(
CALIBRATION
The
3314A
has amplitude and
frequency
calibration routines
to
insure
that
its
per-
formance
equals or exceeds
the
specifications
listed in Table 1-1 , Specifications in
the
Service Manual.
IOTE
Specifications
apply
within
24
hours
and
5°C
of
a CAL
ALL
performed
after
a
30
minute
initial
warm-up.
A
3314A
calibration loads
new
calibration
constants
into
the
internal
circu
itry
to
insure
that
the
3314A
meets
its
specifications. In
most
cases,
this
requires a
measurement
routine
to
generate
new
data. In cases
where
accurate
correction
data
is already available,
the
measurement cycle is
not
performed. Calibration
Disable and Enable refer
to
the
measurement cycle,
not
the
act
of
calibration.
CAlibrate
All
A
CAL
ALL
takes - 2 seconds
to
generate
29
amplitude
and
frequency
calibration
constants.
The
following
operations
cause
the
331
4A
to
completely
calibrate
itself
whether
calibration measurements have been disabled or
not:
-Power
ON (also enables calibration measurements)
-PRESET or
..PR" (also enables calibration measurementsl
-CAL
(BLUE
shift
RCL) (also enables calibration measurements)
-"
CA"
(does
not
enable calibration measurements)
The
main signal
output
will
be < 1
5mVp
-p
at
various frequencies,
the
sync
output
will
be
active
and
IF
CAL"
will
be displayed during all calibrations. The
3314A's
measurement
routine is
modified
slightly
during
sweeps
to
insure
accuracy
.
Amplitude
Calibration
Amplitude
calibration occurs
whenever
the
function
changes. During an
amplitude
calibration measurement,
the
sync
output
is
active
(output
is a
10kHz,
TTL
level,
squarewave)
.
ALL <
200ms/funct
lon < 16mVp-p at
10kH
z
48
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