====== 2.6cm prime focus receiver (11700 MHz) ======

This is an uncooled single channel narrow band system for holography.

==== 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 ^
|11.7 | A | linear |  25  |  120  |  1.23  | | | | |  67  | Nov 2018 | 

^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^
|A0 = 1.0|A1 = 0.0|A2 = 0.0|May 2011| |

**Comments:**
   * None

==== Version description for OBSINP ====

^ RX Name ^ Wavelength [cm] ^ Frequency (center) [GHz] ^ Nr. of Horns ^
| **P26mm 4-Box Hologr.(11.7 GHz) ** | 2.6 | 11.7 | 1 | 
| **Version:** |   **Comment**   |||
|1. Astro-Version 11.7 GHz (BW: 100 MHz) | Narrow Band Continuum |||
|2. Holographie 11.698 GHz (BW: 100 MHz) | Holography version adds several dB attenuation  |||
| **Horn offsets** [arcsec]| -810.6, 970.8 |||


==== Channel assignment in the MBFITS data files ====

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.

Abbreviations:\\
SB: narrow band channel (Schmalband-Kanal), 100 MHz band width\\
BB: digital broad band channel (Breitband-Kanal), band width varies for different receivers\\
VLBA: VLBA IF, 500 MHz band width\\
BW: band width\\
TP: total power

^ P26mm 4-Box Hologr.(11.7 GHz) ^^^^
^ Channel ^ IF ^ Pol. ^ Comment ^
|  1  |  SB    |     LCP    | TP A  |

==== Tcal and Tsys measurements ====

TODO