3006-dva.ib.doc
Page 3 of 8
26.02.2003
General Description
The DVA-3006 270 Mb/s serial digital video distribution amplifier provides the user with a single standard
module to cover a wide range of distribution and monitoring functions for ASI or SDI signals.
Due to the fact that standard loop through techniques used in the analogue domain are unsuitable to the digital
domain most digital equipment comes with no facility to route the input signal to other locations.
As a result a DA is required at almost every point in the digital chain.
Serial digital signals also suffer severe deterioration over relatively short cable distances. The DVA-3006 provides
a means of extending the working distances that can be achieved by equalising and re-transmitting the data in mid
route.
The DVA-3006 may also be used to provide input equalisation for devices not having this feature, as most
unequalised inputs will only support cable lengths of less than 20 metres.
Frequent re-clocking of serial digital signals can lead to serious increases in jitter with resultant data errors. The
DVA-3006 does not include re-clocking so as to minimise these errors, leaving re-clocking to be done by the
receiving device. For applications requiring reclocking the DVA-3007 should be used.
An optional rear assembly, ZVA-3006RL (sold separately), provides a bypass relay to switch the Input (SK1) to
Output 1 (SK2) in the event of a power failure. When this bypass rear assembly is used, number of outputs is
reduced to 6.
The DVA-3006 may be mounted in IRT’s 1 RU or 3 RU frames with other analogue or digital modules.
Standard Features:
•
For use as buffer or distribution amplifier.
•
8 x in phase 270 Mb/s ASI or 143, 177, 270, 360 Mb/s SDI non reclocked outputs.
•
Automatic input equalisation to 250 metres.
•
Front panel monitoring output, signal presence LED and external alarm contacts.
•
Non reclocking design ideal for use in conjunction with reclocking DA to provide
additional outputs.
O/P 2
O/P 3
O/P 4
O/P 5
O/P 6
O/P 7
O/P 8
OUTPUTS
EQUALISER
SIGNAL FAIL
DETECTION
INPUT
Relay RL 1 = Output Alarm
LINK
ALARM O/P
RL 1
BLOCK DIAGRAM DVA-3006 SIGNAL PATH
O/P 1
MON O/P
(Optional ZDA-3006RL Bypass Rear
Assembly)
(Number of outputs reduced to 6)
RL1
IRT
Communications
www.irtcommunications.com