September 16, 2005
Project TRXRDN050916

Setup using ACS and Q-band frontend to investigate baselines.  Tuned
to 43GHz c.f.  Detecting all four channels, redundant CM, SF, and ACS
sampler.  ACS in 800MHz, 4-bank, 2 sampler/bank mode.  Setup saved in
GBTGUI file qband_acs_800.cfg.

Have been looking at data using ac2.g.  Use s.plotTaEaPair() on each
redundant pair, plotting baselines of 5 pairs at a time X 2 samplers
on the same plot.  Here are the related glish commands:

tit:='L1 via CM1/SF1/ACSJ1 & CM2/SF2/ACSJ3'
s.plotTaEaPair(proj,slist,drop=15,offset=0.001,bank=1,rcvr=1,rec_num=1:12,title=tit)  
s.pg.setyscale(-.001,.008)
s.plotTaEaPair(proj,slist,drop=15,offset=0.001,bank=2,rcvr=1,rec_num=1:12,newplot=F,dc=0.004)

tit:='R1 via CM5/SF5/ACSJ2 & CM6/SF6/ACSJ4'
s.plotTaEaPair(proj,slist,drop=15,offset=0.001,bank=1,rcvr=2,rec_num=1:12,title=tit)
s.pg.setyscale(-.001,.008)
s.plotTaEaPair(proj,slist,drop=15,offset=0.001,bank=2,rcvr=2,rec_num=1:12,newplot=F,dc=0.004)

tit:='L2 via CM11/SF3/ACSJ5 & CM12/SF4/ACSJ7' 
s.plotTaEaPair(proj,slist,drop=15,offset=0.001,bank=3,rcvr=1,rec_num=1:12,title=tit) 
s.pg.setyscale(-.001,.008)
s.plotTaEaPair(proj,slist,drop=15,offset=0.001,bank=4,rcvr=1,rec_num=1:12,newplot=F,dc=0.004) 

tit:='R2 via CM15/SF7/ACSJ6 & CM16/SF8/ACSJ8'
s.plotTaEaPair(proj,slist,drop=15,offset=0.001,bank=3,rcvr=2,rec_num=1:12,title=tit)
s.pg.setyscale(-.001,.008)
s.plotTaEaPair(proj,slist,drop=15,offset=0.001,bank=4,rcvr=2,rec_num=1:12,newplot=F,dc=0.004) 


Found bad lags:

Scan 4: Bank 2, Rcvr 2, Phase 2, Int 6
Scan 30: Bank 2, Rcvr 1, Phase 2, Int 5
Scan 41: Bank 2, Rcvr 1, Phase 1, Int 3
Scan 58: Bank 2, Rcvr 1, Phase 2, Int 10.


Found Ripple in both banks:

Scans 16-18: (L2) Banks 3&4, Rcvr 1. (~8MHz)

Scans 36-38: (L2) Banks 3&4, Rcvr 1, (~7MHz)

Scans 44-45: (L2) Banks 3&4, Rcvr 1, (~8MHz)