HP 11793A User manual

OPERATING

AND

SERVICE

MANUAL

HP

11793A

M

I

C

R

0

WAVE

CONVERTER

September

1990

1 1793-9001 1

111111111111111111111111111111111111111111111111111111111111ll111

HEWLETT

PACKARD

CERTl FlCATlON

Hewlett-Packard Company certifies

that

this

product met its published specifications

ut

the time of shipment

from the factory. Hewlett-Packard further certifies 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 shipping charges to HP and

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

HP from 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 firmware will be uninterrupted or error free.

LIMITATION OF WARRANTY

The foregoing warranty shall not apply

to

defects resulting from improper or inadequate maintenance by Buyer,

Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside

of

the environmental

specifications for the product, or improper site preparation or maintenance.

NO OTHER WARRANTY

IS

EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

EXCLUSIVE

REMEDIES

THE REMEDIES PROVIDED HEREIN ARE 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'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

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 applies directly to instruments with 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 and related 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 ensure safe operation and to maintain the product in

a

safe

condition.

SAFETY EARTH

GROUND

A

uninterruptible safety

earth

ground must be 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 denotes a hazard. It calls attention to a procedure,

practice, or the like, which,

if

not correctly performed or adhered to,

could result in personal injury.

Do

not proceed beyond a

WARNING

sign

until the indicated conditions are fully understood and met.

CAUTION

A

CAUTION

note denotes

a

hazard.

It

calls attention to an operation

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

the indicated conditions are fully

understood and met.

2

Chapter

1

Regulatory Information (Updated March

1999)

Safety Considerations for this Instrument

WARNING

This product

is

a

Safety Class

I

instrument (provided with a

protective earthing ground incorporated in the power cord). The

mains plug shall only be inserted

in

a socket outlet provided with

a

protective earth contact. Any interruption of the protective

conductor inside or outside

of

the product is likely to make the

product dangerous. Intentional interruption is prohibited.

Whenever it

is

likely that the protection has been impaired, the

instrument must be made inoperative 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 terminal of the power source.

If

this product

is

not used as specified, the protection provided by

the equipment could be impaired. This product must be used in

a

normal condition (in which all means

for

protection are intact) only.

No

operator serviceable parts in this product. Refer servicing to

qualified personnel. To prevent electrical shock, do not remove

covers.

Servicing instructions are

for

use by qualified personnel only.

To

avoid electrical shock, do not perform any servicing unless you are

qualified to do

so.

The opening of covers

or

removal of parts is likely to expose

dangerous voltages. Disconnect the product

from

all

voltage sources

while it

is

being opened.

The power cord

is

connected to internal capacitors that my remain

live for

5

seconds after disconnecting the plug from

its

power supply.

For Continued protection against fire hazard, replace the line fuse(s)

only with

250

V

fuse(s)

or

the same current rating and type

(for

example, normal blow or time delay).

Do

not use repaired fuses

or

short circuited fuseholders.

Always

use the three-prong ac power cord supplied with this

product. Failure to ensure adequate earth grounding by not using

this cord may cause product damage.

This product

is

designed

for

use in Installation Category

I1

and

Pollution Degree

2

per

IEC

1010

and

IEC

664

respectively.

FOR

INDOOR

USE

ONLY.

This product has autoranging line voltage input, be sure the supply

voltage

is

within the specified range.

3

Regulatory

information

(Updated

March

1999)

To prevent electrical shock, disconnect instrument

from

mains (line)

before cleaning.

Use

a

dry cloth

or

one slightly dampened with water

to clean the external case parts.

Do

not attempt to clean internally.

Ventilation Requirements: When installing the product in a cabinet,

the convection into and out

of

the product must not be restricted.

The ambient temperature (outside the cabinet) must be less than the

maximum operating temperature

of

the product by

4"

C

for

every

100

watts dissipated in the cabinet.

If

the total power dissipated in 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 Standards Association.

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

Verify that 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

the protective earth terminal will cause a potential

shock

hazard that could result

in

personal injury.

(Grounding one conductor of a two conductor outlet

is

not sufficient protection).

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 many points 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 11 793-60006)

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

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 10 and 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 18 to 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

amplif ier.

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 8 120- 18 38) 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 8901 B 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 to the 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

7

1

6

2

3

6

2

3

7

6

Cable

Color

For

Use

In Country

Cable

Length

(inches)

90

Plug

Description

I

250V

Straight'BS1363A

90"

Mint Gray

United Kingdom,

Cyprus, Nigeria,

Rhodesia,

Singapore

I:".J

00

I

250V

Gray

Austrailia,

New Zealand

79

87

79

Mint Gray

East and West

Europe, Saudi

Arabia, Egypt,

(unpolarized in

many nations)

Straight'CEE7-Y11

goo

81 20-1 692

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

36

80

36

79

Black

Jade Gray

Gray

I

250 V

Switzerland

~~

United

States,

Canada

Straight'NEMAG-15P

79

Gray

Denmark

Straight'DHCK107

90"

I

250V

Straight'lEC83-B1 79 Black

South Africa, India

Straig ht'CEE22-VI

(Systems Cabinet Use)

'Part number shown for plug

is

industry identifier for 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 "Mechanical Options" 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

Microwave Converter Model

11793A

FREPUENCY

OUTPUT

OFFSET TTL

0

I

:::::

D00000

0000

0

0000

00

0

0000

0

000000

00000

Q

HP

6902A

MEASURING RECEIVER

SI

II

FREOUENCY

I

OFFSET MODE RF

INPUT INPUT

I

OR

1

Figure

3.

Microwave Convertor Interconnections and Typical Test Setup

21.

Panel Features

Front-panel features consist of the

LO

input, RF input, and the IF output connectors. For Options

020

and

021,

the connectors are located on the rear panel. See Figure

4,

Front-Panel Features

for the

standard locations of front-panel connectors.

Rear-panel features are the Line Voltage Select Switch, Fuse, Power Cord and the Frequency Offset input

connectors. See Figure

5,

Rear -Panel Features.

22.

Operator Checks

Operator’s checks consist of insuring that a fuse of proper value is installed, that the power cord is plugged

in, that the signal/control lines are connected, and that both the measuring instrument and the external

LO

are connected and turned on.

23.

Operator Maintenance

The only maintenance needed by the Microwave Converter is replacement of the primary power fuse.

To replace the fuse, insert a standard screwdriver into the fuseholder and push in against the spring. Turn

counterclockwise (while pushing with a slight pressure) until the fuseholder is released. Remove and

replace the fuse with

a

new fuse of identical value.

10

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