Rohde & Schwarz URV5-Z4 - Page 34

Settings
on
AC
calibrator:
0.2
mV
10
Hz
With
this
calibrator
setting,
zero
adjustment
is
triggered
if
the
RF
probe
is
connected.
Due
to
the
low
frequency,
the
voltage
of
0.2
mv
is
not
considered:
only
the
residual
interfering
voltage
is
measured
and
eliminated
like
an
offset
error.
After
the
zero
adjustment
the
frequency
is
set
to
200
kHz
and
the
output voltage measured at the following values:
0.2 mV: 3 mV; 10 mV; 30 mV; 100 mV; 0.3 V; 1 V; 3 V; 10 V
The permissible tolerances are specified in the performance test
report.
Please
carry
out
the
measurements
in
the
stated
se-
quence.
After
measurement
of
high
voltages
the
RF
probe
requires
a
certain
recovery
time
before
low
levels
can
be
measured
again.
3.2.2.2
Checking
the
Input
Capacitance
The
input
capacitance
of
the
RF
probe
has
a
considerable
in-
fluence
on
the
dividing
error
if
a
20-/40-dB
divider
is
used.
To
check
the
input
capacitance,
it
is
recommended
to
check
the
di-
v1sion
ratio
in
conjunction
with
a
20-dB
divider.
The
adjustment
error
of
the
divider
is
so
minimal
that
it
can
be
neglected
with
reSpect
to
the
error
caused
by“the
input
capacitance.
The
output
signal
of
a
sinewave
generator
is
measured
first
with-
out
and
then
with
20-dB
divider
(Fig.
3-4).
The
permissible
divi-
sion
ratio
is
shown
in
the
performance
test
report.
The
output
voltage
of
the
sinewave
generator
is
adjusted
to
approximately
1
Vrms/10
MHz.
Care
should
be
taken
that
the
distortion
does
not
exceed
1%
since
otherwise
weighting
errors
in
the
same
order
of
magnitude
will
have
to
be
expected.
Settings
on
URVS:
Channel
A
(B)
URVS-z7
Readout V (x/REF)
Filter F2
Autorange on
The measurement is first to be carried out without divider, the
measured value to be stored as reference value and the readout
then be switched to x/REF for the measurement with divider.
-394.so1o.02
3.14
3-2
Settings on
AC calibratorz
0. ~2 mV
10 Hz
Wich this calibrator Setting, zero adjustment is triggered if the
RF probe is connected. Due to the low frequency,
0.2 mV is not considered; only the residual
is measured und eliminated like an Offset error.
the voltage of
interferíng voltage
After the Zero adjustment the frequency is Set to 200 kHz and the
Output voltage measured at the following Values:
0.2 my; 3 my; 10 my; 30 my; 100 my; 0.3 V: 1 V; 3 V; 10 V
The permissible
tolerances are specified in the performance Test
Report. Please carry out the measurements in the stated se-
quence. After
measurement of high voltages the RF probe requires
a certain recovery time before los levels can be measured again.
3.2.2.2
Checkinq the Input Capacítance
The Input capacitance of the RF probe has a considerable in-
fluence on the dividing error if a 20-/40-dB divider is used. To
Check the Input capacitance, it is recommended to Check the di-
vision ratio in conjunction Voith a 20-dB divider. The adjustment
error of the divider is so minimal that it can be neglected Voith
respect to the error caused bi* the Input capacitance.
The Output Signal of a sinewave generator is measured First with-
out and then Voith .20-dB divider (Fig. 3-4). The permissible
divi-
sion ratio is show in the performance test report. The Output
voltage of the sinewave generator is adjusted to approximately
1 Vn-„5/10 MHz. Care should be taken that the distortion does
not exceed 1% since otherwise weighting errors in the same Order
of magnitude will have to be expected.
Settings on URV5:
Channel A
Readout
Filter
Autor arge
(B)
URV5-Z7
V (X/REF)
F2
on
The measurement is first to be carried out without divider, the
measured Value to be stored as reference Value and the readout
then be switched to X/REF for the measurement Voith divider.
~394.8010.02
3.14
E-2