Section V
ADJUSTMENT
PBOCEDUBES
Model 3575A
DISPLAY
.. ..PHASE
VoltrgeRange .....0.2mV-2V
(both
channels)
FREQULNCY RANGE . .
..
. l0 llz
-l00kHz
PHASEREFFRT]NCE ............... A
L
Sqr A5Sl Jrd AoSl r.r
CAL
l.
d. Adjust A5R3l
(ZERO
ADJ) lor
0
V
10.1
mV dc at
the Analog Output.
e. Leave
A5S1
and A651 set
to CAL I for the followirg
procedure.
5-35.
Current
Source
and Current Sink
Adiustments.
5 36. Thcse adjuslmcnts set the
P1
and
P2
Current
Sources
and
the X and
Y
Current Sinks to
produce
the
proper
dc
levels
at the olrtput of the
Phase Detector. These are the
prinrarl phasc
accuracy adjustments in the instrurrent.
RI.COMI,IT]NDF:D
TEST F]QUIPMENT:
DC Digital
Voltnleter
(hp-
Model 34508)
a. Connect DC Digital Voltr'reter to ANALOG OUT-
PUT
1.+
b. Se1 the
3575A
controls as folkrws:
DISPLAY ....PHASE
VoltageRrnge .....0.2mV-2V
(both
channels)
FREQUENCYRANGE
.. . .. 10Hz.100kHz
PHASEREFERENCE
............... A
c. set
A5Sl
to CAL 2. Set
A651
to CAL l.
d. Adjust A5R,10
(P1
ADJ) tbr-1.8 V
10.1
nrv dc at
the AnaloS Output.
e.
kave A5S1 sct to CAL
l.
Set A651 to
CAL 2.
i. Adjust A6R19
(Y
ADJ) for
I
V
t
0.1 rnv dc at the
Anakrg Output.
g.
Leave
A5S1 set
to CAL 2. Set A651 to CAL 3.
h.
Adiust A6R2l
(X
ADJ) for
1 V
t
0.1
mV
dc at the
Analog
Output.
i. Leave A65l
set ro CAL 3. Set ASSI
to CAL 3.
j.
Adjust A5R39
(P2
ADJ) for
0
V
l
0.1 mV dc at the
Anaiog
Output.
k. Reset
A5S1 and A651
to
NORMAL
(4).
h. Connecl r short .lip lerd
between
A1OTPI
and
A1OTP2.
i. Adiust
A10R:l ri)r
0
\'
t
0.05 nrV dc
at Analog
Output
2.
j.
Rellove
the
clip lead.
5-31.
Panel Meter Zero Adjustment
(Standard
& 0ptions).
5'31. This adiustrnelt
reroes
the
panel
ireter in
the
Standard instrunrert and both
palel
nrcters in the Optio1l
instrunlents. Bclirrc
procceding
with these ad]ustDrents,
perfonn
the
Pancl
Meter Accuracy Check
(Paragraph
5-9)
to
deternrirle
if
adjustnlents
are necessarv.
RECOI,I\lLNDhD TLST LQUll']I{l-rr-T :
DC Digital Voltmcter
(Jrp-
Model 3.150B)
a.
Perforrn Steps a through h oi the
Panel
lleter
Rerroval
procedure
(Figure
5-5J to
gain
access
to
the
panel
nreter adjustnrelits.
b. Sct the 3575A colltrols as follorvs:
DISPLAY
,
.
. .PIIASI:
-A.N,IPL]TUI)EFUNCI'ION
..,.......,8/A
VoltageRange .....0.2nV-lV
(both
cliannels)
FREQUENCYRANGE
.
..
..
10Hz-100 kHz
PHASEREFERE\CE .....,....,,,.. A
c. Connect
DC DiSital Voltnreter to ANALOG OUT-
PUT
1.
d. Connect a
short clip lead bctrvccn A9TPI and
A9TP2. Il the instrunlent contaios two
pancl
rncters. also
conncet a short clip
lead
between A1OTP1 and A10TPl.
e. Adlust 422C4
(insidg
adjustmcnt)
tirr
a
Panel Nleter
display ol .000
t
.003.lfthere are two
pancl
nreters, adjust
A22C4 in both.
Removc short(s) in Step d.
5-33.
Phase Detector
Zero Adjustment.
5-3.1. This
adjustrrent nulls out anl dc offset introduced
by
the Buffer/lntegrator
ir tllc
Plrasc
Dctector.
RECO\'II\I ENDLD TEST EQLIIP\'lENT :
DC
Digiral voltnreter
(-hp-
Nlodel
3,150B)
a. Connect DC Voltmcter to A\ALO(i
OLiTPUT 1.+
b. Set tl)e 3575A controls rs foliows:
*Options
001
-
OO3: Connect
DC Digital
Voltmeter to ANALOG OUTPUT
2. Set
the
AMPLITUDE
B/PHASE
sw;tch
to PHASE.
5-10
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