DATA
ENTRY
All variables are entered
into
the
3314A
with
the
MODIFY
knob
and
the
RANGE
UP or
DOWN
(t
or 1) keys. Variables are entered literally
from
the
HP-IB, see HP-IB
Programming
for
more details.
Modify
Knob
The MODIFY
knob
has 2
distinct
modes: a
multi
speed mode
to
quickly
make large
changes and a
cursor
mode
for
fine
tuning
or making
constant
increments. The
3314A
is in cursor
when
a
digit
in
the
display is flashing. The flashing
digit
is in-
cremented
or decremented by 1 every
time
rotation
of
the
MODIFY knob is sens-
ed.
The
LEFT and RIGHT ARROW
keys
move
the
digit
through
the
display. When
no
digit
is flashing,
the
3314A
is in
the
multispeed mode. The display is in-
cremented by
1,2,4,8,16
or
32
depending upon
how
fast
you
rotate
the
Modify
knob.
Range Up or
Down
The RANGE UP
key
multiplies
the
display
by
10.
The RANGE
DOWN
key divides
th~
display by
10.
If
the
result
would
be operation
outside
the
limits
of
the
3314A,
the
key
and
the
HP-IB
commands"
RU" or
"RD"
are ignored.
Range Hold
Frequency,
Amplitude
and
Offset
are
implemented
in
the
3314A
with
several
dif-
ferent
hardware
configurations,
called ranges. Range Hold
allows
the
user
to
limit
the
operation
to
a single
hardware
configuration.
The advantage
of
Range Hold is
that
the
range
of
operation
without
a discrete step is increased.
Another
advan-
tage
from
the
front
panel is
the
extended range of
constant
increments.
Since
the
3314A's
output
frequency
is synthesized in frequency ranges 7 and 8, Range
Hold can increase
the
range
of
synthesized
output
frequencies
down
to
1kHz. The
primary
disadvantage is reduced resolution in
the
lower
portion
of
each range.
51
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