| 1. DRAW RESTRICTED PROFILE | Requires TWO cursors to be positioned in either the X or |
| Y plane and draws the profile of the data contained in | |
| the displayed image between the 2 cursor points. At the | |
| start the cursors are overlaid. This function is used for | |
| seeing estimates as it gives the FWHM of a star image in | |
| arcsecs. The profile is automatically erased when DIRECT | |
| is pressed. | |
| 2. SET PHOTOMETER APERTURE | Enables the size of a circle which can be used to mark |
| photometer apertures to be set numerically. The size (in | |
| arc seconds is displayed in the bottom right hand corner | |
| of the screen). The default value is 14" . | |
| To change this value | |
| i) Put FUN B UP | |
| ii) Put FUN A UP to increase the aperture size, | |
| DOWN to decrease. | |
| iii) Press ENTER n times. This will result in a change | |
| of n arcsecs. Limits of 5 and 30 arcseconds have | |
| been set. | |
| iv) To exit, press ENTER with both FUN A & B DOWN. | |
| The set value will be retained until specifically changed. |
| 3. DRAW PHOTOMETER APERTURE | i) Move cursor 1 to the required position. |
| ii) Press ENTER | |
| Multiple cursors can be drawn (without going back to | |
| MENU) by ensuring that FUN A or B is UP. A single | |
| aperture is drawn if both are down and this is also the | |
| exit mode. Apertures have to be specifically eased | |
| using ERASE OVERLAY. | |
| 4. CALCULATE MAGNITUDE | Requires one cursor to be positioned over the object, |
| and displays the integrated magnitude of the object. | |
| There is an arbitrary zero point for the magnitude scale. | |
| 5. DRAW CCD O/L | Draws the outline of the CCD chip on the TV screen |
| 6. CALCULATE DISTANCE | Calculates the distance in arcsecs |
| between 2 cursor positions. | |
| 7. INITIALISE | Initialises the TV system. No cursors. |
| Resets Parameters to f/15 focus. | |
| 8. ERASE ALPHANUMERICS | Clears the areas of the overlay planes |
| used for displaying information. | |
| 9. ERASE OVERLAY | Erases overlay plane number 2. |
| 10. ERASE IMAGE | Erases the image plane. |
| 11. ERASE PROFILE | Erases that area of overlay used to display the profiles. |
| 12. NEXT PAGE ... | Displays the second page of the menu which consists of ... |
| 13. TEST PATTERN 0,1,2,3 | Displays the Grinnell test patterns. |
| 14. ERASE TEST PATTERNS | Erases a test pattern. |
| 15. INTEGRATION PARAMETERS | Displays the current integration parameters |
| (i.e.the status of the rotary switches). | |
| 16. DRAW SLIT | Requires all 4 cursors to be positioned independently |
| and then joins them up. Intended to be used for marking | |
| slits, but can be used to draw any quadrilateral. | |
| 17. DRAW CIRCLE | Requires 2 cursors to be positioned to define the |
| diameter of a circle which is then drawn. Useful for | |
| defining the position of photometer apertures. |
| 18. DRAW BOX | Two cursors are enabled which are used to define the |
| side of a rhombus. The line joining the two points must | |
| have a positive gradient in the X-Y plane of the screen. | |
| If the 2 cursors have the same Y position, they will | |
| define the top side of a square. If they have the same X | |
| position, they define the left hand side of a square. | |
| 19. ZOOM | Zoom factors are determined by the state of the |
| function switches FUN A & FUN B on the cursor | |
| controller. Setting one or both of these switches | |
| followed by ENTER causes a new zoom factor to become | |
| operational. The factors are : | |
| FUN A set, zoom = 4 | |
| FUN B set, zoom = 2 | |
| FUN A+B set, zoom = 8 | |
| The zoomed image can be panned via the joystick. To | |
| exit from zoom, turn both function (FUN) switches off | |
| (down) and press ENTER. This facility requires the | |
| TRACK switch to be up (on). | |
| 20. F/8 FOCUS | Changes the scale of the displayed image to correspond |
| to the scale at the F/8 focus. Never needed as there | |
| is no TV at f/8. To return to f/15 do a MENU | |
| initialise. |