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Autorange
Limits
The 4708
displays
an
Error 7
and
sounds
its
buzzer
when
any
attempted frequency increment or
decrement
is
made
which
would
produce an
invalid
combination of
FUNCTION, OUT-
PUT
RANGE
or
FREQUENCY.
Neither
will
it
increment
or
decrement
to
a frequency
beyond
the limits
of
the
next
fre-
quency
range
up
or
down.
OUTPUT/FREQUENCY CONSTRAINTS
AC
Voltage
and Frequency
Under most
conditions, the
output amplitude
and
frequency
are
adjustable
throughout
their
full
scales:
Voltages
—
from 90|iV
to
1
lOOV
RMS
Frequencies
—
from
lOHz
to
IMHz
On
the
lOOV
and
lOOOV
Ranges,
certain
combinations of
voltage
and
frequency cannot
be
selected.
The
diagram below
illustrates
the
boundaries.
The lOV Range
span
is
also
shown
for
comparison.
The 4708
refuses
to
select
any Voltage/Frequency
combination
outside these
constraints.
The
temporary
message
Error 7
is
displayed
for
approximately
1
second
before
reverting
to
the
original display.
AC
Current
and Frequency
AC
Current
is
adjustable
between
9|iA
and 2
A RMS
at
frequen-
cies
from
lOHz
to
5kHz.
Currents
from
2
A
to
1 1
A
are
available
(10Hz-20kHz).
Error7
indicates
an
invalid
Current/Frequency
selection.
FREQUENCY
MEMORY
This
facility
allows
storage
of
up
to five
user-selected frequen-
cies.
Once
stored,
each can
easily
be
retrieved
or
changed
from
the front panel.
They
are retained
until
power
is
removed
from
the
instrument or
reset
key
is
depressed.
3-7
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