TGBT15A_915_71 - VPM Raw Mode Testing
Test VPM Raw mode by looking at bright pulsar B1937+21
Start around 1:15pm
Select L-band to be in focus
Telescope still undergoing maintenance
As noted by Justin, the CLEO VEGAS display has to be restarted after a version change. This is unusual behavior, and could easily catch people out, as most of it looks like it is working.
Through device explorer, set next scan number, and source name to be Test_B1937.
Attempt to validate the script. Get an error that the data rate is too high. Increase the tint by a factor of 16.
Try to run, but get a warning that numchan and nchan are not equal, and an error that subband is not 1.
Edit the script to fix this, now seems to execute ok.
Still no control of telescope - but it may be moving manually.
Scan 1 - VPMRawModeTest_B1937
IF Manager gives a warning that VEGAS J9 through J16 has no IF signal.
Scan 2 - repeat
Scan 3/4 - try one invocation of CheckMode1_rmp, to see if it recovers from being in Pulsar Mode.
Runs with no errors, but GBTIDL will not display it! Maybe because we were still at X-band? Switch to L-band.
Scans 5/6 - now looks all ok (lots of RFI).
Antenna is now enabled.
Scan 7 - VPMRawModeTest_B1937
All eight banks are in subsystem_select, but only Bank A should be.
input power level on VEGAS CLEO screen is blue (normal) for Bank A, but orange for the others. I have never seen this before.
The power levels into the other banks are still reasonable.
sw_period is 6.82666 e-07, but VEGAS does not display the "e-07", so it looks like 6.8 seconds.
Repeat - scans 8 and 9
Stop after scan 9 and switch to pointing for a while
This topic: CICADA
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