LBC Sequence Iterator
The LBC Red and LBC Blue Iterators allow users to change the configuration of the instrument (i.e. the mechanisms and detector readout) to configure more complex observations.
The LBCB and LBCR Iterators are basically identical; the only difference is the filter complements offered (see the figures below). The other items available to iterate are Exposure Time and Number of Exposures and these are identical between the two cameras.
Example with LBCR Sequence Iterator
In this example we will configure LBCR to take exposures in several filters
1) We start by adding a LBC Sequence Iterator using the Iterator Button on the Left Sidebar. At first, we will have a completely blank LBCR Sequence Iterator:
2) In Available Items Click on Filter. A list of filters will display; the filter auto-selected will match the filter you specified in the initial instrument configuration completed in the LBC Instrument Element.
Pro Tip: If you change any configuration in the first line (step) of this iterator, that item will change in the LBC Instrument Element to reflect the new value. For instance If your initial filter was V-Bessel and you click on I-Bessel in the Sequencer, the LBC Instrument Element would now have I-Bessel as the filter selection.
3) Next, click on Exposure Time from the Available Items box. Again, the exposure time will be the one specified in the LBC Instrument Element. Change with precaution.
4) Click on Number of Exposures from the Available Items box. The number of exposures will reflect the value specified in the LBC Instrument Element. Change with precaution.
5) Now we would like to add another step to this sequence. Click on the Add Step button toward the bottom right of the Iterator. This will create an identical step to the first. Click on the Item (Filter, Exposure, or Number of Exposures) in the Iteration Configuration (bottom frame) that you would like to change; in this case it is the filter. Once the options “Select Filter” appear in the left frame, make your selection — we would like to move from I-Bessel to V-Bessel, so select that option. We now have specified 3 x 180s exposures in I-Bessel and V-Bessel.
6) To finish this example, I will add another step, again using the Add Step button, which will create a clone of the previous step. I would like to change the filter to z-sloan, the exposure time to 100s and the number of exposure to 4. I click on Filter in the bottom frame and choose z-sloan from the filter list. I click Exposure Time in the bottom frame. I will see a text box appear in the upper right; this is where I should type my new value. The bottom frame is READ ONLY.
7) Finally, click on Number of Exposures and set the value in the top left text box to 4. Now the Instrument Sequence is complete. If I have specified no dithers, this would take 3 x 180s V-Bessel; 3 x 180s I-Bessel, and 4 x 100s z-sloan frames.
