BDS
Cal
Cart
22
Averaging
The
BDS
Cal
Cart
Receiver
offers
two
types
of
data
averaging
for
Standard
Tracking
Mode:
Fixed
(Simple)
or
Moving.
Both
averaging
modes
will
reduce
signal
‐
to
‐
noise
ratio
in
a
measurement.
Averaging
is
performed
in
the
receiver.
Figure 14 Averaging Dialog
A
simple
average
will
take
a
number
of
measurements
and
then
compute
and
report
the
average
value
after
the
number
of
measurements
has
been
sampled.
This
averaging
mode
will
increase
the
data
update
rate
by
the
number
of
averages
requested.
Example
‐
If
the
data
update
rate
for
1
measurement
dataset
is
10ms,
then
it
will
take
about
40ms
to
average
4
measurements
and
produce
the
result.
A
user
can
average
up
to
16
measurements
using
Simple
averaging.
The
Moving
average
mode
averages
data
over
time
using
a
sliding
filter
window.
The
average
window
size
is
specified
as
a
power
of
2
ranging
from
2
to
128
measurements.
The
difference
between
Moving
and
Simple
averaging
is
that
the
moving
average
doesn’t
wait
for
the
buffer
to
fill
before
computing
a
result,
it
simply
adds
a
new
measurement
to
the
buffer
and
computes
and
reports
the
result.
It
removes
the
oldest
measurement
if
the
buffer
is
full
before
adding
the
new
measurement.
This
provides
little
impact
the
data
update
rate,
depending
on
the
measurement
set.
V/I
Noise
Threshold
parameter
(Moving
Average
Mode)
is
used
to
determine
when
to
clear
the
filter
buffer
–
when
the
signal
(voltage
or
current)
exceeds
this
threshold
the
buffer
is
cleared
to
provide
a
fast
response
to
the
measurement
system.
