Ok so here's my question. I'm fairly new to electronics research, my background is chemical engineering, but I'm attempting to improve my understanding of basic circuits and data transmission for my work. For this issue; I have a problem, and a solution, and I'm trying to work backwards to figure out why that solution solves that problem.
What I'm working with is a device that's transmitting data. DC voltage is supplied to a device, the device then attenuates the DC voltage to create a modulated current which is sent back to a computer and interpreted as a digital information signal. An issue was occurring where a new version of these devices would not transmit any data all. The way it was explained to me was that the new versions were not drawing as much current as anticipated so the modulated current being sent back was not high enough to be interpreted as a logical 1, so the computer was essentially receiving all 0's.
I don't have specifics about the circuitry of the end device, nor any diagrams or anything like that, but I have the solution. To solve this problem one standard ~10,000 ohm resistor was installed, that's it. Again I don't know exactly where or how. I want to know how this could work.
My only theory that makes sense to me is that this resistor must have been installed in parallel to the circuit, reducing overall resistance and allowing enough current to flow that the computer could distinguish the incoming modulated current between logical 1's and 0's. Does this sound on track at all?? I'm sorry if this was confusing, but it's a bit of a puzzle and I'm very curious to see if my theory is correct and to learn a bit more about electronics. Thank you. Ask questions if you have any.