Historic 2016B-only SMA Passband Visualizer

(1) Select the correlator mode (Single Receiver 8 GHz bw or Dual Receiver / Full polarization 6GHz bw).
(2) Select the receiver (230/240/345/400 GHz).
(3) Select the sideband (LSB/USB).
(4) Select the spectral window for the SWARM correlator (S1-S4) in which the line center should appear.
(5) Enter the line frequency in GHz. The plots will refresh if you hit enter in the line frequency input window (or click the Update Plot button). The LO frequency will be updated.
(6) You can position the line away from the center of the chunk by giving a frequency offset (use the up/down arrow keys with the cursor in the frequency offset input box to change the value in units of 10 MHz).

The top panel in the figure shows an overview of the full tuning range for the selected band. The lower and upper sidebands are highlighted in yellow. Spectral lines are shown as vertical lines with various colors. Placing the mouse cursor on the tip of these lines will show the molecule name and rest frequency of that line. The spectral coverage of each sideband is shown in the lower two panels. Clicking on the tip of a spectral line will pop-up a new webpage with link to Splatalogue, with details about that line and other lines in nearby frequencies. Plots can be zoomed in or out by clicking on zoom buttons on top left corner. The original scale can be reset by either clicking the Update Plot button or just hitting enter in the Line frequency or LO frequency boxes. Spectral plots can also be panned by dragging with the mouse.

YIG spikes are shown in black, with yaxis values of 0.75. The default PLL harmonic is shown for a given tuning, but this can be varied to move the YIG spike. The PLL harmonic should always be an even integer, in increments of 2, with the highest value of 22.

Please send comments and bug-reports to Nimesh Patel (npatel[at]cfa.harvard.edu) (Last updated: 18 July 2016).