Rohde & Schwarz URV5-Z4 - Page 22

with
test
voltages
above
1
V
(above
10
V
using
20-dB
divider
or
100-V
insertion
unit,
above
100
V
using
40-dB
divider),
the
diode
detector
acts
a a
peak-responding
rectifier.
Since
a
full-wave
rectifier
is
incorporated
in
the
probes,
the
peak-
to-peak
value
is
unasured
but
the
value
V
2V?
is
indica-
ted.
For
sinewave
voltages
this
correSponds
o
readout
of
the
rms value.
Fig. 2-4 shows the maximum permissible crest factor for a
weighting error of the peak-responding rectifier of -2% and
-5§
as
a
function
of
the
magnitude
of
the
test
voltage.
For
peak-responding
measurement
see
also
section
2.3.6:
PEAK
(PEP)
Measurement.
The
lower
cutoff
frequency
(3
dB)
of
the
RF
probes
is
tem-
perature-dependent,
the
value
specified
for
the
individual
probes
being
valid
in
the
temperature
range
+18°C
to
+28°C.
In
addition,
it
can
be
assumed
that
as
a
rule
of
thumb
this
cut-
off
frequency
is
doubled
for
every
10
K
temperature
rise
and
halved
for
every
10
K
temperature
drop.
After
large
changes
of
the
level,
the
URVS
exhibits
a
slight
delay
caused
by
residual
charge
effects.
This
longer
settling
time
must
also
be
taken
into
account.
All
probes
of
the
URVS
are
referred
to
safety
ground.
Measurements
at
low
voltages
(see
also
section
3:
Maintenance)
a)
The
URVS
features
broadband
RF
measurements.
If
low
volt-
ages
are
to
be
measured,
care
must
therefore
be
taken
of
(RF) interfering signals as may for instance occur with
microprocessor-controlled AC calibrators or AF generators.
The
useful
signal
may
partly
be
superimposed
by
a
noise
spectrum (a few MHz) from the microprocessor clock, which
does not cause any interference in the AP range (a 200
kHz),
but
invalidates
the
result
of
the
broadband
measure-
ment with the URVS.
Therefore
it
must
be
ensured
that
there
is
no
such
inter-
ference
or
that
it
is
considered
in
the
evaluation
of
the
measurement result.
394.8010.02
2.12
3-1
Voith test voltages above 1 v (above
10 v u sing 20-dB divider
er 100-v Insertion Unit, above 100 v
u sing 40-dB divider), the
diode detector acts a a
peak-responding rectifier. Since a
full-wave rectifier is- incorporated in the
peak-
to-peak Value is measured but the Value /zvë' is indica-
ted. For sinewave voltages this
corresponds readout of the
ums Value.
the probes,
Vp
5°
Fig. 2-4 Shows the maximum permissible crest factor for a
weighting error of the peak-respondíng rectífier of -2% and
-5% as a function of the magnítude of the test voltage.
For
peak-responding measurement See also section 2.3.6:
PEAK (PEP)
Measurement.
2.
The lower cutoff
frequency (3 dB) of the RF probes is tem-
perature-dependent, the Value specified for the individual
probes berg valid in the temperature range +18°C to +28°C. In
Can be assumed that as a rufe of thumb this cut-
is doubled for every 10 K temperature rise and
for every 10 K temperature drop.
addition, it
off
frequency
halved
3. After large changes of the level, the URV5 exhíbits a slight
delays caused by residual Charge effects. This langer settling
time must also be taken into account.
4. A11 probes of the ORVS are referred so safety ground.
5.
Measurements at los voltages
(See also section 3: Maintenance)
at
The URV5 features broadband RF measurements. If low volt-
ages are to be measured, Care must therefore be taken of
(RF) interfering Signals as may for instanz occur Voith
microprocessor-controlled AC calibrators er AF generators.
Signal may superimposed by a rose
(a few Milz) clock, which
not cause any in the AF range (+ 200
but invalidates result of the broadband measure-
with the URV5.
The useful
spectrum
does
kHz) ı
ment
par tly be
fror the ınicroprocessor
interference
the
Therefore it must be ensured that there
Terence er that it is considered in the
measurement result.
is no such
evaluatıon
inter-
of the
394.8010.02
2.12 E-1