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--- information_for_astronomers:rx:s7mm_db [2018/07/11 11:40]
ubach created
+++ information_for_astronomers:rx:s7mm_db [2020/05/18 10:36]
akraus
@@ Line 1: / Line 1: @@
 ====== 7mm secondary focus receiver (33500-50000 MHz) ======
- This is a 4-channel two horn system for continuum, spectroscopy and VLBI observations. This is a new receiver currently in commissioning and was installed in March 2018. More details will follow.\\
+This is a 4-channel two horn system for continuum, spectroscopy and VLBI observations.\\
+Attention: When frequencies lower than 35 GHz are selected, the receiver operates in
+double sideband mode for some parts of the observed bandpass. Please contact staff for
+advice.
 ==== Calibration Information ====
@@ Line 14: / Line 17: @@
 |42.75 |A |LCP |9.5 |84 |0.76 |110 |26 |1.5 |50 |20.9 |May 2018 |
 |42.75 |B |RCP |8.7 |85 |0.77 |111 |27 |1.5 |50 |21.1 |May 2018 |
+|44.1 (narrow band)|A+B |LCP+RCP |13 |100 |0.66 |140 |23 |1.67 |40 |19.5 |Dec 2019|
 |45.25 |A |LCP |8.5 |99 |0.63 |156 |22 |1.5 |42 |19.7 |May 2018 |
 |45.25 |B |RCP |8.2 |103 |0.65 |159 |22 |1.5 |47 |19.8 |May 2018 |
 ^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^
-|A0 = 0.897 |A1 = 7.5E-3|A2 = -1.35E-04|Below 40 GHz, May 2018 | |
+|A0 = 0.897 |A1 = 5.93E-3|A2 = -8.52E-05|Below 40 GHz, Aug 2018 | |
 |A0 = 0.897 |A1 = 7.85E-3|A2 = -1.5E-04|Above 40 GHz, May 2018 | |

Effelsberg 100m Teleskop