Rohde & Schwarz ZPV - Manual Measurement

2.5.2
Manual
Measurement
2.5.2.
1
Vector
Measurement
Calibration
-
Select
B/A
LIN/REF
AUTO
on
the
ZFV.
Press
the
button
r
,
f
on
the
ZFV.
-
Adjust
the
nominal
crystal
frequency
on
the
signal
generator
and
select
the test
level.
-
Press
the
button
STOP
AUTORANGING
FREQ
on
the
ZFV.
The
lamp
lights
up.
-
Connect a
shorting
link
into
the
//
network
in
place
of the
crystal
and
press
button
LEVEL
REF
STORE .
The
lefthand
display
reads
out
1.00.
-
Connect a
resistor
into
the
"network,
the
resistance
of
which
corresponds
to
about
the
resonant
impedance
of
the
crystal
to
be
expected.
-
Press the
button
,
T REF
STORE
on
the
ZFV.
The
righthand
display
reads
out
0°.
Measurement
-
Connect
the
crystal,
into
the
li
network.
-
Now the
control
loop
pulls
the
crystal
to
the
exact
resonant
frequency.
The
righthand
display
of
the
ZFV
reads
out
0
.
The reso
nan
t
frequency
of
the
crystal
can
be
read
off
on
the
frequency
counter.
Hie
resonant
impedance
is
given
by
the
formula
Z
r
*
(
WA
-
1
)
*
25
M
where
B/A
is the
attenuation
read
out
on
the
lefthand
display.
2.
5. 2. 2
Measurement
Using
the
S-
parameter
Option
ZFV-B2
The
calibration
and
measurement
procedures
are
basically
the
same
as
for
the
vector
measurement
(section
2.1).
For
calibration,
the
S21,S12
AUTO
mode must
however
be
used.
The
S21,S12
AUTO
mode
corresponds
to
the
B/A
AUTO
LIN/REF.
mode.
R
38535
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28