Table 1: Antenna-related parameters
Table 2: Overview of spectral line SIS receivers
Table 3: Spectral line backends
Spectral line observing capabilities
Position switching: absolute and relative OFF positions possible
Raster mapping: position switching with several ON's (on a regular grid)
per OFF
Wobbling secondary: max. 4
in azimuth at 0.25 Hz
Frequency switching: max. 45 km/s throw at max. 0.5 Hz, with 100 kHz
filters and autocorrelator only
On-the-fly mapping: under development at the time of writing
Pointing: offset pointing = 0.5
(sources within 10),
absolute pointing = 3
, check every 2 hours.
Focus: residual errors 
1 mm may need correction;
receivers have the same focus except 230G2 (--0.5 mm difference). Check
the focus at least at sunrise and sunset.