Wavetek 1034A Operating instructions

OPERATING AND MAINTENANCE
MANUAL
PORTABLE
RF POWER METER
MODEL 1034A
SERIAL NUMBER _
Copyright 1976 by Wavetek Microwave, Inc.
Printed in the United States of America. The information
comaine£l in this manual is intended for the operation and
maintenance of Wavetek Microwave equipment, and is
not to be used othervtise or reproduced wilhout lhe wriuen
consent of Wavetek Microwave, Inc.
WAVETEK MICROWAVE, INC.
488 TASMAN DRIVE, SUNNYVALE, CALIFORNIA 94089
1499-14166
TEL: [phone] TWX: [phone] TELEX: 371-6460 Code
13 (2-88)
From the library of WØMTU

'\4odeJ l034A
WARRANTY
Wavetek warrants that all products manufactured by Wavetek conform to published
Wavelek specifications
and are Iree from defects in materials and workmanship for a period
of one (1) year from the date of delivery when used under normal operating conditions
and within the service conditions for which they were furnished.
The obligation of Wavetek arising from a Warranty claim shall
be limited to repairing, or
at its option, replacing without charge. any product which in Wavetek's sale opinion proves
to be defective within the scope of the Warranty. In the event Wavetek is not able to modify,
repair or replace non-eonlorming defective parts
or components to a condition as
warrantied within a reasonable time after receipt thereof. Buyers shall be credited for their
value
at the original purchase price.
Wavetek must be notified in writing of the
defect or nonconformity within the Warranty
period and the affected product returned to Wavetek's factory or
to an authorized service
center within (30) days after discovery of such defect or nonconformity.
For product warranties requiring return to Wavetek, products must be returned to a service
facility designated by Wavetek. Buyer shall prepay shipping charges, taxes, duties and
insurance for products returned to Wavetek for warranty service. Except for products
returned to Buyer from another country, Wavetek shall pay for return of products to Buyer.
Wavetek shall have
no responsibility hereunder for any defect or damage caused by
improper storage, improper installation, unauthorized modification, misuse, neglect,
inadequate maintenance, accident or for any product which has been repaired or altered
by anyone other than Wavetek or its authorized representative and not in accordance with
instructions furnished by Wavetek.
Exclusion of Other Warranties
The Warranty described above is Buyer's sale and exclusive remedy and no other
warranty, whether written or oral, is expressed 01' implied. Wavetek specifically
disclaims the implied warranties of merchantability and fitness for a particular pur-
pose.
No statement, representation, agreement, or understanding, oral or written, made
by an agent, distributor, representative, or employee of Wavetel<, which
is not contained
in the foregoing Warranty will
be binding upon Wavetek, unless made in writing and
execuled by
an authorized Wavetek employee. Under no circumstances shall Wavetek
be liable for any direct, indirect, special, incidental, or consequential damages,
expenses, losses or delays (including loss of profits) based on contract, tort, or any
other legal theory.
From the library of WØMTU

Model l034A
TABLE OF CONTENTS
Page No.
Section 1 GENERAL INFORMATION
1.1 Wavetek Microwave, Inc. (WMI)
Model l034A Portable RF Power Meter .......••.•........ 1-1
1.2
Performance Specifications •...........•.••....••..•...•• 1-2
Technical Information Sheet: "Detectors for use
with WMI Scalar Analyzers and Power Meters"
Technical Information Sheet: "Detector Element and
Tracking Resistor Replacement Procedures"
Section 2 INITIAL INSTRUCTIONS
2.1 Receiving Instructions .•••••..••••.•••••••••••••..••••.. 2-1
2.2
Returning the Instrument ..•.•..........•••••••••...•...• 2-1
2.3
Power Requirements .....•...........••........•••...... 2-1
2.4 Chassis Grounding •••.•.........••••.........•••........ 2-1
2.5
Detector Handling ...•.•..•....•...........••..•.•••••.• 2-1
2.6 Accessories ..•.•••.•..•••.•...•.....•.•.••...•...••••• 2-2
Section 4 OPERATION
3.1
Front Panel Controls .•.••.•.••..•...........•.........• 3-4
3.1.1 Power Switch ..•.•..•....••........•••..••.••.••• 3-4
3.1.2 Meter Range Push Buttons .....••••.....••...•••..• 3-4
3.1.3
Zero Button &. Screwdriver Adjustment ............•. 3-4
3.1.4 Cal Button &: Screwdriver Adjustment ..........••... 3-4
3.1.5 Calibration Factor Control {dB) •........•..•.•...•. 3-4
3.1.6 Direct 50 /75 Adapter Switch •..•..••••..•....•. 3-4
3.2 Internal Control, Line Voltage Switch .•......•.•....•...•• 3-5
3.3 Front Panel Meter •....•...•.......••........•..•.....•. 3-5
3.4 Front Panel Connectors ....•..•.........•.•.•• , •..•••.•• 3-5
3.4.1 Power Input ........•........•........•..•....... 3-5
3.4.2 Output BNC Connector ....•..•.•..••••........... 3-5
3.4.3 Cal Output lOmW, Type N Connector ..•....•....... 3-5
ii
From the library of WØMTU

Section 4
Section 5
Section (,
Model 1034A
TABLE OF CONTENTS (can't.)
3.5 Operating Procedure ...•..•.....•••••...•.•.••..•.....•. 3-5
3.5.1 Use
of the Analog Output .•.•••................... 3-6
ELECTRICAL DESCRIPTION
4.1 Introduction ............•...........•.................. 4-4
4.2
Block Diagram Description .......•...................... 4-4
4.2.1 RF Detector .....•....•...•...•.................. 4-4-
4.2.2 Thermistor Bridge Amplifier ................•...... 4-4
4.2.3 Preamplifier .................•............•...... 4-4
4.2.4 Compensation Circuit ..................•.......... 4-4
it.2.5 Logarithmic Amplifier .................•.......•.. 4-4-
4.2.6 Full-Scale Range Changing 4-5
4.3
Individual Circuit Block Descriptions ...............•...... 4-5
4.3.1 Input Amplifier ...............•.................. 4-5
4.3.2 Log Conversion Circuit ................•.......•.. 4-5
4.3.3 Square-Law Compensating Circuit .......•...•...... 4-6
4.3.4 Temperature Compensation .............•...•...•.. 4-6
4.3.5 Range Switching ......................•.......... 4-6
4.3.6 Calibrator Oscillator ..................•.......... 4-7
4.3.7 Power Supply .............................•...... 4-7
PERFORMANCE VERIFICA nON TESTS
5.1
General ............................................•.• 5-1
5.2 Equipment Required ................•...•.•.....•.•..... 5-1
5.3 Tracking With DC Voltage ................•.....•••••.... 5-2
5.4 Calibrator Output Level Check ............••.••..•....... 5-3
MAINTENANCE
6.1 Periodic Maintenance .......................•...•....... 6-1
6.2 Internal Adjustments and Test Points .........•...•....... 6-1
6.2.1 Description of Adjustments 6-1
6.2.2 Description of Test Points .................•...•... 6-2
iii
From the library of WØMTU

Section 7
Section 8
Section 9
Table 4-A
Table 5-A
Figure 1-1
Figure 3-1
Figure 4-1
Figure 5-1
Figure 5-2
Figure 6-1
Model
l034A
TABLE OF CONTENTS (con't.)
Page No.
6.3 Calibration
6.3.1
Equipment Required ....•.........•....•.......... 6-2
6.3.2 Calibration Procedure ..•...........•.•........... 6-3
6.4 Troubleshooting .......•........••••..••.••••...•....... 6-6
6.5 Semiconductor Devices ..........•..........•........... 6-7
6.6 Access to Internal Components •............•............. 6-7
SCHEMATIC DIAGRAMS
Table of Contents for Schematic Diagrams ....•....•........... 7-1
REPLACEABLE PARTS LISTINGS
Table of Contents for Replaceable Parts Listings ............•... 8-1
MANUAL
CORRECTIONS ..............•........ follows page 8-16
LIST OF ILLUSTRATIONS
(Tables and Figures)
Range Switching Gains and Offsets ....•....................... 4-7
Tracking Performance Tests ...................•.............. 5-1
Model 1034A
Detector Measurement Accuracy
Model 1034A
Front Panel. .....................•.............. 3-3
Model l034A Block Diagram .....•............................ 4-3
Modified Thermal Converter
for Checking the Calibrator Output ........•................•.• 5-2
Fixture for Applying DC Voltage to the Model l034A ...•.....•..• 5-2
Chopper Circuit Timing Diagram ......•........•.•...........• 6-7
iv
1-2
From the library of WØMTU

TEK
M I C ROW A V E,
INCORPORATED
488 TASMAN DRIVE, SUNNYVALE, CALIFORNIA 94089 Tel: [phone]
TWX: [phone]
TECHNICAL INFORMATION
DETECTORS FOR USE WITH WAVETEK MICROWAVE, INC. (WMI) SCALAR ANALYZERS
AND MODEL 1045 AND 1034A
POWER METERS
The purpose of this Technical Information sheet
is to define parameters and specifications perti-
nent to all of the detachable detector options
available for the various WMI scalar analyzer
systems and the Model 1045 and 1034A power
meters. Parameters common to each of the
detector configurations are defined first, and
then individual detector specifications are given.
WMI
offers three different types of detectors for
the above scalar systems and power meters.
These include the single diode and balanced
(dual diode) coaxial detectors, and the balanced
element waveguide detector. The single diode
and balanced coaxial detectors ha vea maximum
power rating of 200m W (+ 23dBm), and cover the
frequency range of IMHz to 18.5GHz or IMHz to
26.5GHz. One version of the single diode detector
(used with the Model 1045 Power Meter) has a
built-in
atlenuator to allow it to measure maxi-
mum power levels up to lOW (+40dBm) CW or
up to 200W (+53dBm) peak. The balanced
element waveguide detector has a maximum
power rating of loomW (+dBm), and is designed
for the frequency range from 26.5GHz to
4O.0GHz.
Coaxial detectors are available with type N,
APC7, and APC3.5 (compatible with SMA)
connectors, and the waveguide detector
comes with a WR28 waveguide (UG-599/U
Flange).
Frequencies down to 100kHz are available on
special order, and various types of 50 to 75
ohm adapters are available for the coaxial
detectors.
HOTH: If it is desired to check the detector/
instrument system performance, refer to the
Performance Verification Test in the Operat-
ing and Maintenance Manual for the particu-
lar instrument.
SINGLE DIODE DETECTOR FEATURES
AND SPECIFICA nONS
Further features and specifications for the WMI
single
diode detector include the following:
o 70dB
Dynamic Range
o Temperature Compensated
o Linearity Compensated
o Frequency Response Curve Da ta
Accuracy: The uncertainty of cali-
bration for the single diode <Ietector
at ImW (OdBm) is 3% to 18GHz and
5% to 26.5GHz
o Flatness: The maximum total varia-
tion of flatness for the single diode
detector WIll be between IdB and
4dB from I MHz to 26.5GHz, depend-
ing on the detector model and in-
strument with which it is used. (See
the reverse side of this sheet.)
o Return Loss: Return loss of the
single diode detector is 25dB from
(MHz
to 2GHz and 20dB from 2GHz
to 12.4GHz with any connector.
With type N or APC7 connectors,
return loss is 18dB from 12.4 to
18GHz and 14dB between 18 and
18.5GHz. When
detectors with
APC3.5
connectors are used, return
loss is 16dB from 12.4 to 18GHz and
14dB to 26.5GHz.
o Measurement Accuracy: Figures 6
and 7 show the measurement accura-
cy for the single diode detectors
used with the power meters. Single
dIode
detectors specified for the
1038-H/V system have a measure-
ment accuracy of O.ldB/lOdB plus
O.5dB at -50dBm
Figure 1. Typico.l Configurations of Wavetek
Microwaves Single Diode Detectors
BALANCED (DUAL DIODE) DETECTOR
FEATURES AND SPECIFICA
nONS
Further features and specifications for the WMI
balanced detector include the following:
o 76dB Dynamic Range
o
Effects of even harmonics are re-
duced, thereby increasing measure-
ment accuracy
o Absorbs low level dc offset voltages
o Very low thermal drift
o Temperature Compensated
o Linearity Compensated
o Input Impedance: 50 ohms, nominal
o
Frequency Response Curve Data
Accuracy: The uncertainty of cali-
bration for the balanced detector is
3%
to 18GHz and 5% to 26.5GHz
o
Flatness: The maximum total varia-
tion of flatness for the balanced
detector is 1.5dB from IMHz to
18GHz and 2dB from 18 to 26.5GHz
o Return Loss: Return loss of the
balanced detector is 20dB from
IMHz to 2GHz, 18dB
to 12.4GHz,
16dB to 18GHz, and
JOdB up to
26.5GHz.
o
Measurement Accuracy: See Figure
4
Figure 2. Wavetek Microwave's Patented
&lanced (Dual Diode) Detector
DETECTOR HANDLING PRECAUTIONS
Any RF detector is, of necessity, a very delicate instrument and must always be handled with care. Care must be taken to avoid
el<ceedlng
the detector's electrical rating through static electricity, power input greater than specified, or use of measuring equipment.
Also avoid mechanical stress that could be caused by dropping or over-torquing the detector. See the Operating and Maintenance Manual
for the appropriate instrument with which the detector is to be used for further details.
(OVER)
1499-16428/2-88/500
From the library of WØMTU

'""'.,...WI'_ • ...,;~
Absolute Maximum Diode
Part Frequency Power Input Without
Replacement
Number Range
Damage (Peak or CW) Connector
Type
Kit No's.
NIO/NS20
System Detectors
15176 lMHz to 18.5GHz
200mW Type N
Balanced
15360
15177
IMHz to 18.5GHz 200mW
APCl Balanced 15360
15285 I MHz
to 26.5GHz 200mW
APC3.5* Balanced 15361
15850 26.5
to 40.0GHz 100mW UG-599U Balanced Not Field
(WR28)
Replaceable
H/V System Detectors
15272 I MHz to 26.5GHz
200mW APC3.5*
Single 15416
13782
lMHz to 18GHz 200mW Type N Single 14016
13783
lMHz to 18GHz 200mW APC7 Single 14016
15882 26.5
to 40.0GHz
100mW UG-599/U
Single Not Field
(WR28)
Replaceable
Model 1045 Power Meter Detectors
13786 lMHz to 18GHz 200mW
Type N Single 14018
13787
IMHz to 18GHz
200mW
APCl Single 14018
14139
lMHz to 18GHz
lbw CW -200W Pk Type N Single 14018
15271
lMHz to 26.5GHz 200mW
APC3.5* Single 15417
Modell034A Power Meter Detector
13780 IMHz to 18GHz I 200mW I
Type N Single 14015
'Compatible with SMA connector
WAVEGUIDE DETECTOR FEATURES AND
SPECIFIC ATIONS
Further features and specifications for the WMl
waveguide detector include the following:
o 70dB
Dynamic Range
o Has a plastic housing to reduce
thermal shock when handling
o Frequency Response ,--urve Data
Accuracy: The relative uncertainty
of calibration for the waveguide
detector is 5% from 26.5 to 40.0GHz
o Flatness: The maximum total varia-
tion of flatness for the wavegu:~e
detector is 4dB from 26.5 to 40.0
GHz
o Return Loss: Return
waveguide detector is
26.5
to 40.0GHz
o Measurement Accuracy:
5
~ -J::~
Figure 3. Wavelek Microwave '5 Balanced
Elemenl Waveguide DeleclOr
INDIVIDUAL INSTRUMENT SPECIFICATIONS
The detector parameters gIVen on tne reverse
side of this Technical Infonnation sheet cover
the specifications that are generally to be ex-
pected of WMl detectors. Some specifications
can be slightly different due to characteristics of
the instrument with which the detector is used.
These deviations are given below, with all other
specifications as given on the reverse side of this
sheet.
Model 10Jl-H/V System
return loss is
14.0dB up to
Temperature: On Figure 5, H/V System
temperature range is 350 to 450C instead of
350 to 500C
loss
of the
> 10dB from
See Figure
INDIVIDUAL SYSTEM OR POWER METER DETECTOR SPECIFICATIONS
+16 [phone] ...a -50 -60
Sign" LOY'I. dBm
Figure 4 Model 1038-N 10 and NS20 Syrtem
Coaxial Detector Accuracy from 30M'Hz to
28.5CHz. (An additional O.2dB 13 added to
the deviation reading for operation from 1 to
30MHz)
Model II>" Power Meter
10 2dB ~-60
I U
I
I
I
:\
rr·l5"C
/
I \
[\
35' . 5O"C
/
.. I
I
1\
/
I
I
~
I
I
15"t5"C
1
-
.--
I
I
I
1.2
.. 1.0
c
1_ 0.8
a:~
i ~ 06
2·g 0.4
~ .~
-; ~ 0.2
:0
.~ 0
Q.
Flatness: With type N or APC7 connectors,
flatness (maximum total variation) is 2.0dB
to 18GHz. With APC3.5 connectors, flatness
is 1.0dB to 18GHz and 2.0dB to 26.5GHz
Return Loss: Same as H/V system
Measurement Accuracy: See Figure 6
to 2dB • ·bOdlllll
O.S
~ ~
c >
f-
-
r--.....
0.'
0.'
0.2
I I
00 to 1 ~.oc
}SO to )OoC
\ , /
/'
'j
c
~I
::
~
0.1
I I
1)0 /0 \~Or:
/
0.0
"0
-10 -20 -30 _JO -so -60
qgllitl Leovtl (dam)
Figure 6 Model 1045 Detector Mea!urement
A ccuracy from 1 MHz to 26.5CHz
10 2dB @ -110
1.S
1.3
2'
L
1.1
-"
a: ..
0.8
~~
25
0.7
;1
;;
0.5
2i
~
0.3
Q.
+ 10 ° -'0 -20 -30 -40 - so -110
n
~
_0' -,S'C
35'; SO'C /
\ /
~5'~~5'C
--
I I
SlgMI Lewel, dIm
Figure 5 Model 1038-N10, NS20, and H/V
S)'!tem! Waveguide Detector Accuracy from
28.5CHz to 40CHz
Model 103-'A Power Meter
Frequency Response Curve Data Accuracy:
The uncertainty of calibration at ImW
(OdBm) is 2% to 12.4GHz and 3% to 26.5GHz
Flatness: 2.0dB to 18GHz
Return Loss: Same as H/V System
Measurement Accuracy: See Figure 7
to ldR a -6OJllm
-10 -20 -30 _JO -SO I -60
I I U
T \ \
r-~ 0° to [)Oc
o 0
/:
f.-
I-- 3~ 10 so ~
I \ I
/'"
I
ISO :0 J5°
0.0
·'0
1.0
~
0.8
H
0.6
0.'
:D
~
0.2
g,
,
~
Signa.l Ltvtl (dlllll)
Figure 7 Model 1034A Detector Mea!ure-
men! Accuracy from 1MHz to 10CHz. (Add
0.2dB to the above for frequencle.! from
IOGHz to 18GHz)
From the library of WØMTU

EK
M I C ROW A V E, INC 0 R P 0 RAT E D
488 TASMAN DRIVE, SUNNYVALE, CALIFORNIA 94089 Tel: [phone]
TWX: [phone]
TECHNICAL INFORMATION
DETECTOR ELEMENT AND TRACKING RESISTOR REPLACEMENT PROCEDURES FOR
DETECTORS USED WITH THE 1038-H/V SYSTEM (PIN'S 13782, 13783, 13784, 15272); THE
MODEL 1045 POWER METER (PIN'S 13785, 13786, 13787, 13838, 13840, 14139, 15271);
AND THE
MODEL 1034A POWER METER (PIN'S 13779, 13780, 13781)
All of the detector part numbers listed in this Technical
I nformation Sheet represent single diode detectors. In the
single diode detector, the detector element is replaced at
the detector end of the cable and the tracking resistor is
replaced at the
instrument input end of the detector cable.
WARNING: Dimensional tolerances of the detectors
are critical. Care must be taken to keep the work area
very clean when performing a diode and resistor
changeout so that dirt and dust cannot get into the
detector.
Before starting any of these replacement procedures, be
sure to read all of the Handling Precautions shown inside
the box at the bottom of this page.
FOR
DETECTOR PIN'S 13779, 13780, 13781, 13782,
13783, 13784,
AND 15272 (1038-H/V SYSTEM AND
MODEL 1034A) USE THE FOLLOWING PROCEDURES:
1. Using Figure 1 on page 3 of this sheet as a guide,
remove the knurled nut that secures the insulator to the
detector. Slide the insulator back along the cable to
expose the metal detector body.
2. Unscrew the cap assembly from the detector housing
assembly.
3. Remove the detector element and, if included, the ring
from the detector housing assembly. (Older detectors
may have a capsule spacer and capacitive washer.
Remove these. They will be replaced by the ring included
in the kit. If your detector has just the ring, replace it with
the ring from the kit.)
4. Late model detectors have only the detector element;
no spacer, washer, or ring. If you r detector has no spacer,
washer,
or ring, then discard the ring from the kit and
replace
just the element as shown in Figure 1. Make sure
that components are correctly seated and pressed firmly
into the detector.
WARNING. Use care when pressing the detector
element into the housing to avoid damaging the
female
socket contacts.
5. Replace the cap assembly onto the detector housing
assembly, and tighten to 30 inch-pounds (4.4 N-M).
Reassemble
the insulator and knurled nut onto the
detector.
Steps6
through 11 apply only to PIN'S 13779, 13780, 13781
6. Using Figure 2 as a guide, unscrew the strain relief
from the connector body.
7. Remove the shrink sleeving from the existing resistor
in
the detector and check its value against thevalue of the
resistor
included in the kit. If they are the samevalue, leave
the existing resistor re-cover it with shrink sleeving).
8. If the resistor values are different, unsolder the
existing resistor and replace it with the new resistor from
the kit at the same point (pins 3 and 4). Be sure to place
shrink sleeving over the new resistor before reassembling.
9. Reassemble by reversing the above steps.
HANDLING PRECAUTIONS
1. GENERAL
ohmmeter's open circuit voltage or short circuit
B. Ensure that all parts are clean. but use extreme
current could easily damage the diode.
Avoid unnecessary handling of the detector care in cleaning them to avoid causing other
element used in the RF detector. prOblems. If a
cleaning solution must be used, use
only ISOPROPYL ALCOHOL, as other solvents can
2. MECHANICAL PRECAUTIONS
A. Static electricity builds up on a person,
affect the materials used in the detector assembly.
especially on dry days, and must never be allowed
The RF detector is a very delicate instrument that
to discharge through the RF detector. Avoid any
C. Reassemble the assembly using minimum force.
can be easily damaged during handling. Possible
exposed leads on the detector input or output.
Normally, the assembly can be HAND-TIGHTENED
excessive return loss or mechanical breakage can
occur. To aVOid problems while installing the
to the point that no space is left between the.
B. Before installing the detector element in the
housing and the cap. If you can no longer tighten it
detector element, review the procedures detailed in
detector housing, touch the exposed metal housing
and any space remains, something may be
the
diode replacement section of this Technical
with your hand to discharge stallC electricity. Then
misaligned internally.
lnlormation sheet. The following precautions are
Install the
element into the housing.
prOVided as
supplemental information and are
D. Seat the assembly firmly using a torque wrench
C. Before handing a detector element to another
general In nature.
and the specified torque of 30 inch-pounds (4.4
person.
touch hands first to remove the static
N-M). ensuring that the wrenches are properly
A. During disassembly of the detector assembly,
electricity potential between you.
note the position and alignment of all componeflts.
seated on the flat surfaces provided.
D. Do not use an ohmmeter to measure the If
small components are damaged. replace them
detector element's diode resistance. The
before reassembly.
1499-16709/2-88/500
From the library of WØMTU

10. Remove the old calibration label since its data will
no longer apply. Leave the old part number label on
the detector.
11. Check the detector in accordance with the Detector
Performance Evaluation Procedure shown at the bottom
of the next column.
12. If facilities are available for evaluating frequency
response characteristics, the new calibration data can be
marked on the new label, if supplied,
or recorded for
reference. If a new label is marked, it should be affixed to
the detector insulator to replace the old label. If no
facilities are available to check
frequency response, the
detector can be returned to the factory for calibration.
FOR DETECTOR PIN'S 13785, 13786, 13787, 13838,
13840,
14139, AND 15271 (MODEL 1045) USE THE
FOLLOWING PROCEDURES:
1. Using Figure 3 on page 3 of this sheet as a guide,
remove the
two #2-56 screws from the sides of the
insulator. Slide the insulator back.
2. Unscrew the cap assembly from the detector housing
assembly.
3. Remove the detector element and, if included, the ring
from the detector housing assembly. (Older detectors
may have a capsule spacer and capacitive washer.
Remove these. They will be replaced by the ring included
in the kit. If
your detector has just the ring, replace it with
the ring from the kit.)
4. Late model detectors have only the detector element;
no spacer, washer, or ring. If your detector has no spacer,
washer, or ring, then discard the ring from the kit and
replace
just the element as shown in Figure 3. Make sure
that the
components are correctly seated and pressed
firmly into the detector.
WARNING: Use care when pressing the
detector
element into the housing to avoid damaging the
female socket contacts.
5. Using Figure 4 on page 4 of this sheet as a guide,
unscrew the
coupling nut from the cap. Remove the #2
screw from the thermistor mount so that it is free to revolve
in the cap.
6. Holding the cap securely, use the spanner wrench
(P/N 14238) provided in the kit to unscrew the audio
connector. Make sure that the thermistor mount also
revolves in the cap in the same
direction as the audio
connector.
7. Check the value of the existing resistor against the
val ue of the resistor included in the kit. Ifthey are the same
value, leave in the existing resistor.
8. Ifthe resistor val ues are different, unsolderthe existing
resistor and replace it with the new resistor from the kit.
Solder the resistor across pins 1 and
5. The red wire must
be re-soldered back into
connector pin 1.
9. Screw the audio connector back into the cap, alloWing
the
thermistor mount to revolve in the same direction as
the connector.
10. Using the #2 screw, secure the thermistor mount to
the cap. Then screw the
coupling nut back onto the cap.
11. Replace the coupling nut/cap assembly onto the
detector housing and tighten it to 30
inch-pounds
(4.4 N-M).
12. Replacethe insulator and secure it with the two #2-56
screws.
13. Remove the old calibration label since its data will
no longer apply. Leave the old part number label on
the detector.
14. Check the detector in accordance with the Detector
Performance Evaluation Procedure given below.
15. If facilities are available for evaluating frequency
response characteristics, the new calibration data can be
marked on the new label, if supplied, or recorded for
reference. If a new label is marked, it should be affixed to
the
detector insulator to replace the old label. If no
facilities are available to check frequency response, the
detector can be returned to the factory for calibration.
DETECTOR PERFORMANCE EVALUATION
PROCEDURE
This test will check the detector for proper linearity and
VSWR characteristics.
Standard procedurescan be used to check return
loss. The
measurement of return loss up to a frequency of 34GHz
requires considerable care if measurement errors are to
be avoided. It
is highly recommended that aslotted line be
used, or to use couplers or bridges with open/short
calibration and
an air line during the measurement
procedure.
To check linearity, the power meter or analyzer
compatible with the detectors must be within proper
calibration. To supply power tothe detector, asourcewith
a
power output between 0 and 16dBm must be used. This
is usually a30 to 50MHz sourceof40mW. Thesource must
have harmonics down at least 50dB, and a well matched
step attenuator (10dB steps, return loss greater than
20dB, and a 70dB range). Due to the tightness
of the
linearity specification for the detectors, the coaxial
attenuator must have a correction chart with it allowing
the attenuation to be
known within 0.03dB down to
-40dBm, and within
0.1 dB below -40dBm.
Connect the attenuator between the detector and the
source. Starting with 0 attenuation, step the attenuator
in
10dB steps. If detectors forthe 1038-HIVSystem are being
checked, measurement
accuracy should be 0.1 dB/10dB
plus 0.5dB
at -50dBm. If detectors for the Model 1045 or
Model 1034A are being checked, use the linearity curves
of either Figure 5 or Figure 6 on page 4 of this sheet for
comparison.
2
From the library of WØMTU

INSULATO~
INSULATOR
DETECTOR ELEMENT
DETECTOR
ELEMENT
INSULATOR
~
DETECTOR
HITE CERAMIC
CAPSULE SPACER
POLYIRON INSERT v<on ~ ~ __
~
THIS SIDE ~
CAPACITIVE WASHER ~ ~--
~
" v\
BLACK
DETECTOR HOUSING ASSEMBLY ~
W
~ ELEMENT '"
RING BLACK INSULA TOR
COUPLING NU~
Figure 1. Element Replacement for Detectors Used With the 1038-HIV and 1034A Units
Audio Connector
/
~ Strain relief
Resistor
(Pin 3 to Pin 4)
Figure 2. Resistor Replacement for Detectors Used With the 1034A Units
---~~ETECTOR ELEMENT
~ ~~ INSULATOR
~
~--- DETECTOR ELEMENT
RIN~ BLACK INSULATOR
DETECTOR HOUSING ASSEMBLY
~
HITE CERAMIC INSULATOR CAP ASSEMBL Y· iiil~~~~~~~~
CAPSULE SPACER DETECTOR ELEMENT '- ~
POLYIRON INSERT v,"-,n ~ , - - __ :::iiiiiiiiii@~~~
THIS SIDE ~ ~ \\--'"'\~f'~I~ifiiiiiiii--
CAPACITIVE WASHER ~
Figure 3. Element Replacement for Detectors Used With the Model 1045 Unit
3
From the library of WØMTU

AUDIO CONNECTOR
THERMISTOR MOUNT
~
RED WIRE
PINS
PIN 1
Figure 4. Resistor Replacement for Detectors Used With the Model 1045 Unit
to 2dB @ -60dBm
0.5
~
co 0.4
"0
+1
...
c:
~
.,
c:
E
0.3
;;l ° .~
.... ...
...
Vl .~
'"
-
.,
c:
0
>
"
0.2
-
00
.0
c:
,'"" .......
Vl"O 0.1
Vl
'"
°
c..c:
"
0.0
+10
o -10 -20 -30 -40 -so -60
0° to lsoe j
35°
to
sooe
/j
~
\ / /
~
/
15°
f 3soe
to
Signal Level (dBm)
to 2dB @ -60dBm
Iii:
co
1.0
0.8
'/
"0
+1
... ~
"
"
c:
E °
~ .;;
0.6
0° to lSoe
...
'"
III ...
c:
>
-0
"
"
-o<l .n
c:
'1""'1 .......
III "0
III
'"
° "
c..c:
0.4
0.2
35
0
to
\
o f
15 to
sooe
35°
/
/'
:/"
/"
0.0
1
-I
+10 o
-10 -20 -30 -40 -so -60
Signal Level (dBm)
Figure 5. Model 1045 DetectorMeasurement Figure
6. Model 1034A Detector Measure-
Accuracy from 1 MHz to 26.5GHz.
ment Accuracy from 1 MHz to 10GHz. (Add
0.2dB to the curve for frequencies from
10GHz to 18GHz.)
TEK
M I C ROW A V E, INC 0 R P 0 RAT E 0
488 TASMAN DRIVE, SUNNYVALE, CALIFORNIA 94089 Tal: [phone]
TWX: (9101 339-9273
4
From the library of WØMTU

Model 1034A
1. GENERAL INFORMA nON
1.1 WAVETEK MICROWAVE, INC. (WMI)
MODEL 1034A PORTABLE RF POWER
METER
The WMI Model 1034A Portable Power Meter is
used
with an RF power detector to indicate the
power level incident upon the detector. A panel
meter with a scale length of 4 1/2 inches indi-
cates the power on three scales. The two top
scales cover a decade range of power with a one
decibel overlap. The top scale indicates power
in linear terms, and the scale below it indicates
in decibels. The third (bottom) scale covers a
50dB
range from -40 to +1 OdBm and indicates in
dBm.
One of seven ranges can be selected by
push
buttons arranged in a column on the right
side of the meter's front panel. These will
cause the meter to read on-scale for the decade
ranges as long as the input power is within the
measurement range of the instrument. An addi-
tional button at the top of the column selects
the -40 to +IOdBm range.
A calibration factor control allows the sensitiv-
ity of the instrument to be set to compensate
for variations in detector calibration factors.
The calibration factor for the detector is sup-
plied in the form of a chart showing the calibra-
tion factor at several different frequencies
throughout the operating frequency range of the
detector. By setting the control to correspond
to that given for the detector at or near the
specific frequency of the test signal, the instru-
ment will compensate for this fdctor and read it
as if the calibration factor were unity. 50 to 75
ohm adapters are available as accessories.
These will reduce the effective sensitivity by
1.76dB. To compensate for this, the sensitivity
of the instrument can be increased an equiva-
lent amount by switching the slide switch on the
left of the meter to the 75 ohm position. It is
important to be sure that the switch has been
returned to the 50 ohm position when the adapt-
er is not in use.
There will be a small change in the sensitivity
of the detector with a change in the tempera-
ture. The detector is equipped with a tempera-
ture sensor to allow compensation for this ef-
fect, but there can be some small residual vari-
ation. To allow the operator to adjust for this
and to provide a convenient self-test feature,
there is a calibration signal available from the
front panel connector. This signal is very stable
with respect to changes in temperature, has
very low harmonic output, and is precisely
matched to 50 ohms. The bottom push button
on the right-hand column turns on the calibrator
and selects the range for the instrument to read
full-scale when connected to the calibrator out-
put. A screwdriver adjustment adjacent to this
button sets the instrument for a correct read-
ing. To measure low level signals, it is neces-
sary to check to see that there has been no ap-
preciable zero drift in the instrument. Like all
power meters, the Model 1034A will drift some-
what if the detector temperature is changing.
Ideally, the detector should be connected to the
measurement system with the power turned off,
and the instrument set for an indication in the
center scale "Zero" range. This is done by
pressing the ZERO button and adjusting the
screwdriver control next to the button.
To allow plotting of the power indication on an
X-Y plotter, there is an analog output on the
front panel. The output is 1.1 V for d full-scale
deflection of the meter. Since there is an 11 dB
range on the meter scale, this represents 0.1 V
for
each dB on the single-range scale. For the
-40 to +10dBm scale, the corresponding factor
is 0.0167VIdB, or 60dB per volt. The recorder
input must be isolated from ground.
The 1034A will operate steadily from its bat-
tery, without line power, for more than 10
hours. To recharge the battery, the instrument
is plugged into the line power source with its
power switch off (the pilot light will not be lit)
for 14 to 20 hours. The unit can be left con-
nected to the line at all times with no danger of
damage to the battery. Recharging will take
place if the instrument is turned on during the
charging cycle, but the recharging time will in-
crease to approximately 40 hours. If the power
is supplied during normal use, the battery will
remain charged and battery power will be avail-
able when needed.
1-1
From the library of WØMTU

Model 1034A
1.2 PERFORMANCE SPECIFICA nONS
DRIFT WITH TEMPERATURE CHANGE
POWER RANGE
At -50dBm, less than 0.5dB/oC. Propor-
tionately less as the input signal increas-
Seven 11 dB ranges with full-scale readings
es.
of 10mW, ImW, 100uW, 10uW, luW, 100-
nW, lOnW, and an eighth range covering
CALIBRATION OUTPUT
-40 to +lOdBm.
ACCURACY (See Figure 1-1, below)
to 2dB @ -60dBm
1.0
e-
'"
..
0.8
."
... ~
I:
I!
" "
0
0.6
t .;:;
...
......
"'
-
..
I:
Cl
>
'"
0.4
00
..0 "
--
0.2
..
..
."
..
0
..
<>. '"
0.0
.10 0 -10 -20 -30 -40 -50 -60
u
0° to 15°C
35° to 50°C
I \ I / /'
V
/
I f I
15° to 35°
Signal Level (dBmJ
Calibrator output is 10mW (+lOdBm) with
an uncertainty of 1.5%. Nominal frequen-
cy is 30MHz. Output impedance is 50
ohms. Source VSWR better than 1.04.
Drift is less than 0.04dB over a three
month period. Temperature coefficient is
better than 0.001dB7°c.
ANALOG OUTPUT
1.1V for
full-scale reading with a coeffi-
cient of 100mV/dB. Output impedance is
approximately 10K ohms. Noise
than O.ldB p-p at -20dBm.
is less
METER
Taut band 1mA movement with mirror-
backed scale. Milliwatt scale length is 4
1/2 inches.
Figure 1-1. Model 1034A Detector Measure-
ment Accuracy from 1MHz to 10GHz. (Add POWER
REQUIREMENT
0.2dB
to the above for frequencies from 10GHz
to 18GHz. The curve includes uncertainty due
115/230Vac tlO%, 50 - 400Hz, 10VA
to detector non-linearity, but not mismatch or
efficiency calibration errors. Not applicable to
OPERATING TEMPERATURE RANGE
-40 to +lOdBm range.)
ZERO CARRYOVER
Included in the accuracy specifications.
NOISE
WEIGHT
3.4 kg (7.5 lbs)
(without battery)
3.86 kg (8.5 lbs) (with battery)
Less than 0.05dB p-p for signal levels
greater than -40dBm. Less than 0.2dB p-p
for signal levels greater than -50dB, as
observed on the meter.
OVERALL DIMENSIONS
191 x 152 x 229
mm
(7 1/2 x 6 x 9 in)
(H x W x D)
ZERO DRIFT
BA TTER Y POWER S UPPL Y (Option 01)
At -50dBm, less than IdB/hour. Propor-
tionately less as the input signal increases
(constant 250 C temperature, after 1/2
hour stabilization).
Battery provides more than 10 hours of
continuous operation. Full charge is
obtained after 16 hours of charging ti me.
Input line voltage range is 90 to 130 and
180 to 260Vac, 50 to 400 Hz. (This option
obviates Option 04.)
1-2
From the library of WØMTU

Model 1034A
OPTION 03
APe? connector on the Calibrator output.
OPTION 04
Operation from 100/200Vac ±10% line.
No extra charge. (See also Option 01
description, preceding.)
1-3
From the library of WØMTU

Model 103lj.A
2. INITIAL INSTRUCTIONS 2.4 CHASSIS GROUNDING
2.1 RECEIVING INSTRUCTIONS
Inspect the instrument for any shipping dam-
age. Be sure that all portions of the shipment
are located and removed before discarding the
shipping container.
2.2 RETURNING THE INSTRUMENT
If it is felt the instrument should be returned to
WMI for any reason, it is recommended that the
Wavetek Microwave Customer Service Depart-
ment be contacted prior to sending back the
unit. It is often the case that many problems
can be resolved by telephone or Telex without
the necessity of returning the instrument. The
telephone number is (lj.08) 73lj.-5780, extension
260, or Telex 3716lj.60.
2.3 POWER REQUIREMENTS
Before applying power to the instrument from
the line, be sure that the instrument is set for
the correct line voltage. When the instrument
leaves the factory, a plate is installed just
above the power input connector showing the
correct line voltage. If it is required to change
the line voltage, the large screws at the left
and right center of the front panel and the
screws on the bottom of the case should be re-
moved. Lift the instrument out of its case to
allow access to the line voltage switch. Move
the switch to expose the correct line voltage in-
dicator on the moveable plastic part of the
switch. If the 115Y indicator is exposed, stan-
dard units will operate from 115Y ac ±IO%. If
the 230Y indicator is exposed, the unit is set to
operate from 230Y ±10%. If equipped with op-
tion Olj., the unit will operate from 100Y ±10% if
set to 115Y, or 200Y if set to 230Y. If equipped
with option 01 (battery) the 115Y setting will
cover the range from 180Y to 256Y. If the
switch setting is changed, be sure to remove the
plate above the power input connector and rein-
stall it so that the correct voltage is facing up
(the plate is marked on both sides).
WARNING: Failure to properly ground
the instrument can allow dangerous volt-
age levels to build up on the chassis which
could
be dangerous to operating personnel.
The 103lj.A is supplied with a three conductor
power cord. The instrument will be properly
grounded if the plug is connected to a proper ly
grounded three-prong receptacle. If a three
prong to two prong adapter is used, be sure that
the extra lead from the adapter is grounded.
If the unit is equipped with option 01 (battery),
it can be operated independently of the power
line. The internal supplies are low voltage and
no danger is present in the 103lj.A itself when in
the battery mode. However, without the power
cord connected, the unit will not be grounded
and the chassis will assume the potential of the
device to which it is connected. Many types of
microwave sources operate with potentially le-
thal internal voltages. For this reason, it is ex-
tremely important for the operator to be sure
that the device to which the 103lj.A is connected
is safely grounded.
2.5 DETECTOR HANDLING
Caution: Before handling the detector in-
cluded with the 103lj.A, read the "Handling
Precautions" at the bottom of the "Detec-
tor Element and Tracking Resistor" Tech-
nical Information sheet located at the end
of Section I (preceding).
All detectors will be damaged if too much RF
power is applied to them, so be sure to observe
the warning affixed to the detector housing.
The coaxial detector used with the 103lj.A has a
maximum rating of 200mW (+23dBm). It should
be determined prior to testing that the power
output of the device under test will not exceed
tha t specifiea tion.
2-1
From the library of WØMTU

Model 1034A
2.6 ACCESSORIES
The following accessories are supplied with the
1034A:
ea PIN 12356 Power Cord
ea piN 14166 Operating & Maintenance
Manual
There is a storage compartment in the top of
the case. Normally, the instrument will be
ordered with the RF detector and possibly a 50
to 75 oh m adapter. These items and the power
cord should be found in this compartment.
2-2
From the library of WØMTU

Model 1034A
(This
page intentionally left blank)
3-1
From the library of WØMTU

Model l034A
(This page intentionally left blank)
3-2
From the library of WØMTU

Model l03lfA
Figure 3-1. Model l03lfA Front Panel
3-3
From the library of WØMTU

Model 1034A
3.
OPERATION
3.1 FRONT PANEL CONTROLS
The following controls are located on the front
panel of the 1034A. For reference, a photo-
graph of the front panel is shown on the attach-
ed page in Figure 3-1.
3.1.1 Power Switch
This push-push switch is arranged so that power
will be ON when the switch is out. When the
cover is placed on the instrument case a plastic
rod forces the switch in, ensuring that the pow-
er is off and the battery is not being drained.
The fastest way to recharge the battery is with
the unit connected to the ac line with the power
switch off. A pilot light adjacent to the switch
indicates if the instrument is turned on, but will
not light during charging only.
3.1.2
Meter Range Push Buttons
Eight of the ten buttons on the right side of the
meter control the ranges that can be selected
for the meter. The top button (A-E) selects the
bottom dBm scale of the meter, covering the
range from -40 to +I OdBm. This range is useful
if the power being measured will be varying
over a wide range; for example, when adjusting
a filter or an antenna at the start of the adjust-
ment procedure. It is also useful to determine
the approximate power delivered by a source to
the meter so that the proper range limit button
can be selected. Between the major divisions of
this scale are the letters A through E, indica-
ting the appropriate expanded range for the
power being measured. Below -40dBm there is
no
accurate indication of power so that a selec-
tion of the bottom two expanded ranges must be
made by trial. The seven expanded range scales
are selected by the buttons below the top one
(A-E). The values for the full-scale readings on
the two uppermost scales of the meter are in-
dicated to the right of each of the buttons. The
top indication of the two is for the top scale of
the meter (linear values), and the bottom indic-
ation refers to the next scale down (dB). The
expanded scales provide the best resolution and
the accuracy specified for the instrument. If a
reading greater than +lOdBm is indicated, the
power to the detector should be reduced with-
out delay because the +23dBm (200m W) destruc-
tion point of the detector diode could be gener-
ated by the power source.
3.1.3 Zero Button &: Screwdriver Adjustment
Pressing the ZERO button causes the meter to
indicate the correct zero signal balance adjust-
ment for the input circuits of the instrument.
With no RF power applied to the detector and
the ZERO button depressed, the screwdriver ad-
justment adjacent to the ZERO button is set to
cause the meter to read in the small range
marked "Zero" in the center of the meter's
scale.
3.1.4 Cal Button &: Screwdriver Adjustment
Pressing the CAL button turns the calibration
oscillator on, disconnects the CAL FACTOR
control, selects the DIRECT 50li position, and
puts the meter on the "A" scale. When the de-
tector is then connected to the CAL OUTPUT
connector, the CAL screwdriver adjustment can
be set to cause the instrument to indicate ex-
actly 10mW, or full scale.
3.1.5 Calibration Factor Control (dB)
This
control adjusts the sensitivity of the in-
strument to compensate for variations in detec-
tor sensitivity with changes in frequency. A
calibration chart is provided with the detector
that gives the correct setting of the CALIBRA-
TION FACTOR control for a number of discrete
frequencies within the operating range of the
detector. The control should be set to corres-
pond to the point on the detector's calibration
chart closest to the operating frequency. If the
detector is being used in conjunction with a di-
rectional coupler or attenuator of known cali-
bration, the control can be set to compensate
for both the detector and the additional de-
vice. The meter will then read directly ..
3.1.6 Direct 50 li /75 li Adapter Switch
Normally, this switch will be left in the 50 li -
positiona
If a 50 to 75li adapter is connected in
front of the detector, the switch can be set to
75li to correct the reading for a 1.76dB adapter
loss.
3-4
From the library of WØMTU