OldPointingAbcd - www.iram.es Main Wiki

Continuum instability ("ripple") can occur with all receivers, making pointing and focusing difficult.
In general some receivers are better than others in this respect as summarized here:
- A100 generally OK for pointing. (2003-11-12)
- B100 OK, is best for pointing. B100 is the standard reference for the heterodyne pointing model
- $/!\$ C150 often bad for pointing, ripple. (2002-07-16)
- D150 generally good performance for pointing.(2002-07-16)
- $/!\$ A230 often unstable, bad for pointing and flux monitoring. (2003-11-12)
- B230 OK
- $/!\$ C270 can be unstable and difficult for pointing. (2007-04-30)
- $/!\$ D270 can be unstable and difficult for pointing. (2002-07-16)