Australia Telescope Compact Array Local Oscillator Upgrade
A brief summary of the Australia Telescope Local Oscillator Upgrade project
is presented here. Further details for scientists and engineers are given
in the Technical
And Scientific pages.
A very stable local oscillator reference frequency is sent to each antenna
of the Australia Telescope Compact Array. Currently, the local oscillator
reference frequency is distributed linearly along a single 7/8 inch co-axial
cable. The reference frequency is used to determine the frequency and phase
of the astronomical signal observed and is used in the conversion of the
high-frequency astronomical signal to a lower-frequency signal that the
electronics then amplifies.
Part of the MNRF grant to the Australia Telescope is being used to improve
the Australia Telescope Compact Array local oscillator reference frequency
distribution. The improved local oscillator reference frequency distribution
will be more reliable and will provide the required low phase-noise and
stability for local oscillators up to 110 GHz. In the new system, single-mode
fibre-optic cable will be used to distribute the local oscillator reference
frequency continuously to each antenna, using a new "star" technology.
Further details for scientists and engineers are given in the Technical
And Scientific pages.
Go to MNRF
Projects Page
Go to MNRF Home Page
Go to ATNF Home Page
Last update by Michelle Storey. 14/10/98