Not all is well at K-band:
Antennas 13, 14, and 16 seem fine, with good stability and normal
sensitivity.
Antenna 18 appears dead.
Tsys for all four of these antennas is normal -- in the 40s.
Antenna 24 is either dead, or extremely weak. Its listed Tsys is
360K! The derived bandpass is not normal -- being of effective width ~
6 MHz, and centrally peaked.