Model
8642A/B
Description
Procedures
Operation
AMPLITUDE SWEEP
The
Signal
Generator
can
amplitude
sweep
between
a
start
end
-point
and
a stop
end-point
in
linearly
spaced,
incremental
steps.
Sweep
step
size
is
automatically
selected based on
the
amplitude
span
(which
is
the
absolute
value
of
the
start
amplitude
minus
the
stop
amplitude)
and
the
sweep time.
Although
step
size
cannot
be
directly
set,
this
operating
instruction
provides
ways to
calculate
a sweep
time
to
ena
ble you to select a
particular
step size
or
number
of
steps.
Table
3-16.
Amplitude
Sweep
Operating
Characteristics
Electrical
Performance
Conditions
Characteristics
Limits
Output Amplitude Sweep
Rangel
20 dB logarithmic
20 dB linear (with Special Function 122)
Sweep Time 20 ms minimum
999s maximum
Accuracy
:;;1
dB
Over highest 10
dB
of
amplitude range
:;;3
dB
Over second highest
10
dB
of
amplitude range
X Axis Output
o
10
10 Vdc :;;10%
Z Axis Output TTL positive true For crt display blanking
during relrace
2
lAn
output amplitude sweep range
of
30dB
is possible. However, the lowest
10dB
of amplitude range is not specified.
2Buffer this output in order to use the Z-axis output with a plotter for pen lift.
Note:
Put
the
instrument
in
an
initialized
state
by selecting ( INSTR PRESET
).
How to
Turn
On
Amplitude
Sweep
Turn
on
amplitude
sweep by selecting
the
amplitude
sweep mode,
the
sweep
time,
and
the
start
and
stop
amplitude
values (procedures
for
selecting these
parameters
are
described in
this
instruction).
Upon
selection
of
amplitude
sweep,
the
two
sweep
end
-points
are
displayed as
the
start
amplitude
and
the
stop
amplitude.
These
end-points
will be
shown
as AA.OFF
and
AB.OFF
until
sweep
values
are
entered.
(AA
and
AB
are
the
HP-IB
codes
for
start
amplitude
and
stop
amplitude,
respectively.)
Note
that
if
the
sweep mode has not been selected since
the
last
time
Instrument
Preset has been selected,
auto
sweep
is
automatically
selected
and
causes
the
Signal
Generator
to begin sweeping
immediately
after
end-points
are set. (The
SWPNG
annunciator
indicates
that
a sweep
is
occurring.)
3-83
To Next Page
Loading...
Need help?
General
