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IFDIST specifies the attenuation to apply in the IF distributers.
There is one value for each of the four IFs. This is only used to
attenuate the signals from solar observations or to select alternate
inputs, for example, for mm observations at VLBA sites with links to
This currently (Oct. 2001) is not implemented for VEX files.
- Argument: A character string of up to 3 characters. The integers 0 and
20 are also acceptable.
- Options: 0, 20, 'A', '20A', or 'A20' but nothing
else. 0 - normal input, no attenuation. 20 - normal input,
20db attenuation. A - alternate input, no attenuation. 20A and A20 - alternate input, 20db attenuation.
- Default: 0
- Usage: Defaults to previous station.
- Example: IFDIST=0,0,'A',0