Rohde & Schwarz URV5-Z4 - Page 44

3.542
Checking
the
Rated
sfliflcauons
3.5.3.1
Checking
the
Linearity
In
the
following
test
the
output
voltage
of
an
AC
calibrator
is
measured
with
the
aid
of
the
100-V
insertion
unit
from
2
mv
to
10
V
at
1
MHz
and
with
100
V
at
a
frequency
of
200
kHz
(Fig.
3-2). The relatively low frequency of 200 kHz in the last measure-
ment causes only a slight deterioration of the measuring accuracy,
since the lower cutoff frequency of all AC probes strongly decrea-
ses
with
increasing
voltage.
Although
the
1oo-v
insertion
unit
is
less
sensitive
by
a
factor
of
10
than
the
RF
probe
and
the
10-V
insertion
unit,
care
should
be
taken
when
setting
up
the
test
set
that
broadband
interferences
giglzngt1invalidate
the
measurement
results
(see
section
i
O
.o
o
)0
Settings
on
URVS:
Channel
A
(B)
URVS-z4
Readout
v
Filter
F2
Autorange
on
Settings
on
AC
calibrator:
2
mv
10
Hz
with
this
calibrator
setting,
zero
adjustment
is
triggered
if
the
insertion
unit
is
connected.
Due
to
the
low
frequency
the
voltage
of
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
1
MHz
and
the
output
voltage
measured
at
the
following
values:
2
mV;
30
mV;
100
mV;
0.3
V;
1
V;
3
V:
10
V
The
measurement
is
then
carried
out
at
100
v
and
200
kHz.
The
permissible
tolerances
are
entered
in
the
performance
test
re-
port.
Please
carry
out
the
measurements
in
the
stated
sequence.
After
measurement
of
high
voltages
the
insertion
unit
requires
a
certain recovery time before low levels can be measured again.
394.8010.02
3.24
3-2
3.5.2
Checking the Raten
Specifications
3.5.2.1
Checkinq the Linearíty
In the following Test the Output voltage of an AC calibrator es
measured Voith the ad of the 100-V Insertion Unit fror 2 mV to
10 v at 1 MH: and Voith 100 v at a frequency of 200 kHz (Fig.
3-2) . The relatively low frequency of 200 kHz in the last measure-
ment causes only a slight deterioration of the measuring accuracy,
since the lower cutoff frequency of all AC probes~ strongly decrea-
ses Voith increasing voltage.
Although the 100-V Insertion Unit is less sensitive by a factor on
10 than the RF probe and the 10-V Insertion Unit, Care should be
taken when Setting up the test Set that broadband interferences
will not
invalidate the measurement resultat (See section
2.3.2;2.1).
settings on URV5:
Channel A
Readout
Filter
Autor arge
(B)
URV5-Z4
v
F2
on
Settings on
AC calibrator:
2 my
10 Hz
Voith this calibrator Setting, zero adjustment is triggered if the
Insertion Unit is connected. Due to the low frequency the voltage
of 2 mV is not considered; only the residual interfering voltage
is measured and eliminated like an Offset error.
2 my; 30 my; 100 my; 0.3 V: 1 V; 3 V: 10 V
After the zero adjustment the frequency is Set MI-lz the
Output voltage measured at the following Values:
The measurement is then carried out at 100 v and 200 kHz. The
permissible tolerances are entered in the performance test re-
por t. please carry out the measurements in the stated sequenz.
After measurement of high voltages the Insertion Unit requires a
cer tain recovery time before los levels can be measured again.
to 1 and
394.8010.02
3.24
B-2