IMPORTANT: 1MHz continuum observations can be done with either: ca_2048_2048_2f or ca_2048_2048_2f_zm16 . If CABB is in the ca_2048_2048_2f_zm16 config do NOT reprogram for 1MHz (non-zoom) continuum observations.
To change modes it is necessary to:
stop the current scan
check the cccversion
To check the cccversion: caccc> cccversion. It should be “newzmsy” for all modes except VLBI and “VLBItwommlos” for VLBI observing.
in cacor, open the edit menu
select the edit button in the cacor gui,
select the continuum config
edit> get ca_2048_2048_2f
and program the correlator
edit> prog
Check that all blocks program correctly. If any blocks report an error, they need to be programmed again, e.g.:
edit> prog 8 or edit> prog 8 27
<CR> to return out of the edit menu
Calband should be “f f” as this happens automatically whenever you exit from the edit menu. This is what you need for this config, but you can check with:
cacor> calband
start observing a calibrator, e.g.
caobs> track 1
Check for rear transition module (rtm) problems
F1 and F2 Datalinks (separate tabs in the CACOR gui) should not have red error messages, and the 1ms values are in the range 2000 - 13000 (i.e. not 260 000). Fix with:
cacor> rtminit
Check (in spd) for “big humps”
F1 and F2 datalinks list the antennas, frequencies (1 or 2) and pols (A or B) and the block associated with that ant/freq/pol. Reprogram that block to fix big humps.
Check (in spd) individual baseline amplitudes and phases for discontinuities and fix by reprogramming relevant blocks
Setup standard flagging
cacor> fflag f1 birdies
cacor> fflag f2 birdies
NOTE: all flagging is cleared every time you exit from the edit menu
Check that tvch is set to appropriate values
Check that delavg is set to an appropriate value
Standard setup follows (i.e. check sampler levels, and for fringes, then dcal, acal, pcal etc.)