HP 83480A User Manual

Probe Calibration
Probe calibration allows the instrument to establish the gain and oset of
specic probes that are connected to a channel of the instrument, and then
apply those factors to the calibration of that channel.
1. To perform a probe calibration, press:
4
Channel
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Calibrate
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Calibrate
Probe
F
or
active
probes
the instrument
can identify
through the
probe power
connector
,
like
the
HP
54701A,
the instrument
automatically adjusts
the
vertical
scale
factors
for
that
channel,
even if
a probe
calibration
is
not
performed.
F
or
passive
probes
or
non-identied
probes
,
the
instrument
adjusts
the
vertical
scale
factors
only
if
a
probe
calibration
is
performed.
2.
If
you
do
not
perform
a
probe
calibration
but
want
to
use
a
passive
probe
,
enter
the
attenuation
factor
by
pressing:
4
Channel
5
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
external
scale
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
Attenuation
Y
ou
can
use
the
probe
calibration
to
calibrate
any
network,
including probes
or cable assemblies. The instrument calibrates the voltage at the tip of the
probe or the cable input.
If the probe being calibrated has an attenuation factor that allows the
instrument to adjust the gain (in hardware) to produce even steps in the
vertical
scale
factors
, the
instrument
will
do
so
.
Typically
,
probes
have
standard
attenuation
factors
, such
as
divide
by
10,
divide
by
20,
or
divide
by
100.
If
the
probe
being
calibrated
has
an
unusual
attenuation,
like 3.75,
the instrument may have to adjust the vertical scale factors to an unusual
number, such as 3.75 V/div
.
4-7

HP 83480A Specifications

General

Brand	HP
Model	83480A
Category	Measuring Instruments
Language	English