luggsey Posted January 31, 2007 Posted January 31, 2007 At home I have got an el-cheapo Grand-X DVR PCI card with four inputs. I have realised that if I use cameras of a different make I get a sort of pulsing effect on the video of the next camera, if I use two cameras of the same make it seems fine. I set it to PAL N which seems to work fine for the two colour bullet cameras I use but if I add a cheap and nasty Microtec camera it screws the other one up. So I know how to avoid the problem, I know a more expensive setup will work better blah blah. What I would like to know is "what" is happening to cause this effect? ----------------------------------------------------------------------------------------------------------------------------------- Life is like a box of chocolates, some bugger always gets the nice ones! My Amateur Radio Forum
james.wilson Posted January 31, 2007 Posted January 31, 2007 i assume its a single chip card? and if so you have set all the same ie pal colour res etc? One thing to not is that some cheapy cameras dont output a clean signal (not 1v p-p) and can screw el cheapo kit up securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
luggsey Posted February 1, 2007 Author Posted February 1, 2007 i assume its a single chip card? and if so you have set all the same ie pal colour res etc?One thing to not is that some cheapy cameras dont output a clean signal (not 1v p-p) and can screw el cheapo kit up Yes , Yes and Yes! Thing is they all work ok as a "pair" but not a mix?? ----------------------------------------------------------------------------------------------------------------------------------- Life is like a box of chocolates, some bugger always gets the nice ones! My Amateur Radio Forum
james.wilson Posted February 1, 2007 Posted February 1, 2007 i can only assume there is something nasty or upi have a dodgy input. your cam hasnt got any so called enhancement options on it that just amps the main vid signal higher than 1 v. You can also try fitting a 75 ohm terminator to the spare input (or make one) securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
luggsey Posted February 1, 2007 Author Posted February 1, 2007 i can only assume there is something nasty or upi have a dodgy input. your cam hasnt got any so called enhancement options on it that just amps the main vid signal higher than 1 v. You can also try fitting a 75 ohm terminator to the spare input (or make one) Good point! Hadn't thought if trying that.... I'm not able to access all the bits and bobs I used to have at work.. Is it just a 75 ohm resistance brigded out? ----------------------------------------------------------------------------------------------------------------------------------- Life is like a box of chocolates, some bugger always gets the nice ones! My Amateur Radio Forum
james.wilson Posted February 1, 2007 Posted February 1, 2007 that will do but it isnt perfect, but just put a 75 ohm resistor across it securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
luggsey Posted February 1, 2007 Author Posted February 1, 2007 that will do but it isnt perfect, but just put a 75 ohm resistor across it I'll start digging the junk box tommorow! ----------------------------------------------------------------------------------------------------------------------------------- Life is like a box of chocolates, some bugger always gets the nice ones! My Amateur Radio Forum
james.wilson Posted February 1, 2007 Posted February 1, 2007 no probs securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
SystemQ Posted February 1, 2007 Posted February 1, 2007 At home I have got an el-cheapo Grand-X DVR PCI card with four inputs. I have realised that if I use cameras of a different make I get a sort of pulsing effect on the video of the next camera, if I use two cameras of the same make it seems fine. I set it to PAL N which seems to work fine for the two colour bullet cameras I use but if I add a cheap and nasty Microtec camera it screws the other one up. So I know how to avoid the problem, I know a more expensive setup will work better blah blah. What I would like to know is "what" is happening to cause this effect? Hi. The UK standard is PAL-I (thats an i, not a numeric 1) Please try this setting. The main difference is the audio sub carrier but I think the colour sub carrier may also be different on PAL N to I. Paul. System Q Ltd.
luggsey Posted February 1, 2007 Author Posted February 1, 2007 Hi.The UK standard is PAL-I (thats an i, not a numeric 1) Please try this setting. The main difference is the audio sub carrier but I think the colour sub carrier may also be different on PAL N to I. Paul. Hi, yes already tried that, the setting that includes "I" also includes BDGH as well. Double checked it and it made no difference. I did go through every mode combination when I set it all up, seems to be the el'cheapo microtec camera that screws it all up! ----------------------------------------------------------------------------------------------------------------------------------- Life is like a box of chocolates, some bugger always gets the nice ones! My Amateur Radio Forum
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