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Receivers
All NOEMA antennas are equipped with 2SB receivers, providing low
noise performance and excellent long-term stability. The receivers
provide two orthogonal linear polarizations in all three bands. Each
of the two polarizations delivers a bandwidth of 7.744GHz in the
lower sideband (LSB) and upper sideband (USB) simultaneously. The sky
frequency ranges that can be covered in each band and further
characteristics are given in Table
. Receiver tuning
will preferentially be done on a fixed frequency grid of 500MHz step width, on which the receiver performance is
optimized (see Sect.
for more details).
Table:
Receiver specifications.
|
Band 1 |
Band 2 |
Band 3 |
range/[GHz] |
82.000-108.256 |
138.616-171.256 |
207.744-264.384 |
range/[GHz] |
70.384-119.872 |
127.000-182.872 |
196.128-276.000 |
/[K] |
25-45 |
35-55 |
40-70 |
/[dB] |
-15-...-10 |
-15...-10 |
-15 ... -10 |
Guaranteed LO1 frequency
ranges per offered band. The LO1 frequency is the center frequency
between the USB and LSB that can both be simultaneously observed in
one tuning (see Fig
). The center frequency of the USB
(LSB) is separated by
(
)7.744 GHz from the LO1 frequency. With
an effective width of 7.744 GHz per sideband the lowest and highest
sky frequencies that can be covered per tuning are therefore
=
11.616 GHz. The lowest and highest LO1
frequencies per band define the
ranges that are currently guaranteed.
for LSB and USB.
Next: The Wideband Correlator PolyFiX
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Gildas manager
2023-06-01