
Log for Jan 10, 2010 (all times local (MT))
Steve Ellingson


MCS-DR BIOS set to boot as soon as power is applied after a power failure.
k1 & k2 also set to do this.

Now able to ssh into the s60 PCs, k1 & k2.

Set gateway and DNS addresses so that k1 & k2 can access NTP.  Set both to "automatically update time from internet" but after multiple reboots seems they are still different by about 45 seconds.

Subnet mask: 255.255.255.0
Gateway:     146.88.201.100
DNS:         146.88.201.8


Checking out backend & total system gains (100110b_k1 and _k2)
--------------------------------------------------------------

DS345 injecting into [G] (ARX distro input).  So, k1, k2, and FSH3 all see same output with only small differences to splitter path differences.  From previous measurements, we know that loss through ARX distro is about 16 dB.
-- DS345 sine 1.775 MHz, 4 Vpp
-- -- FSH reads +0.66 dBm
-- -- s60s tuning Ch0; I/Q ~ +/-55 codes (i.e., nearly full scale)
-- -- no evidence of glitching on k1 or k2
-- -- k1: 1a.dat, .txt (1000 packets); 1b.dat (300,000 packets)
-- -- k2: 2a.dat, .txt (1000 packets); 2b.dat (300,000 packets) 
-- DS345 noise, 4 Vpp
-- -- FSH reads about -25 dBm for RBW = 100 kHz 
-- -- s60s tuning Ch0; I/Q ~ +/-50 codes peak 
-- -- k1: 1c.dat, .txt (1000 packets); 1d.dat (300,000 packets)
-- -- k2: not done.

Now various ARX outputs injecting into [G] (ARX distro input); i.e. actual system configuration.  Note in all cases FSH reads about -27.5 dBm for RBW = 1 MHz @ 38 MHz, so system gains are very similar (makes since since cable lengths are very close).  Also, s60s tuning Ch10 ("A"); I/Q ~ +/-15 codes peak; and output looks reasonable
-- Balun Board 2, Transformer output 3 (Stand 214 E-W)
-- -- k1: 1e.dat, .txt (1000 packets); 1f.dat (300,000 packets)
-- -- k2:                              2f.dat (300,000 packets)
-- Balun Board 4, Transformer output 1 (Stand 191 E-W) 
-- -- k1: 1g.dat, .txt (1000 packets); 1h.dat (300,000 packets)
-- -- k2: not done.
-- Balun Board 4, Transformer output 4 (Stand 228 E-W) 
-- -- k1: 1i.dat, .txt (1000 packets); 1j.dat (300,000 packets)
-- -- k2: not done.
-- Balun Board 1, Transformer output 4 (Stand 189 E-W) 
-- -- k1: 1k.dat, .txt (1000 packets); 1l.dat (300,000 packets)
-- -- k2: not done.


Deep integration (100110c_k1 and _k2)
-------------------------------------

Using output on Balun Board 2, Transformer output 3 (Stand 214 E-W).  
Test grabs 300,000 packet at a time (~420MB/file), one after another.
-- Note, however, small time gap between files (not exactly contiguous)
Starting about 12:30pm local time.
k1's S60 tuned to Ch 10 ("A") (1dB~range: 35.00-38.50 MHz)
k2's S60 tuned to Ch  9       (1dB~range: 31.50-35.00 MHz)


4-dipole beamformer construction
--------------------------------

Beamformer delays each of 4 available outputs using SRS DB64 delay line boxes, then sums them.  Summed output goes to ARX distro input [G].  Looking at S60 output after integration of beamformer, level has dropped only very slightly (peak values maybe +/-10 as opposed to +/-15); apparently gain from summing dipoles approximately cancels insertion loss of beamformer.

Delay settings for zenith beam (using longest cable as zero additional delay):
(used delay values from RPD0026, linearly extrapolated to 38 MHz)
Stand 189 E-W actual delay should be 35.58 ns; set to 35.5 ns
Stand 191 E-W actual delay should be 17.08 ns; set to 17.0 ns
Stand 214 E-W actual delay should be 18.86 ns; set to 19.0 ns
Stand 228 E-W actual delay should be  0    ns; set to  0.0 ns


Overnight run on zenith beam ("110110o")
----------------------------------------

Using beamformer described above.
Same output configuration, used bash script to do a 10,000-packet acquisition every 15 minutes.  Named sequentially (1, 2, 3, etc.).
-- k1 is connected to S60 tuned to Ch 10 ("A"; 35.00-38.50 MHz)
-- k2 is connected to S60 tuned to Ch  9 ("9"; 31.50-35.00 MHz)
-- bash script is lwa4.sh; calls server_10k.py
-- Note clocks on both PCs are are not set properly and do not agree with each other, although times given below are believed correct.
-- -- First acquisition on k1 was about 1/10 2:10pm local time.
-- -- First acquisition on k2 was about 1/10 2:40pm local time.
-- k1 output in folder 100110o_k1
-- k2 output in folder 100110o_k2

Also, logged in remotely and did a single 300,000-packet (~1 minute continuous) integration at about 3:10am.  This is included in the above folders.


