Modifying
IF
and
A
veraging
Bandwidths
The
EMI
receiver
oers
measurment
(CISPR)
and
diagnostic
IF
bandwidths
as
well
as
post-detection
averaging
bandwidths
.
The
receiver
defaults
to
the
measurement
bandwidth
appropriate
for
the
current
center
frequency
.
7.
T
o
select
a
dierent
bandwidth,
press:
4
BW
5
8.
Each
measurement
bandwidth
has
its
own
softkey
.
T
o
select
a
specic
measurement
bandwidth,
press
the
appropriate
key
.
T
o
change
to
a
diagnostic
IF
bandwidth,
press:
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
IF
BW
AUTO
MAN
MAN
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
100
4
kHz
5
9.
Bandwidths
may
be
selected
by
entering
the
desired
value
using
the
numeric
keypad
followed
by
the
appropriate
terminator
,
or
by
using
the
step
keys
or
knob
.
T
o
return
the
receiver
to
the
default
setting,
press:
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
IF
BW
AUTO
MAN
A
UTO
10.
The
receiver
selects
an
averaging
bandwidth
appropriate
for
the
selected
IF
bandwidth.
T
o
select
a
dierent
averaging
bandwidth,
press:
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
AVG
BW
AUTO
MAN
MAN
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
100
4
kHz
5
11.
T
o
set
the
receiver
to
the
default
setting,
press:
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
AVG
BW
AUTO
MAN
A
UTO
Selecting
the
A
ctive
Detector
The
EMI
receiver
can
scan
any
one
of
the
three
available
detectors
.
The
currently
active
detector
is
indicated
onscreen
in
the
upper
right-hand
corner
as
the
\ACTV
DET ."
Refer
to
Figure
3-1.
The
default
detector
of
the
receiver
is
the
peak
detector
.
The
peak
detector
scans
the
measured
spectrum
faster
than
the
other
built-in
detectors
because
of
its
short
charge
and
discharge
time
constants
.
T
o
scan
with
the
built-in
quasi-peak
or
average
detectors
,
press
the
4
QUASI-PEAK
5
or
4
A
VGERA
GE
5
detector
keys
located
in
the
upper
portion
of
the
front
panel.
When
using
these
detectors
,
the
receiver
scans
at
a
much
slower
rate
due
to
longer
time
constants
.
Scan
times
are
automatically
selected
to
match
the
increased
charge
and
discharge
times
.
When
making
diagnostic
measurements
,
it
is
possible
to
scan
these
slower
detectors
at
a
faster
rate
by
reducing
the
sweeptime
.
The
receiver
will
indicate
this
condition
by
displaying
a
\MEAS
UNCAL "
error
message
,
as
shown
in
Figure
3-1.
Note
When
using
the
receiver
RF
section
by
itself,
refer
to
\Receiver
RF
Section
Annotation
"
in
Chapter
1
of
this
manual.
3-4
Making
Compliance
Measurements