[jitter] firewire adapter

Has anyone used Unibrain's firewire 800 optical repeater?
http://unibrain.com/Products/p1394/GOF.htm

I'm thinking of using it on a project and I'm curious if anyone has  
experience with it
thanks
Ed

On Feb 28, 2008, at 3:47 AM, Thierry Fournier wrote:

> Yes, but it depends from your goals and the cam you use : BNC and a  
> DFG1394 is fine and makes you work with analog cams and a PAL  
> input, FW cams allows you to work at different and/or higher frame  
> rates and/or resolutions.
>
> And, Yair, you were lucky because we, had some latency and frame  
> loss last year with Unibrain repeaters... I stated that they are  
> not as stable as the industrial ones.
>
> Best
> Th
>
> ----------------------------------------
> Thierry Fournier
> http://www.thierryfournier.net
>
>
>
>
> Le 28 févr. 08 à 09:30, yair reshef a écrit :
>
>> contrary to published specs, i bought a 10m fw cable from unibrain  
>> (30$) ages ago and it never failed to work, including supplying  
>> power and at harsh outdoor conditions. the 4.5m limit is not.
>> for longer runs i prefer a dfg1934 A/D and a BNC.
>>
>> On Thu, Feb 28, 2008 at 8:55 AM, Thierry Fournier  
>> <thierry at thierryfournier.net> wrote:
>> Hi Hans,
>>
>> I got this problem several times, and we solved it as we bought
>> professional FW cables and industrial repeaters. The cables are 10 m
>> long, you can plug up to 3 cables and 2 repeaters. It's expensive (a
>> 10m cable = 51 euros HT, a repeater = 79 euro HT, so a 20 m
>> connection costs 216 euros TTC), but much cheaper than a
>> professionnal fiber-optic extender which costs around 600 euros. We
>> used it in an installation, we had 2 x 10 m with a 640 x 480 FW cam @
>> 60fps, no trouble.
>>
>> No advertising :-) but if you are always in France you can ask Imasys
>> for that (www.imasys.fr), they distribute the Stemmer products
>> (www.stemmer-imaging-group.com). The product references are KAB
>> FIREWIRE-10M and ZUB IEEE1394A-REPEATER-INLINE.
>>
>> hth.
>>
>> Best,
>>
>> Thierry
>>
>> ----------------------------------------
>> Thierry Fournier
>> http://www.thierryfournier.net
>>
>>
>>
>>
>> Le 27 févr. 08 à 21:01, Piet Johan Meyer a écrit :
>>
>> >
>> > On 27.02.2008, at 16:23, Hans Mittendorf wrote:
>> >
>> >> For a project I need to extend my iSight camera. I bought an
>> >> adapter 6F/6F to connect a long firewire cable to a hub but I do
>> >> not get the signal through.  When I plug direct it works. Has
>> >> somebody an explanation for that?
>> >
>> > Firewire 400 (IEEE 1394a) has a maximum cable length of 4.5m (that
>> > includes data and electricity streams). If your hub functions as an
>> > active repeater then you can daisy-chain to a max length of 9m. If
>> > your cable lengths are 4.5m or shorter, your hub might not provide
>> > the iSight with the 500mV it needs to function.
>> >
>> > If you need to bridge over a longer distance you'll probably have
>> > to look into using a fiber-optic extender for example the gefen
>> > firewire extender (30ft to 300ft / 10m to 100m). Unfortunately,
>> > those things are pretty expensive. Alternatively, you'll could use
>> > a second computer to stream your video over a network or use some
>> > old firewire harddrives as active repeaters.
>> >
>> > Cheers,
>> >
>> > Piet
>> >
>> >
>> >
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>>
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