HP 11793A Service manual

$JLOHQW7HFKQRORJLHV,QF
(0LVVLRQ
/LEHUW\/DNH:$
ZZZDJLOHQWFRP
-XQH
Dear Customer,
As of November 1, 1999, four of Hewlett-Packard’s businesses, test and measurement,
semiconductor products, health care solutions, and chemical analysis became a new company,
Agilent Technologies. Now, many of your Hewlett-Packard products and services are in the care of
Agilent Technologies.
At Agilent Technologies, we are working diligently to make this transition as smooth as possible for
you. However, as a result of this transition, the products and related documentation contained in this
shipment may be labeled with either the Hewlett-Packard name and logo, the Agilent Technologies
name and logo, or a combination of both. Information in this package may refer to Hewlett-Packard
(HP), but applies to your Agilent Technologies product. Hewlett-Packard and Agilent branded
products with the same model number are interchangeable.
Whatever logo you see, the information, products, and services come from the same reliable source.
If you have questions about Agilent Technologies products and services, please visit our website at
http://www.agilent.com.
6LQFHUHO\
5HEUDQGLQJ7HDP

OPERATING AND SERVICE MANUAL
HP 11793A
M I C R 0 WAVE
CONVERTER
September 1990
11793-90011
111111111111111111111111111111111111111111111111111111111111ll111
HEWLETT
PACKARD

CERTlFlCATlON
Hewlett-Packard Company certifies that this product met its published specifications ut the time of shipment
fromthefactory.Hewlett-Packard furthercertifies that its calibration measurements are traceable to the United
States National Bureau of Standards, to the extent allowed by the Bureau’s calibration facility, and to the
calibration facilities of other International Standards Organization members.
WARRANTY
This Hewlett-Packard instrument product is warranted against defects in material and workmanship for a period
of one year from date
of shipment. During the warranty period, Hewlett-Packard Company will at its option,
either repair or replace products which prove to be defective.
For warranty service or repair, this product must be returned to a service facility designated by HP. Buyer shall
prepay shippingcharges to HPand
HP shall pay shipping charges to return the product to Buyer. However,Buyer
shall pay all shipping charges, duties, and taxes for products returned
to HPfrom another country.
HP warrants that its software and firmware designated by HP for use with an instrument will execute its
programming instructions when properly installed on that instrument. HP does not warrant that the operation
of the instrument, or software, or firmwarewill be uninterrupted or error free.
LIMITATION OF WARRANTY
The foregoingwarranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer,
Buyer-suppliedsoftwareorinterfacing,unauthorizedmodificationor misuse,operationoutside
of theenvironmental
specifications for the product, or improper site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSEDOR IMPLIED. HPSPECIFICALLY DISCLAIMSTHEIMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREINARE BUYERS SOLE AND EXCLUSIVE REMEDIES. HP SHALL
NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
Product maintenance agreements and other customer assistance agreements are available for Hewlett-Packard
products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Office. Addresses are provided at
the back of
this manual.

Agilent Technologies. Inc
24001 E Mission
Liberty take, WA
99019
www agilent corn
e.
, .'::is:. . Ag i I en t Techno Io g i es
: - : . Innovating the HP Way
.*a*..
June 8,2000
Dear Customer,
As of November 1, 1999, four of Hewlett-Packard'sbusinesses, test and measurement,
semiconductor products, health care solutions, and chemical analysis became a new company,
Agilent Technologies. Now, many of your Hewlett-Packardproducts and services are in the care of
Agilent Technologies.
At Agilent Technologies, we are working diligently to make this transition as smooth as possiblefor
you. However, as a result of this transition, the products and related documentation contained in this
shipment may be labeled with either the Hewlett-Packardname and logo, the Agilent Technologies
name and logo, or a combination of both. Informationin this package may refer to Hewlett-Packard
(HP), but applies to your Agilent Technologies product. Hewlett-Packard and Agilent branded
products with the same model number are interchangeable.
Whatever logo you see, the information, products, and services come from the same reliable source.
If you have questions about Agilent Technologies products and services, please visit our website at
httR://www.aqilent.com.
Sincerely,
Rebranding Team

HP 11793A
MICROWAVE
CONVERTER
SERIAL NUMBERS
Operating and Service Manual Part No. 11793-90011
Microfiche Operating and Service Manual Part
No. 11793-90012 Printed.
MAY 1985
This manual appliesdirectly to instrumentswith serial
numbers prefixed 2520A.
With changes described in Paragraph 31, this manal
also applies
to instruments with serial numbers pre-
fixed
2407A.
For additional important information about serial
numbers, see INSTRUMENTS
COVERED BY THIS
MANUAL in Paragraph
4.
First Edition
OHEWLElT-PACKARD COMPANY 1985
EAST 24001 MISSION AVENUE, TAF C-34, SPOKANE, WASHINGTON, U.S.A., 99220

1 Regulatory Information
(Updated March 1999)
1

Regulatory Information (Updated March 1999)
Safety Considerations
GENERAL
This product andrelated documentation must be reviewed for familiarization with safety
markings and instructions before operation.
This product has been designed and tested in accordance with IEC Publication 1010,
"Safety Requirements for Electronic Measuring Apparatus," and has been supplied in a
safe condition. This instruction documentation contains information and warnings which
must be followed by the
user to ensuresafe operation and to maintain the product in a safe
condition.
SAFETYEARTH GROUND
A uninterruptible safety earth ground mustbe provided from the main power source to the
product input wiring terminals, power cord, or supplied power cord set.
SAFETY
SYMBOLS
A Indicates instrument damage can occur if indicated operating limits are exceeded.
A Indicates hazardous voltages.
1- Indicates earth (ground)terminal
WARNING
A WARNING note denotesa hazard. It calls attentionto a procedure,
practice, or thelike, which,
if not correctlyperformedor adheredto,
couldresultin personal injury.
Do not proceedbeyond a WARNING
sign untilthe indicated conditionsare fully understoodandmet.
CAUTION A CAUTION note denotes a hazard. It calls attention to anoperation
procedure, practice, or the like, which, if not correctly performed or adhered
to, could result in damage to or destruction of part or
all of the product. Do
not proceed beyond an CAUTION note until theindicated conditions arefully
understood and met.
2 Chapter 1

Regulatory Information(Updated March 1999)
Safety Considerationsfor this Instrument
WARNING
This product is a SafetyClass I instrument (providedwith a
protective earthingground incorporated inthe power cord).The
mains plug shall only be inserted
in a socket outlet provided with a
protective earthcontact.Any interruptionof the protective
conductorinside or outside
of the product islikelytomake the
product dangerous. Intentional interruptionis prohibited.
Whenever it is likely that the protection has been impaired, the
instrument must be made inoperative andbe secured against any
unintended operation.
If this instrument is tobe energizedvia an auto transformer (for
voltagereduction),make surethe commonterminal
is connected to
the earth terminal of the power source.
If thisproduct is not used asspecified,theprotection provided by
the equipment couldbe impaired. This product must be used in
a
normal condition (inwhich all means for protection areintact) only.
No operator serviceableparts inthis product. Refer servicingto
qualifiedpersonnel. To prevent electrical shock,do not remove
covers.
Servicinginstructions are for useby qualified personnel only. To
avoid electricalshock,do not perform any servicingunless you are
qualifiedto do
so.
The openingof covers or removal of partsis likely to expose
dangerousvoltages. Disconnect the product
from all voltage sources
while it
is being opened.
The power cord is connectedto internalcapacitors that my remain
live for
5 secondsafter disconnecting the plug from its power supply.
For Continuedprotection againstfirehazard,replace thelinefuse(s)
only with
250 V fuse(s) or the same currentrating andtype (for
example,normal blow or time delay). Do not use repaired fuses or
short circuited fuseholders.
Always usethethree-prongacpower cord suppliedwith this
product. Failureto ensure adequate earth groundingby not using
this cord may cause product damage.
This product is designed for use inInstallation Category I1 and
PollutionDegree
2 per IEC 1010 and IEC 664 respectively. FOR
INDOOR USE ONLY.
This product has autorangingline voltage input,be surethe supply
voltage
is within the specified range.
3

Regulatory information (Updated March 1999)
To prevent electrical shock,disconnectinstrument from mains (line)
before cleaning.
Use a drycloth or one slightlydampened with water
to cleanthe external caseparts.
Do not attempt to clean internally.
VentilationRequirements: When installingthe product in a cabinet,
the convection intoand out
of the product must not be restricted.
The ambienttemperature (outsidethe cabinet)must be less than the
maximum operatingtemperature
of theproductby 4" C for every 100
watts dissipated in the cabinet. If the total power dissipatedin the
cabinet
is greater than 800 watts, then forced convection must be
used.
Product Markings
CE - the CE mark is a registered trademark of the European Community. A CE mark
accompanied by
a year indicated the year the design was proven.
CSA - the CSA mark is a registered trademark of the Canadian StandardsAssociation.
4 Chapter 1

Model Safety Considerations
SAFETY CONSIDERATIONS
GENERAL
This product and related documentation must be
reviewed before operation for familiarization with
safety markings
and instructions.
This product is a Safety Class I instrument (pro-
vided with
a protective earth terminal).
BEFORE APPLYING POWER
Verifythat the product is set to match the available
line voltage and the correct fuse is installed.
SAFETY EARTH GROUND
An uninterruptible safety earth ground must be
provided from the main power source
to the prod-
uct input wiring terminals, power cord, or supplied
power cord set.
SAFETY SYMBOLS
Instruction manual symbol: the product
A will be marked with this symbol when it is
necessary for the user to refer to the instruction
manual (refer to Table of Contents).
Indicates hazardous voltages.
1, Indicates earth (ground) terminal.
f
-
The WARNING sign denotes a
hazard. It calls attention to a
procedure, practice, or the like, which, if not cor-
rectly performed
or adhered to, could result in per-
sonal injury.
Do not proceed beyond a WARNING
sign until the indicated conditions are
fully under-
stood and met.
The CAUTION sign denotes a
hazard. It calls attention to an
operating procedure, practice, or the like, which, if
not correctly performed or adhered to, could result
in damage to or destruction of part or all of the
product.
Do not proceed beyond a CAUTION sign
until the indicated conditions are fully understood
and met.
I WARNING 1
Interrupting the protective (grounding) conductor
(inside
or outside the instrument) or disconnecting
theprotective earth terminal will cause apotential
shock hazard that could result in personal injury.
(Groundingone conductor ofa two conductor outlet
is not sufficientprotection).
Whenever it is likely that the protection has been
impaired,
the instrument must be made inopera-
tive and be secured against any unintended
operation.
If this instrument is to be energized via an auto-
transformer (for voltage reduction), make sure the
common terminal
is connected to the earth termi-
nal of
the power source.
Servicing instructions are for use by
service-trained personnel only.
To avoid dangerous
electric shock, do not perform any servicing unless
qualified to do
so.
Adjustments described in the manual are per-
formed with power supplied to the instrument
while protective covers are removed. Energy avail-
able at manypoints may,
if contacted, result in per-
sonal
injury.
Capacitors inside the instrument may still be
charged even
if the instrument has been discon-
nected from its source of supply.
For continued protection against fire hazard, re-
place
the line fuse(s)only with 250V fuse(s) of the
same current rating and type (for example, normal
blow, time delay, etc.).
Do not use repaired fuses
or short-circuited fuseholders.
..
11

Microwave Converter Model 11793A
MODEL 11793A
IF INPUT CABLE
(HP Part Number 11793-60006)
FREQUENCY CONTROL CABLE
(HP Part Number 8120-1838)
--
LO INPUT CABLE
(HP Part Number 11793-60009)
LINE POWER CABLE
Figure 1. HP Model II793A Microwave Converter with Accessory Cables
0

Model 1 1793A Microwave Converter
LO Amplitude Range
+8 dBm to +13 dBm
$7 dBm to +13 dBm
0 dBm to +5 dBm
1. GENERAL INFORMATION
Frequency (GHz) Conditions
2 to 18
18
to 26.5
18
to 26.5
Without Option 001, 011 or 021
Without Option 001, 011 or 021
With Option 001, 011 or 021
This Operating and Service Manual contains information about initial inspection, operation, performance
tests, adjustments,troubleshooting and repair of the
HP Model 1 1793A Microwave Converter.
2, Specifications
The HP 1 1793A Microwave Converter does not have "hard specifications" against which the instrument
can be tested for performance standards or limits. Instead, the Local Oscillator
(LO) Requirements are
listed in Table
1. These requirements are the performance standards or limits against which the
instrument can be tested. The supplemental characteristics listed in Table
2 are not warranted
requirements but are typical characteristics included as additional information for the user.
Table 2. Supplemental Characteristics
RF Input Connector: Precision 3.5 mm male
LO Input Connector: Precision 3.5 mm male
IF Output Connector: Type-N female
Rear Panel Control Connector: BNC female
Dimensions:
Height: 88 mm (3.5 in.)
Width: 425 mm (16.7 in.)
Depth: 528 mm (20.8 in.)
HP System II Module Size:
Height:
88 mm (3.5 in.)
Width: 1 Modular Width
Depth: 508 mm (20 in.)
1

Microwave Converter Model 11793A
3. Safety Considerations
This product is a Safety Class I instrument; that is, one provided with a prctective earth terminal. The
Microwave Converter and all related documentation must be reviewed before operation for complete
familiarization with safety markings and instructions. Refer to the Safety Considerations page found at
the beginning of this manual for a summary of the safety information. Safety information pertinent to
the task at hand (that is, installation, operation, performance testing, or service) is found throughout this
manual.
4.
Instruments Covered by This Manual
This instrument has a two-part serial number. The first four digits and the letter comprise the serial
number prefix. The prefix
is the same for all identical instruments;it changes only when a change is made
to the instrument. The last five digits form a sequential suffix which is unique to each instrument. The
contents of this manual apply directly to instruments having the serial prefix listed under Serial Numbers
on the title page.
An instrument manufactured after the printing of this manual may have a serial prefix that is not listed
on the title page. This unlisted serial prefix indicates that the manual for this instrument is supplied with
a Manual Changes supplement that documents the differences.
In addition to change information, the supplement may contain information for correcting errors in the
manual. To keep this manual as current and accurate as possible, Hewlett-Packard recommends that you
periodically request the latest Manual Changes supplement. The supplement is identified with the manual
print date and part number that appear on the title page. Complimentary copies of the supplement are
available on request from your nearest Hewlett-Packard office.
For information concerning a serial prefix not listed on the title page or in the Manual Changes
supplement, contact your nearest Hewlett-Packard office.
5. Description
The HP Model 11793A Microwave Converter down-converts microwave input signals in the range from
1.3 to 26.5 GHz. For frequencies below 1.3 GHz, signals are routed directly to the input of the measuring
instrument. Instruments suitable for lower frequency measuring are the HP
890 1B Modulation Analyzer
or the HP 8902A Measuring Receiver.
For input signals above 1.3 GHz, the Microwave Converter routes the signal through an internal mixer
which mixes the input signal with an external local oscillator. The difference frequency (that is, the
intermediate frequency or
IF) is filtered, amplified, and then appears at the IF OUTPUT connector. The IF
should be between 10and 700 MHz.
The Microwave Converter requires a +8 dBm leveled output from the LO. For LOs with insufficient
power above 18 GHz, an optional internal amplifier
(1 8 GHz to 26.5 GHz) is available. The measuring
instrument controls switching of the RF path and of the
LO amplifier via a rear-panel connection on the
Microwave Converter.
2

Model 11793A Microwave Converter
1 I
Not installed Standard Option 010 Option 020
installed Option 001 Option 011 Option 021
6. Options and Accessories
Electrical Options
The options are summarized in Table 3. The following list describes each option:
Option 001.
Option 010.
Adds an 18to 26.5 GHz LO amplifier to the standard instrument.
Moves the LO INPUT to the right side of the front panel.
Option 011. Moves the LO INPUT to the right side of the front panel and adds the 18 to 26.5 GHz
LO amplifier.
Option 020. Moves all front-panel connectors to the rear panel.
Option 021.
Moves all front-panel connectors to the rear panel and adds the 18 to 26.5 GHz LO
amplifier.
Table 3. HP 11 793A Option Guide
Front-Panel Placement Rear Panel
of LO Input Placement for
I Len Side Right Side All Connectors
LO
Amplifier
Mechanical Options
Instruments with Serial Prefix 2407A have System 11 cabinet parts and hardware that are English thread.
Instruments with Serial Prefix 2520A and higher have System
I1 cabinet parts and hardware that are
METRIC thread.
When ordering Option 907, 908, or 909 for instruments with serial number prefix 2407A (English
thread), use the HP part number in parenthesis.
Option 907 (Front-Handle Kit). Ease of handling is increased with front-panel handles. To retrofit a
standard instrument, order
HP part number 5061-9688 (5061-0088).
Option 908 (Rack-Flange Kit). All necessary hardware and installation instructions are included to
enable mounting
of the Microwave Converter in a rack with 482 mm (standard 19 in.) spacing. To retrofit
a standard instrument, order HP part number 5061-9674 (5061-0074) which has standard 4.45 cm (1.75
in.) hole spacing.
Option 909 (Rack-Flange and Front-Handle Combination Kit). This kit is not simply a front-handle kit
and rack-flange kit packaged together. The combination is made up of unique parts which include both
functions.
To retrofit a standard instrument, order HP part number SO6 1-9675 (SO6 1-0075) which has
4.45 cm (1.75 in.) hole spacing and is a standard flange.

Microwave Converter Model 11793A
Option 907
Front Handle Kit Option 908 Option 909
Rack Flange Kit
Rack Flange and Front
Handle Combination Kit
Figure 2. Rack Mounting Options
Accessories Supplied
The accessories supplied with the Microwave Converter are shown in Figure 1.
a.
b.
C.
d.
e.
The line power cable may be supplied in several plug configurations, depending on the destination of
the original shipment. Refer to the Paragraph 12
"Power Cables" in this manual.
Fuses with a 0.7SA rating for both 11 5 and 230 Vac (HP part number 21 10-0063) are supplied.
The control cable ( HP part number 8120- 1838) is a 30 cm (1 2 in.) flexible cable with male BNC 50
ohm connectors on each end. It connects to the frequency offset mode output of the measuring
instrument.
The LO cable (HP part number 11793-60009) is a 36 cm (14.5 in.) flexible cable with 3.5 mm
female end connectors. The
LO cable includes a 3.5 mm male to Type-N male adapter. The cable
connects to tlie output
of the LO source. Options 001, 01 1,and 021 delete the adapter.
The IF cable (HP part number 11793-60006) is a 25 cm (10 in.) flexible cable with Type-N male 50
ohm end connectors. The cable connects to the RF input of the measuring instrument.
4

Model 11793A Microwave Converter
Instrument Type
Measuring Instrument
Sensor Module
7. Recommended Test Equipment
Minimum Specification Suggested Model
Contains specific circuitry to control the HP 11793A.
Must have a frequency range of 26.5 GHz and be compatible
with the measuring instrument.
HP 8901B or HP 8902A'
HP 11792A'
Table 4 lists the test equipment recommended to check, adjust, and troubleshoot the Microwave
Converter. The Minimum Specifications column describes the essential requirements for each piece of test
equipment. If substitute equipment is used, it must meet or exceed the minimum specifications.
Microwave LO Source
Microwave Signal
Source
Table 4. Recommended Test Equipment
See LO Amplitude Range in Table 1, LO Requirements. Note
that the required output power depends on the LO amplifier
option in the HP
11 793A.
Frequency Range: 2 to 26.5GHz
Output Level:
-1 to +1 dBm
HP 86738"
HP 86738
I To Troubleshoot the Microwave Converter I
[ Instrument Type I Minimum Specification I
Multimeter DC Volts Range: 1OOV
DC Volts Accuracy: 2%
AC Volts Range: lOOV
AC Volts Accuracy: 10% at 50 Hz
RF Test Equipment Troubleshooting of the microwave components of the Microwave Converter requires
measurements to 26.5GHz of gain or insertion
loss, SWR, power, conversion loss, and
frequency. Instruments which are required to perform these tasks include: signal genera-
tors and sweepers, network analyzers, spectrum analyzers, and power meters with ac-
companying couplers, pads, line stretchers, etc. Select the appropriate equipment and
use standard test procedures to make these measurements.
8. INSTALLATION
9. Initial inspection
Inspect the shipping container for damage. If the shipping container or cushioning material is damaged,
the shipping materials should be kept until the contents
of the shipment have been checked for
completeness and the instrument has been checked mechanically and electrically. If there
is mechanical
damage or if the instrument does not pass the performance tests, notify the nearest Hewlett-Packard
office. Keep the damaged shipping materials
(if any) for inspection by the carrier and a Hewlett-Packard
representative.
5

Microwave Converter Model 1 1793A
10. Power Requirements
The Microwave Converter requires a power source of 115, 230 Vac (+lo%,-20%), 48 to 66 Hz. Power
consumption is
20 VA maximum.
11. Line Voltage Selection
Before the instrument is plugged in, it must De set to the voltage of
the power source, or damage tothe instrument may result.
A line voltage switch enables selection of either 11SV or 230V. The line voltage is indicated on this
rear-panel switch.Slide the switch to the proper line voltage for operation.
12. Power Cables
BEFORE CONNECTING THIS INSTRUMENT, the protective earth
terminal of the instrument must be connected to
the protective
conductor
of the (Mains) power cord. The Mains plug shall only be
inserted in a socket outlet provided with a protective earth contact.
The protective action must not be negated
by the use of an extension
cord (power cable) without
a protective conductor (grounding).
Grounding one conductor of a two-conductor outlet is not sufficient
protection.
This instrument is provided with a three-wire power cable. When connected to an appropriate ac power
receptacle, this cable grounds the instrument cabinet. The type of power-cable plug shipped with the
instrument depends on the country of destination. See Table
5 for part numbers of the available power
cables and Mains plugs.
13. Mating Connectors
All coaxial connectors (except the RF Input) used with the Microwave Converter are provided on the
three accessory cables supplied with the instrument listed under Paragraph 6,
I' Accessories Supplied 'I. The
RF Input connector should be of the APC
3.5 mm female SO ohm type. Refer to Table 2, Supplemental
Characteristics
for the correct type and location for mating each connector.
Use the correct torque wrench when installing sub-miniature
connectors.
Tighten 3.5 mm connectors to 0.7 N.m (6.3 in.Eb). Tighten Type-N
connectors to
0.7 Nm (6.3 in.lb).
6

Model 1 179 3A
I
8120-1351
8120-1703
Microwave Converter
0
4
Table 2-2. AC Power Cables Available
8120-1378
8120-1398
8120-1754
8120-1378
8120-1521
8120-1676
8120-2104
8120-0698
8120-1957
8120-2956
8120-4211
8120-1860
z!q Number
5
5
7
1
6
2
3
6
2
3
7
6
Cable
Color
For Use
In Country
Cable
Length
(inches)
90
90
Plug
Description
I 250V
Straight'BS1363A
90" Mint Gray Mint Gray United Kingdom, Cyprus, Nigeria,
Rhodesia,
Singapore
I:".J 00
I 250V Gray
Gray Austrailia,
New Zealand
79
87
79
79 Mint Gray
Mint Gray East and West Europe, Saudi
Arabia, Egypt,
(unpolarized in
many nations)
Straight'CEE7-Y11
goo
8120-1692
I 125V
United States,
Canada, Mexico,
Japan (1OOV or
200V), Philippines,
Taiwan
Straight'NEMA5-15P
90"
Straight'NEMA5-15P
Straight'NEMA5-l5P
90"
Straight'NEMA5-15P
Straight'SEVl 01 1
Type 12
1959-24507
80
80
36
80
80
36
79
Black
Black
Black
Jade Gray
Jade Gray
Jade Gray
Gray
I 250 V
Switzerland
~~
United States,
Canada
Straight'NEMAG-15P
79
79 Gray Gray Denmark
Straight'DHCK107
90"
I 250V
Straight'lEC83-B1 79 Black South Africa, India
Straight'CEE22-VI
(Systems Cabinet Use)
'Part number shown for plug is industry identifierfor plug only. Number shown for cable is HP Part Number for complete
cable including plug.
E
= Earth Ground; L = Line; N = Neutral
7

Microwave Converter Model 11793A
14. Operating Environment
The operating environment should be within the following limitations:
Temperature .......................... 0°C to +55"C
Humidity
.............................. ~95%relative at 40°C
Altitude
............................... 44570 meters (1 5 000 feet)
15. Bench Operation
The instrument cabinet has plastic feet which are shaped to insure self-alignment when stacked in a
system configuration.
16. Rack Mounting
Rack mounting information is provided with the rack mounting kits. If the kits were not ordered with the
instrument as options, they may be ordered through the nearest Hewlett-Packard office. Refer to
Paragraph
6, under "MechanicalOptions"for kit information. See Figure 2, Rack Mounting Options.
17. Storage and Shipment
The instrument should be stored in a clean, dry environment. The following environmental limitations
apply to both storage and shipment.
Temperature (Standard) ....................... - 5 5°C to +7 S"C
Temperature (Options 001, 01 1,and 021) .... -25°C to +7S"C
Humidity ......................................
49 5% relative
Altitude .......................................
15 300 meters (SO 000 feet)
18. Packaging
Original Packaging. Containers and materials identical to those used in factory packaging are available
through Hewlett-Packard offices. If the instrument
is being returned to Hewlett-Packard for servicing;
attach a tag indicating the type of service required, return address, model number, and full serial number.
Also, mark the container
FRAGILE to ensure careful handling. In any correspondence refer to the
instrument by model number and full serial number.
Other Packaging. The following general instructions should be used for repackaging the instrument with
commercially available materials.
a. Wrap the instrument in heavy paper or plastic. (If shipping to a Hewlett-Packard office or
service center, attach a tag indicating the type of service required, return address, model number,
and full serial number.)
b. Use a strong shipping container.
A double-wall carton made of 2.4 MPa (350 psi) test material is
adequate.
8

Model 11 793A Microwave Converter
c. Use enough shock-absorbing material; a
7.5 to 10.0 cm (3 to 4 in.) layer around all sides of the
instrument to provide a firm cushion and to prevent movement in the container. Protect the
front panel with cardboard.
d. Seal the shipping container securely.
e. Mark the shipping container FRAGILE to ensure careful handling.
19. Operation
Before the Microwave Converter is plugged in, all protective earth
terminals, extension cords, auto-transformers, and devices connected
to it should be connected to a protective earth grounding socket. Any
interruption
of the protective earth grounding will cause a potential
shock hazard that could result in personal injury.
Before the Microwave Converter is plugged in, it must be set to the
same line voltage as the power source
or damage to the instrument
may result.
The HP 11 793A Microwave Converter is designed to be operated remotely by the measuring instrument
in its frequency offset mode. Operation of the Microwave Converter is, therefore, under control of the
measuring instrument.
20. Operating Instructions
To operate the Microwave Converter, plug in the power cord and connect the signal and control cables as
indicated in Figure
3, Microwave Converter Interconnections and Test Set-up. Refer to Table 1, LO
Requirements, for LO power requirements.
This instrument does not have an orl/off switch or front-panel
power indicator light. Power is supplied
to the instrument as soon as
the power cord is plugged in
to the line voltage source.
9