Mallincam wavy lines on monitor?
Posted 04 April 2013 - 01:43 PM
the monitor up high. You cannot see them when I turn down the brightness. I get it on both S-Video and composite video. Is this normal or should I be looking for some inference? Thanks.
Posted 04 April 2013 - 02:50 PM
Posted 04 April 2013 - 06:17 PM
If so, Google ground-loop interference, lots of fixed out there!
Posted 04 April 2013 - 07:11 PM
Posted 04 April 2013 - 07:17 PM
Posted 04 April 2013 - 08:03 PM
Posted 04 April 2013 - 08:18 PM
Posted 04 April 2013 - 10:45 PM
... My wires are bundled together inside of a large wire loom along with the power wire to the scope. ...
I assume your power system is all battery powered or it's through an AC-DC power adapter? If latter, what's the power adapter's make/model?
In general, best practice would be separating small signal/delicate devices power feed from other heavy duty/noisy power guzzlers (mount motor, dew heater, fan, and if possible, Peltier Cooler.)
The fact of life is when a high-gain amplification is at work, any interference, power supply ripple, RF interference (e.g., cellphone) etc. also got amplified as well.
Posted 05 April 2013 - 07:27 AM
BTW, what make/model is the video monitor? Very low end ones may have cheap DC-restoration circuit which the artifact may show.
A screenshot on the "wavy line" would be helpful, since NTSC (and PAL) has a few well-known undesirable effects if signal/timing is not perfect.
Posted 05 April 2013 - 08:01 AM
Posted 18 August 2014 - 03:05 PM
I have checked all my cables and am using grounded AC power. After I had my camera serviced, I got this wavy interference pattern. What are the issues in the camera that can cause this. It's not power interference or cables.
Posted 18 August 2014 - 06:03 PM
I've never seen a failure of any of the components in a camera causing this sensitivity to interference ... but it is possible. I'd setup as clean a configuration as possible to prove a problem with the camera so you can go back to who did the service with something concrete if you want to go that route.
When you get interference and it's not from an obvious source (you've replaced the cables and tried different power sources) it can sometimes be caused by low voltage to the camera. Low voltage seems to cause some strange things on the camera. I'd try different power sources and vary the voltage from exactly 12 to something in the 14v range (fully charged battery) to see if that makes any difference.
Posted 19 August 2014 - 12:08 AM
If you have a 12V battery try powering the MC with that to see if the noise goes away. Batteries have the cleanest power.
Posted 21 August 2014 - 09:10 AM
Okay, call me an idiot. It was the power supply. Rock says video is sooo sensitive in this regard.
Posted 21 August 2014 - 09:20 AM
Glad it was an easy fix.
You can see why it's so helpful to have some redundant gear when you are troubleshooting strange video problems.
It's not uncommon that after having a camera serviced that we become quite a bit more critical and often look more carefully at it's operation ... so I could easily see that sometimes we'd "find" stuff that's actually been there all the time.
Rock produces most of his cameras from very high quality components but the included 12v power supplies while effective and inexpensive are not produced to the same standards (and it wouldn't make sense to do so) ... so I guess the occasional failure is to be expected.
Edited by mclewis1, 21 August 2014 - 09:22 AM.
Posted 21 August 2014 - 10:24 AM
Thanks Mike. I also use video smoothing in Miloslick which helps remove that last bit of interference. You just have to remember to turn it off before switching to a different frame grabber.
Posted 22 August 2014 - 12:46 PM
I've always used the Costco bought power tank/car starter battery to power my Mallincam. I use the noisy 120 VAC to 12 VDC power supply for everything else.