! file bc044-22cm.set ! 17aug95 - received from jconway (4MHz shift, flukeb fixed) ! ! Center Frequency of VLA HI absorption is at 1344.44 MHz ! consistent with the optical redshift pf 0.0565 ! So lower band edge as at a frequency 4MHz lower, assuming ! a 8HMz channel. ! ! Ignore seasonal shifts in center frequency, maximum ! effect is 60km/s out of total BW coverage of 1800km/s. ! nchan = 2 samprate = 16.0 bits = 2 bbfilter = 8.0 ! 64 Mbps tpmode = 2 format = VLBA1:4 tpspeed = 133.33 ! pcal = 'off' bbc = 1, 2 netside = U, U ifchan = R, L freqoff = -4.00,-4.00 freqref = 1344.44 ! firstlo = 2100.00 fe(1) = '20cm' fe(3) = '20cm' synth(2) = 2.1 station = VLBA rchan = A lchan = C / ! ! VLA tweaking ! ! Place lower edge of 12.5MHz filter at DC input to 600MHz ! upconverter, i.e. want DC to upconverter to correspond to ! sky frequency of 1344.440 - 6.250 = 1338.190 MHz, round ! up ( so both flukea and flukeb can be multiples of 10kHz) ! make F_{VLA} = 1338.200 ! flukeset = 0 ! Let operators decide ! vlafeab = -3.2 ! F1 vlafecd = -3.2 vlasyna = 3510.1 ! F6 vlasynb = 3510.1 flukea = 128.10 ! Flukes flukeb = 228.10 ! vlaif = 'SYSLIF' vlarot = 'VLBLROT' ! ! Firstlo is just F_{VLA} -600 ! firstlo = 738.200 ! station = VLA1 rchan = B lchan = D / station = VLA27 rchan = A lchan = C /