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Type | HEMT cooled | ||||
Channels | 4 | ||||
Receiver Noise | 50K | ||||
Frequency range | 10.3 - 10.6 GHz | ||||
Polarization | LHC/RHC | 2 horns | |||
Calibration | Noise diode | ||||
Polarimeter | Broadband Polarimeter | ||||
1st IF | 2.2 - 2.3 GHz | ||||
LO1 | Valon 5009 | fsynt.1 = 4.15 GHz x 2 | (preset 8.3 GHz) | ||
2nd IF | 100 - 200 MHz | ||||
LO2 | Valon 5009 | fsynt.2 = 2.1 GHz | (preset 2.1 GHz) |
Simplified Block Diagram of the receiver, (RK on 24.4.2018)
The system comprises 2 feeds, 4 channels and 2 Broadband Polarimeters. 8 data channels, 2 total power and 2 polarization signals per feed are recorded. This total power system is being used in a "software beamswitching" mode to observe extended sources. The feeds are mounted in a row in azimuth direction, having a distance of approximately 3 arcmin. The frequency scheme is fix, the receiver has built-in local oscillators that can't be changed. The RF-filter is essential to protect against TV-satellites. The system needs special offline reduction programmes.