Keywords: pdbi-trouble

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# Trouble Shooting Receipes

In many of these cases, the WHY command may be sufficient to pinpoint the error. WHY is not allmighty, however, and a good understanding of the common mistakes and failures help.

Subsections

- Nothing Happens
- Antenna won't move
- Antenna does not reach source, but keeps trying
- Scan does not start
- Crazy calibration results
- No single-dish continuum data
- No single-dish spectral lines
- Multi-dish continuum OK, but no fringes at all on XAFF
- Multi-dish continuum OK, but no fringes on one antenna on XAFF
- Unusually high Tsys on one antenna
- Lower intensity on some baselines on XAFF display
- Intensity jump on two baselines
- Fringes suddenly disappear
- Correlator subband not working on one antenna
- Other funny problem
- Other not funny problem