<s>
A	O
manual	B-Device
pulse	I-Device
generator	I-Device
(	O
MPG	O
)	O
is	O
a	O
device	O
for	O
generating	O
electrical	B-Algorithm
pulses	I-Algorithm
(	O
short	O
bursts	O
of	O
low	O
current	O
)	O
in	O
electronic	O
systems	O
under	O
the	O
control	O
of	O
a	O
human	O
operator	O
(	O
manually	O
)	O
,	O
as	O
opposed	O
to	O
the	O
pulses	O
automatically	O
generated	O
by	O
software	O
.	O
</s>
<s>
For	O
example	O
,	O
the	O
handwheel	O
of	O
a	O
typical	O
CNC	O
control	O
will	O
move	O
any	O
of	O
the	O
slides	O
of	O
the	O
machine	O
by	O
one	O
minimum	O
increment	O
,	O
such	O
as	O
1	O
micrometre	O
or	O
1	O
ten-thousandth	O
of	O
an	O
inch	O
,	O
for	O
each	O
pulse	O
,	O
and	O
the	O
handwheel	O
will	O
give	O
one	O
ratchet-like	O
click	O
or	O
other	O
haptic	B-Device
click	I-Device
to	O
confirm	O
to	O
the	O
user	O
that	O
a	O
single	O
increment	O
occurred	O
.	O
</s>
<s>
The	O
modern	O
trend	O
in	O
CNC	O
user	O
interface	O
design	O
is	O
to	O
place	O
the	O
MPG	O
on	O
a	O
handheld	O
pendant	O
that	O
the	O
operator	O
can	O
carry	O
,	O
making	O
it	O
conveniently	O
independent	O
from	O
the	O
main	O
control	O
panel	O
,	O
just	O
as	O
a	O
game	B-Device
controller	I-Device
is	O
independent	O
from	O
the	O
video	B-Device
game	I-Device
console	I-Device
.	O
</s>
