standard.
The product has been designed to work around the typical limitations of PCs as dub
machines. It is transparent and works seamlessly with compatible equipment.
800-898-0759 • 845-339-9555 • 2000 Sterling Road • Mount Marion, NY 12456 • www.lairdtelemedia.com
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LTM-DVDA5P
1x4 IEEE 1394 DV
Distribution Amplifier
A Few Notes About DV technology: Before you use your DV signal distribution amplifier, it
would be wise to study a bit about the technology . This will help you to understand the basics
of the technology as it relates to your applications and requirements.
Defining the terms:
IEEE1394 - This term refers to the data transfer protocol standard similar to USB, for computers and related media equipment. It is designed for “short haul” applications and was
developed originally by Apple and called Firewire. It is a true Arbitrated session-oriented network integration technology . Various manufacturers have adopted this protocol for digital I/O
on their equipment. Although it may be called different trade names such as I-Link, which is
Sony’s name for 1394.
DV- Digital Video which uses IEEE1394 for transfer. Often confused with IEEE1394 or
Firewire, the fact is that DV is just one of many possible signals that takes advantage of
1394(Firewire) transfer protocol. This is due in part to the relative friendly packeting similarities that DV and 1394 have,which require lesser emulation and conversion for protocol compliance. DV in its native format is a compressed audio/video signal at about 5:1 compression
with 4:1:1 or 4:2:0 sampling. Often referred to as DV25,this format also passes machine control and time code on compatible equipment.
Hot-swap- This refers to the ability to remove or switch a DV device without exiting the software running the device. 1394 is a managed peripheral system and cannot be hot-swapped
or cold-switched unless the software and hardware is designed for this. If you simply switch
away or to a running DV device such as a NLE or any computer involved in DV operations ,the
PC may “hang-up”or “crash”as the port reports the loss of duplex operations to the system.
In most cases it is safer to simply switch to the device required,then enable the software. The
same should be followed for switching from a device.
Differences in DV equipment- There are several 1394 based systems that are not
compatible with each other.
DVCAM –Sony’s DV based system using 28.22mm/Sec tape speed and a 15micron track
pitch.
DVCPRO –Panasonic/s DV based system intended for broadcasters using a tape speed of
33.82mm/Sec with a pitch of 18microns. Older DVCPRO equipment is not compatible with
standard DVCAM or for that matter any other DV format. Recent Sony equipment such as the
DSR2000 does however playback DVCPRO tapes. Older DVCPRO equipment needs an
upgrade to playback DVCAM tapes.
NOTES ABOUT IEEE 1394 DV TECHNOLOGY
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