vadsys

our exhibitions: CPSE Beijing 2008 IFSEC NEC 2009 CPSE Shenzhen 2009 ISC West 2010 IFSEC NEC 2010 ------------------------ hope to meet some of you there!

Video specs: 8/10bit with 8M bandwidth and 16MHz sampling. SNR>67dB input level 1Vp-p with auto gain control DG<1% DP<1' Data specs: rate: up to 115.2kbps compatible with RS232,RS422,RS485 (half/full duplex),bi-phase,Manchester code Distance: MM fiber: 2km SM fiber: 20km,40km,60km,80km,120km without repeater or amp

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hi there, VADSYS designs and manufactur digital modulation fiber transmission systems.It is a SGS ISO9001 certificated factory,and responsible to every small,medium and large business. We could custom design fiber converters for different fibers and complex function capabilities for you with reliable and good quality. Our warranty: 3 year with RMA policy -------------------------------------- www.vadsys.com mail to: info@vadsys.com P.S.: we provide proposal against tender specs for FREE!

that's right, as i mentioned, it is not possiable that 7 cameras out of work because of the PTZ. firstly,check the optical loss, for years of fiber laying, or after soldering over and over, the loss will be enlarged over the budget.

maybe it's just because the camera's ptz was broken? it might be, but 7 out of 10 cameras' ptz were broken? I prefer the fiber's story... besides, it is a FAQ on fiber's issue such as this situation, isn't it?

pls check my post in your thread. should check the fiber optical loss first, since video could be display but not data,the problem is not possiable on fiber Tx/Rx....

mostly the problem is about the attenuation of the fiber,as i mentioned in my pre-post, check the optical output power first. you know, for video transmission from camera to monitor, the wavelength is 1310nm, but for the reverse data to the camera, the wavelength is 1550nm.so if the link loss is beyond the budget loss, video still can be displayed,but data can not be arrived at cameras If the fiber has been laid for years,or over soldered, they may casued a big link loss.

this is really pretty old thread to connect cameras with F.O. is very simple, F.O. has 75ohm BNC connectors for video connection, terminal blocks for PTZ data and power supply,SC/FC/ST fiber adapter for fiber cable connection

hi vin_sys, there are lots of possiabilities on this issue may happen. 1st, go check the optical power output,link loss.perhaps the optical attenuation was changed 2ed, do you mean you use the cascade solution with two fibers go through all the 10 cameras in line, just like series-wound?if it is true, maybe it is the F.O. system not so stable, check this with the rep. of ONV. any question, just feel free to send me PM or contact me directly: vad.joseph @ gmail . com btw, we have full range of F.O. solutions, next time may try ours attached the solution scheme for you reference cascade fiber solution.rar

hi 3RDIGLBL, seems pdf file is not allowed in attachment there, i try to attach a rar file. any question,just feel free to contact me VDS2850.rar

hi 3RDIGLBL, actually it is not so complex as you thought on fiber transmission.For 8ch PTZ, if all the cameras are near close, you can choose a 8ch fiber Tx&Rx with 1ch data (make sure what kinda of fiber,single-mode or multi-mode, and what's the data protocol for the PTZ) if every camera are located not so close, you can choose 8 individual 1ch Tx, Rx in a rack case. check the file attached.

hi PG, since its fine before it went into the fiber, and it worked bad as well in another three cards, the issue was not on the Tx/Rx.Check the input level again. PS,welcome to try our fiber Tx/Rx, it has AGC to avoid such situation. www . vadsys . com

Wow,man, why not try ours fiber Tx & Rx. Better service than GE such a big company, one of the best quality product in China.Our chipsets are also purchased from US, but the price we request is very reasonable.

quite right!! and the cost of fiber equipment also cheaper than before now..try some new, it will be good for your further projects.