LAB 9: Final System and Circuit Simulations

LAB 9: Final System and Circuit Simulations

ADS Fundamentals – 2009
LAB 9: Final System and Circuit Simulations
Overview
–
This
last
lab
exercise
brings
together
all
the
circuits
built
during
the
course:
the
amplifier
and
filters.
They
replace
the
behavioral
system
models
used
in
the
earlier
exercise.
OBJECTIVES
•
Create
a
sub‐circuit
for
the
1900
MHz
amplifier
for
use
in
the
system.
•
Use
the
Smart
Simulation
Wizard.
•
Set
up
and
run
a
CE
simulation
using
a
CDMA
source.
•
Simulate
ACPR
and
power
specs
using
an
example
data
display.
•
Program
Marker
sliders
to
customize
data
displays.
•
OPTIONAL
‐
Co‐simulations
with
minimal
instructions.
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
TABLE OF CONTENTS
1. Create the final AMP_1900 sub-circuit for the library........................................... 3
2. Simulate AMP_1900 with the Smart Simulation Wizard. ..................................... 4
3. Create the final HB swept LO schematic and equations...................................... 6
4. Final HB simulation: 2 tones with swept LO power and noise. ............................ 8
5. Plot the data: NF, Conv Gain, dbm_out, and IF_gain. ....................................... 10
6. Final Envelope simulation: CDMA source. ......................................................... 11
7. Use an Example DDS to plot ACPR and Power for your circuit......................... 13
8. Plot the spectrum using a programmed marker slider. ...................................... 14
9. CDMA Envelope Simulation with Frequency Sweep ......................................... 17
10. OPTIONAL - Co-simulation of the behavioral RF system.................................. 22
9‐2
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
PROCEDURE
1. Create
the
final
AMP_1900
sub­circuit
for
the
library.
a. Save
the
last
amplifier
circuit
envelope
design
(ckt_env_gsm)
as:
AMP_1900.
This
schematic
will
become
the
final
amplifier
design
to
be
used
in
your
system
project
you
created
earlier
in
the
course.
b. As
shown
here,
delete
all
simulation
components,
variables,
source,
etc.
Set
Vdc
=
5V.
Set
File
>
Design
Parameters
for
Component
Instance
Name:
AMP_1900
and
Symbol
Name:
SYM_Amplifier.
Also,
put
port
connectors
1
and
2
on
the
input
and
output.
Check
the
circuit
and
then
save
and
close
the
AMP_1900
design.
File
>
Design
Parameters
/
General
Tab
c. Go
to
the
ADS
Main
window
and
open
/
change
to
the
system_prj.
This
is
where
you
have
the
rf_sys
design
and
the
filters.
d. In
system_prj
open
a
new
schematic
window.
Then
click
File
>
Copy
Design.
As
shown
for
From
Design,
click
Browse
and
click
to
the
amp_1900
project
/
networks
and
select
AMP_1900.
In
the
To
Path,
click
Working
Directory
and
click
OK
‐
the
file
and
its
hierarchy
(bjt_pkg)
will
be
copied
into
your
system
project.
Copying
from
a
different
project.
©
Copyright
Agilent
Technologies
2009
9‐3
Lab 9: Final System and Circuit Simulation
2. Simulate
AMP_1900
with
the
Smart
Simulation
Wizard.
The
wizard
has
many
standard
simulation
setups.
Although
this
wizard
does
not
take
the
place
of
knowing
how
to
use
ADS
on
your
own,
it
is
valuable.
In
these
next
steps,
you
will
use
it
to
simulate
the
AMP_1900
where
frequency
is
swept.
a. In
the
system
_prj,
open
a
new
schematic
and
click
the
Smart
Simulation
Wizard
icon
shown
here.
b. Dialogs
will
appear
for
the
first
5
steps:
1)
select
Amplifier
and
Next.
2)
select
Use
an
existing
ADS
design
as
the
Amplifier
subcircuit
and
Next.
3)
select
AMP_1900
and
Next.
4)
verify
the
ports
are
correct,
click
Next
and,
5)
click
Finish.
9‐4
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
c. In
the
schematic,
double
click
the
simulation
setup
drawing
that
looks
like
a
NWA
shown
here.
d. When
the
dialog
appears,
in
the
Simulation
Selection
tab,
select
the
Nonlinear
1‐Tone
Spectrum,
Gain,
Harmonic
Distortion
vs
Freq
and
click
the
arrow
to
add
it
as
shown
here.
e. In
the
Simulation
Settings
tab,
set
the
RF
frequency
to
1.9
GHz
and
the
sweep
from
1
to
3
GHz
in
0.1
GHz
steps
as
shown.
Also,
click
the
RF
Input
Power
and
set
it
to
–40
dBm
‐
and
the
bias
sources
to
0
V.
f. Click
the
Simulate
button
and
when
when
finished,
click
Display
Results.
Results.
©
Copyright
Agilent
Technologies
2009
9‐5
Lab 9: Final System and Circuit Simulation
g. The
data
display
will
open
and
the
results
will
be
automatically
plotted
as
shown
here.
Set
the
marker
to
the
desired
frequency.
Set
the
marker
to
1.9
GHz
or
any
desired
value.
h. As
you
can
see,
the
wizard
can
provide
quick
simulation
results
for
your
circuits.
Examine
the
results.
You
can
place
markers
on
other
traces
and
you
will
see
that
they
match
some
of
the
simulations
you
have
already
preformed.
For
now,
close
the
schematic
and
data
display
–
no
need
to
save
these.
The
next
steps
will
be
to
put
AMP_1900
and
the
filters
together
in
the
system
design.
Important
Note
on
the
Wizard
schematics
–
Always
view
the
schematics
for
your
design
to
verify
the
components
used,
such
as
blocking
capacitors,
variables,
etc.
The
wizard
can
save
you
a
lot
of
time
and
is
similar
to
using
templates
or
design
guides.
But
nothing
can
replace
your
knowledge
of
how
ADS
operates,
especially
when
results
are
uncertain
or
when
the
wizard
setup
does
not
match
your
topology
or
configuration.
3. Create
the
final
HB
swept
LO
schematic
and
equations.
9‐6
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
a. Open
the
existing
system_prj
design:
rf_sys.dsn.
Now,
save
it
with
a
new
name:
final_hb_lo_swp.
Modify
the
design
by
replacing
the
existing
filters
and
amplifier
with
your
designs
as
shown
here.
Step‐by‐step
instructions
follow,
or
try
setting
it
up
by
referring
to
this
drawing:
b. From
the
library,
replace
the
behavioral
filter
behavioral
filter
with:
filter_1900.
Then
Then
replace
the
LPF_Bessel
with
the
Design
Design
Guide
filter:
DA_LCLowpass.
Push
into
Push
into
them
to
verify
the
circuits.
NOTE
on
DT
component
text
–
The
parameters
(Fp,
Fs,
etc.)
may
appear
as
default
values.
This
is
OK
–
do
not
change
them.
c. Also
from
the
library,
replace
the
system
amp
with
your
AMP_1900
and
push
into
it
to
check
it
also.
d. Set
up
two
P_1Tone
sources
for
the
RF
and
LO
as
shown
here.
Be
sure
Num
=,
P=,
and
Freq
=
are
set
with
variables
as
shown.
e. On
the
Mixer,
set
the
Pmin
spec:
PminLO
=
­
5
for
a
starvation
effect
(mixer
diodes
not
responding).
Conversion
gain
is
3
dB
and
S
11,22,33
are
all
set
to
zeros
as
shown.
No
other
parameters
are
necessary.
f. Set
up
VARs
for
RF
and
LO
Freq
and
Pwr
as
shown
here.
Also,
set
Vin
and
Vout
node
labels.
©
Copyright
Agilent
Technologies
2009
9‐7
Lab 9: Final System and Circuit Simulation
g. Write
the
measurement
equation
for
output
power
of
the
IF.
Because
there
is
mixing,
use
the
mix
function
to
identify
the
tone:
dbm_out
=
dBm
(mix
(Vout,
{­1,
1})).
Inside
curly
braces,
the
index
values
are:
‐
1
for
the
LO
and
1
for
the
RF.
The
result,
dbm_out,
is
the
power
of
the
IF
signal
at
Vout.
4. Final
HB
simulation:
2
tones
with
swept
LO
power
and
noise.
a. With
all
other
controllers
deleted
from
the
schematic,
insert
and
set
up
a
Harmonic
Balance
controller
as
shown
here.
You
can
do
this
by
turning
on
the
display
settings
first
and
then
typing
in
the
values
on
screen.
Or,
you
can
use
each
tab
to
set
the
values.
Either
way,
go
to
the
Display
tab
first
and
turn
on
the
display
settings
shown
here.
The
following
bullet
steps
show
how
to
set
up
the
controller
using
the
tabs.
Display tab settings:
•
9‐8
Freq
tab
–
Set
MaxOrder
(mixing
products)
=
3.
Set
Freq[1]=
LO_freq
with
Order[1]=
3
harmonics.
Set
Freq[2]=RF_freq
with
Order[2]
=
1
harmonics
because
its
power
is
low
compared
to
the
LO.
Also,
set
the
Status
Level
=
4
to
display
more
information
(status
window),
including
NF
and
conversion
gain.
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
•
Sweep
tab
–
Set
LO_pwr
as
a
linear
sweep:
Start
=
–30
and
Stop
=
10,
with
Step
=
1,
as
shown.
•
Noise
Tab
and
Noise
[1]
and
[2]:
Turn
on
Nonlinear
noise
(bottom
of
Tab).
In
Noise[1],
set
a
Single
point
Frequency
to
100
MHz
and
Input
frequency
to
RF_freq.
Also
set
Noise
ports
1
input
and
2
output
as
shown.
In
Noise[2],
use
the
Edit
list
box
to
add
Vout
as
the
noise
node.
Leave
all
other
settings
in
their
default
as
shown.
•
Output
tab
–
Click
the
Add/Remove
button.
Then
select
the
RF_pwr
variable
and
click
the
Add
button.
You
will
use
this
in
the
data
display
to
write
an
equation.
You
select
VarEqns
this
way
because
they
are
not
sent
to
the
dataset
by
default.
Only
named
nodes
(pin
and
wire
labels)
and
measurement
equations
are
output
to
the
dataset
by
default.
Node
voltages
and
MeasEqns
set
in
the
Outputs
tab
will
appear
on‐screen
for
the
SavedEquationName
parameter.
b. Check
the
circuit
and
HB
controller
setup
a
final
©
Copyright
Agilent
Technologies
2009
9‐9
Lab 9: Final System and Circuit Simulation
setup
a
final
time
to
be
sure
they
are
correct
(as
shown)
and
then
Simulate,
watching
the
status
window
as
the
power
is
swept.
The
simulator
information
(status
level
4)
is
written
into
the
window
–
this
does
take
longer
than
lower
status
settings.
But
in
this
case,
you
want
the
mixer
conversion
gain
and
noise
figure.
5. Plot
the
data:
NF,
Conv
Gain,
dbm_out,
and
IF_gain.
a. When
the
simulation
completes,
scroll
in
the
status
window
to
see
the
calculated
conversion
gain
and
the
noise
figures
NF
as
shown
here.
NOTE
on
warnings:
metal
loss
message
–
you
can
ignore
this
message.
b. Plot
the
dbm_out
equation
and
you
will
see
the
effects
of
the
swept
LO
power.
Notice
that
near
‐10
dBm
the
mixer
goes
into
starvation.
c. Write
an
equation
for
IF_gain
as
shown
here.
By
subtracting
RF
input
power
from
the
output
power,
the
result
is
the
gain
at
all
values
of
the
swept
LO.
Put
the
equation
in
a
list
and
scroll
to
see
the
results.
d. Save
the
schematic
and
data
displays.
9‐10
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
6. Final
Envelope
simulation:
CDMA
source.
a. Save
the
last
design
as:
final_env_cdma.
b. Replace
the
source
with
a
PtRF_CDMA_ESG_FWD
source
from
the
Sources‐modulated
palette
–
be
sure
to
insert
the
same
CDMA
source
shown
here
which
is
based
on
a
real
signal
generator.
Set
FO
=
RF_freq
and
Power
=
dbmtow
(RF_pwr)
as
shown.
c. Add
a
new
VAR
block
for
t_step,
t_stop,
bit_rate,
sam_per_bit,
and
num_sym
as
shown
here.
Also,
add
an
Options
block
which,
by
default,
forces
S‐parameters
to
be
used
for
the
linear
elements
(BPF).
If
you
edit
the
options
block
you
will
see
the
setting
to
use
S‐parameters
when
possible.
d. Change
the
measurement
equation
to
read
like
the
one
shown
here:
IF_out
=mix
(Vout,
{­1,1}
).
e. Replace
HB
with
an
Envelope
controller
and
set
it
up
using
using
the
variables
as
shown.
Also,
in
the
Output
tab,
leave
leave
both
boxes
unchecked
and
select
IF_out
and
Vout
using
Vout
using
the
Add
/
Remove
buttons
so
that
this
is
the
only
the
only
data
in
the
dataset.
f. Simulate.
©
Copyright
Agilent
Technologies
2009
9‐11
Lab 9: Final System and Circuit Simulation
9‐12
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
7. Use
an
Example
DDS
to
plot
ACPR
and
Power
for
your
circuit.
a. When
the
data
display
window
opens,
click:
File
>
Open
and
use
the
dialog
to
go
to
the
ADS
installation
directory
to
find:
examples
/
Tutorial
/
ModSources_prj
/
IS95_FwdLinkSrc.dds
b. Open
this
DDS
and
then
click
the
DDS
command
File
>
File
>
Save
As
and
save
it
in
your
system_prj
(scroll
(scroll
using
the
arrow
buttons).
Save
it
with
the
same
same
example
DDS
name.
c. Notice
the
values
will
be
red
or
invalid
without
the
example
data.
Change
the
default
dataset
to
your
final_env_cdma
dataset.
Then
change
the
Eqn
Vfund
to
your
IF
output
equation:
Vfund
=
IF_out.
d. The
result
is
the
example
calculations
are
now
used
for
your
dataset.
Examine
both
pages
in
the
data
display
(ACPR
and
Pwr).
You
can
use
any
example
data
display
for
you
data
in
this
way
like
a
template.
DDS
pages:
1)
ACPR
and
Trajectory
and
2)
Power
Calcs
e. Examine
the
data
and
then
Save
and
close
the
data
display
window.
©
Copyright
Agilent
Technologies
2009
9‐13
Lab 9: Final System and Circuit Simulation
8. Plot
the
spectrum
using
a
programmed
marker
slider.
The
next
several
steps
will
show
you
how
to
use
powerful
expressions
to
pass
a
marker
value
to
a
function
and
plot
the
data
whenever
the
marker
is
moved.
a. Open
a
new
data
display
and
name
it:
Marker_Slider.
Marker_Slider.
b. Insert
an
equation.
Click
the
Variable
Information
button.
You
will
see
that
freq
is
dependent
upon
time.
time.
Close
the
dialog.
c. Write
the
equation
marker_freq
shown
here.
This
will
access
all
frequencies
at
one
point
in
time.
You
can
use
any
time
point
because
the
number
of
calculated
frequencies
are
the
same
at
any
time
point,
according
to
the
order
and
max
order
you
set
in
the
envelope
simulation
controller.
Use
zero
as
shown.
d. Insert
a
plot
of
the
marker_freq
equation
which
is
plotted
against
the
independent
variable:
freq.
Next,
you
will
make
it
look
like
a
slider.
e. Edit
the
plot.
Remove
the
Auto
Scale
for
the
Y‐axis.
Set
the
Y‐axis
Min,
Max
and
Step
to:
6e­12,
6e12,
and
6e12
as
shown.
Then
click
the
More
button
and
set
the
Y
axis
font
size
=
0
(type
it
in).
Thicken
the
trace
if
you
want.
Click
OK
and
then
put
a
marker
on
1900
MHz.
Be
sure
to
size
it
so
that
it
looks
like
the
slider
shown
here.
9‐14
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
f. Write
the
equation
freq_index
using
the
find_index
function.
The
marker
value
and
marker_freq
are
passed
into
the
argument
to
return
the
index
value
of
the
marker
position.
This
equation
will
be
the
look‐up
value
for
the
Vout
data
you
want
to
plot.
g. Write
the
equation
marker_spectrum
to
plot
the
spectrum
around
the
marker
frequency
value.
The
fs
function
transforms
the
envelope
time
data
into
frequency
‐
the
two
colons
(::)
represent
all
time
points
and
freq_index
is
the
index
value
of
the
marker
frequency.
Use
5
commas
after
the
bracket
and
type
in
the
“Kaiser”
window
function.
In
all
ADS
functions,
you
can
disregard
any
argument
by
using
commas.
h. Plot
the
marker_spectrum
equation
and
change
the
Trace
Type
(Trace
Options)
to
linear.
Then
move
the
slider
to
100
MHz.
Put
two
markers
on
the
spectrum
as
shown
and
write
an
equation,
BW,
using
indep
to
get
the
independent
variable
of
the
markers
(x‐axis).
Insert
a
list
of
BW
as
shown,
changing
to
Engineering
format
with
4
significant
digits
and
removing
the
independent
data
(Plot
Options).
i.
Move
the
marker‐
BW
remains
the
same.
Examine
your
work,
save
the
data
display
and
the
schematic.
Your
circuits
have
now
been
simulated
in
the
system
and
you
have
completed
the
course!
©
Copyright
Agilent
Technologies
2009
9‐15
Lab 9: Final System and Circuit Simulation
9‐16
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
9. CDMA
Envelope
Simulation
with
Frequency
Sweep
Do
this
only
if
you
have
time…
This
simulation
shows
how
to
sweep
the
RF
frequency
and
adjust
the
LO
variable
for
frequency
so
that
is
always
producing
the
same
IF
output
frequency.
Afterward,
the
IF
output
spectrum
can
be
plotted
to
show
the
results
for
a
varying
RF
input
frequency
sweep.
To
do
this,
you
need
to
set
up
a
parameter
sweep
of
the
RF,
redefine
the
LO
variable,
and
then
plot
the
IF
output
for
each
of
the
RF
frequencies.
a. Save
the
current
design
(final_env_cdma)
with
a
new
name:
final_env_cdma_
swp.
b. Insert
a
parameter
sweep
from
from
any
simulation
palette
and
palette
and
set
it
up
as
shown
shown
here.
The
quotes
will
appear
if
you
appear
if
you
edit
the
controller
and
enter
and
enter
the
values
there
–
if
not,
be
sure
be
sure
to
type
them
onto
the
schematic.
schematic.
SweepVar
=
RF_freq
SimInstanceName
=
Env1
Start
=
1700
MHz
Stop
=
2100
MHz
Step
=
200
MHz
This
will
sweep
the
RF
signal
with
3
frequencies:
1700
MHz
will
cover
the
low
end
and
2100
MHz
the
high
end
which
are
both
just
outside
of
the
BPF
response.
Of
course,
you
could
sweep
it
more
finely
but
that
would
take
more
time.
c. Change
the
LO_freq
variable
to
track
the
track
the
RF
signal
sweep
by
setting
it
as
setting
it
as
shown:
LO_freq
=
RF_freq
–
RF_freq
–
100
MHz.
This
will
make
the
LO
the
LO
always
be
100
MHz
less
than
the
RF
the
RF
for
any
number
of
steps
in
the
the
parameter
sweep.
d. Save
the
design
‐
no
other
schematic
schematic
changes
are
required.
©
Copyright
Agilent
Technologies
2009
9‐17
Lab 9: Final System and Circuit Simulation
9‐18
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
e. Your
design
should
look
like
the
one
shown
here.
If
it
does,
then
Simulate.
f. After
the
simulation
is
finished,
insert
a
rectangular
plot
and
add
Vout
as
the
Spectrum
of
the
carrier
in
dBm
dBm
with
windowing
as
shown
here.
here.
Click
OK
and
the
plot
will
appear.
g. Edit
the
trace
(double
click)
and
use
Trace
Options
to
change
the
trace
to
Linear
to
better
see
the
output
traces.
Notice
that
the
spectrum
is
for
Vout[1]
which
100
MHz
IF
tone.
However
there
are
three
resulting
IF
tones
from
the
sweep.
Now,
you
need
be
able
to
see
which
trace
results
from
which
RF
–
you
will
do
this
in
the
next
step.
©
Copyright
Agilent
Technologies
2009
9‐19
Lab 9: Final System and Circuit Simulation
h. Edit
the
plot
one
more
time
and
use
and
use
Trace
Option
and
the
Trace
Trace
Expression.
Go
to
the
Linear
Linear
tab
and
turn
on
Line
Color
and
Color
and
Display
Label
as
shown
shown
here
and
click
OK.
i.
Your
plot
should
look
like
the
one
one
shown
here.
But
to
identify
the
identify
the
traces
even
better,
use
use
the
command:
Insert
>
Plot
Plot
Legend.
Finally,
you
can
see
the
three
IF
spectral
traces
that
result
from
each
on
of
the
RF
tones.
This
shows
how
to
sweep
frequency
for
a
circuit
envelope
simulation
and
how
the
response
of
the
circuit
can
be
analyzed.
9‐20
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
This
completes
the
lab
exercise
‐
the
remaining
steps
are
optional.
Do
them
only
if
you
have
time
and
have
access
to
the
Ptolemy
simulator.
©
Copyright
Agilent
Technologies
2009
9‐21
Lab 9: Final System and Circuit Simulation
10. OPTIONAL
­
Co­simulation
of
the
behavioral
RF
system.
Create
two
levels
of
hierarchy:
1)
bottom
level
simulation
of
the
behavioral
system
with
a
circuit
envelope
simulation
setup
and
2)
a
top
level
data
flow
simulation
using
the
DSP
palettes.
The
steps
follow…
a. Open
the
original
rf_sys.dsn
you
created
in
lab
2
and
save
it
as
sys_bottom.
Modify
the
design
as
follows:
Set
the
Mixer
PminLO=
–
5
as
shown
here.
Also,
put
port
connectors
on
the
circuit.
Insert
an
Envelope
controller
and
set
it
as
shown.
Note
that
you
do
not
need
to
insert
or
declare
a
VAR
here
–
it
will
be
in
the
top
level.
b. Save
the
design
and
close
it
using:
File
>
Close
Design.
c. Open
a
new
blank
schematic
window:
File
>
New
Design.
When
the
dialog
appears,
type
in
the
name
sys_top,
and
select
Digital
Signal
Processing
Network
as
the
type
and
then
save
the
design.
9‐22
©
Copyright
Agilent
Technologies
2009
Lab 9: Final System and Circuit Simulation
d. In
the
new
design,
sys_top,
build
the
design
shown
here:
•
DF
(data
flow)
‐
is
in
the
Common
Components
palette.
Set
only
the
DefaultTimeStop
=
t_stop.
•
Data
‐
is
in
the
Timed
Sources
palette.
Set
only
the
first
two
parameters
Tstep=t_step
and
BitTime=symbol_time/2.
•
SymbolSplitter
–
is
the
Data
Splitter,
in
the
Timed
Data
Processing
palette.
Set
only
the
two
parameters
shown.
•
LPF_RaisedCosineTimed
–
These
filters
are
in
the
Timed
Filters
palette.
Insert
one
filter,
make
the
settings,
and
then
copy
it.
•
QAM_Mod
–
the
modulator
is
in
the
Timed
Modem
palette.
Set
as
shown.
•
Insert
the
sys_bottom
design
from
the
regular
library.
•
EnvOutShort
–
from
the
Circuit
Cosimulation
palette,
this
component
captures
the
IF
signal
from
the
sys_bottom
design.
•
Insert
the
TK
plot
and
TK‐XY
plots
from
Interactive
Controls
and
Displays.
•
Insert
the
resistor
and
ground
and
the
VAR
block.
e.
©
Copyright
Agilent
Technologies
2009
9‐23
Lab 9: Final System and Circuit Simulation
Check
all
the
values
and
variables
to
be
sure
they
are
correct
and
Simulate.
When
you
do,
you
will
set
the
two
plots
in
action.
Use
View>
View
All
to
rescale
the
plots
if
needed.
f. Quit
the
simulation
using
the
control
and
insert
a
Spectrum
Analyzer
component
from
the
Sink
palette.
Connect
it
to
the
output
and
edit
it
to
select
the
window
type
as
Kaiser
shown
here.
Be
sure
to
set
the
other
values
as
shown.
g. When
the
status
window
shows
the
data
collection
is
complete
for
the
sink
(SpectrumAnalyzer),
Quit.
h. Open
the
data
display
and
add
dBm(CDMA_spectrum)
to
a
rectangular
plot.
SUMMARY
‐
This
data
is
the
result
of
a
co‐simulation
between
Ptolemy
and
the
Envelope
simulator.
It
marks
the
end
of
the
ADS
Fundamentals
lab
exercises.
END
of
LAB
EXERCISE.
9‐24
©
Copyright
Agilent
Technologies
2009

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