|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
|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
|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.
|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.
|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