JCMT Newsletter No. 22 (ACSIS Configs)
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"Day 1" ACSIS Configurations
At the time of this writing (early March 2004) ACSIS is still
scheduled to arrive in May 2004 to be commissioned by July.
However, there are indications that its delivery may be delayed
until the Fall.
When ACSIS is fully commissioned, the expected "Day 1"
configurations available are listed below. "Hybrid" mode is
ACSIS-speak for use of more than one subband. The hybrid modes
have some significant subband overlap (20% or so), resulting in
a lower overall bandwidth than quoted. The bandwidths given are
independent of whether there are 1 or 2 mixer inputs. Although
there is no 125-MHz bandwidth, the number of available channels
more than compensates for that in terms of spectral resolution
using the 250-MHz bandwidth.
| Bandwidth | # Channels | Resolution | Hybrid? |
| 250 MHz | 8k | 30.5 kHz | N |
| 500 MHz | 16k | 30.5 kHz | Y |
| 1000 MHz | 2k | 488 kHz | N |
| 2000 MHz | 4k | 488 kHz | Y |
| 1000 MHz | 32k | 30.5 kHz | Y |
Gerald Schieven
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