====== 1.0cm primary focus receiver (26500-38500 MHz) ======

This receiver was build for spectroscopic observations. It has a linearly polarized feed. 

==== 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 ^
|27.0 |A |linear |7.2 |68 |0.94 |71 |34 |1.8 |54 |30.5 |Mar 2010  |
|30.0 |A |linear |7.0 |85 |0.90 |84 |32 |1.5 |60 |30.0 |Mar 2017  |
|34.0 |A |linear |12.0 |75 |0.86 |86 |30 |1.5 |61 |25.0 |Mar 2010 |
|36.1 |A |linear |15.0 |82 |0.56 |146 |20 |1.4 |49 |25.8 |Sep 2014 |

^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in / confirmed ^
|A0=0.9161|A1=4.28E-3 |A2=-5.5E-5|Sep 2020 (29 GHz)| 
|A0=0.8473|A1=1.0795E-2 |A2=-1.9074E-4|Sep 2014 (36 GHz)| 

**Comments:**
  * Typical zenith opacities range from 0.05 to 0.2 depending on the sky frequency and weather conditions. 
  

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

^ RX Name ^ Wavelength [cm] ^ Frequency (center) [GHz] ^ Nr. of Horns ^
| **P10mm 4-Box (26,5-38,5 GHz) ** | 1.0 | 26.5-38.5 | 1 | 
| **Version:** |   **Comment**   |||
|1. Cont./Line: 26,5-29,1 GHz (BW: 500 MHz) | Continuum and spectroscopy 1st freq. range |||
|2. Cont./Line: 28,52-32,7 GHz (BW: 500 MHz) | Continuum and spectroscopy  2nd freq. range  |||
|3. Cont./Line: 32,3-38,5 GHz (BW: 500 MHz)| Continuum and spectroscopy  3rd freq. range  |||
|4. Pulsar (BW: 500 MHz) | Pulsar version 1st freq. range (26.5-29.1 GHz) |||
| **Horn offsets** [arcsec]| -972.8, 1086.6 |||


==== 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

^ 1.0cm PFK (Multi-RX-Box I) ^^^^
^ Channel ^ IF ^ Pol. ^ Comment ^
|  1  |  BB     |     linear   | TP A  |
|  2  |  VLBA   |     linear   | TP A  |

==== Spectroscopy modes and resolution ====
^   BW ^ nchan ^    nu ^     Df ^     Dv ^     dv ^
^  MHz ^       ^   MHz ^    kHz ^   km/s ^   km/s ^
|  100 | 32768 | 27000 |    3.1 |  0.034 |  0.039 |
|  100 | 32768 | 29000 |    3.1 |  0.032 |  0.037 |
|  100 | 32768 | 31000 |    3.1 |  0.030 |  0.034 |
|  100 | 32768 | 33000 |    3.1 |  0.028 |  0.032 |
|  100 | 32768 | 35000 |    3.1 |  0.026 |  0.030 |
|  100 | 32768 | 37000 |    3.1 |  0.025 |  0.029 |
|  500 | 32768 | 27000 |   15.3 |  0.169 |  0.197 |
|  500 | 32768 | 29000 |   15.3 |  0.158 |  0.183 |
|  500 | 32768 | 31000 |   15.3 |  0.148 |  0.171 |
|  500 | 32768 | 33000 |   15.3 |  0.139 |  0.161 |
|  500 | 32768 | 35000 |   15.3 |  0.131 |  0.152 |
|  500 | 32768 | 37000 |   15.3 |  0.124 |  0.143 |

BW    ... band width\\
nchan ... number of spectral channels\\
nu    ... center frequency\\
Df    ... Channel separation (in frequency)\\
Dv    ... Channel separation (in velocity)\\
dv    ... Velocity resolution (dv=1.16*Dv)

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