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Section
V
a.
Connect
test
equipment as shown
in
Figurc
5-2.
Note
that the
cable lengths
are
critical
and
must be
as
specificd
in
Figure
5-2.
b.
Turn on
all equipment
and
allow
a
warmup period
of
at
least
I
hour
before proceeding.
c.
Set
the
3575
A
cotrtrols
as
follows:
DISPLAY*
.
.
,
AMPLITUDE
AMPLITUDE FUNCTION.
.... ... ..
B
Voltage
Range
.
0.2
mV
-
2
V
(both
channels)
FREQUENCY
RANGE
..
.,1
tLz
-
t kllz
PHASE
REFERENCE
......
..
...
..
A
*
Options 001 003:
Set
the
AMPLI-
TUDE
B/PHASE
switch
to
PHASE
so
that
amplitude
and
phase
can
be observed
simultaneously.
Disregard any
further
ref-
erences
to
the
DISPLAY switch
in
the
following
steps.
d.
Set
the
Frequency Synthesizer
amplitude
to
+
25.05 dBm
(2
V
rms
at outputs
ofPower
Splitter)
and
frequency
to
I
Hz
wirh
Leveling
switch
to
OFF'.
e.
Set
the Variable Attenuator
to
0
dB.
f.
Allow
tine
for
the
3575A
reading
to
stabilize.
g.
The
channel
B
amplitude reading
(B
dBV)
should
be
within the
tolerances
listed
in
Table
5-2
for
the
corre-
sponding
input
frequency
and
attenuator
setting.
h.
set
the AMPLITUDE
FUNCTION switch
to
B/A
and
allow time
for
the
reading
to
stabilize.
i.
The ts/A
reading should
be within the
tolerances
listed
in
Table
5-2
for
the
corresponding
input
frequency
and
attenuator
setting.
j.
Reset
the AMPLITUDE
FUNCTION switch
to
B.
Set
the
DISPLAY switch
to
PHASE
and allow
time
for
the
phase
reading
to
stabilize.
k.
The 35754
phase
reading
should
be
0
degees
I
tolerances
listed
in
Table 5-2
for
the
coresponding
input
frcquency
and
attenuator
sotting.
I.
RESCT
thE
DISPLAY
SWitCh
tO
AMPLITUDE.
rn.
Repeat Steps
I
through
I
for
each
input
frequency
and
attenuator
settin8 listed
in
Table 5-2.
For
frecluencies
greater
than
10
Hz, the
33208
Leveling
switch
must
be
set
to
ON. Note that the 3575A Voltage
Rarge and
Frequercy
Range
switches
must be
set
as
indicated
in
thc
table. For
most
of
the
checks
listed
in
Table
5-2,
the Voltage
Range
switches should
be
set
to
the
0.2 mV
- 2 V
position. At
various
points
in
the
1able,
however,
the
2 mV to 20 V
range
is
specified.
The
reason
for
this is
to
spot check
the
amplitude
readings
on the high
range. These particular
54
Model
3575A
checks
do
not apply to
phase since phase
must
be measured
on
the
lowcst
applicable
range.
NOTE
tlhefi
the
point is
reached
where
the
input frequenc!
is
I
MHz and
above, reverse
the
Channel
A
input
contlection
so
that both
sigruls
ore
terminated
dt
the 35754
input
connectors.
n.
Again
reyerse
the
Channel A
input
connection
so
the
termination
is
at
the
output
of
the Power
Splitter
as
shown
in
Figure
5-2.
Connect
the
terminated
output ftom
the
Power Splitter
to
Channel
B
and
the
terminated
output
from
the Variable Attenuator
to
Channel
A.
o.
Set
the 3575A controls
as
follows:
DISPLAY
....AMPLITUDE
AMPLITUDEFUNCTION..........
A
Voltage
Range
.
0.2 mV
-
2
V
(both
channels)
FREQUENCY
RANGE
.
.
.
.!
Hz
-
l
kHz
PHASE
REFERENCE
.,..
.. ,. .,
.,.
A
p.
Set
the
Frequency Synthesizer
amplitude
to
+
25.05
dBm, frequency
to
I
Hz and
Leveling
to
OFF.
q.
Set
the Variable Attenuator to 0
dB.
r.
Allow
time
for
the 3575A
reading
to
stabilize.
s.
The
channel
A
amplitude reading
(A dBV)
should
be
within the
tolerances
listed
in
Table
5-2
for
the
coues-
ponding
input
frequency
and
attenuator
setting.
t.
Set
the AMPLITUDE
FUNCTTON
switch
to
B/A
and
allow time
for
the reading
to
stabilize.
u.
The
B/A
reading should
be
within the
tolerances
listed
in
Table
5-2
for
the
corresponding
irput
frequency
and
attenuator
setting.
v.
Reset
the
AMPLITUDE
FUNCTION switch
to
A
and
PHASE REFERENCE
to
-
A.
Set
the DISPLAY
switch to
PHASE and
allow
time
for the
phase
reading
to
stabilize.
w.
The
3575A
phase
reading
should
be
-
180
degrees
or
+180
degrees
1
tolerances
listed
in
Table
5-2
for
the
coffesponding
input
frequency
and
attenuator
setting.
X,
RESCT
thc DISPLAY
SWitCh
tO
AMPLITUDE.
y.
Repeat
Steps
r
through
x
for
each
input
frequency
and
attcnuator
setting listed
in
Table 5-2.
For
frecluencies
greater
than
10
Hz,
the
33208
Leveling
switch
must be
set
to
ON.
Use
the
Voltage
Range
and
Frequency
Range
settings
indicated
in
the
table.
NOTE
llhen
the
point is
reached where
the
input
ftequency
is
I
MHz
and
above, reverse
the
Channel
B
input
connection
so
that both
signals
are
terminated
at
the
3575A input
connectots.
PEBFOBMANCE
CHECKS
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