Anybody know of a box that holds some number of 1.5 V cells and provides
power to a 1394/Firewire attached interface? Something with the powerless
spigot in and the powered spigot out for attaching 1394 powered interfaces
to notebooks lacking powered 1394.

I'm interested in attaching two cascaded Presonus Inspire 1394 interfaces
to my Gateway laptop. If anyone has experience with that interface can you
tell me whether or not the sample clocks are exactly synchronized when they
are cascaded? Is there a difference in latency between the two inputs or
between pairs when cascading them and if so, is it deterministic?

Seems to me that synchronization among cascaded units would be difficult
lacking word clock out or in. Not sure how hard it would be to synthesize
accurate audio rate clocks from the serial clock on 1394.


Thanks,

Bob
--

"Things should be described as simply as possible, but no simpler."

A. Einstein

"Bob Cain" wrote in message
...

Anybody know of a box that holds some number of 1.5 V cells and provides
power to a 1394/Firewire attached interface? Something with the powerless
spigot in and the powered spigot out for attaching 1394 powered interfaces
to notebooks lacking powered 1394.

There are noise issues with notebook 4 wire interfaces. For this reason
Tascam mandates the use of a six wire interface with their firewire decks.
Although Cardbus does supply some power, I suggest you pick a pcmcia card,
such as one of these,
http://www.wiebetech.com/products/cardbus.php
which have a 1.3mm jack for an external power adapter, or a similar card
with this feature.