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information_for_astronomers:rx:p170mm
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information_for_astronomers:rx:p170mm [2013/03/12 14:05] 127.0.0.1 external edit |
information_for_astronomers:rx:p170mm [2019/02/20 14:09] akraus |
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| ====== 17cm prime focus receiver, UBB (600-3000 MHz) ====== | ====== 17cm prime focus receiver, UBB (600-3000 MHz) ====== | ||
| - | This is a new ultra broad band (UBB) 2-channel system covering a range from 600 to 3000 MHz. Be aware that there is also a lot of RFI in this range. The system is mainly used for pulsar observations. | + | This is an ultra broad band (UBB) 2-channel system covering a range from 1200 to 3000 MHz. The band used to be |
| + | 0.6 - 3.0 GHz, but that was changed due to RFI issues. Be aware that there is still a lot of RFI in the current | ||
| + | frequency range. The system is mainly used for pulsar observations. | ||
| ==== Calibration Information ==== | ==== Calibration Information ==== | ||
| ^ Frequency [GHz] ^ Channel ^ Polarisation ^ Tcal [K] ^ Tsys [K] ^ Sensitivity [K/Jy] ^ SEFD [Jy] ^ Aperture Eff. [%] ^ TMB/S [K/Jy] ^ Main Beam Eff. [%] ^ FWHM [arcsec] ^ Last update ^ | ^ Frequency [GHz] ^ Channel ^ Polarisation ^ Tcal [K] ^ Tsys [K] ^ Sensitivity [K/Jy] ^ SEFD [Jy] ^ Aperture Eff. [%] ^ TMB/S [K/Jy] ^ Main Beam Eff. [%] ^ FWHM [arcsec] ^ Last update ^ | ||
| - | |0.85 |A+B |LCP+RCP |97.0 |48 |1.25 |38 |44 | | |930 |Sep 2012 | | + | |0.85 (not available any more) |A+B |2x lin |97.0 |48 |1.25 |38 |44 | | |930 |Sep 2012 | |
| - | |1.4 |A+B |LCP+RCP |188.0 |56 |1.25 |45 |44 | | |650 |Sep 2012 | | + | |1.4 |A+B |2x lin |188.0 |56 |1.25 |45 |44 | | |650 |Sep 2012 | |
| - | |2.35 |A+B |LCP+RCP |156.0 |53 |1.25 |42 |44 | | |400 |Sep 2012 | | + | |2.35 |A+B |2x lin |156.0 |53 |1.25 |42 |44 | | |400 |Sep 2012 | |
| ^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^ | ^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^ | ||
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| **Comments:** | **Comments:** | ||
| - | * New receiver, from 2012, preliminary data - more testing needed! | + | * Receiver has been modified in 2016 due to RFI issues. The frequency range was originally 0.6 - 3.0 GHz, now the lower band edge is as 1.2 GHz. |
| ==== Version description for OBSINP ==== | ==== Version description for OBSINP ==== | ||
| ^ RX Name ^ Wavelength [cm] ^ Frequency (center) [GHz] ^ Nr. of Horns ^ | ^ RX Name ^ Wavelength [cm] ^ Frequency (center) [GHz] ^ Nr. of Horns ^ | ||
| - | | **P170mm UBB (0.6-3 GHz) ** | 50.0-10.0 | 0.6-3.0 (1.8) | 1 | | + | | **P170mm UBB (1.2-3 GHz) ** | 25.0-10.0 | 1.2-3.0 (1.8) | 1 | |
| | **Version:** | **Comment** ||| | | **Version:** | **Comment** ||| | ||
| |1. Continuum/Line | Continuum and spectroscopy version ||| | |1. Continuum/Line | Continuum and spectroscopy version ||| | ||
| Line 30: | Line 32: | ||
| Note that the narrow line and VLBA IF channels are usually only available when the specific line version of the receiver was selected. In addition for most receivers with narrow line channels the cables at the patch board need to be connected by the receiver group. | Note that the narrow line and VLBA IF channels are usually only available when the specific line version of the receiver was selected. In addition for most receivers with narrow line channels the cables at the patch board need to be connected by the receiver group. | ||
| - | To select different channel numbers in OBSINP, the online plot, or the toolbox the numbers have to be specified like c(1)+c(2) to add channel 1 and 2. E.g. channel 1 and 2 contain the LCP and RCP broadband channels, then "OnlPlot pen='c(1)+c(2)'" or "toolbox use='c(1)+c(2)'" will select these channels. In OBSINP the pen can be directly specified in the receiver selection menu. | + | To select different channel numbers in OBSINP, the online plot, or the toolbox the numbers have to be specified like c(1)+c(2) to add channel 1 and 2. E.g. channel 1 and 2 contain the two (linearly polarized) broadband channels, then "OnlPlot pen='c(1)+c(2)'" or "toolbox use='c(1)+c(2)'" will select these channels. In OBSINP the pen can be directly specified in the receiver selection menu. |
| Abbreviations:\\ | Abbreviations:\\ | ||
| Line 40: | Line 42: | ||
| TP: total power | TP: total power | ||
| - | ^ P170mm UBB (0.6-3 GHz) ^^^^ | + | ^ P170mm UBB (1.2-3 GHz) ^^^^ |
| ^ Channel ^ IF ^ Pol. ^ Comment ^ | ^ Channel ^ IF ^ Pol. ^ Comment ^ | ||
| - | | 1 | optical | LCP | TP A | | + | | 1 | optical | Horizontal | TP A | |
| - | | 2 | optical | RCP | TP B | | + | | 2 | optical | Vertical | TP B | |
| ==== Tcal and Tsys measurements ==== | ==== Tcal and Tsys measurements ==== | ||
| TODO | TODO | ||
information_for_astronomers/rx/p170mm.txt · Last modified: 2024/01/17 18:36 by akraus
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