Section V
PERfORMANCE CHECKS
Model 3575 A
50-ohm
Feed'Thru Termination
(-hp-
Nlodel l1048cl
thrr th. 35754 Frcquency
Range switch must be set as
*
A Test Osci.llator such as
the
-hp-
Model 65lll can be
indicated in the tahle'
used
in
place
ofthe
Frequency
synthcsizer'
k.
set the
Frequency
synthesizer
frequency
to
l Hz.
a.
Conneit
rhe 50-Ohm uutpur
oI rhe Frequeniv
Synthesizer, tcrminated
in 50-ohm load. to the
input
of
thi
I
Set the
3575A controls as follows:
Power
Amplifier. Using a BNC
Tee connector and two DISPLAY
. . .
.. . . AMPLITUDE
equal
len8th
cables
with BNC
connectors,
connect the AI\,IPLITUDE
FUNCTIoN
. . . .
. . .
,
.
. . . .B
5-13. High Level Accuracy
Checks.
5-14.
The
purpose of
these chccks
is to verify that the
3575A meets tho amplitude
and
phase
accuracy specifi-
cations
with the Voltage Range
switches
sct
to
the
2mV-20V
position.
These
chccks are
performed
with
20 V rms applicd
to both inputs.
RECOMIUENDED
TEST EQUIPM ENT:
Frequerrcy
Synthesizer
(-hp-
Model 3320B)*
Power Arnplificr
Chp-
Nlodel 467A)
Power
Arnplifier
output
to the 3575A
inputs.
b.
Set the 3575A controls
as
follows:
DISPLAY+
,.,AMPLITUDE
AMPLITUDE FUNCTION..
..., ....
A
Voltage
Range .
.2
mV
-
20
V
(both
channels)
FREQUENCY RANCE ..
..1
Hz
-
1
kHz
PI.IASE REFERENCE
... ... .... ...
A
*
Options 001 003:
Set the AtrIPLl-
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.
Table
5-3. High Level Accuracy Checks.
lnput
Range
Phas€
(0o
or
18Oo)
lHz
10 Hz
100 Hz
I kHz
10 kHz
20
kHz
50 kHz
2OO
kHz
l
MHz
1-1K
11K
1-1K
1"1K
10
-
100 K
10
-
100
K
10
-
lo0 K
r00 1 M
r00,1 M
I
0.8 deS.
r
O.8 deg.
r
0.8
deg.
!
0'8 deg.
!
0.8 deg.
t
0.8 deg.
1
1.3 deg.
1
2.3 des.
r
5.3
deg.
VoltageRange
.....2mV-20V
(both
channels)
FREQUET"CYRANGE
. ...
. . . .t Hz.1
kHz
PIIASITREFhIIENCE
...
-...........-A
m.
Allow time for
the reading
b stabilize.
n.
The channel
B
amplitude reading
(B
dBV)
should
be
+
ln.0 J
BV
-t
I
..r
dBV.
o. Set thc
PHASE
REFERENCE
to
,
A and the
DISPLAY
swirch
to PIIASE
and allow
ti[re for the
pllase
readinq
to stabiiizc.
p.
The
3575A
phase
reading
should be
,
180 degrees or
+
l80degrees l
tolerarces
listed
in Table 5-3 for
the
corresponding
input frequency.
q.
Reset rhe DISPLAY
switch
to AMPLITUDE.
c.
Set
the
Power Arnplifier
gain
to
Xlo.
r.
Repeat
Steps m
though
q
with
the Frequency
Synthesizer
set to each frequency
listed
in Table 5-3.
d.
Sct tlre
Frequencl
Syntlrcsi,/er arrrplirude ro
+
19.03
dBm
(2
V rnts,/50 olrrns)
and
frequency
to
I
Hz.
515.
Shunt Capacitance
Check.
e.
Allow tine
for
the reading
to stabilize.
5-16.
The
purpose
of
thjs check is to verify
that both
f.
'[he
channel A amplitude reading
(A
dBV) should
be channels
neet the
(
30
pF
shunt capacitance
specification
+
26.0 dtsv
1
1.3 dBV.
listed
in Table l-1.
g.
Set the DISPLAY
switch to PHASE
and altow time
RECOMN,IENDED
TEST EeUtrMENT:
for
thc
phase
reading
to stabilize.
Frequency
Synthesizer
(-hp-
Model 3320B)x
h.
The 3575A
phase
reading
should be
0
degrees
(2)
50-Ohm Feed-Thru
Terminations
(-hp-
Model
I
tolerances listed
in Tablc 5-3 for
the
corresponding input
I I
O48C)
frequency.
50-ohm
power
splitter
(see
Figure 5-1)
i-
RESCT thE DISPLAY
SWitCh tO AMPLITUDE.
Resistor:
I Megohm,
t
l7c ll2W
(-hp-
Part
No.
07s7.0059)
j
Repeat
Steps
e
through
i with the Frequency
x
A
Tcst Oscillator suchasthe-hp-
Modcl
6518can
be
Synthesizer set
to
cach frequency
listed
in Table 5-3. rr-ote
used
in
place
of
the Frequency Syirthesizer.
5-6
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