2.2 cm (13.25 GHz, Primary Focus) Receiver
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Receiver Data
| Type | HEMT, cooled |
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| Channels | 2 |
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| Receiver Noise Temperature | 40-50 K |
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| Frequency Range | 12.9 - 13.6 GHz |
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| Bandwidth RF-Filters | 12.9 - 13.6 GHz |
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| Polarization | LHC and RHC |
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| Calibration | Noise Diode |
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| Feed | Prime Focus Horn |
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| 1. IF | 1.72 - 2.48 GHz |
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| 1. Oscillator | ULO1 (x8) 1.331 - 1.418 GHz |
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| 2. IF | 100 - 200 MHz |
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| 2. Oscillator | ULO2 (x3) 2.1 GHz |
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Block Diagram
Comments
The 13.25 GHz system is a total power receiver with cooled HEMT preamplifiers. It is mainly
constructed for spectroscopy measurements. There is no polarimeter available.
The broadband IF output is prepared to be connected to the MPIfR AOS
(currently not available) for broadband spectroscopy or search for interference. The V/F-Converters at the broadband detectors have a maximum frequency of 5 MHz to give enough resolution for pulsar work.
Charts
| Sky Frequency | Tcal Channel A | Tcal Channel B |
|---|
| 13.04GHz | 21.0K / 1.8K | 22.7K / 1.9K
|
| 13.25GHz | 20.8K / 12.1K | 22.3K / 2.1K
|
| 13.45GHz | 17.7K / 1.4K | 20.1K / 1.9K
|