Table of contents
- 1. 2012 February 1st
- 1.1.1.1. 1) 1st LBA Test:
- 1.1.1.2. 2) HBA Modem and Oscillation Test
- 1.1.1.3. 3) 2nd LBA test
- 2. 2012 February 2nd
2012 February 1st
A. Horneffer did:
1) 1st LBA Test:
Did the "standard" test with rspctl --stati, the following antennas had reduced power: 104, 138, 148, 150
104 switched a number of times between power levels I consider "normal" and "LNA not powered".
148 showed changing power levels.
2) HBA Modem and Oscillation Test
The modems 68/68-7 and 40/41-11 are broken
The modem 166/167-12 reports back "???" in the first test of modemtest.
At the beginning tile 178/179 was oscillating with high power (like Joris has reported), that also transmitted to tile 180/181. After switching off all LNAs of tile 178/179 (with "rspctl --hbadelays=2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2") the strong osciallations were gone and stayed gone after switching the LNAs back on.
A noise line at about 156 MHz was present in tile 178/179, and weakly visible in tiles 176/177 and 180/181. After switching off LNA 178/179-16 that line is gone, also in the neighboring tiles. So that FE module is bad, it may also be the cause for the strong oscillations.
3) 2nd LBA test
Did the "standard" test (ca. 4 h after the first), the following antennas had reduced power some with changing power levels: 68, 72, 78, 104, 130, 138, 148, 150, 152, 178
2012 February 2nd
James M Anderson
While testing the beam calibration performance for RCUMODEs 3, 5, and 7, I used rspctl --stati to make plots of the overall spectrum, showing major locations of RFI. This was done at approximately 11:30 local time. The DAB+ situation is getting worse.
RCUMODE 3
RCUMODE 5
RCUMODE7
