HP 7470A Interfacing And Programming Manual page 213

I P2 (10 250 , 7479)
18 000
User
Units
'_F'l£5(l_'E7i________________j 2
\_ J
'K
25 000 User Unlts
Solution
A. Recall that the equations of a circle are:
X = R cos t
Y = R sin t
where0<t<27r
B. Since we are to plot relative to a point that is not at the origin,
an offset X0, Y0 must be added to the circle equations. The
offset in user units is:
X0 = 12 500
Yo = 9000
C. The desired circle equations are then:
Ax = 2500 cos t + 12 500
Ay = 2500 sin t + 9000
D. Determine the user scale:
X = 0 to 25 000
Y = 0 to 18 000
therefore
Ulx = O
Uly : 0
U2x = 25 000
U2y = 18 000
REFERENCE MATERIAL C-3