Rohde & Schwarz URV5-Z4 - Page 56

4.1.5.1.1
'
20-]40-63
Dividers
The
dividers
that
can
be
plugged
onto
the
probe
tip
form
in
conjunction
with
the
input
capacitance
of
the
probe
a
capacitive
divider.
Due
to
the
greater
base
capacitance
the
40-63
div1der
‘can
already
be
used
at
500
kHz,
whereas
the
20-dB
divider
can
only
be
used
at
1
MHz
and
above.
The
dividers
are
preferrably
used
for
measuring
high
voltages
or
for
measurements
with
low
load
capacitance.
The
input
capacitance
of
the
probe
with
40-d3
divider
is
0.5
p?
only,
with
20-dB
divider
it
is
1
pP.
(this
is
without
BNC
adapter).
4.1.5.1.2
so:/7s-n
Adapters
.With
the
aid
of
the
two
adapters
and
the
RP
probe,
low-reflection
RP
voltage
measurements
can
be
carried
out
in
50-/75-n
systems.
The
adapters
contain
a
so-/75-n
termination
which
is
connected
to
the
inner
and
outer
conductor
and
to
which
the
probe
tip
is
con-
nected
via
matching
pads.
The
reflection
coefficients
specified
for
the
adapters
are
only
valid
with
the
probe
inserted.
4.1.5.2
10-V
Insertion
Unit
unvs-zz
This
measuring
head
is
of
similar
design
as
the
RF
probe.
It
mainly
differs
in
the
greater
frequency
range.
The
lower
measure-
ment
limit
is
reduced
to
approx.
9
kHz
by
the
coupling
capaci-
tance
of
10
nP.
4.1.5.3
100-V
Insertion
Units
URVS—z4
In
these
measuring
heads
a
capacitive
divider
designed
as
tubular
divider
is
connected
ahead
of
the
rectifier.
Due
to
the
low
base
capacitance resulting from the circuit design, the lower frequen-
cy limit is higher than for the probe and 1o-v insertion unit.
The
DC
probe
contains
a
9-MR
precision
resistor
as
input
resi—
stance
for
the
inverting
amplifier
(20).
394.8010.02
4.8
3-3
4.1.5.1 .1
20-/40-dB Dividerı
The dividers
trat Can be plugged onto the probe
conjunction Voith the Input
capacitance of the probe
divider. Due to the greater base
can already be used at 500 kHz,
whereas
only be used at 1 MH: and above. The
used for measuring high voltages er for
load capacitance.
divider is 0.s pF only, Voith 20-dB divider it is 1
without BNC adapter) .
tip Form in
acapacitive
capacitance
the 40-dB divider
the 20-dB dívider
Can
dividers are preferrably
measurements Voith low
The Input capacitance on the probe Voith 40-dB
pF. (this is
4.1
.s.ı.2
so-/75-a Adapter:
-With
the
Eid of the toto adapters und the RF probe, low-reflection
RF voltage
measurements can be carried out in 50-/75-9 Systems.
The
adapters contain a 5o-/7s-n termination which is connected to
the
innen
and
guter
conductor and to which the probe tip is con-
nected via matching pads. The reflection
coefficients
for the adapters are only valid
Voith the probe inserted.
specified
4.1-.S.2
10-V Insertion Unit URVS-22
This measuring head is of similar design as the RF probe. It
mainly differs in the greater frequency range. The loser measure-
ment limit is reduced to approx. 9 kHz by the coupling capaci-
tance of 10 nF.
4.1.5.3
100-V Insertion Units URVS-24
In These measuring heads a capacitive divider designed As tubular
divider is connected ahead of the rectifier. Due to tue low base
capacitance resulting fror the circuit design, the lower frequen-
cy limit is high er than for the probe and 10-v Insertion Unit.
4.1.5.4 DC Probe 0RV5-21
The DC
stance
probe container a
9-MR p.recísíon resístor
for the invertíng amplifıer (20).
as Input resi-
394.8010.02
4.8
B-3