Blog from March, 2010

TRH at 30m bad data

The TRH at 30m is acting up. Here is the data when it goes bad:

data_dump -i 1,420 -A manitou_20100314_120000.dat | more

2010 03 14 13:17:07.8073 0.82 31 TRH013 -4.18 88.21 3565 2887\r\n
2010 03 14 13:17:08.6281 0.8208 31 TRH013 -4.17 88.21 3566 2887\r\n
2010 03 14 13:17:09.4474 0.8194 31 TRH013 -4.19 88.21 3564 2887\r\n
2010 03 14 13:17:10.2680 0.8206 31 TRH013 -4.17 88.21 3566 2887\r\n
2010 03 14 13:17:11.0874 0.8194 31 TRH013 -4.17 88.19 3566 2886\r\n
2010 03 14 13:17:11.6405 0.5531 32 TRH013 560.79 -10099.38 -1 -1\r\n
2010 03 14 13:17:12.1912 0.5508 33 TRH013 560.79 -860.91 -1 29695\r\n
2010 03 14 13:17:12.7506 0.5594 33 TRH013 560.79 -728.27 -1 28671\r\n
2010 03 14 13:17:13.3080 0.5573 33 TRH013 560.79 -602.91 -1 27647\r\n
2010 03 14 13:17:13.8614 0.5534 33 TRH013 560.79 -602.91 -1 27647\r\n
2010 03 14 13:17:14.4180 0.5565 33 TRH013 560.79 -484.86 -1 26623\r\n

And when it comes back:

2010 03 14 13:25:23.2688 0.5591 33 TRH013 560.79 -374.10 -1 25599\r\n
2010 03 14 13:25:23.8211 0.5522 33 TRH013 560.79 -484.86 -1 26623\r\n
2010 03 14 13:25:24.3795 0.5584 33 TRH013 560.79 -602.91 -1 27647\r\n
2010 03 14 13:25:24.9310 0.5516 33 TRH013 560.79 -602.91 -1 27647\r\n
2010 03 14 13:25:25.6989 0.7679 35 TRH013 -4.18 -1418.74 3565 27647\r\n
2010 03 14 13:25:26.5223 0.8234 31 TRH013 -4.17 88.04 3566 2880\r\n
2010 03 14 13:25:27.3417 0.8193 31 TRH013 -4.17 88.06 3566 2881\r\n
2010 03 14 13:25:28.1604 0.8188 31 TRH013 -4.17 88.04 3566 2880\r\n

Note that the delta-Ts when it is working correctly are around 0.82 secs and when it goes
nuts are around 0.55 sec. Steve thinks it may be a PIC processor issue.

Ned Patton, Sylvain Dupont, Gordon Maclean
March 12, 2010, 9:15 MST arrived at tower

Plan: correct problem of spotty CNR1 data, replace TRH fan at 2 meters

rserial on port 19 showed no CNR1 data. Power cycled CNR1 by
unplugging/replugging. No data.

Switched CNR1 cable to port 5 (2 meter TRH's port). CNR1 works on that port.

Changed config to use unused port 14 as the CNR1 port. CNR1 also works
on that port.

Power on port 19 looked OK, and TRH worked on that port.

9:27 MST: new fan in 2 meter TRH.

Ned determined that the 7 meter TRH fan was noisy, so we replaced
that too.

System voltage, as measured by the DVM in the serial test box, fluctuates
from 11.8 to 13.2 volts, with a period of something like 10 seconds.
I assume that is due to the trickle charger.

At one point I saw the CNR1 data pause for about 20 seconds, and then
several records came out at once. That was after it had been running
for a while - not at startup.

Off tower at 10:30. Left site after a tour up the walkup tower and
chem seatainer.