HP 3575A User manual

t:
OPERATING AND SERVICE MAttIUAT
MODEL 3575A
GAIN.PHASE M ETER
Scrial Number: 1.150A016.16
IMPO BTANT NOTICE
Th s loose leaf rnanual does not require a change sheet. All change information
has been inteqrated into rhe manual by meansof r-"vised pages Each revised page
rs denlified by a revsion letler located al the boltorn of the page. A reference,
locared directly below the revislon lerter, indicates which of the backdating
changes in Appendix C apply to that page. lf the serial number of yoLrr
nstrurnent rs lower than the one on this title page, the manual contains revisions
thar may nor appy to your nstrument. Refer to Appendix c for complete
birck dat ing information.
-hp' Port No. 0.1575'90002
(Completc Ilanual includins Binder)
Nlicrofiche No. 0-3 575-9005.1
Ci)pyright HervlettJ']ackard Conrpanl' 1972
P. O. tsox 301. Lovclund. Colorado 80517 U. S. A. MA
P nted: June 1976

HEWLETT ;hE
aPACKARD
CERTIFICATIO N
Hewlett-Packdrd Company ccrtifies thdt tltis instrutterrt tnat its publislrcd
specifications .tt the time of shipment fron the factory. Hewlett-Packard
Company further certifies that its calibrdtion medsuremetlts ure trdceable to thc
United States National Bureau of Standards, to the extott allowed by the
Bureau's calibration facility, and to the calibrution facilities of other
lnternational S t dndard s Organi: at io n me mb er s.
WARRANTY AND ASSISIANCE
This Hewlett-Packard product is warranted against defects in materials and
workmanship for a period of one year from the date of shipment, except that
in the case of certain components, if any, listed in Section I of this operating
manual, the warranty shall be for the specified period. Hewlett-Packard will, at
its option, repair or replace products which prove to be defective during the
warranty period provided they are returned to Hewlett-Packard, and provided
the proper preventive maintenance procedures as listed in this manual arc
followed. Repairs necessitated by misuse of the product are not covered by this
warranty. NO OTHER WARRANTIES ARE EXPRESSED OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
HEWLETT-PACKARD IS NOT LIABLE FOR CONSEQUENTIAL DAMAGES.
lf this product is sold as part of a Hewlett-Packard integrated instrument
system, the above warranty shall not be applicable, and this product shall be
covered only by the system warranty.
Service contracts or customer assistance agreements
Hewlett-Packard products.
For any assistance, contact your nearest Hewlett-Packard
Office. Addresses are provided at the back of this manual.
are available for
Sales and Service

Modcl 35 75A Table of Contents
TABLE OF CONTENTS
Scction Page
I GE\ER.{Ll\FOR\lATIOlr- .......1-l
I'1. Descripti,ri ......1-l
1-10. Sp!'.ilijJllons .............1-i
1-l -i. Optioni ......... 1-l
l-16. Acce:sLrrie: Supplied . .. . . .. .l-4
l-18. .-\.i.ssori.: \rrilrble . ....... l'1
1-10. Inrrrunr.'nt lnrl \llnull Identificrtion ... . 1".1
Section
II I\ST{ LL \TIO\ A\D I\TERFACING 1.37.
4.48.
.+-5 3.
1.57.
.1,66.
.1-69.
.1-96.
l-r. I ,'r . I,. .f-- ., .
1,5. Ptr* c r Requrr.'mcnts
2-1 P rr< (s11.
2.q. Cr.J.r.Jrr,- R< luitrrn<n .... .. ...
2-l l. Ertrr ,r m. r. . I Rc.1 ri,rmcnr. . . . . .
2- 13. InstrlLr i',n
2-l-1. B. r .', \!. ..tr,t.rr:
2-16. R:.'k \lounting
2-18 Rep,.L.-.r,t i. Slrrpmcrrr
2-ll. Iu., :,.r'- rOpr ,rr 00J.00J) ...... ..
2-15. C,),npur.r Int"'rircing
2-:7. Prr. lr.tr"Jur..l
Section Page
III OPERATI\G I\STRL'CTIOI,iS.... , ... , ,., . .3-I
3'1. In lrodu. rir,n . . . . . . . . . . . . . . 3-l
3-3. Ctrntrolr rn,l Indicrtors . ....-l'l
3-5. Gc'rlerul Op.raliig Inft)rmation . .. .. .. . .3-l
3-6. lnput Conn.ctions ........3-l
3-8. GrounJingandTerminatiorl .........-l-l
3-19. InpurClinsrraints ..........1-5
3-2.1. \'oltes.Runses ..........-l-5
3-)7. Frrquen$ Ranges.. ......3-5
3--10. \l!'1.rInJi.i11ion .........3-5
3--17. Anrlo!Outpuls ..........3-6
3-.11. Basi. OperrtinuProcedure ............. 3-6
3-1)- l 5trunl.,rt Turn Ol .. ... ..... . ... .3-6
-3-.13. AmpirruJ.'\lcasurernents ...........3-1
3-48. Phrse\leasurements ...............-l-8
3-59. Lsins i0:l Divider Probes .. . .. .. .. .3-10
3-64. Oprions ........-l-ll
3-65. Op.rol 001 .... ... ..3'll
3-11. Oprjon00l.003 .........3'll
3-87. Using r Pnnter . .. ... . . ... -l'1.1
3-89. Trisg.nn! . ...3-1.1
-l-91. Print,rut . . ...3'14
Section Page
V MAINTENANCE . . . . , . -...,....5.1
5-1. lntroductiolt . . . . . . . . . . . . . .5-l
5-,1. RccommendedTestEquiprnent.........5-l
5-5. Perlbrrnance Checks .. ......5-2
5-7. Test Card . ... .... . .... ..5-?
5-9. Panel Meter Accuracy Check .........5-2
5-ll. Amplitude and Phase Accuracy Checks . 5-3
5-13. High Lgvel Accuracy Checks . .... . ...5-6
5-15. Shunt Capacitance Check ......... .5-6
5-17. Supplellrental Phasc Accuracy Chcck . . .5-7
5-19. AdjustmentProcedures ......5-9
5'll. Test Equipment ..........5-9
5-13. Tcst Point and Adjustnrcnt Location . . .5-9
5-15. + l2 V Rclerence Adiuslrllcnt ........5-9
5-:7. Power Supply Voltagc Chccks . . . . . . . . 5-9
5-19. Output FiltcrZero Adjustmcnts ...... 5-9
5'31. Panel Mcter Zero Adiustnrent
(Standard&Optio[s)...... .. .....5-10
Phasc Detcctor Zcro Adjuslnrcnt.. . . . . .5-10
Curre0t Source and Current
Srrrk Adlu:trnent.
Pancl Nlctcr/Anaiog Output
A,llrrstrrrerrt>.
AmpliruLle Oltscl AJI r.lnrerl .......
I .rg A rrr plite r AJltr:ttrtctt 1..
..4-r0
..........4-l l
5-35.
s-3 7.
5-U9
5-11 .
.5-10
.5-1 1
.s-1I
.s.1 1
lll

Table of Contents
Section
V 543. Input Attenuator Adjustments . . . . .
545. High Frequency Phase Adjustments . .
547. High Frequency Log
AmplifierAdjustment ..........
549. Factory Selected Components. .....
5-51. GencralServicinglnformation. . . .. . .
5-5 3. Caurions
5-55. Assenbly Removal .
5-65. ComponentReplacement.
5-67. Servicing Etched Circuit Boards. . . . .
5-70. Cleaningthe Display Window ......
5-72. Troubleshooting . . . . .
5.74. Cuidelines.
5-76. Syrnptoms.
5-78. Tr,-rubleshool inB Trees.
5"82. MeasurementConditiotrs
5-84. Control Settings . .
5-86. Power Supply Troubleshooting . . . . .
TABLE 0F C0NTENTS (Cont'd)
Page
. .5.12
..5-12
. .5-13
..5-14
..5-15
. .5.1 5
..5.15
. .5.16
..5.16
..5.16
..5.18
..5.18
..5.18
..5-18
..5-18
..s-18
. .5.r 8
Section
VI REPLACEABLE PARTS
6-1. lntroduction .... ..........6.1
64. Ordering Information . ......6-l
6-6. Non-Listed Parts . . . . .......6-l
6'8. Proprietary Parts . . . . .......6-1
Model 3575A
Page
. . 5 -,i
..5-l
..5.E
APPENDICES
A. CODE LIST OF MANUFACTURERS
B. SALES AND SERVICE OFFICES
C. BACKDATING
Figure Page
l-1. Model 3575A Gain-Phase Meter . . . . . . . . . . . . . . 1'0
2-1. Power Cords ..........2-l
3-1. Front Panel Description ...........3-2
3-2. Rear Panel Description ...........3-3
3-3. Power-Line Ground Loop .........3-3
34. Source-Induced Ground Loop .... ...........34
3-5. Power lnput Module A, B and C . . . . . . . . . . . . .3-j
3-6. dBV to Volts Conversion ..........3-8
3-7. Worst Case Error Produced by
Odd Harmonics .......3-9
3-8. Simple RC Network . . . . . . . . . . . . . .3-9
3-9. Remote Pin Connections .........3-12
3-10. Flag Timing Delayed Mode .......3-14
3-1 1. Flag Timing Non-Delayed Mode .. . . . .. . . .. .3-14
4-1. Simplified Block Diagram .........4-l
4-2. Phase Difference + 60 Degrees . . . . . . . . . . . . . . . 44
4-3. Phase Detector Output .. ... -.... .44
4-4. Phase Control Filter Output . . . . . . . . . . . . . . . . 4-5
4-5. Basic Filter CDnfiguration .........4-5
4-6. Phase Control Logic Functional Block
Diagram . ... -.... .. . -4-6
4-1. Logic Gates... -.......1-7
4-8. Aand BInPhase -No Distortion . . . . . . . . . . . . . 4-8
,1-9. Even Harmonics Cancelled . .. . ... ..4-9
4-10. A and B Clean - No Error ..-.......4-9
4-11. l-arge Error Produced by Noise . ... -.. -......4-9
4-12. Panel Meter Block Diagram . ......4-11
4-13. Analog and Digital Timing ...,,.4-13
Figure
4-14. Timing Circuits and Functional
Block Diagram
5.1 . Power Splilter. . .
5-2. Arnplitude and Phase Accuracy Checks . . . . .
5-3. Shunt Capacitance Check
54. R/C Phase Shifr Network .
5-5. Removing the Front Panel, Panel Meters
andAl2 . ........5-17
5-6. Location of Main Assemblies and
Adjustments ,...5-21/5-12
5-7-" Location of Panel Meter
Adjustments ... .5-2115-22
Amplitude TroubleshootingTree ........5.23'5.:4
Dig.ital Panel Meter Troubleshooting Tree .5-25/5-26
Phase Troubleshooting Tree .. .5.27'5.28
Phase l,ogic TroubleshootingTree .......5-29/5-30
Mechanical Parts (Main Frame) . . . . . . . . . . . . . 6.17
Mechanical Parts (Panel Meter) . . . . . . . . . . . . . 6- 1 9
Functional Block Diagram ......7-5 7-o
Preamplifier (Al/A2) and Log Converter
(A3/A4) Schematics and Component Location
Diagrams . ........7-711-8
7-3. Phase Detector (A5) Schematic
and Component Location Diagram . . . . . . 7 -9 l7 -10
7-4. Current Source (46) and Phase Control
Logic (Al 1) Schematics
and Component Location Diagrams .....7-ll 17-12
7-5. Phase Control Filter (A7) Schematic
and Component l-ocation Diagram .....7-1317-14
LIST OF ILL USTBATIO NS
5-8.
5-9.
s-10.
5-11.
6.1 .
6-2.
'7-1.
7.2.
1V

Model -1575A
Figure
7-6. Funct r.,n Srr1l.hrnS(A8)and Front
Pin.'l S\\ itihinr ( .\ I -l ) Schematics
rnd C(rrrp!)ianI L!)calion Diagrams . . .
7-7. Ourpul Fiher r.\') Al0) Schematic
and Conrpr,n.'nt LLrclrlion Diagram . . .
7-8. Pan.'1 \leter t \10. Al 1. A21) Schematics
rnd Conp.,nen t L,rcltion Diagranrs
Figure Page
7-9. Powcr Supply (Al4) and Power Supply
Mother Board (Al5) Schematics
and Component Location Diagrams .. .. .7-2111-22
7-10. Interface Board (Al68) Schenratic
and Conrponent Location Diagram .....7-2317-21
7-l l. Panel Meter Connector (Al 2A, A l2B) Schcmatics
and Component Location Diagrams . . .1-2517-26
LIST 0F ILLUSTRATI0 NS (Cont'd)
Page
..7-ts11-t6
. .7-t7l7-t8
.7 "1911-20
Tahle of Contents
Page
. . .4-t8
....5-l
....5.5
....5-6
....5-9
...5-1.1
...5,19
....6-2
....1-l
LIST OF TABLES
Table
l-1. Spe. it.;r t .
l -2. General lnlornlalion
l-3. A.'ir...,r c5 Supo .(J
l -4. A(.(r.,rrrc] \\,il,bl- ........
3-1. lrpiurl setL.. -' [.nrc ....
3-2. Eiicit' \ ,r.c \lr'.rnrzcd
j-j. ReJ..,1.,..1 l,pFpruhL, ....
J-,1. Prirrre-C, l.lr:rrr r C.,Jrrr- ... ..
3-5. Prrrrtir (",1 1'1111 ,., t-, Jr,: .
4-1. Filter C.,r.t- . I.,-ri
1-2. nre.lr 'rJ D(r,.r. r Ou-pLrt . . . .
,l--1. Err.rr C,,r'.'.r ' f.l,rrti, tr' .
4-4. Amplit u,ic F.lrcrion Siritching
Page
.,.,1{
....r-).
....11
.. . . t4
....3-5
....1,9
... -t- 10
...3-15
. . .3-15
....1.6
....4.1
....4-9
. . . 4-10
Tabie
-1.5. Panel \,letcr Suitehing L,'rii .......
.l-6. Variable Time Delays
5-1. Recommerlded Test Equipment.....
5-2. Amplitude and Phase Accuracy Checks
5-3. High Level Accura(y Clreck. . . . . . . .
5.,1. P,,wcr Suppll Checks
5-5. Fr.'t,rr1 Selectcd Component. . . . . . .
J r'. P,,vys1 Supply Rating:
'.-1. ReplarcahleParls....
7-t .
7-2.
7-3.
Assembly Cross Relerence .......
Morher Bo.rrd Pin Conne.tions . . . . , . . , . , .7-31'74
7 -2317 -24
Truth Tahle for Remote

Section I
3575-A-2843
'r.,, ,;i[ ; '{ir
&w{e
;t
Figure 1-1. Model 35754 Gain.Phase Meter.
Model 3575A
Table 1-1. Specifications.
PER FORMANCE RATING
Phas6 Accuracy (At Analog Outpur)*
Amplitude Accuracy (Al Analog Output)+'
'Conditions:
'l) Temperature Range 15o to 35o C.
2) Lowest applicable Voltage Range settings must be
3) Lowest applicable Frequency Range s€tting must be
4) Analog Output Voltage-10mV per degree with
> 2 Megohm load resistance.
5) Phase Stability and Accuracy is specified for a period
o{ 90 days;fter calibrarion.
**Conditionsl
1) T€mperature Range 150 to 35o c.
2) The accuracy of ratio (B/A) measurements is deter-
mined by the lowest input level and highest input
frequency. lf the two input signals are nol of the same
frequency, add I 0.5 dB to existing ratio tolerances.
3) Analog Output voltage = 10 mV per dB/dBV with
> 2 I\,4egohm load resistance.
4) Amplitude Stabi,ity and Accuracy is specified for a
period of 90 days after calibration.
Panel Meter Accuracy: t 3 counts (0.3 degrees, O.3dB/dBV)t
tl!4ust be added to Amplitude Accuracy and Phase Accuracy
specifications to obtain total error tolerances for panel
meter readings.
Input Shunl Capacilance: < 30 pF (Also see lnput lmpedance
listing in Table 1-2.)
t-0

Model 3575A
I
Sectiorl I
SECTIO N
GENEBA[ INFOR ATION
dBV (l V rms = 0 dBV). Input levels from 0.2 mV rms
(" 74 dBV) to 20 V rms (+ 26 dBV) can be measured with
0.1 dBV resolution in two voltage ralges. When bg B/A is
selected, thc panel rneter indicates the relatiye amplitude of
the two input signals in dB. The display range for relative
measurements is from - 100 dB to + 100 dB with 0.1 dB
resolution. Since the two input channels each contain ac/dc
corverters and are totally indgpendent, relatiye measure-
ments can be made between two signals that dilfer in
frequency.
1-7. The 3575A amplitude functions are particularly useful
fbr measuring gain, attenuation and other characteristics
where amplitude comparison is required. The I-og B/A
function eliminates the need for separate input and output
measurements and time conslming difference calculations.
1-8. Mlen Phase Dsplay is selected, the 35754 measures
the phase difference between two input signals. The phase
measurement range is from - 180 degrees to + 180 degrees
with 12 degees overrange and 0.1 degree display reso-
lution. Due to the wide dynalnic range of the instrumelt,
phase difference can be measured between two signals that
differ in amplitude by as much as 100 dB.
l-9. An accurate phase meter is of little value unless the
accuracy oan be maintained in the presence of troise and
distortion. Udike conventional phase meters, the 3575A
uses two phase detectors rather tian a single phase
detector. This, in conjunction with a highly effective error
correction scheme, greatly reduces the elfects of noise and
distortion on phase readings.
1-10. SPECtFICATT0NS.
l-11. Table l-1 is a complete list of the Model 35754
critical specifications that are controlled by tolerances.
Table l-2 contains general information that delcribes the
operatirg characteristics of the Model 3575A.
I-12. Any changes ill specifications due to manufacturing,
design, or traceahility to the U.S. National Bureau of
Standards are included in Table l-l in this manual_
Spscficatiols listed in this manual supersede all previous
specfications for the Model 3575A.
1.13.0PTr0NS.
1-1.1. There are presently three instrument and two acces-
sory options available for the Model 3575A. These options
are as follorvs:
I
M
1.1. D ESCRTPTT0 N.
1'1. The Hewlelt-Packard Model 1575A Gain-Phase Meter
is a versatile. wide-range ac voltage analyzer which affords
diect. convenicnt mcasurenent of amplitude and phasc
paranletcrs. Thc nrajur featurcs of the instrument includg
broadband fiequertcl response, wide dynamic range, digital
readout plus a unique detgction soheme which ensures
accurate phase measuremcnts in the prescnce of noisc artd
distortion. These standard leatures, along with a variety ol
options including dual panel meters, BCID output and
remote control. nrake ths -3575A a truly flexible instrurnent
that is well suited for bench or systems applications.
l-3. rhc broadbrnd liequency response of the Model
3575A extends frorl I Hz to l3 Nlllz in four overlapping
frecluencl' rartges- For JnaxiJnum operating corlvenience,
each range is designed to cover a wide band of frequencies
while range seleciability allows the user to optinrize
measuremenl accuracv ar:d scttling tinle over the entire
frequencl spe{l.unr.
l-4. The -1575A is equippcd with two independent input
clunnels. Each channel provides an lJodB dynamic range
which allorvs "hands ,rff" operatioii with a wide range of
input levels. In addition, each channel is equipped with a
20dB input attenurtor rvhich provides an extended oper-
ating capabiiit) ol 100 dB in two voltage rangcs. Input
sensitivity is fron 0.] mV rnrs b l V mls on the lower
range and I mV nrrs to 20 V rins on the higher range. The I
Megohm ( 30 pF input impedance of each channel permits
the use of l0:l divider probes which further extend the
]rl&rinum input level to ]00Vrms and the overall oper-
ating range to I 20 d B.
l-5. The i575A.ontains a buiit-in dc digital voltmeter
which providcs ! direcl indication ol amplitudc or phase on
a 3 l/2 digil (LLD) display. Lighted annunciators oo the
panel rlletcr indicatc dB V, dB or degrees dependinB on the
paranreter being rneasured. Thc pancl nrctcr displa) is deter-
nlincd b) thc iiont panel Displa) switch rvhich permits
selection oi AurplitLrde or Phase presentatiorl. For recording
purposcs. ar1 Analog Output (BhvC) connector is providcd
on the rear panel ol thc instrument. The Ana)og Output
supplies a dc voltage proporlional to the panel nteter
reading.
l-6. Wren Amplitude Display is selected, the panel Ineter
presentation is controlled by the ftont panel Amplitude
Func'!io11 switch which permits selection of three different
functiols. These tunctions are Log A, Log B and Log ts/A.
When Log A or Log B is selected, the panel meter indicates
the logarithrnic amplitude oI the respectiye input signal in
1-l

Section IModel 35 75A
* Field installable option kits are av6ilable.
** Options 002 and 003 are identical
except for assertion states of BCD
ourp(s (se€ Table 1-2).
Option Factory lnsralled*
Dual Panel Meters
Dual Panel Meters,
8CD Outputs and
Remote Control
Kit, Rack lvlount
Additio'ral Manual
Ofiion 001
Option 002
Optio'n 002,
003**
Option 908
Option 9'10
Table'l-2. General lnformation.
INPUTS
Fron! Panel lnputs: Female BNC connectors
lnput lmpedance: 1 [.4egohm (nominat) shunted ty < 30 pF
Rear Pan€l lnpuls: Holes are p,ovided on the rear panet for
installing BNC input connectors in ptace of rhe front panel
input connectors. When reaFpanel inputs are used, the shunt
capacitance increases to approximately 40 pF (not compat-
ible with 10:1 divider probes).
ANALOG OUTPUTS
Connecrors: Female BNC connectors, tabeted ANALOG OUT-
PUI 1 and ANALOG OUTPUI 2 are tocared on the rear
panel of the instrument. Analog Output 2 is used only in
instruments equipped with dual panet metsrs loptions OO1
and 002).
Resistanc€: 1 Kilohm {nominat)
Output Voltaq6:
Amplitude l!4easurements: 1O mVdc per dBldBV with
> 2 Megohm load resistance.
Phase Measurements: 10 mvdc per degree with > 2 M€gohm
load resistance.
RESPONSE TIME
Typical S6ttling Tim€: (rollowing a chanqe in
DISPLAY MODES
Amplitude or Phase {front panel DISPLAY switch)
AMPLITUDE MEASUREMENTS
Amplitudo F'rnctions: AdBV, BdBV, or B/A (front panel
AMPLITUDE FUNCTION switch)
Display Rango (AdBV, BdBV): -74.0dBV to +26.0d8V (in
two Voltage Ranges)
Display Rangs (B/Al: - 100.0dBto+ 100.0d8'
' Both input signals must be within the range of 0.2 mV rms
to 20 V rms.
Display Resolution: 0.1 dBV,0.'l dB
Amplitud€ Refer€nce (A dBV,BdBV): 1 Vrms=0dBV
R6f6ronce channel (B/A)i channel A'
' A neqative reading means that the signal applied to Channel
B is lower in amplitude than the signal applied to channel
A; a positive reading means that the signal applied to
Channel B is qreater in amplitude than the signal applied
to Channel A.
PHASE MEASUR EMENTS
Phas€ Measuremsnt Banger - 'l80 degrees to + 'l80 degrees with
'12 degrees overrange
Display Resolution: 0-l degr€€
Phss€ Referenco: A or -A (front PHASE REFERENCE
'1) Channel A is the reference channe,. A negative reading
means that B lags A;a positive reading means that B leads
'2) Wirh rhe Phase Reference set to "A, Channet A is
inverted and the phase reading is offset Lly 180 degrees.
Error lntroduced by Noise: < 2 degrees {nominal) for a I V
10 kHz sine wave and 1 MHz gaussian noise on one channel
with 30dB signal to noise ratio using the 100 Hz to I MHz
Frequency Range.
Error Introdrrc€d by Distortion:
Even Harmonics: Cancelled - No Error
Odd, ln+trase Harmonics: No Error
input parameters):
907.*
Seril.d
17 sec.
1.7 sec.
0.17 sec.
17 ms.
100%r
Se lad 95 0/o '
Seril6d
RANGES
Frequency Rang€: 1 Hz to i3lvlHz jn four ranges:
1 Hz'1 kHz
10 Hz - 100 kH2
100Hz-1MHz
1 kHz - 13 MHz
l H2 to
10 Hz to
100 Hz to
1 kHz to
30 sec.
3 sec.
0.3 sec.
30 ms.
20 sec.
2 sec-
0.2 sec.
20 ms.
kHz
00 kH2
MHz
3 MHz
Dynamic Range: 80 dB
Operating Range (Each Channel): 100 dBin two ranges:
0.2 mV rms to 2 V rms (, 74 dBV to + 6 dBV)
2 mV rms to 20 V rms (-54 dBV ro + 26dBV) Odd, Out-of,Phase Harmonics: < 0.6 degrees (nominat
when total odd harmonic distortion is more than 40d
below the fundamental
Percent of final reading
1-2

Model -i5 7-i.{ Section I
Table 1.2. General Information (Cont'd).
DIGITAL R EA DOUT
Reading Rate rlnrernal Sampling): 4 raadinqs per second
GENERAL
Display: -i : t r:: ,! ih frxed decimat indicator, po ariry sign
a.rd:---_.::r.:
Operating Ternperaiure Range
Storage Temperature .1Oo C 1
Power Requrrements I 15 V
440 H, a0 \'i ^-aximum
Net tle onr 13 : .1 bs
Shipp.|r , r,ir!i: :a bs
: 0o C to + 55o C, untess orher
o+75oC
or 230V i 10'\, 4aH2 b
In 3575A Option 003, 8CD Outpurs are H,qh True
8CD Outputs: Provide parallel trinarv.odecl data thst corre
sponds wiih the respecrive panel meter reading. Fo!rreen
lines for each panel merer ircl!de three 84 2I 8CD
coded disits, a singl€ lrne overange ('1") digit and a
sing le line poiariry indicaror.
Overload Outpurs: Three output llnes, AOL, BOL and
"overload", indicate overlo3d on A, overtoad on B and
overload on A OR B
Romote Contro Lines: Eighi input tines accept para
binary lnstructions for remote co trol of alt front
il obtain panel meter readi,rgs or BCD oulputs init
by the R€mote Measure command. tn the
mode the time is variable and is contro ed by
Frequency Ranqe setring:
functlons, raoses and sertLngs (excepr LINE ON/OFF)
lnterna storaq€ is not provided.
Conlrol lvlodesr Local or Remore (1 conlrot li.e)
Remote lUeasure: 1 conrrot tine'
' ln the Remole Control rnode, the panet meters mUst be
externally rriggered by apply ng a ground true momen
tary pulse (> 1 ors) to the Rernote Measure t,ne each
time E reading is reqLrired. The Remore f\4easure
command shou d nor be apptied for ai teast O 5 ms
following any change that affects rhe Droqrammed
state of ihe irrstrunrent
lsolation. R€more input.nd ourput lines are /1.)/ isotaled.
Trigger Mode: Delayed or Non Delaye.l (1 conrrot tine).
'The trigger mode determ nes the time required to
Delay Time (nominal)
OPIIONS
Dual Panel Merers (Oprion 0O1): The 3575A Option O0t is
eq! pp:d f,r!. du.i pane metersanddua anatog ourputs Ior
sim! tareo!s a..! r!de and phsse presenrarions.
Lefl.Ha.cr P:.. '!'eter tndrcates A dBV, B dBV or B/A as
deter-.-pd b! the A,np itude Funcrion switch seiting.
Righl Hard Pe". lrleler: lndicates B dBV or phase as deter
m red br ihe Ampt rude B/Phase swirch serrinq.
Dulr A.a oo Ourputs Re,rr panet 8NC connectors provi.l_-
dc ourprr vclrages rhat correspond wth rhe resOecrive
p.ner rr.1e. r!.€di.gs (a so see Anatoq Ouipur headino).
Dual Panel Meters, BCD Output and Remore Controt {Options
002, 003): The 3575A Options 002, and 003 are equipped
u/ith dLra p€.pi rn.lers and dual analog outputs ($me as
Optio. 001) p,!5 dual BCD outpuis and a complere remore
conrr ol caoabl tv
I
lHrtolkHz
l0 Hz ro 100 kHz
10O Hz ro 1 MHz
1 kHz ro 13 MHz 0 66 secords
ln the Non-Delayed mode, the rneasurement rime is
fixed at 600 ms regardlass ()1 the Frequency Range
serting-
Data Flags: + Data Flag and - Dara Flag (2 ourplr tines)'
'Provrde a "Data Readv" indication to the exrerna
controller. Flags are "set" by the Rernote [\4easur€
pulse and reset" a1 rhe erd of the d€lay lTriqqer
N4ode) cycle
Remote Loq c The 35754 Oplion 002 uses Low True TTL
logic lcr BCD outputs and remote controt tines. The
3575A Oprion 003 uses Hiqh True TTL toqic for BCD
Outpui! a.d Low True TTL logic for remore conrrol
"O' | +2.1Vto+5V I Openor*2.4Vto+5V
"1" | 0Vio+04V l Gnd.or.0.5Vro+0.4V
,z --r \
/.r,\
/il--r \
\ T li:; r / -
\ -*- /\ \.
fir----'') T rl
| !:r !j
l! ,n l
, i!
I-l

Section I
l-15. For further information concerning these options.
refer to Table l-2 (General Infonration) or &ction Ill in
this manual or contact the nearest -hp- Sales and Seryice
Olfice.
1.16. ACCESSoRIES SUPPUED.
l-17. Table 1-3 is a list cif accessories supplied with the
Model 3575 A.
1.18. ACCESSOBIES AVAILABLE.
t-19. Table l-4 is a list of Hewlett-Packard accessories that
are available for use with the Model 3575A.
1.20. INSTHUMENT AND MANUAT IDENTIFICATION.
l-21. Hewlett-Packard uses a two-section serial number.
The first section Grefix) identifies a series of instruments.
The last section (suffix) identifies a particular instrument
within the series. If a letter is included with the serial
number, it identifies the country irl which the instrument
was manufactured. If the serial number of your instrument
is lower than the one on the title page of this manual, refer
to Append8 C for backdating information that will adapt
this manual to your insfument. A]l correspondence with
Hewlett-Packard should include the complete serial
number.
Model 3575A
Table 1-3. Accessories Supplied.
Descrlption Ouanrry | .hp- Part No.
Inrerrd,p Connei ror I I ea. | 1251.0086
(Opt.002,003)
ac(Pssory <.r I I ea. I 03575-Ba4l l
lncludes the followlng
PC B^.,d E.renoo, r22 pin) | I ed. | 5060 5980
PC Bo"rd L rrpnoer r12 pin, | 1 ea. | 5060-5988
PC Bo"rd F rrende, r l0 oinr I 1 ea. | 5060-598 /
Table 1-4. Accessories Available.
'hp- Mod€l D6!cription
10004A
456A
562Al6C
11048C
1 1094 B
11095A
5060-8739
Voltage Divider Probe (miniature)
AC Current Probe
Printer Cable
(for 50504 and 50558 Printers)
50 Ohm Feed-Thru Termination
75 Ohm Fe€d-Thru Termination
600 Ohm Feed'Thru Termination
Rack Mountinq Kit
t4