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Message ID: 450     Entry time: Tue Oct 1 19:41:23 2024
Author: Shane 
Type: Update 
Category: CDS 
Subject: CyMAC Timing Chassis Issue 
[Shane, Luis] Summary of the issue we've been having with the timing chassis: when we connect only the Valon 5015 to power, the timing signal comes out of it sinusoidal as expected and the status lights are steady and all looks good. As soon as we connect the 3010 to power, the signal (both coming out of the 5015 and coming out of the 3010) go flat and the status lights of the 5015 start to flicker. We think what may be going on is that the 5015 is drawing just enough power to survive on its own, but when the current gets split to go to the 3010 as well, the 5015 takes more than it needs and becomes overpowered, and thus no longer outputs anything. We want to test further by powering them with two separate power supplies, but we need another one of the power connectors for the 3010 (the only one we have branches out from the connector to the 5015 and we don't want to cut any of the wires). Images of the inside of the chassis, along with two roughly sketched circuit diagrams (one showing the current setup, in which they're powered by the same source, and one showing a possible test set up, in which they're powered separately.
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