Overview
3
3
3
Overview
This section summarizes:
•
The
VS-40FW
see (section
3.1
)
•
FireWire® (see section
3.2
), FireWire® 800 (see section
3.2.1
) and
FireWire®
compliance (see section
3.2.2
)
•
How to achieve the best performance (see section
3.3
)
3.1 About the VS-40FW
The
VS-40FW
is a high-performance bidirectional hub/repeater for 9-pin
FireWire® 800 (IEEE 1394b) signals. It increases the number of ports
available and/or extends the distance of FireWire® cable runs.
The
VS-40FW
features:
•
4 bidirectional IEEE 1394b 800Mbps (S800) ports
•
A range of up to 9m (30ft). This is double the FireWire® range of 4.5m
(15ft). Multiple units can be cascaded to extend the range to up to 72m
(240ft)
•
Support for Plug and Play
1
, hot swapping
2
and isochronous
3
•
Transfer Rates of 100, 200, 400 and 800Mbps
and
asynchronous applications
•
ESD Protection
4
The
VS-40FW
can supply up to 2.1A to the bus (each port can provide up to
1A). An external 12V DC power supply, or can be powered via a
FireWire® connection from a PC.
- incorporates Kramer’s Spark-Guard Pro™ signal
protection circuitry to help protect against EDS (electrostatic
discharge) that can damage digital equipment
1 When a device is added or removed, the 1394 bus re-enumerates and configures automatically
2 You can connect and disconnect inputs and outputs dynamically, without having to restart the PC or cycle power
3 Video/audio applications require constant transfer rates, which the serial bus provides by supporting isochronous transfers
4 Sometimes when connecting a "live" DV source to a receptor, an electrical potential difference or any other element
creating a high voltage (such as ESD or a live chassis) may permanently damage one or both of the connected devices. This
high voltage may be seen as a spark occurring at the instant of connection, or may not be seen at all, but nevertheless can
result in costly damage
