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A 500 to I speedup of the entire computer is also provided by the TIME SCALE
pushbuttons.
The TIME SCALE pushbuttons control the time scale relays located
in each integrator tray through the time scale bus system.
The 500 to 1 speed-
up controls both integrators in a dual integrator tray.
In the 2 ms range, the
time scale bus is at a logic ZERO level energizing the time scale relay.
Ener-
gizing this relay switches capacitance from 10
~f
to 0.02
~f,
speeding up the
problem by a factor of 500.
(The problem is automatically rescaled when speeded
up by a factor of 500.)
The 1 SEC pushbutton switches the time scale bus to a
high (+5v) logic level, the relays are de-energized and the computer resumes
normal problem speed.
Note that the TIME SCALE pushbuttons only affect the normally patched integrators.
By local patching, it is possible to control the time scale input of the inte-
grators, located in a particular tray, independent of the master time scale
selection system.
In addition, it is possible, by local patching, to speed up
a factor of 10 to 1 individual integrators.
Table 1.4.
Time Periods
TIME SCALE
X
(Multiplier)
Vernier
Time
2 MS
XO.l
0.5 to 10.5
100 \-LS to 2 MS
2 MS
XI.O
0.5 to 10.5
1 MS to 20 MS
2Ms
XlO.O
0.5 to 10.5
10 MS to 200 MS
1 SEC
XO.l
0.5 to 10.5
50 MS to 1.0 SEC
1 SEC
Xl.O
0.5 to 10.5
0.5 Sec to 10.0 SEC
1 SEC
XlO.O
0.5 to 10.5
5.0 Sec to 100.0 SEC
t
1.3.7
POWER Pushbuttons
The POWER pushbuttons control the power for the entire computer.
To activate
the computer, depress the ON pushbutton.
To turn the computer off, depress
the OFF pushbutton.
The ON pushbutton contains an indicator lamp which lights
to indicate that the computer is "ON".
1.3.8
LOGIC MODE Pushbuttons
The LOGIC MODE pushbuttons consist of four momentary pushbutton switches used
to control the 580 Logic Package.
These switches are connected in such a
manner that when one is depressed it electrically clears any previously selected
modes.
An indicator lamp in each pushbutton indicates, when lit, which mode is
selected.
The LOGIC MODE pushbuttons are included only when a logic package is
installed in the computer.
Table 1.5 lists the description and function of each
LOGIC MODE pushbutton.
1-19
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