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BRUEL & KJAER 2006 User Manual

BRUEL & KJAER 2006
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4.
Applications
General.
The
Heterodyne
Voltmeter
Type
2006
has
been
designed
for
selective
measure-
ments
with
a
high
degree
of
accuracy
and
sensitivity.
This
makes
it
a
useful
instrument
in
numerous
applications.
Furthermore
the
Heterodyne
Voltmeter
TypP
2006
under
special
circum-
stances
can
be
used
as
a
frequency
analyzer
and,
when
fitted
with
a
calibrat-
ed
antenna
(not
manufactured
by
Briiel
& Kjrer)
it
can
be
used
as
a
field
strength
meter
as
well.
The
latter
two
applications
are
a
little
more
involved
and
must
be
carried
out
with
great
care,
as
the
input
circuit
of
the
2006 is
untuned,
and
therefore
sensitive
to
image
frequency
signals,
signals
of
intermediate
frequency,
harmonics
of
the
intermediate
frequency
generated
by
the
detector,
and
also
harmonics
of
the
incoming
signal
generated
in
the
converter
transistor.
Because
the
input
is
untuned,
however,
the
mixer
circuit
could
be
designed
to
have
a
flat
frequency
response,
making
it
possible
to
calibrate
the
instru-
ment
at
one
single
frequency.
With
a
tuned
input,
which
will
always
have
a
different
"Q"
value
at
different
frequencies,
voltage
calibration
would
have
been
required
at
every
single
frequency,
and
thus
have
made
voltage
measure-
ments
much
more
difficult
and
time
consuming.
Antenna
Distribution
System.
Antenna
Distribution
Systems
for
rece1vmg
AM,
FM
as
well
as
TV
signals
are
very
easily
checked
by
means
of
the
Heterodyne
Voltmeter
Type
2006.
To
ensure
that
the
quality
of
the
system
is
good
enough
it
must
meet
certain
demands.
Among
others
can
be
mentioned:
1.
The
system
must
give
an
adequate
and,
within
certain
limits,
constant
signal.
2.
The
cross
talk
from
one
connection
plug
to
another
must
be
high.
3.
It
must
have
a
response
to
the
incoming
signal
which
satisfies
the
demand
of
quality.
4.
It
must
shield
from
local
fields
of
noise.
Re
1.
Fig.
4.1
shows
the
Hetel'odyne
Voltmeter
used
to
check
a
signal
voltage.
The
antenna
is
removed
and
a
signal
generator
is
connected
to
the
input
of
the
antenna
amplifier.
The
signal
generator
is
now
tuned
to
a
fre-
quency
in
the
range
of
the
antenna
system,
whereby
the
signal
output
voltage
at
every
connection
plug
of
the
system
can
very
easily
be
17

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BRUEL & KJAER 2006 Specifications

General IconGeneral
BrandBRUEL & KJAER
Model2006
CategoryMeasuring Instruments
LanguageEnglish

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