10-sep-92 Rev C
          HOW TO WRITE IMAGES TO THE NVS/SONY LASER DISK SYSTEM
         --------------------------------------------------------

I. HARDWARE:  Positioning the Sony Laser Disk

1. Check that the green light on the NVS is on.  Power cycle if necessary.
2. Check that the RS-232 cable is connected from the NVS to the Sony LVR-5000.
3. Make sure the correct optical disk is inserted (check side A or B).
4. Put the "LOCAL/REMOTE" switch in the local position.
5. Depress the "REC STANDBY" button to initiate blank frame check.
   This will find positions of all blank areas on the disk.  
   When completed, the disk will be positioned to the last recorded
   frame before the nearest (not necessary the first) blank frame.
6. Use the record "SKIP" buttons to position the laser disk to the last 
   recorded frame before the desired starting frame number (consult the
   Sony Laser disk log book).  On the display, Cont. Rec = is the last
   recorded frame before the blank frame; DUR = number of blank frames.
7. Toggle the format of the numbers displayed to show the time-format.  
   Record numbers in the log book.   To start over, press the "CLEAR" button.
8. Set the left console switch to "remote".


II. SOFTWARE

1. Login onto a non-isass0 machine (isass1-4).  

2. Enter IDL.  Make sure no other IDL window jobs are running on the same
   workstation.  If there are two jobs, the color table could be corrupted.

3. Then enter one of the following:
   IDL> go_nvs5,/sfd			; Standard weekly movie making
   IDL> go_nvs5,/help			; For on-line documentation
   IDL> go_nvs5,increm=5,/sfd		; Less of an impact on workstation
					
   The temporary NVS files will be written to your home directory.
   Use the nvsdirfn='/1p/user/nvs0' switch to redirect to another location.

   The default increment is 10.  This is good if no one else is using the
   workstation at the same time.

   If the  /sfd switch is given, go_nvs5 will read the files from /yd1/sfd.
   It will run the program with the usual default answers.  These are:

* Use default sfd files for input data?     [Default: Y ]	; Y for /yd1/sfd
* Display a 2nd image set?                  [Default: Y ]	; use default
* Decompress the 2nd image?                 [Default: Y ]	; use default
* Hist_scale type scaling on 2nd image?     [Default: Y ]	; use default
* Enter first comment line (10 char max)    [Default: SXT Movie ]   ;use default
* Enter second comment line (15 char max)   [Default: sfd92_34a.03 ];use default
* Enter a color table value:                [Default: 3 ]	; use default
* Enter a color gama  value:                [Default: 1.00000 ]	; use default
* Enter color table for 2nd image display:  [Default: 0 ]	; use default
* Enter the first image to process          [Default: 0 ]	; use default
* Enter the last  image to process          [Default: xxx ]	; use default
   Next you will get a message about the current frame number.  Verify that
   it is the desired frame number of time.  Then, ...
* Enter C to continue or anything to quit   [Default: C ]	; use default


III. ADDING ANOTHER MOVIE

The above procedure is for starting from scratch.  If you have just completed
a run and the Sony frame number has not been changed, then just type:
    IDL> go_nvs5 [,/sfd]
to make the next movie, answering the questions as before.

IV. PROBLEMS

1) Invalid Num	-- If the message "Invalid Num" appears on the display
	monitor, the nvs box is not in sync with the Sony laser disk.  To
	correct this situation begin with a blank frame check (see
	above hardware procedure) and follow that with software procedure 
	(section II).

2) One common problem is to forget to attach the RS-232 cable.  This is
   sometimes switched to ISASS3 to control the recorder during playback 
   (to record with the VCR).

3) How to toggle the format frame/time format:  depress the frame/time 
   button located on the lower-left side of the console number keypad--where 
   frame # is a simple number and time has the format of mm:ss:ff.

Good luck