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.
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 (not available any more) | A+B | 2x lin | 97.0 | 48 | 1.25 | 38 | 44 | 930 | Sep 2012 | ||
1.4 | A+B | 2x lin | 188.0 | 56 | 1.25 | 45 | 44 | 650 | 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 | ||
---|---|---|---|---|
A0 = 1.0 | A1 = 0.0 | A2 = 0.0 | Sep 2012 |
Comments:
RX Name | Wavelength [cm] | Frequency (center) [GHz] | Nr. of Horns |
---|---|---|---|
P170mm UBB (1.2-3 GHz) | 25.0-10.0 | 1.2-3.0 (1.8) | 1 |
Version: | Comment | ||
1. Continuum/Line | Continuum and spectroscopy version | ||
2. Pulsar | Pulsar Version | ||
Horn offsets [arcsec] | 0.0, 0.0 |
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 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:
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
P170mm UBB (1.2-3 GHz) | |||
---|---|---|---|
Channel | IF | Pol. | Comment |
1 | optical | Horizontal | TP A |
2 | optical | Vertical | TP B |
TODO