Karl Schwenz, Chris Golubieski, Gordon Maclean
GoalsObjectives:
- Diagnose and fix reason that system has been offline for last few days (no data in Boulder after April 27).
- Replace data system box in order to take the old box back back to Boulder for checkouta tuneup.
- Replace top TRHs which have not been working well. Add new radiation shields.
- Replace barometer with external unit.
- Make anti-climb door easier to latch.
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Chris climbed tower and replaced the TRH transducer/PIC units, and replaced the radiation shields with picnic plates 
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height | previous | new |
|---|---|---|
2m | TRH012 | no change |
7m | TRH011 | TRH009 |
16m | TRH015 | TRH004 |
30m | TRH013 | TRH001 |
43m | TRH016 | TRH006 |
Replaced the barometer. New unit is B1 with chassis outside of the DSM. Old was B9, inside the DSM.
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Karl fixed the anti-climb door. Works like a breeze now. If door is ever difficult to latch give a hand knock on the bottom right corner to shift it to the left. Hinge bolts should be replaced with correct size on a future visit.
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Site note: There is a strong smell of what I believe is butanol in the seatainer where the turbulence tower fibers are terminated. This is the first seatainer as one drives into the site. There are several butanol bottles in that seatainer.
The manual for the fiber/copper network converters (Transition Networks, model E-100BTX-FX-05) describes the dip switch options. I've cut and pasted some of the manual to the end of this entry. It seems that we should disable the link pass-through and far-end fault options on both converters. Link pass-through and far-end fault options can cause a copper interface to be disabled if a fault is detected on the remote copper interface or on the fiber. These options appear to be for a building network with good network monitoring equipment. Perhaps a power outage, cable disconnect, or powering down a network switch could cause the converters to think there is a fault in the copper lineethernet or the fiber, and then the copper interfaces would be disabled. The manual says nothing about whether the interfaces are automatically brought up if the fault disappears.
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Pause Control The Pause feature can improve network performance by allowing one end of the link to signal the other to discontinue frame transmission for a set period of time to relieve buffer congestion. NOTE: If the Pause feature is present on ALL network devices attached to the media converter(s), enable the Pause feature on the media converter(s). Otherwise, disable the Pause feature Link Pass-Through The Link Pass-Through feature allows the media converter to monitor both the fiber and copper RX (receive) ports for loss of signal. In the event of a loss of an RX signal (1), the media converter will automatically disable the TX (transmit) signal (2), thus, “passing through” the link loss (3). The far-end device is automatically notified of the link loss (4), which prevents the loss of valuable data unknowingly transmitted over an invalid link. near-end <-1-> local media -2-> remote media <-3-> far end device converter <-4- converter device original fault local media cvtr remote disables on copper link sends loss signal ethernet device (1) over fiber (2) (3) Far-End Fault When a fault occurs on an incoming fiber link (1), the media converter transmits a Far-End Fault signal on the outgoing fiber link (2). In addition the Far-End Fault signal also activates the Link Pass-Through, which, in turn, disables the link on the copper portion of the network (3) and (4). original fault on fiber (1) near-end <-4-> media -1-> media converter <-3-> far end device converter <-2- converter device A B media converter media converter B A disables copper detects fault on (1), link (4) disables the copper (3) sends far-end fault signal to A over fiber (2) |