Continuum BE (for continuum observations)

  • Total power detector + 16-bit AD
  • Process two(2) IFs simultaneously for a single receiver.
  • Process up to three(3) IFs simultaneously only for the H22 and H40 simultaneous observations.
FE# of channelsBandwidth (GHz)Notes
Single22 (5 – 7 GHz)
H22 & H403 (2 & 1)2 (5 – 7 GHz)
Table 5: Available Setting of Continuum BE

Distribution of IFs to Backend

  • Connections between receivers and Continuum BE are set manually by assistant/observer.
ReceiverBeamPolarisationIFNotes
H22RHCP (ch1)USB: 5 – 7 GHz
LHCP (ch2)USB: 5 – 7 GHz
H22 & H40H22RHCP (ch1)USB: 5 – 7 GHz
LHCP (ch2)USB: 5 – 7 GHz
H40LHCP (ch1)USB: 5 – 7 GHz
Z45HUSB: 5 – 7 GHz
VUSB: 5 – 7 GHz
FORESTHUSB-L: 5 – 7 GHz
USB-H: 8 – 10 GHz
LSB-L: 5 – 7 GHz
ILSB-H: 8 – 10 GHzChose 2 IFs
VUSB-L: 5 – 7 GHz
USB-H: 8 – 10 GHz
LSB-L: 5 – 7 GHz
LSB-H: 8 – 10 GHz
Table 6: Available Connections to the Continuum BE

Observing Modes

Beam switching with chopper wheel is always used. Chopping/wobbling of the sub-reflector is NOT available.

  • Cross scan