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: http://www.naic.edu/~astro/spectral_line/handbook/node3.html
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The available Gregorian receivers are listed in Table 1. In most cases, only one receiver will be available which will meet your frequency requirements. (REMEMBER - At present only one receiver can be used at a time.) In a few cases, such as in the L and S bands, more than one receiver may be available which suit your needs. In these cases, you probably want to choose the receiver with the narrowest frequency range which fits your need. Alternatively, you may wish to choose the most sensitive (lowest SEFD - system equivalent flux density) receiver. Conveniently, these two choices often lead to the same receiver (i.e. using the L-narrow over the L-wide, when possible). The most up-to-date information on the receivers can be found on the Arecibo web pages at http://www.naic.edu/astro/RXstatus/.
Frequency Range | Receiver Name | Native Pol. | Sensitivity | System |
(K/Jy) | Temp (K) | |||
0.312 - 0.342 | 327 | Dual Linear | 5-6 | 160 |
0.425 - 0.435 | 430 | Dual Circular | 55 | |
0.609 - 0.614 | 610 | Dual Linear | 8 | 130 |
1.12 - 1.73 | L-wide | Dual Linear | 8-11 | 35-40 |
1.28 - 1.50 | L-narrow | Dual Circular | 08-10 | 25-30 |
l .8 - 3.1 | S-low | Dual Linear | 7 | 40 |
2.33 - 2.43 | S-Radar | Dual Circular | 9-10 | 25-30 |
3.85-6.00 | C | Dual Circular | 4-8 | 32-34 |
8.0 - 10.0 | X | Dual Circular | 1.5-3* | 43.48* |
The L-narrow is circularly polarized only at 1420MHz | ||||
and becomes increasingly elliptically polarized away from this frequency. | ||||
*Receiver still being calibrated. These numbers are very preliminary. |
L-Wide Receiver Options: If you choose to use the L-wide receiver, a number of options not available to the other receivers must be decided. In particular, you must choose your polarization type and r.f. filter.
NOTE: A smaller filter bank will soon be available for both the L-Narrow and S-Wide receivers as well.