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12 Meter Telescope - Receiver Information
The following table contains information about the frequency coverage,
average receiver temperatures, and availability for the 12 Meter Telescope
receivers. Note that the near the band edges mixer performance may be degraded.
| Receiver |
Frequency Range (GHz) |
Trx (K) |
Availability |
| *ALMA Type Band 3 |
83 - 116 GHz |
40-60 (SSB) |
New Fall 08 |
| 3mmlo |
68 - 90 |
100 (SSB) |
all year |
| 3mmhi |
90 - 116 |
80 (SSB) |
all year |
| 2mm |
133 - 180 |
125 (SSB) |
all year |
To see the historical record of Tsys for these
receivers, look here.
* New 3 mm (ALMA Band 3)
Receiver:
The sideband-separating mixers for this system have been provided by
the Herzberg Institute for Astrophysics (HIA). This receiver was put
on the 12 m in May 2008 for test observing with a single
polarization. System temperatures on the sky were typically less
than 200 K, SSB, in 5-8 mm of water vapor. Image rejection was
typically 20 dB. This receiver showed exceptional stability, and
excellent data was obtained. The current plan is to upgrade this
receiver to dual-polarization for Fall 2008, with availability for
general observing. This receiver will replace 3 mm HI. |
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