NOISE

NOISE is the specification for each IF of the switching mode of the noise cals on the VLBA. The usual for VLBI is 'low-s' which means that the low noise cal, about 3 K, is switching continuously at 80 Hz for continuous system temperature measurements, while 'low-c' means low continuous. 'high-s' and 'high-c' are the same requests for the high (solar) cals; beware that most receivers do not have solar cals.

This has no effect on the VEX file.

• Argument: 4 character strings of up to 6 characters each, one for each IF.
• Options: 'off', 'low-s', 'low-c', 'high-s', 'high-c'
• Default: 0 - which is interpreted to mean 'low-s'
• Usage: Defaults to previous station.
• Example: NOISE='low-s','low-s','low-s','low-s'