Premium Members Osvaldo Silvera SOC Posted April 30, 2014 Author Premium Members Report Share Posted April 30, 2014 Just tested and confirmed continuity between aux D tap negative side and camera plates positive terminal only when in 24volt mode.. Quote Link to comment Share on other sites More sharing options...
Premium Members Mike Germond SOC Posted April 30, 2014 Premium Members Report Share Posted April 30, 2014 I had a similar Alexa problem on my PRO2 electronics base. One of the breakers on the sled was dirty, so the 24v series wasn't being made. The camera was reading 13.xV from one battery and a minuscule flash of voltage from some mystery battery. It turned out the Teradeck Bolt's internal battery was back feeding and "trying" to power the Alexa. Exercising the breaker brought it back and I quickly realized the situation with the DTap on the battery plates. I stay away from the AUX plate when in 24v mode knowing that it comes 2nd in the series. Stick with the CAM or MON plate! 1 Quote Link to comment Share on other sites More sharing options...
Premium Members John atkinson Posted May 2, 2014 Premium Members Report Share Posted May 2, 2014 Alexas do not like a lot of accessories plugged during boot up. Used to have this problem when I got our first Alexa. Power accessories from a P tap sandwich plate and use side ports for start stop. You will never have that problem again. JA Quote Link to comment Share on other sites More sharing options...
Premium Members William Demeritt Posted May 2, 2014 Premium Members Report Share Posted May 2, 2014 We did some testing yesterday and discovered something strange that we were able to duplicate numerous times. More testing is needed, and we're going to share what we found with Jack, but in the mean time, I'd make this suggestion to PRO CineLive owners: If you have the CineLive upper and lower junctions, and you're powering a 24v camera (Arri Alexa, etc), I advise you do not use the AUX PTAP on the right side of the CineLive lower junction, or the PTAP on the AUX battery, to power any video equipment that also receives a signal over HD-SDI. So, simply put: if powering a 24v camera, we recommend you don't use the AUX battery PTAP (on CineLive Lower Junction OR AUX battery position) to power video accessories (Teradek Bolt, Hyperdeck Shuttle 2, etc). CAM PTAP is fine. The moral: don't power 12v HD video accessories off AUX PTAP's if you're powering the camera in 24v mode. Quote Link to comment Share on other sites More sharing options...
Premium Members Thomas English Posted May 2, 2014 Premium Members Report Share Posted May 2, 2014 The Alexa side symptons I have seen before when the 12v battery of the 24v series of batteries (i.e. the CAM one rather than the AUX on as per the PRO) runs out, fails or has too much draw. Quote Link to comment Share on other sites More sharing options...
Premium Members James Baldanza SOC Posted May 2, 2014 Premium Members Report Share Posted May 2, 2014 What about the PTAP that is built into the battery "Chinese battery" on the AUX battery? Quote Link to comment Share on other sites More sharing options...
Premium Members William Demeritt Posted May 2, 2014 Premium Members Report Share Posted May 2, 2014 What about the PTAP that is built into the battery "Chinese battery" on the AUX battery? I have a feeling that depends on how the chinese batteries are wired: if the PTAP gets + and - off of the same wiring line as the terminals that connect to the AB plate, then you'll likely have the same problem? Worth testing, and we didn't have any of those batteries with us when we were testing it. Quote Link to comment Share on other sites More sharing options...
Premium Members John atkinson Posted May 3, 2014 Premium Members Report Share Posted May 3, 2014 When using the P tap on the Chinese batteries, just remember to plug everything in before powering up the system. Otherwise you will create a ground loop and possibly zap what you are plugging in. JA Quote Link to comment Share on other sites More sharing options...
Premium Members Ken Nguyen Posted May 3, 2014 Premium Members Report Share Posted May 3, 2014 A blocking diode will help eliminate this problem. Cheers, Ken Nguyen. Quote Link to comment Share on other sites More sharing options...
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