Scction V
a.
Consruct an R/iC network
as
shown in Figure 5-.+.
b.
CoDnect
the
two BNC
to
Binding Post Adaptors to
the i575A input oorrrrectors.
c.
Con,rect
thc
output leads of rhe R/C network to the
3575A
inputs
as
shown in Figure
5-.1.
Thc
lcads from tl)e
R/C nclvork to the
-1575A
should
be of
eclual
length and as
short
as
possible.
d. Connect the
50-ohru
output oI thc F'requency
Synthesizcr,
tc ninated in
50-ohm load.
to
tlle input
(Jl)
ol
the
R/C network.
Usc a 50-ohm shielded cable
to
conncct
the
Frequcncy Sy
tltesizer
output to the
Feed-Thru
J ennination.
e.
Set the
3575Acontrols
as follows:
DISPLAY ...,,..,.PHASE
Voltage Rangc
. 0.1 nrv
-
I
V
(both
chartrtcls
)
FRL,QUEN('Y RANCE
. . .
Sct
to
lowest
aPPlicable
range
PHAStt RT,FLRENCE . ... .... ..
.. .
A
PEB FOBMANCE
CHECKS Model 3575 A
f.
Set the Frequency
Synthcsizcr amplitude to
+
19.03 dBm
(2
V ms/50 ohms).
Set the frequency
controls
to
provide
the desired
liequency.
tr"OTIi
Relbr
to
the
Plvsa
Arcurat)' specificatin listing
h Table
I
I
(SeLtirnt
I)
to Lletcntitle the Phasc
ertut tolerante
for
tlte
trrrasprtttJittg inpLtt let,cls
otttl
Jrequenct,.
Adll
!
A.J
tlegtecs to
phasc
aftt)r lt)leranrcs
to
allo\\,
1'or
patrcl
rcter
g.
The
phase reading
should be
+90
degrees or
-90
degrees 1
tolerances
listcd in
Table l-1. Add
10.3
degrees
to
phase
error tolerances
to allow
lbr panel
meter crror.
Due
to
the
responsc
of
the R/C network, the
input levels
wiil vary
with frequency.
Usc thc 3575A
amplitude
lunctions
to measurc
thc input levels
and use the lower
level to
deter
line
thc
phase
accuracy specification.
3,.LEAD
TO
CHANNEL A
IN PUT
5OO
FEED-THRU
TER[/
INATION
-hp-llO48C
5OO
CABLE
FROM
FREQU
ENCY
SYNTH ESIZER
NOTE
The actual values ot
com@nenis used in lhis
network
are
not
critical. ln order to obtain
an accurate
90
degree
phase
shift,
however, the two resislors
and the two capacitors mustbe DAldk\l
to within ! 1%.
The component tolerances
given
in the
parts
list
do
not
rneet ihis
specific.tion and are
given
only to spare the expense
of using
precasion
cornponents.
lf the recommended
()omponenrs
are
used,they rnust be se/C(1cr1to
meet the
t
1% specification.
3,,LEAD
TO
CHANNEL B
IN PUT
3.,GROUND
LEADS
TO
CHANNEL
A
A
CHANNEL B
IN PUT
CONN ECTORS
Parts List.
Desiqnator
c1,c2
c1,c2
J1
R1.R2
C:
Ixd mica
10,000
pF
10 % 300 V
C:
lxd mica 100
pF
2 %
300 V
Connector: BNC
female
Rr fxd f m 1 02 ks11
'/.
114 W
0140,0171
0140-0176
1250-OO83
0698-4615
100
Hz-1 MHz
1 N4Hz
.
13 MHz
10O Hz 13 MHz
5.8
Figure 5-4- R/C Phase
ShiJt Network.
To Next Page
Loading...
Need help?
General
