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BRUEL & KJAER 2006 User Manual

BRUEL & KJAER 2006
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25
dB
to
be
recorded.
To
have
the
fieldstrength
in
V/m
the
antenna
must
be
calibrated.
Directional Characteristics
of
Antennas.
With
a
set-up
as
shown
in
Fig. 4.8
the
directional
characteristics
of
antennas
can
be
measured.
For
this
type
of
measurement
polar
diagram
charts
QP
5102
should
be
used
on
the
Level
Recorder.
The
antenna
is
mounted
on
the
turn-
able
Type
3921,
which
is
synchronized
with
the
Recorder
(see
the
instruction
manual
for
the
Level
Recorder).
Fig.
4.9
shows
the
directional
characteristic
of
a
simple
dipole.
Here
too
the
antenna
must
be
calibrated
if
the
field-
strength
is
desired
in
V /m.
Fig. 4.9. Directional characteristic
of
antenna.
Control
of
Signal Generator.
Correction Curve.
The
high
accuracy
of
the
Heterodyne
Voltmeter
makes
it
possible
to
use
it
to
check
the
output
voltage
of
a
signal
Generator
as
shown
in
Fig. 4.10.
However,
it
is
very
important
that
the
matching
impedance
is
correct
and
the
signal
Generator
must
be
loaded
with
its
matching
impedance.
23

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BRUEL & KJAER 2006 Specifications

General IconGeneral
BrandBRUEL & KJAER
Model2006
CategoryMeasuring Instruments
LanguageEnglish

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