HP 8753D - Page 275

Active
Channel K
eys
The
analyzer
has
two
digital channels
for independent
measurements.
Two dierent
sets
of
data
can
be
measured
simultaneously
, for
example,
the reection
and transmission
characteristics
of
a
device
,
or
one measurement
with two
dierent frequency
spans.
The
analyzer
can
separately
,
or
simultaneously
, show
the data.
Figure 6-3.
Active
Channel K
eys
The 4
CHAN
1
5 and
4
CHAN
2
5 keys
shown in
Figure 6-3
allow
you
to
select
the
\active
channel." The
front panel
keys
currently
allow
you
to
control
the
active
channel.
All
of
the
channel-specic
functions
that you
select
apply
to
the
active
channel.
The
current
active
channel
is
indicated
by
an
amber
LED
adjacent
to the
corresponding channel
key.
Dual
Channel
The
analyzer
has
dual
channel
capability
,
so
that
you can
view both
the
active
and
inactive
channel
traces
,
either
overlaid
or
on
separate
graticules
one above
the other
(split
display).
The
dual
channel
and
split
display
features
are
available
in
the
display menus
.
Refer
to
\Display
Menu"
later
in
this
chapter
for
illustrations
and
descriptions
of
the dierent
display
capabilities
.
Uncoupling
Stimulus
V
alues
Between Channels
Y
ou
can
uncouple
the stimulus
values between
the
two
display
channels
by
pressing
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
COUPLED
CH
OFF
.
This
allows
you
to
assign dierent
stimulus values
for each
channel; it's
almost
like having
the use
of a
second
analyzer
.
The
coupling
and
uncoupling
of
the
stimulus
values
for the
two channels
are independent
of
the
display
and
marker
functions
.
Refer
to
\Channel
Stimulus Coupling"
later in
this chapter
for
a
listing
of
the
stimulus
parameters
associated
with the
coupled channel
mode.
Coupled
Markers
Measurement markers can have the same stimulus values (coupled) for the two channels
,or
they
can be uncoupled for independent control in each channel. Refer to \Markers" later in
this
chapter for more information about markers
.
6-8 Application and Operation Concepts