Rohde & Schwarz ZPV - Indication of Reference Value; Disconnecting the Amplitude Autoranging Facility; Quasi-Analog Indication; Stabilization of Test Results

Indication
of
Reference
Value
2 .
3.5
Pressing
button
RECALL
REF.
1£
interrupts
the
test
cycle
and
causes the
corresponding
reference
value
to
be
displayed.
When
button
22.
is
lit,
this
mode
i.s
switched
on.
Another
push
of
button
19
makes
go
out,
the
test
cycle
is
continued
and
the
test
results
appear
in the
readout.
2
.
3.6
Stabilization
of
Test
Results
By
pressing
button
FILTER
20
an
electronic
filter
is
connected
for
stabilizing
the
test
results.
This
adaptive
filter
proves
especially
useful
for
low-
level
and
noisy
signals.
Another
push
of
button
20
disabl.es
the
filter
and
the
luminous
button is
extinguished.
2.3.7
Disconnecting
the
Autoranging
Facilities
2.3.7.
1
Disconnecting
the
Amplitude
Autoranging
Facility
For
the
vector
measurement
modes
in
channel
A
and
channel
B it
may
be
necessary
to
disconnect
the
amplitude
autoranging
facility
of
the
amplifier,
which
uses
10
-dB
steps,
lb this
effect,
button
AMPL.
STOP
AUTORANGING
2
is
pressed
and
the
status
indication
4
lights
up.
Another
push of
button
3
causes
the
luminous
indication
4 to
be
extinguished
and
amplitude
autoranging
is
connected
again.
In
all other
operating
modes
the
amplitude
autoranging
facility
of
the
amplifier
cannot
be
switched
off.
Button
2
then
only
affects
the
recorder
outputs
KEC/l
V.
2.
3
.
7. 2
Disconnecting
the
Frequency
Autoranging
Facility
If
only
one
frequency
range of
the
tuner
is
used,
the
frequency
autoranging
facility
can
be
disconnected
to
increase
the
measuring
rate
and
the
corre-
sponding
range can
be set
by
hand.
To
'tills
effect
button
FREQ.
STOP
AUTORANGING
2
is
pressed
and the
status
indication
6 lights
up.
After
pushing
button
5
once
again,
the
luminous
indication
6
goes
out
and
frequency
autoranging
is
connected
again.
2
.
3.8
Quasi
-analog
Indication
The
quasi-analog
luminous
spot
indication
8
is
associated
with
the
digital
readout
7
and the
quasi-analog
luminous
spot
indication
12
wi th
the
digital
readout
12.
Although
these
linear
luminous
spot
indicators
feature
no
absolute
accui’acy,
they
facilitate
the
recognition
of
a
tendency
towards
a
maximum
or
a
minimum
value
and
thus
prove
particularly
useful
for
alignment
R
36737
-
16