
Log for Jan 8, 2010 (all times local (MT))
Steve Ellingson

System Information
------------------
(Reference plane in square brackets, always indicates at input)
 
Signal path fully installed:
-- Stand 112 EW polarization and associated FEE channel
-- [A] Production/installed cable to SEP
-- [B] 6ft N-SMA LMR240 cable to ASP rack
-- [C] 1ft light brown SMA-MMCX(?) cable to ARX board
-- [D] ARX board (Input port labeled "3B", ARX Channel 5 of 16)
-- [E] 7ft(?) CAT5/RJ45 cable from ARX board to balun board
-- [F] 4-channel balun board #1(?) of 4, channel associated with "T2"
-- goes to "ARX output distro"; see below.

Added to ASP rack:
-- ARX output distro:
-- -- [G] SMA-SMA cable from ARX 4-channel balun board (see below)
-- -- [H] 6 dB pad
-- -- [I] 4-way 0deg splitter (MCS ZMSC-4-1)
-- -- [J] 3 dB pad on each output of splitter
-- -- The splitter outputs go to:
-- -- -- (1) [K1] SMA-SMA cable
             (terminated into [L1] SLP-50+ attached to [M1] S60 #1)
-- -- -- (2) [K2] SMA-SMA cable
             (terminated into [L2] SLP-50+ attached to [M2] S60 #2)
-- -- -- (3) [K3] SMA-SMA cable 
             (added [L3] another cable, sent to [M3] spectrum analyzer)
-- -- -- (4) [K4] SMA-SMA cable 
             (terminated into matched load)
-- Rack tray with 2 S60s.  ARX output distro sits between them.
-- Rack tray with 2 Mini-ITX PCs, used for S60 acquisition.
-- -- Connected to S60s with CAT5 ethernet cables
-- -- Only one ("k1") was made operational for today's effort

ARX configuration:
-- Minimum bandwidth configuration; approx. 30-55 MHz.
-- AT1, AT2 set to 0 dB; i.e., ARX channel at minimum attenuation
-- Above configuration results in S60 maximum output codes of about
   +/-20 (compared to +/-63 for clipping) for I and Q outputs

Measurements:
-------------

NOTE: These measurements done approximately 1400 local time.  (Time in file timestamps probably not correct)

Spectrum at [M3] (~ ARX output) using spectrum analyzer
Full span, to 6 GHz.
No data recorded, but looked good (no spurious noted)

Integrated spectrum at [M3] (~ ARX output) using spectrum analyzer
RBW=100 kHz
1.rss, 1.csv, 1.png

Same, changed RBW to 1 MHz
2.rss, 2.csv, 2.png

S12 of additional LMR240 cable used as part of measurement of in-system long cable.
This cable henceforce called AuxCable1.
AuxCable1.rss, AuxCable1.csv, AuxCable1.png

S12 of: 
-- AuxCable1
-- [A]-[C] (RPD cable, SEP, 6' N-SMA cable)
-- AuxCable2 (see below)
3.rss, 3.csv, 3.png

S12 of AuxCable2, a short N-SMA cable used in above test.
4.rss, 4.csv, 4.png

s60 acquisition, set to channel 10 (35.00-38.50 MHz), 1000 packets
1_short.dat (1.4 MB), .txt

Same, 100,000 packets (~20 seconds of acquisition)
test_1_100000.dat (140 MB), .txt

Same, 1,000,000 packets (few minutes of acquisition)
test_1_1000000.dat (1.4 GB)

s60 acquisition, set to channel 11, 100,000 packets
test_1_Ch11_1000000.dat (140 MB), .txt

s60 acquisition, 1,000 packets each (1.4 MB each for .dat files)
Ch 11: test_1_Ch11.dat, .txt
Ch 12: test_1_Ch12.dat, .txt
Ch 13: test_1_Ch13.dat, .txt
Ch 14: test_1_Ch14.dat, .txt
Ch 15: test_1_Ch15.dat, .txt
Ch  8: test_1_Ch08.dat, .txt
Ch  9: test_1_Ch09.dat, .txt
Ch 10: test_1_Ch10.dat, .txt

Overnight run
-------------

Same output configuration, used bash script to do a 1000-packet acquisition every 15 minutes.  Named sequentially (1, 2, 3, etc.)  First acquisition would have been about 1600 local time.
-- bash script is lwa2.sh; calls server_short.py
-- Output in folder 100108o_data



