Generally,
the
following
instructions
and
restrictions
must
be
observed
for
this
measurement
mode:
Peak-value
meter
Prob:
Diode
characteristic
Fig.
2-7
Equivalent
circuit
diagram
for
peak-value
measurement
As
shown
in
Pig.
2-7,
the
internal
resistance
Rin
of
the
measu-
ring
head
diode
forms
in
conjuction
with
the
charging
capacitor
C
a
lowpass
filter.
with
a
level—dependent
frequency
response
caused
by
Rin-
Within
the
square-law
range
of
the
diode
charac-
teristic,
the
limit
frequency
(3
dB)
is
approx.
800
Hz
for
both
insertion
units
(10
V,
100
V)
and
the
RF
probe.
Since
Rin
is
also
temperature-dependent,
this
value
is
only
valid
at
room
tem-
perature
(Rin
-
Ro
(zero-point
resistance)
~200
kn).
ht
higher
levels,
measurements
are
possible
with
modulation
and
intermodulation
frequencies
up
to
the
kHz
range.
Definition
of
PEAK
(PEP)
measurement
with
respect
to
general
measuring
head
characteristics
1.
Unmodulated
RP
voltages:
with
unmodulated
RF
voltages
there
are
no
or
only
slight
dif-
ferences
in
the
result
from
a
"normal“
measurement
and
a
PEAK
(PEP)
measurement.
Minor
deviations
are
due
to
a
residual
ripple
of
the
RE
voltage.
Basic
measuring
head
characteristics
(see
Section
2.3.2.2)
are
as
follows:
<
30
mV
(300
mV)
rms-responding
meas.
'for
non-sinewave
>
1
V
(
10
V)
peak-responding
meas.
‘voltages
The
values
given
in
parenthesis
apply
to
100-V
insertion
units.
394.8010.02
2.27
3-3
Generally,
the following instructions
observed for this measurement
mode:
and
restríctíons
must
be
•
ı
z'
I
l
I
I
.
I
\
i
ı
T-
r i
!
ı
I
Park-value
Meter
Diode
characteristic
Probe
Fig. 2-7 Equívalent circuit díagram for peak-value
measurement
As show in Fig. 2-7, the Internal Resistance Rin of the
measu-
ring
head
diode forms in
conjuction
Voith
the
charging
capacitor
c
a
lowpass
Filter,
Voith
a
level-dependent
frequency
response
caused
by
Rin.
mithin
the
Square-law
range
of the diode
charac-
teristic, the limit frequency
(3
dB) is approx.
800
Hz for
both
Insertion
Units
(10
V,
100
V) and the RF
probe.
Since Rin is
also
temperature-dependent,
this Value is only valid at
room
tem-
perature
(Rin ı
R0
(zero-point
resistance)
-200 kN).
At
higher
levels,
measurements
are
possible
Voith
modulator
and
intermodulatíon
frequencies
up so the kHz
range.
1.
Definition
of
measuring
Head
PBAK
(PEP)
measurement
Voith
respect
so
General
characteristics
Unmodulated
RP
voltagesz
With
unmodulated
RF voltages there are no er only
slight
dif-
ferences
in the
result
fror a
'normal'
measurement
and a PBAK
(PEP)
measurement.
Minor
deviatíons
are due to a
residual
rapple
of the RF
voltage.
Basic
measuring
head
characteristics
(See
Section
2.3.2.2)
are as follows:
<
>
30
1
mV
v
(300
my)
(
10
v›
ums-responding
meas.
peak-responding
meas.
for
non-sinewave
voltages
The Values given in parenthesis apply to
100-v
insertíon
Units.
394.8010.02
2.27
E-3
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