Chuck Branscomb wrote:
Speaking of the timer problems, are these issues primarily communications related? (i.e. issues with the remote start location not having sufficient/consistent signal strength back to the base)
The "original" issue earlier in the day was that the transmitter was not raised high enough. At long distances, The Tx and Rx are EXTREMELY sensitive to height. I assume that it needs a "wide" path with no ground obstruction to work well. The advertised range is 1 mile line of sight, but I think this would be on top of a big pole. At the 1/2 mile or so range we were running with sanford, plus a little "crown" of the land, the Tx has to be at least 8' high. 12' would be even better and probably eliminate some missed signals.
So after raising it higher, there were still some missed starts (maybe 1 in 50?), and I recommended we run 250' or so of wire to get the transmitter closer to the bus. When we did that, I guess the signals got even worse!! Debugging at the transmitter showed that where the (worn) plug on the long wire actually connects into the box, there was an intermittent contact. Bending the pins and pulling the plug half-out fixed that problem.
So it is a connector problem. It's probably time for the club to order all new connectors for our timer cables and replace every one of them.
So crash course for setting up the wireless over long distances:
- Higher the better on both the Tx and Rx!
- Try to not have cars "parked" right under/next to/in the line of sight, especially near the transmitter.
- If signal strength is weak (there is a 4 "bar" indicator on the receiver), run as much cable from the remote start/finish to the transmitter to decrease the wireless gap.
Obviously at places like Laurinburg where we're just using it for convenience at a short distance, it has been nearly flawless.
_________________
Mike Whitney
whit32@gmail.com, 919-454-5445
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