...
- Setup & Starting an Exposure
- Grating Setup
- Motorized Stages
- Controlling the Arc Lamps
- Issuing a TCS Offset Command
- Controlling the Rotator Position Angle
- Defining Subframes
- Setup for Focus Sequence
Tooltips are available for most fields.
| Anchor | ||||
|---|---|---|---|---|
|
...
- Test - initiates the exposure in test mode so the image is saved in
test.fits. This file will be overwritten the next time the button is pressed. - Promote - Converts
test.fitsto a numbered image. This only works iftest.fitswas the last image taken. - Go - starts an standard exposure based on the values of the text fields on the view. The image will be saved in a named and numbered file based on the parameters set in the info view.
- Pause - Not implemented yet.
- Stop Series - This will stop the series when the number of exposures is greater than 1. The current exposure will continue.
- Abort - Aborts the current exposure but does not affect the series.
- Reset - Changes all the text field values back to the default startup values which are read from the config file.
The text fields are self-explanatory. For more detailed information on the text fields for the camera control please refer to the instrument manual. One thing to remember is that subframe = 0 means full frame.
| Anchor | ||||
|---|---|---|---|---|
|
...
The grating changes are done manually by the TOs. The drop downs below the last FITS Comment text box are used for inclusion in the FITS headers.
| Anchor | ||||
|---|---|---|---|---|
|
There are three motorized stages for DeVeny; Slit Width, Collimator Focus and Grating Tilt. The readouts in each widget indicate the status, motor step and encoder values (where available) for the stages. The status info is cryptic but putting the cursor on it will show a tooltip explaining the codes.
| Warning |
|---|
It is important to move the stages one at a time. Due to power requirements for the stages, moving more than one stage at a time is not allowed. |
| Tip |
|---|
The software should not allow the execution of a move if one of the stages is already moving. Under rare circumstances, the status for one or more of the stages may not reflect the completion of a move command. In such cases, the software would not allow the execution of a move command till the status has been cleared. Make sure that none of the stages are moving and then initialize the stages. |
| Anchor | ||||
|---|---|---|---|---|
|
???The arc lamps can be controlled via a PDU (Power Distribution Unit). The execution on the widget is disabled by default as a precaution to not accidentally turn a lamp on or off. Enable the widget to control the lamps but it is advisable to disable it after one is done with calibration. The timestamp below the widget shows the last time the PDU was queried for its status. If the label is red, it means that the last query was longer than the standard query period and that there is a problem with communication with the PDU.
| Anchor | ||||
|---|---|---|---|---|
|
The built-in offset command There are 2 types of offset commands in the TCS is absolute and has ; User and Handset. The User offsets are absolute and the the Handset offsets are relative. There are three modes; TPLANE, SIMPLE, and PA. The relative offset command is a LOUI implementation by issuing an absorb command immediately after the offset command.
It is advisable not to use the relative offset as it is unsupported relative offsets except when one is using the hand paddle as they are not supported for cases such as guided offsets.
Sending the clear command is equivalent to sending 0,0 as the parameters an absolute offset and the absorb command causes the pointing center to change to the current location and clears the current offsets in the TCS.
The hand paddle allows one to send incremental relative offsets for each of the three modes. Pressing one of the hand paddle buttons will increment the current offset parameter and send it immediately to the TCS. The hand paddle only works with absolute issues relative offsets.
The tooltips on the labels show the appropriate units for each parameter. The hand paddle text also shows the relevant units for each mode.
| Anchor | ||||
|---|---|---|---|---|
|
Similar to the TCS Offset Command widget, this widget is also presented for the user's convenience. Generally speaking the TOs issue this command on the TCS GUI.
| Anchor | ||||
|---|---|---|---|---|
|
...
Defining Subframes
xpix & ypix are the center pixel values and the xsize & ysize are the number of pixels you want for the subframe being created. Then you just have to pick a number for the subframe and make sure to put the correct subframe number in the box on the upper right before taking the image. By default subframe number of 0 is reserved for full size image.
| Anchor |
|---|
...
|
This widget allows the user to set up acquisition of images for a focus sequence. For more detail refer to the instrument manual.
...
???