dynaco

It looks like you have not had response by a knowledgeable regular so I will give you my best guess. RS-232 and TTL are two very different animals. The voltage levels on TTL are typically 0 to +5V while on RS-232C they are typically -12V to +12V. Based on what you said the connections indicated, I tried to find a manual to find out what the voltage levels really were but could only find a spec sheet that clearly indicated as, you said, "Camera Control: RS232C(TTL Level)" which does leave one a little confused. That being said, TTL is not generally used between devices. In addition, the TTL is enclosed in parentheses and you indicate the connections are labeled Ground, TxD & RxD. All of these facts would strongly suggest to me that it is RS-232 and as result you would only need a RS-232 to RS-485 converter. I would however want more than a guess by a stranger if I was hooking it up. I would look closely at the manual again and see if there is anything more definitive or a reference to what the actual voltage levels are. If the manual is not more specific, I might even contact LG support directly and ask they mean exactly by "RS232C(TTL Level)". Perhaps now a more knowledgeable person will step in and elaborate further. Good luck

I am looking for comments from those that have first hand experience with the MVL10 2.4 GHz video link. In particular I would like your opinion on the video quality and if it has enough bandwidth to support a high resolution camera (530 lines). I would also like to know if you have run into any RFI problems with 802.11 systems, either a problem with the video signal or a degradation of the 802.11 range and data rate. Thanks.

This is really for two installations, mine and a friends, and none of the equipment has been purchased as of yet. The installations are very similar in that the camera will cover a driveway where full visibility from the house, particularly where a vehicle would park is not possible. In my case I have 5.8 GHz telephone and 2.4 GHz 802.11b access point while my friend only has a telephone that I believe uses the 900 MHz band but I cannot be sure of the latter. In both cases we have an alarm system at the end of the driveway to announce a vehicle arriving but would like to see the blind spot if we are not quick enough to get to a window before the vehicle parks. Neither one of us have a desire to invest in recording what the camera sees. Based on what I have read here and other places I have decided to go with the CNB B2760NVF.camera since it seems to be of reasonable quality for not too much money. I have looked at a wireless link because that option gives the user the ability to easily change the location of the monitor. In my case a “nice to have” option would be the ability to see it on a computer screen since I am often at my computer located in a finished room of a walk in cellar at the opposite end of the house. The first priority however would have to be a standalone monitor setup on the first floor. In my friends case he currently does not have 802.11 system so that would only appeal to him if was the least expensive way to go. My current thought was to first purchase one camera and one wireless link and try it on the composite input of the TV and see how that worked before purchasing the monitor and any of the equipment for the second installation to cut my losses if my decisions were unsound.

I went to the URL and looked at all the data sheets for the various flavors of NanoStations and although I could find pictures that showed a CCTV camera connected to one of their devices, I could not find anything that indicated how the camera actually connected. Since the MVL10 had a composite video connectors at each end, I would have assumed these devices would as well but I cannot find a reference that confirms that. I have a funny feeling these devices are only meant to relay Ethernet TCP/IP data, but hopefully not. If you have information that would confirm this one way or the other you could share it would be appreciated. I don't want to purchase these only to find out I have to purchase additional equipment at each end to do conversions. Thanks.

Thanks to both of you for replying. You have convinced me that I should use IP. Do you have any recommendations on link equipment that works well? You say an "IP link will be significantly cheaper than analog" but have not found anything even in the same price range as the MVL10 ($120) let alone cheaper. Thanks.