TM 5-6675-320-14
a. All control, programming, and data signals are inputted and outputted via the
HP-IB interface cable.
I t a c t s a s a t r a f f i c c o n t r o l l e r f o r s i g n a l s a n d d a t a , a nd
commands input and output from the plotter.
b.
I n t e r f a c e c i r c u i t s p e r f o r m i n t e r n a l i n t e r f a c i n g f u n c t i o n s f o r s i g n a l s , d a t a,
and commands received into and outputted from the plotter.
I t t r a n s f e r s t h e d a ta
and commands the data processing.
c .
Data processing acts as the brain of the computer. It interprets the
commands and data, and implements the desired function by outputting signals to
direct the front panel controls, X-Y pen drive motors and the pen up/down solenoid.
d.
Local control circuits allow the operator to perform certain manual functions
using the front panel controls.
Signals produced by pressing the controls are sent
to data processing for implementation.
e .
Pen drive circuits control the movement of the chart pen according to the
instructions received from data processing.
f . P o w e r s u p p l y p r o v i d e s r e g u l a t e d v o l t a g e s t o a l l t h e c i r c u i t s i n t h e p l o t t e r.
It is turned on and off by a front panel control.
NOTE
I n t h e f o l l o w i n g d e s c r i p t i o n s o f t h e p l o t t e r ’ s f u n c t i o n a l o p e r a t i o n , a ll
r e f e r e n c e s t o l o g i c l e v e l s w i l l f o l l o w t h e f o l l o w i n g c o n v e n t i o n :
(A) High = 1 = True
(B) Low = Ø = False
4-3.2.1 98034A HP-IB Interface ROM with Cable.
Interfaces the computer and the
plotter and contains the interface bus (IB), used to send signal transmissions to
and from the plotter, and the ROM that controls those signals.
NOTE
References to the plotter and the HP-IB in this description are
synonymous, as the signal lines on the HP-IB come directly from the
p l o t t e r .
a.
The HP-IB interface performs four major functions:
(1) Monitoring signals from the HP-IB (from plotter) and computer.
( 2 ) T r a n s f e r r i n g d a t a b y t e s t o t h e p l o t t e r.
(3) Transferring data bytes and information to the computer.
(4) Allowing communication between the computer and plotter.
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