2.8 cm (10.7 GHz, Secondary Focus) Receiver

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Receiver Data

TypeHEMT; cooled
Channels8
Receiver Noise Temperature50 K
Frequency Range10.3 - 10.6 GHz
Bandwidth RF-Filters10.3 - 10.6 GHz
PolarizationLHC and RHC
CalibrationNoise Diode
VTO: yes
Broadband Polarimeteryes
FeedSecondary Focus Feed
1. IF2.2 - 2.3 GHz
1. OscillatorULO1 (x5) 1.62 - 1.66 GHz
2. IF100 - 200 MHz
2. OscillatorULO2 (x3) 1.8 - 2.4 GHz


Block Diagram



Comments

The system comprises 4 feeds, 8 channels and 4 Broadband Polarimeters. 16 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 distances of approximately 3, 9 and 5 arcmin.
The RF-filter is essential to protect against TV-satellites.
The system needs special offline reduction programmes. Non-MPIfR users should contact E. Fürst or W. Reich for information.