CALIBRATION
(cant)
The
following
operations generate
new
frequency calibration constants, regardless
of
calibration measurement disable:
-CAL
FREQ
(BLUE
shift
PRESET)
(does
not
enable calibration measurements)
-"
CF'" (does
not
enable calibration measurements)
Note: The BLUE shifted
function
of
the
PRESET
key is
not
marked on
the
front
panel. Sweep and ARB
must
be also be OFF.
Calibration Disable,
E04
The CAL OFF (BLUE
shift
STO) key or the
"CD"
command
from
the
HP-1B,
disables all amplitude and frequency calibration maasurements. While calibration
measurements are disabled,
the
3314A
will
use
the
calibration constants previous-
ly computed and display
IJ'
E04"
(Calibration
Not
Performed). Since a complete
calibration is
the
only
calibration
type
that
generates all
29
constants,
it
is impor-
tant
to
do a CAL
ALL
(BLUE
shift
RCL) or
"CA",
prior to calibration disable and
at
regular intervals there after. A
CAL
ALL should be performed every
24
hours or
whenever
the
temperature changes more than
5°C.
The primary advantage
for
using calibration disable is
the
time
saved
when
operating via the HP-IB. Note,
when
operating via
the
HP-IB
with
calibration disabl-
ed, set Display Errors
OFF"
DEO". If Display Errors is ON, E04
will
be displayed
for
1/2
second every
time
a calibration measurement is
not
performed. During
the
time
E04
is displayed, all
3314A
HP-IB functions are halted.
Calibration Enable
Power
ON, the
PRESET
key, "'PR" HP-IB command, the CAL ALL (BLUE
shift
RCl)
key and
the
"CE"
HP-IB command, enable amplitude and frequency calibration
measurements. All
of
these operations cause the execution
of
a complete calibra-
tion,
except'"
CE" .
50
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