Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
Thank you for your manual It has the basic things to and i use the Oszi for Longer Time.
THX
Text excerpt from page 30 (click to view)
EL-9600/9400 Graphing Calculator
Step & Key Operation
(When using EL-9600) *Use either pen touch or cursor to operate.
Display
(When using EL-9600)
Notes
2-1
Enter y = 3(4 - 2x) for Y1 and y = 5 - x for Y2.
Y=
ENTER
* *
5
(7 times) DEL (4 times)
�
X/ /T/n
2-2
View the graph.
GRAPH
2-3
Access the Set Shade screen.
2nd F DRAW
G
*
1
*
2-4
Set up the shading.
� �
*
*
�
*
Since the inequality being solved is Y1 � Y2, the solution is where the graph of Y1 is �on the top� and Y2 is �on the bottom.�
2-5
View the shaded region.
GRAPH
2-6
Find where the graphs intersect and solve the inequality.
2nd F CALC
2
*
The point of intersection is (1.4, 3.6). Since the shaded region is to the left of x = 1.4, the solution to the inequality 3(4 - 2x) � 5 - x is all values of x such that x � 1.4.
Graphical solution methods not only offer instructive visualization of the solution process, but they can be applied to inequalities that are often difficult to solve algebraically. The EL-9600/9400 allows the solution region to be indicated visually using the Shade feature. Also, the points of intersection can be obtained easily.
