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Alexa on Rig powered 24V flashing Error....


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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!

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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

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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.

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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.

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