Agilent Technologies 85037A Service manual

Operating and Service Manual
Agilent Technologies
85037A/B
Precision Detectors
Serial Numbers
This manual applies directly to Agilent 85037A/B detectors with serial
number 00101 and above.
Part Number: 85037-90013
Printed in USA
October 2002
Supersedes November 2001
© Copyright 1992–1993, 2001, 2002 Agilent Technologies, Inc.

ii
Notice.
The information contained in this document is subject to change without notice.
Agilent Technologies makes no warranty of any kind with regard to this material,
including but not limited to, the implied warranties of merchantability and fitness for a
particular purpose. Agilent shall not be liable for errors contained herein or for incidental
or consequential damages in connection with the furnishing, performatnce, or use of this
material.
Hewlett-Packard to Agilent Technologies Transition
This documentation supports a product that previously shipped under the
Hewlett-Packard company brand name. The brand name has now been changed to Agilent
Technologies. The two products are functionally identical, only our name has changed. The
document still includes references to Hewlett-Packard products, some of which have been
transitioned to Agilent Technologies.

Certification
Agilen
tT
ec
hnologies certies that this pro duct met its published
specications at the time of shipmen
tfrom
the factory
. Agilen
t
further certies that its calibration measuremen
ts are traceable to the
United States National Institute of Standards and T
echnology
,to
the extent allow
ed b
y the Institute's calibration facilit y
,and to the
calibration facilities of other In
ternational Standards Organization
mem
bers.
DOCUMENT
A
TION
WARRANTY
THE MA
TERIAL CONT
AINED IN THIS DOCUMENT IS
PR
O
VIDED \AS IS," AND IS SUBJECT TO BEING CHANGED,
WITHOUT NOTICE, IN FUTURE EDITIONS. FUR
THER, TO
THE MAXIMUM EXTENT PERMITTED BY APPLICABLE
LA
W, A
GILENT DISCLAIMS ALL WARRANTIES, EITHER
EXPRESS OR IMPLIED WITH REGARD TO THIS MANUAL
AND ANY INF
ORMA
TION CONT
AINED HEREIN, INCLUDING
BUT NOT LIMITED TO THE IMPLIED W
ARRANTIES OF
MERCHANT
ABILITY AND FITNESS F
OR A P
AR
TICULAR
PURPOSE. A
GILENT SHALL NOT BE LIABLE F
OR
ERR
ORS OR F
OR INCIDENT
AL OR CONSEQUENTIAL
DAMA
GES IN CONNECTION WITH THE FURNISHING,
USE, OR PERF
ORMANCE OF THIS DOCUMENT OR ANY
INF
ORMA
TION CONT
AINED HEREIN. SHOULD A
GILENT
AND THE USER HA
VE ASEP
ARA
TE WRITTEN A
GREEMENT
WITH W
ARRANTY TERMS CO
VERING THE MA
TERIAL IN
THIS DOCUMENT THA
TCONFLICT WITH THESE TERMS,
THE W
ARRANTY TERMS IN THE SEP
ARA
TE A
GREEMENT
WILL CONTROL.
Assistance
Pr
o
duct maintenanc
eagr
e
ements and other customer assistance
agr
e
ements ar
eavailable for A
gilent pr
o
ducts.
For any assistanc
e, c
ontact your ne
arest A
gilent T
echnologies Sales
and Servic
e Oc
e. R
efer to Table 6- , \Contacting A
gilent" in
Chapter 6.
iii

Safety Notes
The follo
wing safet
ynotes are used throughout this manual.
F
amiliarize y
ourself with eachof the notes and its meaning before
operating this instrumen
t.
Caution
Caution
denotes ahazard. It calls atten
tion to apro cedure that, if
not correctly performed or adhered to, could result in damage to or
destruction of the instrumen
t. Do not pro ceed bey
ond a
c
aution
sign
un
til the indicated conditions are fully understoodand met.
W
arning
Warning denotes a hazard. It calls attention to aprocedure which, if
not correctly performed or adhered to, could result in injury or loss
of life. Do not proceed beyond a
warning
note until the indicated
conditions are fully understood and met.
Instruction Man
ual
L
The
instruction man
ual
sym
bol. The product is
mark
ed with this sym
bol when it is necessary
for the user to refer to the instructions in the
man
ual.
ICES/NMB-001
This ISM device complies with Canadian
ICES-001.
Cet appareil ISM est conforme ala norme
NM -001 du Canada.
iv

Contents
1. General Information
In
tro duction ............. . . . . . 1-1
Pro duct Description .... . . . . . . . ..1-1
Instrumen
ts Co
vered b
yThis Man
ual ......1-1
Accessories ............... . . . 1-2
Equipmen
tRequired but Not Supplied . . . . . . 1-2
Recommended Test Equipmen
t.........1-2
Reection or T
ransmission Measuremen
ts ....1-2
A
CDetection ......... . ......1-2
Specications and Supplemental Characteristics ..1-2
2. Installation
Safet
yConsiderations ...... . . . .....2-1
Initial Inspection ............. . . . 2-1
Preparation for Use ...............2-2
Electrostatic Disc
harge (ESD) ... . .....2-2
Static-Safe W
or station ...........2-2
Static-Safe Practices ............2-2
P
o
w
er Requirements .............2-3
Cable Lead Iden
tication ...... . . . . . 2-3
Mating Connectors ..............2-3
Connecting an 85037A/B ...........2-3
Mating aPrecision 3.5 mm Connector to an SMA
Connector .............. . 2-4
Electrical P
erformance ..........2-4
Operating En
vironment . . . . . . .......2-6
Storage and Shipmen
t....... . . . . . . . 2-6
Environmen
t. ............ . . . . 2-6
P
ac
aging ...... . ...........2-6
Returning a Detector for Service . . . . . . . . . 2-7
3. Operation
Operating Theory . . . . . . . . . . . . . . . 3-1
AC Detection . . . . . . . . . . . . . . . . 3-1
DC Detection . . . . . . . . . . . . . . . . 3-1
Features . . . . . . . . . . . . . . . . . . . . 3-2
Connector Torque Values . . . . . . . . . . . . 3-2
Operator's Chec . . . . . . . . . . . . . . . . 3-3
Operating Mo des and Sp ecications . . . . . . . 3-3
Dynamic Accuracy . . . . . . . . . . . . . . 3-3
Frequency Resp onse . . . . . . . . . . . . . 3-3
Measurement System Conguration . . . . . . . . 3-4
Contents-1

DC Detection Measurements . . . . . . .....3-5
Enabling the DC Detection Mo de ....... 3-5
Ma ing Accurate DC Measurements . . . . . . 3-5
Operation . . ............ . . . 3-5
Zeroing an 85037A/B .... . . . ... . . 3-5
A
C Detection Measurements . . . . . . .....3-6
Ma ing Accurate A
CMeasuremen
ts ......3-6
Characterizing the Detector (P
erforming aP
o
wer
Calibration) . . . . . . ..........3-7
4. P
erformance T
ests
In
tro duction . . . . . . . ...........4-1
Equipmen
tRequired .............4-1
Return Loss at aNominal
0
10 dBm .... . . . 4-2
Description .. . . . . . ..........4-2
Pro cedure ................. . 4-3
F
requency Response at aNominal
0
10 dBm .. . . 4-5
Description ........ . ........4-5
Pro cedure . . . . ..............4-6
Conguring the System ..... . . . . . . . 4-6
Measuring the Source ............ . 4-7
Measuring the Detector ............4-7
Computing the Maxim
um Error . . . . ....4-8
Dynamic P
o
w
er Accuracy ......... . ..4-10
Description .................4-10
Pro cedure ... . ..............4-10
First Alternate Dynamic P
o
w
er Accuracy ..... 4-11
Description .................4-11
Second Alternate Dynamic Po
w
er Accuracy ....4-12
Description ........ . . . ......4-12
Pro cedure .... . . . . . . . .......4-12
5. Adjustmen
ts
In
tro duction ........... . . . . . ..5-1
Coarse Zero Adjustmen
t.............5-2
Description . . . . . . . . . . . ......5-2
Pro cedure ..... . ............ 5-2
F
eedthrough Nulling Adjustmen
t. . . . . . . . . 5-3
Description . . . . . . . . . . . . . . . . . 5-3
Pro cedure . . . . . . . . . . . . . . . . . . 5-3
6. Replaceable P
arts
Intro duction . . . . . . . . . . . . . . . . . . 6-1
Ordering P
arts . . . . . . . . . . . . . . . . . 6-1
Contents-

. Service
Error Messages ........... . . . . . . 7-1
Repair ... . . . . . . . . . . . . . ....7-1
Replacing the Detector . ...........7-2
Remo
ving the Co
v
ers . . . . . . . . . . . . . 7-2
Replacing the Cable Assembly (W1) . . . . . .7-3
A. Caring for Connectors
Visual Inspection .. . . . . . . . .......A-1
Cleaning . . ................A-1
Mec
hanical Inspection ........ . . . . . A-2
Index
Contents-3

Figures
2-1. Example of a Static-Safe W
or station ......2-2
2-2. Using Precision 7mm Connectors ....... 2-3
2-3. SMA and 3.5 mm Connector Cross-Sections and
SWR P
erformance .............2-5
3-1. Detector F
eatures ......... . . . . . 3-2
3-2. T
ypical Measurement Setup . . . .......3-4
4-1. Return Loss Setup ..............4-2
4-2. F
requency Response T
est Setup ..... . . . 4-5
4-3. F
requency Response Graph ... . ......4-9
4-4. Dynamic P
o
w
er Accuracy T
est Setup ......4-11
4-5. First Alternate Dynamic P
o
w
er Accuracy Test Setup 4-11
4-6. Second Alternate Dynamic P
o
w
er Accuracy T
est
Setup . . . ...............4-12
5-1. Coarse Zero/F
eedthrough Nulling Adjustmen
t. . 5-2
5-2. Coarse Zero Adjustmen
t.. . . . .......5-3
5-3. F
eedthrough Nulling Adjustmen
t........5-4
6-1. Detectors and Cable Mar
er Kit ........6-2
6-2. Mo dule Exc
hange Program . .........6-4
7-1. Remo
ving the Detector Co
v
ers ...... . ..7-2
7-2. Cable Connections ..............7-4
T
ables
1-1. Agilen
t 85037A Standard
1
. . . . . . .....1-3
1-2. Agilen
t85037B Specications
1
...... . . . 1-4
1-3. Supplemen
tal Characteristics ......... 1-5
1-4. Recommended T
est Equipmen
t. . . . . . . . . 1-6
4-1. Return Loss Equipmen
tTable . . . . . . . . . 4-3
4-2. F
requency Response Equipmen
tT
able . . . . . . 4-6
4-3. W
or sheet . . . . . . . . . . . . . . . . . . 4-9
4-4. Additional Equipmen
t . . . . . . . . . . . . 4-12
4-5. T
est Record for 85037A . . . . . . . . . . . . 4-13
4-6. Test Record for 85037A Option 001 . . . . . . . 4-17
4-7. Test Record for 85037B . . . . . . . . . . . . 4-21
6-1. Miscellaneous Parts . . . . . . . . . . . . . . 6-2
6-2. Replaceable Parts and Accessories . . . . . . . 6-3
6-3. Contacting Agilent . . . . . . . . . . . . . . 6-5
Contents-4

1
General Information
Introduction
This man
ual con
tains information on operating, testing, and servicing
the Agilen
t 85037A and 85037B precision detectors. Figure 6-1 sho
ws
the detectors and the supplied cable mar
er it.
Product Description
The Agilen
t85037A/B precision detectors are specically designed
for use with an Agilen
t8757D scalar net
w
or analyzer and are
not compatible with the Agilent 8757A/C/E, 8756, or 8755 scalar
net
w
or analyzers. These dual-dio de detectors ma
ybeused in either
A
Cor DC detection mo des. F
or impro
v
ed po
w
er measurement
accuracy v
ersus frequency
,eac
hAgilen
t 85037 series precision
detector includes detector-sp ecic frequency response data, stored in
an in
ternal EEPR
OM, whic
his automatically read b
y the 8757D.
When used in conjunction with the 8757D's in
ternal po
w
er calibrator
(Option 002), these detectors pro
vide the maximum absolute po
w
er
measuremen
taccuracy
.
Agilen
tDetector Connector T
ype
85037A T
ype-N (m)
85037A Option 001 Precision 7mm
85037 Precision 3.5 mm (m)
Instruments Co
v
ered by
This Manual
Eac
hdetector has aunique serial n
umber. The con
ten
ts of this
man
ual apply directly to detectors with serial n
um
bers listed on the
title page.
General Information 1-1

Accessories
T
able 6-2 lists accessories a
v
ailable for use with these detectors.
Equip ent Required
but Not Supplied
Recommended T
est
Equipment
T
able 1-4 lists the equipmen
trequired to test the detectors. Y
ou
ma
ysubstitute an
yequipmen
tthat meets the indicated critical
specications.
Reflection or
Transmission
Measurements
Reection and transmission measuremen
ts require the follo
wing
equipmen
t:
One or more detectors.
An Agilen
t8757D scalar net
w
or analyzer.
One
of the follo
wing:
Adirectional bridge.
Adirectional coupler.
Asw
eep oscillator or syn
thesized sw
eeper.
F
or ratio measuremen
ts use:
Apo
w
er splitter or dual directional coupler.
A
CDetection
A
Cdetection requires the equipmen
tlisted abo
v
e,
plus
either asignal
source capable of 27.778 Hz squarew
av
e amplitude mo dulation, or
an external mo dulator.
Specifications and
Supple ental
Characteristics
Table 1-1 and T
able 1-2 list detector specications whic
hare the
performance standards or limits against whic
hy
ou can test the
device.
Table 1-3 lists supplemen
tal (typical, non-w
arranted) detector
characteristics.
1- General Information