FE

FE gives four front end specifications for VLBA antennas, one for each IF (A, B, C, and D). Note that the 2cm front end on the VLBA has 4 filters; the on-line system chooses which to use based on the frequency of baseband channel 1, with the dividing points for the filter choice are 12.9, 13.9, and 14.9 GHz. FE = omit may be specified to cause a channel not to be used.

• Argument: A character string containing one of the options.
• Options: For elements 1 or 3: 20cm, 13cm, 6cm, or 7mm. For elements 2 or 4: 90cm, 50cm, 4cm, 3cm, 2cm, 1cm, or omit.
• Default: 0 - should be specified.
• Usage: Defaults to previous station if none are specified. If any are specified, only the new values are used.
• Example: FE(1)='20cm' FE(3)='20cm'