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1.9-cm primary focus receiver (13500-18700 MHz)

This is a 1-channel broad-band system used for spectroscopy. It has a linearly polarized feed. So far, only few test observations could be made to measure the variation of its parameters with frequency.

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
13.75 B linear 1.5 35 1.1 32 39 1.8 61 60.3 Mar 2001
15.42 B linear 1.7 37 1.2 32 41 1.8 64 53.5 Apr 2003
18.00 B linear 1.2 46 0.90 51 32 1.7 53 46.5 Mar 2001
normalized Gain curve (G = A0 + A1·Elv + A2·Elv2) Observed in confirmed
A0=0.95912A1= 2.5000E-3A2=-3.8149E-5Apr 2003


  • The values at 15.4 GHz could be derived from cross-scans during spectroscopic observations. Thanks to N. Nagar!
  • Values at 18 GHz are a bit uncertain.

Version description for OBSINP

RX Name Wavelength [cm] Frequency (center) [GHz] Nr. of Horns
P19mm 4-Box (13.5-18.7 GHz) 2.2-1.6 13.5-18.7 1
Version: Comment
1. Cont./Line: 13,3-16,75 GHz (BW: 500 MHz) VLBA IF Continuum and spectroscopy version, 1st freq. range
2. Cont./Line: 16,55-18,5 GHz (BW: 500 MHz) VLBA IF Continuum and spectroscopy version, 2nd freq. range
3. Cont./Line: 13,5-16,95 GHz (BW: 100 MHz) narrow band IF Continuum and spectroscopy version, 1st freq. range
4. Cont./Line: 16,3-18,5 GHz (BW: 100 MHz) narrow band IF Continuum and spectroscopy version, 2nd freq. range
Horn offsets [arcsec] -904.0, 1077.4

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.

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
optical: optical fibre with 4 GHz of band width
BW: band width
TP: total power

1.9cm PFK (Multi-RX-Box I)
Channel IF Pol. Comment
1 SB linear TP A
2 BB linear TP A
3 VLBA linear TP A

Tcal and Tsys measurements


information_for_astronomers/rx/p19mm.1363093765.txt.gz · Last modified: 2013/09/30 12:09 (external edit)