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Checking Antenna Spectra

This is typically performed in either swlevel 2 or swlevel 3, with the methodology differing between the modes. This is a sample of commands used while in swlevel 3, 

user1@lcu$ # Initialisation
user1@lcu$ swlevel 3
user1@lcu$ rspctl --bitmode=8
user1@lcu$ 
user1@lcu$ # Beamforming the zenith to use RCUs
user1@lcu$ # LBA mode 3
user1@lcu$ beamctl --antennaset=LBA_OUTER --band=10_90 --rcus=0:191 --subbands=0:487 --beamlets=0:487 --anadir=0,0.7853982,AZELGEO --digdir=0,0.7853982,AZELGEO
user1@lcu$ # HBA mode 5
user1@lcu$ beamctl --antennaset=HBA_JOINED --band=110_190 --rcus=0:191 --subbands=0:487 --beamlets=0:487 --anadir=0,0.7853982,AZELGEO --digdir=0,0.7853982,AZELGEO
user1@lcu$ # HBA mode 7
user1@lcu$ beamctl --antennaset=HBA_JOINED --band=210_250 --rcus=0:191 --subbands=0:487 --beamlets=0:487 --anadir=0,0.7853982,AZELGEO --digdir=0,0.7853982,AZELGEO
user1@lcu$ 
user1@lcu$ # Shutdown
user1@lcu$ swlevel 0

After initialisation, rspctl --stati --select rcuN:rcuM,rcuA:rcuB can be run in a separate shell (or the same shell if the beamctl commands are run in the background) and will plot the SST data for visual inspection, for a given range of RCUs. Using the beamctl method, RCUs not provided to a beam are not plotted by default.

If an antenna spectrum is looking suspicious, the RCUs used for the beamctl commands can be used to limit the range of antennas to make it easier to try down the misbehaving antenna.

 

swlevel 2 method, courtesy of Pearse Murphy,

user1@lcu$ # Initialisation
user1@lcu$ swlevel 2
user1@lcu$ 
user1@lcu$ # RCU Warming, LBA, HBALo, HBAHi
user1@lcu$ rspctl --mode=3
user1@lcu$ rspctl --mode=5
user1@lcu$ rspctl --mode=7
user1@lcu$ 
user1@lcu$ # Shutdown
user1@lcu$ swlevel 0
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