Hp Tv Converter Box 11793A Users 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

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

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

79 Gray

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

Model

11793A

Microwave Converter

IF OUTPUT: The

IF

output,

Type-N connector, couples the IF

output signal into measuring in-

strument

RF

input.

LO INPUT: The LO input, 3.5 mm

connector, couples an external

oscillator signal source to the

instrument.

RF

INPUT: The RF input, 3.5mm

connector couples the microwave

input signal into the instrument.

The maximum allowable input

power is +30 dBm (lwatt), the

input impedance is 50 ohms

nominal.

Figure

4.

Front-Panel Features

RF INPUT is a rear-panel input

for the

RF

signal (instead of the

standard front-panel connection)

for option

020,

021 instruments.

IF OUTPUT is a rear-panel out-

put for the

IF

signal (instead of

the standard front-panel connec-

tion) for the option 020, 021

instruments.

FREQ OFFSET INPUT enables

the measuring instrument to con-

trol the switching circuitry.

T

I

LINE VOLTAGE SELECTION

SWITCH:

11

5

or 230 Vac

LO INPUT is a rear-panel input

for the LO signal (instead of the

standard, front-panel connection)

for the option

020,

021

instruments.

LINE VOLTAGE POWER CORD

CONNECTION

-1

FUSE HOLDER AND

.75A

FUSE

Figure

5.

Rear -Panel Features

11

Microwave Converter Model

1

1793A

24.

Performance Tests

Description

Performance testing consists of a general functional check to verify the instrument down-converts and

switches RF paths properly. Since the Microwave Converter is designed to operate with specific HP

instrumentation, no substitution is recommended.

Equipment

Measuring Instrument

.................

HP 8901B or HP 8902A

Sensor Module

.........................

HP

1

7

9 2A

Microwave

LO

Source

.................

See Table

4

Microwave Signal Source

..............

HP 8673B (up to 26 GHz Amplifier)

HP

8673B Option 008 (up to

26

GHz,

(w/o Amplifier)

HP 8672A Option

008

(up to 18 GHz,

w/o Amplifier)

RF

Signal Source

......................

HP 8642B, HP 8660C/86602B, HP 8662A,

HP

8663A

Procedure

1.

Connect the equipment as shown in Figure 3. Set the two microwave sources to

CW.

Set the

microwave signal source to

0

dBm.

NOTE

Check that the measuring instrument's RF Power calibration factors

match the sensor module. The measuring instrument must be in

frequency offset mode in order to enter the

RF

Power calibration

factors into the Frequency Offset mode RF Power Cal Factor Table.

2.

Set the microwave

LO

source frequency and level as listed in Table

6.

Performance Tests

Znstrument Settings.

For each setting, perform the following steps:

a. Set the frequency of the microwave signal source as listed.

b.

On the measuring instrument, key in 27.3 SPCL. Key in the frequency of the microwave LO

source (in

MHz),

then press the MHz key.

c. On the measuring instrument, measure RF frequency and

RF

Power (in that order). The

measuring instrument's display should read as indicated in table

6.

(The listed frequency is a

nominal value.)

3.

Set the RF signal source

to

1270 MHz. and level

-

10 dBm.

4.

On the measuring instrument, key in 27.3 SPCL and enter

0

MHz. This leaves the measuring

instrument in frequency offset mode with

0

MHz offset. Measure RF Frequency and RF Power

(in that order).

12

Model 11793A

Frequency

(MHz)

2

000

1

0

000

17

200

18

000

18 000

Microwave Converter

level

(dBm)

Frequency

(MHz)

-1

5

2

000

-1

5

10

000

-1

5

17

200

-1

5

18

000

-15 18

000

Table

6.

Performance Test Instrument Settings

25

900

25

900

LO

Source

-1

5

25

900

-15

25

900

Frequency

(MHz)

I

Level

(dBm)

2 063

10

063

17

263

18

063

18

063

+8

0'

+8'*

25

963'"

0'

25

963"'

I

+8"

Signal Source Measuring Instrument

I

Display

'Use

this

level

only if the

LO

amplifier is installed (Option

001,

011

or

021).

"Use this

level

only if the

LO

amplifier

is

not installed (Option

001.

011

or

021).

"'Omit this step if maximum system frequency is

18

GHz.

25.

Adjustments

The only adjustment necessary is setting the +12V power supply. Connect a dc voltmeter to the case of

VR3. (See Service Sheet

3.)

Adjust AIR5 on the AI Switch Control Assembly until the voltage

is

between

+11.9

and

+I21

Vdc.

26.

Replaceable Parts

Table

7

lists all replaceable parts

in

alphanumeric order by reference designator. Table

8

contains the

names and addresses that correspond to the manufacturer's code numbers.

27.

Replaceable Parts

List

Table 7,

Replaceable Parts.

is organized as follows:

a. Electrical assemblies and their components in alphanumeric order by reference designation.

b. Chassis-mounted parts and mechanical parts in alphanumeric order by reference designation.

The following information

is

provided for each part:

a. The Hewlett-Packard part number.

b.

Part number check digit

(CD).

c. The total quantity (Qty) is provided on the first entry of the part number.

d.

The

description of the part.

e.

A

typical manufacturer of the part in a five-digit code.

f.

The manufacturer's number for the part.

13

Microwave Converter Model

1

1793A

28.

Parts List Updating (Manual Changes Supplement)

Production changes to the instrument made after the publication date of this manual are denoted by a

change in the serial-number prefix. Changes to the parts list are recorded by serial prefix on a Manual

Changes supplement. Also, errors in the manual are noted in the Errata portion of the Manual Changes

supplement.

29.

Illustrated Parts Breakdowns

The components that compose the Microwave Converter are illustrated in the component locator diagrams

in Figure 13, and in the illustrated parts breakdown photographs of Figures

7

and

8.

14

Model

11793A

Table

7.

Replaceable

Parts

Replaceable

Parts

Reference

Designation

I

A1

R1

RlCl

R1C2

RlC3

RlC4

RlC5

A1C6

R1C7

R1C8

AlCRl

RlCR2

RlCR3

RlCR4

R1CR5

RlCR6

A1CR7

RlCR8

RlCRO

RlDSl

RlJl

R1Q1

R1Q2

R1Q3

RlQ4

RlQ5

RlRl

R1R2

R1R3

R1R4

R1R5

RlR6

R1R7

R1R8

R1R9

RlRlO

PlRll

RlR12

R1R13

R1R14

RlR15

RlR16

FllR17

RlR18

RlUl

RlU2

RlU3

RlVRl

RlVR2

RlVR3

RlVR4

HP

Part

Number

11793-6000:

0120-0197

0180-2302

1400-0249

0180-1794

0160-5098

0160-4832

0160-5555

190

1-002

8

1901-0028

1901-0050

190

1-

0050

1901-0050

1990-0717

1251-5717

1884-0273

0515-0655

1854- 0477

1854-0477

0757-0821

0698-3442

2100-0568

0698-3150

0757-0984

0698-3150

0757-0438

0698-3150

0757-0444

0698-3150

3826-0191

1820-1417

1820-1197

1902-3323

1902-0460

1826-0423

0340-0875

0515-0655

0535-0004

2190-0584

11793-0001

1826-0367

-

1

I

4

8

1

0

3

6

4

0

5

3

6

0

4

7

8

9

1

6

4

6

3

6

1

6

3

6

9

1

6

!

I

(

5

-

ItY

-

1

3

1

2

7

1

4

1

3

1

10

1

4

2

1

-

Description

SWITCH CONTROL

RSSEMBLY

CRPRCITOR-FXD .22UF

+-lo%

5CVDC CER

CRPRCITOR-FXO .OlUF

+-lo%

lOOVDC CER

CRPRCITOR-FXD .33UF +-5% lOOVOC

DIODE-PWR RECT 400V 750MR 00-29

DIODE-PUR RECT 400V 750MF) DO-29

DIODE-SWITCHING 8OV 200MR 2NS 00-35

DIODE-SWITCHING

8OV

200MA

2NS DO-35

DIODE-SWITCHING 8OV 200MR 2NS DO-35

DIODE-SWITCHING 8OV 200MR 2NS 00-35

DIODE-SWITCHING 8OV

ZOOMFI

2NS 00-35

DIODE-SWITCHING 8OV

200MA

2NS 00-35

DIODE-SWITCHING 8OV 200MA 2NS DO-35

LED-LRMP LUM-INT=800UCD IF=30MR-MRX

CONNECTOR 10-PIN

M

POST TWE

RESISTOR 1.21K

1%

.5W F TC=0+-100

RESISTOR 23i-l% .125W F TC=0+-100

RESISTOR 237

1%

.125W F TC=0+-100

RESISTOR 237

1%

.125W

F

TC=0+-100

RESISTOR-TRMR

100

10%

C TOP-RDJ 1-TRN

RESISTOR 2.37K

1%

.125W

F

TC=0+-100

RESISTOR

10

1%

.5W

F

TC=0+-100

RESISTOR 2.37K

1%

.125W F TC=O*-100

RESISTOR 5.11K

1%

.125W

F

TC=0+-100

RESISTOR 2.37K

1%

.125W

F

TC=0+-100

RESISTOR 12.1K

1%

.125W

F

TC=0+-100

RESISTOR 2.37K

1x

.l25W F TC=0+-100

RESISTOR 2.37K

1%

.125W

F

TC=O+-100

RESISTOR 2.37K

1%

,125W

F

TC=0+-100

RESISTOR 2.37K

1%

.125W

F

TC=0+-100

RESISTOR 2.37K

1%

.125W

F

TC=0+-100

RESISTOR 2.37K

1%

.125W

F

TC=0+-100

RESISTOR 2.37K

1x

.125W

F

TC=0+-100

IC COMPQRRTOR GP

DUQL

TO-100

PKC

IC GRTE TTL LS NRND QURD 2-INP

IC GATE TIL

LS

NRND OUR0 2-INP

DIODE-ZNR 42.2V 5% 00-35 PD=.4W TC=*.08X

DIODE-ZNR 12V

5%

DO-35 PD=.4W TC=+.077%

IC V RGLTR TO-3

INSULATOR-XSTR THRM-CNDCT

SCREW-MACH M3 X 0.5 8MM-LG PRN-HD

NUT-HFX

DBL-CHRM

M3

X

0.5

2.4MM-THK

WASHER-Lk-HLtL 3.0-

MM

3.1-MM-ID

HERT SINK

IC 78M05C V RGLTR TO-39

-.

See introduction to this section for ordering information.

Mf

r

Code

28480

56289

06383

56289

16299

28480

28420

28480

28420

3L585

00000

04713

28480

24546

28480

24546

28480

24546

27014

01295

28480

2701r

28481

0000l

00001

28481

04713

Mfr Part Number

11793-60001

150D225X9020R2

39D207G050FJS-DSB

PLTlM-8

150D226X9035R2

CRC05X7R224J050R

0160-4832

0160-5555

1901-0028

1901-0050

1901-00

50

190

1-

00

5

0

1901-

00

50

1901-0050

HLMP- 150

1

1251-5717

2N4101

ORDER

BY

DESCRIPTION

2N2222fi

2N2222R

2N2222Q

2N2222A

0757-0821

C4-1/8-TO-237R-F

C4- 1/8-TO- 23 7R-F

2100-0568

C4- 1/8-TO- 23 71-F

0757-0984

C4-1/8-TO-2371-F

C4-1/8-TO-5111-F

C4-1/8-TO-2371-F

C4-

1/

8-T

0

-

12

-F

C4-1/8-TO-23 71-F

C4-1/8-TO-2371-F

C4-

1/8-TO-

23 71-F

C4-1/8-TO-2371-F

‘4-1/8-T0-2371-F

Lfl319H

SN7 4LS2

6N

SN74LSOON

MC78M05CG

f

Indicates factory selected value

15

Replaceable

Parts

Model

11793A

Table

7.

Replaceable Parts

Reference

Designation

FIT

1

F1

FL1

J1

J2

J3

J4

J5

J6

J7

J8

J9

J10

ZS2OA

AND

ABOVE

MPI

MPZ

24071

ONLY

HP

I

MP

2

HP Part

Number

11793-60003

2110-0063

2110-0566

2110-0565

2110-0569

2190-0068

9135-0229

1400-0025

0515-0381

0535-0006

2190-0586

3050-0893

08673-60040

2190-0016

2950-0043

11793-60008

1250-0914

1250-0915

5040-0306

08671-2027

08555-20093

08555-20094

2190-0104

2950-0132

08673-60040

2190-0016

2 950-

0

043

08673-6004C

2190-0016

2950- 0043

08673-6004C

2190-0016

2950-0043

08673-6004C

2190-0016

2950-0043

11793-60001

1250-0914

1250-0915

5040-0306

08671-2027

08555-2009:

08555-2009d

2190-0104

2950-0132

1250-0870

5 021- 5801

0515-1227

5021-5832

0515-1331

5020-8801

0515-1227

5020-8832

2510-0192

-

- -

1

-

6

2

0

9

3

5

1

0

3

1

2

9

3

8

1

7

8

0

5

6

0

6

9

3

8

9

3

8

9

3

8

9

3

8

1

7

8

0

5

6

0

6

4

0

8

7

5

4

8

1

6

-

QtY

-

1

2

17

1

22

3

5

2

6

1

6

2

8

1

6

2

8

Description

3

DB RTTENURTOR

FUSE .75A 250V NTD 1.25X.25 UL

FUSEHOLDER-EXTR POST 12R 250

V

FUSEHOLDER CAP 12R MRX FOR UL

FUSEHOLDER COMPONENT NUT; THRERD M12.7

WASHER-LK INTL T 1/2 IN ,505-IN-ID

FILTER-LOW PRSS

DC

TO

800MHZ;

M/F

SUR

CLAMP-CRBLE .5-DIR .5-WD NYL

SCREW-MRCH M4 X 0.7 10MM-LG PAN-HD

NUT-HEX OBL-CHRM M4 X 0.7 3.2Mfl-THK

WASHER-LK HLCL 4.0

MM

4.1-MU-ID

WRSHER-FL MTLC 4.0

MM

4.4-MM-ID

CONNECTOR ASSEMBLY "LO INPUT"

(LEFT SIDE: STRNDRRO ONLY)

WASHER-LK INTL T 3/8 IN ,377-IN-ID

NUT-HEX-DBL-CHRM 3/8- 32-THD

.09

4-IN-THK

CONNECTOR ASSEMBLY TYPE-N "IF OUTPUT"

_.

(STRNDRRD

AND

OPTION

010

ONLY)

CONNECTOR-RF RPC-N FEM UNMTD 50-OHM

TONTFITT-RF CONN

SER

RPC-N FEMRLE

BODY, BULKHERD

WRSHER-LK INTL T 7/16 IN .439-IN-I0

NUT-HEX-DBL-CHRM 7/16-28-THD .094-IN-THK

CONNECTOR QSSEMBLY

"RF

INPUT"

(STANDARD AND OPTION

010

ONLY)

WASHER-LK INTL T 3/8 IN ,377-IN-ID

NUT-HEX-DBL-CHAM 3/8-32-THD .094-IN-THK

CONNECTOR QSSEMBLY "LO INPUT"

(RIGHT SIDE: OPTION

010

ONLY)

WASHER-LK INTL T 3/8 IN .377-1N-ID

NUT-HEX-DBL-CHAM 3/8-32-THD ,094-IN-THK

CONNECTOR ASSEMBLY "RF INPUT"

(REAR PRNEL: OPTION 020 ONLY)

WRSHER-LK INTL T 3/8 IN ,377-IN-ID

NUT-HEX-DEL-CHRM 3/8-32-THD .094-IN-THK

CONNECTOR ASSEMBLY "LO INPUT"

__

-

___

~~

(RERR PANEL: OPTION 020 ONLY)

WASHER-LK INTL T 3/8 IN ,377-IN-ID

NUT-HEX-DBL-CHRM 3/8-32-THD .094-IN-THK

CONNECTOR ASSEMBLY TYPE-N "IF OUTPUT"

(RERR PRNEL: OPTION 020 RND 021 ONLY)

CONNECTOR-RF APC-N FEU UNMTD 50-OHM

CONTACT-RF CONN SER RPC-N FEMRLE

INSULRTOR

INSULATOR

CONTACT JRCK

BODY, BULKHERO

WASHER-LK INTL T 7/16 IN ,439-IN-IO

NUT-HEX-DBL-CHRM 7/16-28-THD .094-IN-THb

CONNECTOR-RF BNC FEM SGL-HOLE-RR 50-OHM

FREQUENCY OFFSET INPUT"

PART OF W12 (NOT SEPRRRTELY REPLRCERBLE

PRRT OF

WlO/W11

(NOT SEPARRTELY

REPLACEABLE)

FRRME FRONT

SCREW-MRCH

M3

X 0.5 Sflfl-LG 90-DEG-FLH-HD

SIDE STRUT

SCREW-MACH M4

X

0.7 6MM-LG FLRTHD

FRONT FRAME

SCREW-MFICH M3 X 0.5 6MM-LG 90-DEG-FLH-HI

SIDE STRUT

SCREW-MACH 8-32 .25-IN-LG

100

DEG

Mf

r

Eode

28480

00000

28480

00000

28480

9D949

28480

00000

2848C

ooooc

2848C

ooooc

2848C

2848(

OOOO(

2848(

OOOO(

2848(

9D94!

2848t

28481

00001

28481

28480

00000

28480

00000

28481

2848

28481

0000

Mfr Part Number

11793-60003

2110-0063

2110-0566

2110-0565

2110-0569

2190-0068

9135-0229

1400-0025

ORDER BY DESCRIPTION

2190-0586

3050-0893

08673-60040

2190-0016

ORDER BY DESCRIPTION

11793-60008

1250-0914

131-149

5040-0306

08671-2027

08555-20093

08555-20094

2190-0104

ORDER BY OESCRIP

TION

08673-60040

2190-0016

ORDER BY DESCRIPTION

08673-60040

2190-0016

ORDER BY DESCRIPTION

08673-60040

2190-0016

ORDER BY DESCRIPTION

08673-60040

2190-0016

ORDER BY DESCRIPTION

11793-60008

1250-0914

131-149

5040-0306

086

7 1-2 027

08555-20093

08555-20094

2190-0104

ORDER BY DESCRIPTION

1250-0870

5021-5801

ORDER BY DESCRIPTION

5021-5832

ORDER BY DESCRIPTION

5020-8801

0515-1227

5020-8832

ORDER BY DESCRIPTION

See

introduction

to

this section for ordering information.

*

Indicates factory selected value

16

Model

11793A

Replaceable

Parts

Reference

Designation

2401AOWLY

MP3

MP4

MP

5

2520.4

AWD ABOVE

MP6

MPl

MPB

21071

OWLY

MP6

MP1

MP8

MP9

MPlO

25201

AWD ABOVE

WPll

24014

ONLY

MPll

MP12

NP13

NP14

MP15

MP16

MP17

MP19

NP20

MP21

MP22

MP2 3

NP24

MP25

s1

52

T1

HP Part

Number

5020-8802

5001-043a

0515-0680

0590-1203

5040-7202

5

06

1-

943

5

5061-9452

11793-20001

5060-9a35

50.so-ga52

11793-0000

11793-0001

11793-0000

5061-9447

5060-9847

03ao-i705

05i5-03ai

2i90-05a6

5040-7201

11793-0000

0515-0381

2190-0586

11793-2000

8160-0472

11793-0000

0515-0381

11793-0001

2190-05a6

05i5-06ao

11793-0000

0515-0373

0520-0130

2190-0045

2190-osa4

3050-009a

3050-0891

3050-0893

11793-0001

11793-0000

05i5-03ai

2i90-05a6

6960-0023

6960-0009

11793-200C

11793-6001:

0515-0446

11793-6OOC

0515-0446

9100-4014

0515-1137

2igo-osa4

3050-0agi

7120-4559

-

u

3

-

a

5

9

7

a

l

3

l

0

1

9

2

1

0

?

4

a

0

3

2

4

3

2

8

9

3

2

3

5

4

3

1

0

6

7

9

6

3

2

9

1

a

6

5

1

5

1

7

9

0

7

5

-

1

12

1

2

1

2

1

3

1

2

4

12

2

1

a

1

2

3

2

6

1

4

2

-

Table

7.

Replaceable Parts

Description

RERR FRRME

SCREW-MRCH M3 X 0.5 6MM-LG PAN-HD

THREROEO INSERT-NUT M3X0.5 ,059-IN-LG

TOP TRIM STRIP

SIDE TRIM 3

1/2

COVER, TOP

COVER, SIDE

RERR PRNEL RSSEMBLY

TOP COVER

SIDE COVER

RERR PRNEL

FRONT DRESS PRNEL

(EXCEPT OPTIONS

010

FIND

011)

FRONT DRESS PRNEL

(OPTIONS

010

RNO

011

ONLY)

FRONT SUB-PANEL

COVER. BOTTOM

BOTTOM COVER

FOOT FULL-l/2MOD

MRIN DECK

STANOOFF-1/4 TURN 6.35

MM

LG:

10.16

MM

SCREW-MRCH

M4

X 0.7 10MM-LG PAN-HD

WASHER-LK HLCL 4.0

MM

4.1-MM-ID

NIXER HOUSING

MD

SCREW-MRCH

M4

X 0.7 10MM-LG PAN-HO

WgSHER-LK HLCL

4.0

MM

4.1-MM-IO

RFI STRIP

(*

ORDER QTY

2

FT)

RF COVER

SCREW-MRCH

M4

X 0.7 10MM-LG PRN-HO

WASHER-LK HLCL 4.0

MM

4.1-MM-IO

RMPLIFIER BRACKET (OPTIONS

001,

011

RND

020

ONLY)

SCREW-MRCH M3 X

0.5

SMM-LG PRN-HD

MIXER BRACKET

SCREW-MACH M3 X

0.5

10MM-LG PRN-HO

SCREW-MRCH 2-56 .375-IN-LG PRN-HO-PO21

HLCL

MTLC

ERR

NO.

3.0

NO.

3.0

4.0

TRRNSFORMER BRRCKET

2

.oaa-IN-Io

MM

3.1-MM-ID

2

.094-IN-I0

MM

3.3-MM-ID

MM

4.4-MM-IO

NOT ASSIGNED

NOT RSSIGNEO

GRONNET, SEMI-RIGID CRBLE

CORXIRL SWITCH (OPTIONS

001,

011

AN0

021

ONLY)

SCREW-MACH M3 X

0.5

22MM-LG PRN-HO

CORXIRL SWITCH (EXCEPT OPTIONS

001,

011

AND

021)

SCREW-MRCH M3 X

0.5

22MM-LG PAN-HD

TRRNSFORMER PWR 115/230V

SCREW-MRCH M3 X

0.5

50MM-LG PRN-HO

WASHER-LK HLCL 3.0

MM

3.1-MM-ID

WRSHER-FL MTLC 3.0

MM

3.3-MM-IO

LABEL-WRRNING .S-IN-WO 1-IN-LG MYLRR

Mfr Part Number

5020-8802

0515-0680

0590-1203

5040-7202

5001-0438

5061-9435

5061-9452

11793-20009

5060-9835

11793-00004

5060-9a5~

11793-00005

11793-00012

11793-00003

5061-9447

5060-9847

5040-7201

11793-00001

ORDER BY DESCRIPTION

11793-20005

ORDER BY DESCRIPTION

8160-0472

03ao-i705

2190-05a6

11793-00002

ORDER BY DESCRIPTION

11793-00014

2190-0586

0515-0680

11793-00007

ORDER BY DESCRIPTION

2190-0045

2190-0584

3050-009a

3050-0agi

3050-0a93

11793-00017

11793-00006

ORDER BY DESCRIPTION

2190-05a6

6960-0023

6960-0009

11793-20007

11793-60002

0515-0446

11793-60002

0515-0446

9100-4014

0515-

1137

3050-0891

2i90-05a4

See introduction to this section

for

ordering information.

*

Indicates factory selected value

17

Replaceable

Parts

Model

1

1793A

Reference

Designation

u1

U2

u3

w1

w2

w3

w4

w5

W6

w7

W8

w9

w10

w11

w12

W13

W14

W15

W16

W17

W18

w19

w20

w21

w22

HP

Part

Number

0955-0218

0520-0130

0955-0237

0520-0133

2190-0045

2950-0132

0955-0217

0515-0680

2190-0584

3050-0891

11793-20002

11793-20003

11793-20004

11793-20101

11793-20103

11793-20102

11793-60013

11793-20104

11793-60011

0515-1084

0535-0004

2190-0584

11793-60012

11793-60007

0535-0004

2190-0584

11793-60010

1250-0952

1250-0958

1250-0960

1250-0964

1400-0025

2190-0102

2950-0035

11793-20106

11793-20107

11793-20108

11793-20109

11793-20110

11793-20111

11793-60009

11793-60006

8120-1838

-

I

3

-

7

1

0

4

8

6

5

0

7

1

2

3

1

3

2

8

4

6

5

9

0

7

0

9

0

5

3

9

3

7

0

8

6

7

8

9

2

3

2

9

8

-

1

2

1

2

1

4

1

-

Table

7.

Replaceable

Parts

Description

RMPLIFIER-MICROWRVE FREQ RRNGE: l8GHZ TO

(OPTIONS

001,

011

RND 021 ONLY)

SCREW-MRCH 2-56 .375-IN-LG PRN-HO-PO21

AMPLIFIER-RF

MOD.

SMR

__

-

SCREW-MRCH 2-56 .5-IN-LG PRN-HO-PO21

WRSHER-LK HLCL NO. 2 .088-IN-I0

NUT-HEX-OBL-CHRM 7/16-28-THO ,094-IN-THK

MIXER-MICROWFIVE FREQ RRNGE: LO: 2.0GHZ

SCREW-MRCH M3

X

0.5

6MM-LG PRN-HO

WRSHER-FL MTLC 3.0

MM

3.3-MM-ID

WRSHER-LK

HLCL

3.0

nn

3.1-MM-IO

LO INPUT CRBLE, SEMI-RIGID:

J1

TO U3

(STANORRO ONLY)

IF OUTPUT CRBLE, SEMI-RIGID: J2 TO S2

ISTRNORRO

RNO

OPTIONS

001.

010

RNO

011

nNi

v\

RF

iNPUT CRBLE, SEMI-RIGIO: J3 TO 52

(STRNORRD RND OPTIONS

001,

010

FINO 011

ONLY)

MIXER OUTPUT CRBLE RSSEMBLY, FLEX-CORX

(912): U3 TO FL1

:F

RMPLIFIER OUTPUT CABLE RSSEMBLY,

1

FLEX-CORX (912): U2

TO

S2

LO RMPLIFIER INPUT CRBLE, SEMI-RIGID:

S1

TO U1 (OPTIONS

001.

011

RND 021 ONLY)

MODULE HRRNESS RSSEMBLY (STRNORRO AN0

OPTIONS

010

RND 020 ONLY)

SCREW-MACH

M3

X

0.5

12MM-LG PRN-HO

NUT-HEX OEL-CHRM M3 X 0.5 2.4MM-THK

MODULE HRRNESS RSSEMBLY (OPTIONS

001,

011,

AN0 021 ONLY)

WRSHER-LK

HLCL

3.0

nn

3.1-MM-ID

MoouLE

CRBLE,

FLRT:

~i~i

TO

~9

NUT-HEX DBL-CHRM 113 X

0.5

2.4MM-THK

WRSHER-LK HLCL 3.0

MM

3.1-MM-ID

COiVRCT-RF CONN BNC/TNC:FEM CTR

SLEEVE-RF CONN

SER

BNC/TNC

CLRMP-CRBLE .5-DIR .5-WD NYL

WRSHER-LK INTL

T

15/32 IN .472-IN-I0

NUT-HEX-DBL-CHAM 15/32-32-THO

CRBLE RSSEMBLY. CORX:

38

TO

R1

BUSHING RF CONN BNC/TNC: FOR INTL

NUT-RF

CONN

BNCITNC:

cLRnP

NUT

FOR

LO INPUT CABLE, SEMI-RIGID:

J4

TO

S1

(RIGHT SIDE: OPTION

011

ONLY)

RF INPUT CRBLE, SEMI-RIGID: J5 TO

S1

(OPTIONS 020 AND 021 ONLY)

IF OUTPUT CRBLE, SEMI-RIGID: J7 TO 52

(OPTIONS 020 RND 021 ONLY)

LO

INPUT CRBLE, SEMI-RIGID:

36

TO

(OPTION 020 ONLY)

LO INPUT CRBLE, SEMI-RIGID:

J6

TO

(OPTION 021 ONLY)

LO INPUT CRBLE, SEMI-RIGID: J4 TO

(RIGHT SIDE: OPTION

010

ONLY)

LO INPUT CRBLE, FLEX: 35MM MRLE

(ACCESSORY)

(RCCESSORY)

CRBLE RSSY-COAX 50-OHM 12-IN-LG

J

IF

OUTPUT

CABLE.

FLEX:

SM

MRLE

(ACCESSORY)

u3

s1

u3

GK

Mf

r

Code

28480

00000

28480

00000

28480

00000

28480

00000

28480

00000

28480

24931

28480

24931

28480

00000

28480

2848C

Mfr Part Number

0955-0218

ORDER

BY DESCRIPTION

0955-0237

ORDER BY DESCRIPTION

2190-0045

ORDER BY DESCRIPTION

0955-0217

0515-0680

2190-0584

3050-0891

117 93- 20002

11793-20003

11793-20004

11793-20101

11793-20103

11793-20102

11793-60013

11793-20104

11793- 60011

0515-1084

ORDER EY DESCRIPTION

2190-0584

11793-60012

11793-60007

ORDER

BY DESCRIPTION

2190-0584

11793-60010

C232-2

CS

105-3

1250-0960

N126-2

1400-0025

2190-0102

ORDER BY DESCRIPTION

11793-20106

11793-20107

11793-20108

11793-20109

11793-20110

11793-20111

11793-60009

11793-60006

8120-1838

See introduction to this section for ordering information.

*

Indicates factory selected value

18

Model

1

1793A

Microwave Converter

Mf

r

Manufacturer Name

Code

Table

8.

Code List

of

Manufacturers

Address

ANY 6ATISFACTORY SUPPLIER

TEXAS INSTR INC SEHICOND CBPNT DIU

BOTOROLA SEBICONDUCTOR PRODUCTS

Zip Code

I

PANDUIT CORP

CORNING GLASS

UKS

COHPONENT DIU

CORNING GLASS

WORKS

(BRADFORD)

SPECIALTY CONNECTOR CO INC

NbTIONnL

SEBICONDUCTOR CORP

HEULETT-PACKARD

CO

CORPORATE

HQ

RCA CORP SOLID STATE DIV

SPRhCUE ELECTRIC CO

AHPWENOL SALES DIU

OF

BUNKER-RABO

DALLAS TX

PHOENIX

A,?

TINLEY PARK

11..

RALEIGH

NC

BRADFOR D PA

GREENWOOD IN

SANTA CLARA

CA

PAL0

ALTO CA

SOMERUILLE

NY

NORTH

ADABS

HA

BROADUIEW

IL

Zip Code

75222

85008

60477

27604

16701

46227

94304

01247

60153

95051

75222

85008

60477

27604

16701

46227

94304

95051

01247

60153

19

Microwave Converter Model

11793A

M P8

MP7\\\

MPlO

1 1

,/

/MP9

MP12

NOTE:

MP21

AND

MP22

ARE

HOLE PLUGS.

Figure

6.

Cabinet Parts

20

Model

11793A

Microwave Converter

W1 (Standard)

W19 (Option 010) u3

J1 W17 (Option 020) MP25 (Under MP18) MP18 MP25 W3 AT1 W2 MP25 J2 J3

\

\Ill///

MP14

MPl5

(Gasket)

w7

w12

A1

W13

MP20

T1

F1

52

w10

J10

W8

u2

MP13

MP16

f11

Figure

7.

Illustrated Parts Breakdown

for

Standard and Option

010

21

Microwave Converter Model

11

793A

J1

(1

J4

(I

J6

(I

Dption

001

3ption

011

3ption 021

s1

MP14

MP15

(Gasket)

A1

MP20-

W13’

T1

F1’

only) W4 (Option

001

only)

W6

u1

MP18

u3

W3 W2 J2

only) W14 (Option 011 only)

I

/

(Under

/

52

/

W8

/

,w11

eJ11

,

w7

u2

MP13

f11

MP16

Figure

8.

Illustrated Parts Breakdown

for

Options

001,

and

0

I I

22

Model 11793A Microwave Converter

30.

Ordering Information

To

order a part listed in the replaceable parts table, include the Hewlett-Packard part number (with the

check digit) and the quantity required. Address your order to the nearest Hewlett-Packard office. The

check digit will ensure accurate and timely processing of your order. To order a part that is not listed in

the replaceable parts table, include the instrument model number, instrument serial number, description

and function of the part, and the quantity of parts required. Address the order to the nearest

Hewlett -Packard office.

31.

Manual Changes

These paragraphs contain manual change instructions for backdating this manual for HP Model

Microwave Converters with the serial number prefix 2407A. 1793A

Instruments with Serial Prefix 2407A have System I1 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.

In Table

7.

Replaceable

PUY~S,

both English and Metric thread part numbers are listed for the System I1

cabinet parts. These correct part numbers are referenced under the instrument’s serial number prefix.

Instruments with the serial number prefix 2407A have MP3 (rear frame), MP8 (rear panel), and associated

english thread hardware, that are screwed together. These parts have been changed to a riveted, one piece

assembly that

is

referenced to MP8. To replace MP8 you must order the Rear Panel Assembly

1

1793-20009, and the metric screws for the side struts and rear feet.

32.

SERVICE

33.

Principles of Operation

Simplified

Block

Diagram

A

simplified block diagram of the Microwave Converter is shown in Figure

10.

The signal at the RF

INPUT connector is routed through an input switch either to the Direct Path (and out the IF OUTPUT

connector), or to the Down-Convert Path. The Down-Convert Path has a

3

dB RF Attenuator (to improve

input

SWR),

a

Mixer (tte down-converter), an IF Low-pass Filter (to remove the

sum

component of the

mixing process while passing the difference component), and a

+1S

dB IF Amplifier (to restore signal loss

through the Down-Convert Path).

Usually, the

LO

frequency selected is higher than the frequency of the input signal. (The measuring

instrument assumes this.) The difference frequency (the IF) is filtered by the IF Low-Pass Filter, which

has a

3

dB corner of

800

MHz. The IF should be kept between the range of 10 and 700 MHz.

If the instrument has the optional LO Amplifier installed, the measuring instrument automatically

switches in the amplifier whenever an LO frequency greater than

18

GHz is selected.

23

Microwave Converter Model

1

1793A

Level

at

INPUT

RF

LO

FREQ

U1A U1B U3A U3B

Path

Amp

OFFSET

1

6

Pin 3 Pin

6

Direct out

<2.0v

H

L

H H

Down-Convert In

2.0 to

3.w

H

L L

Down-Convert Out

>3.av

L

H

L

Service Sheets

1

and

2

(Input Signal Down-Converter)

U3C

Q2

Q3

Q4

Q5

8

L

Off

Off On On

H On On

Off

L

Off

On

Off

On

A single input on the rear panel: the FREQ OFFSET INPUT, has three logic states which control both the

switching of the RF two paths, and the insertion of the optional LO Amplifier. The Level Comparator

senses the three states and drives the appropriate switches.

Service Sheets

1

and

2

are the schematic diagrams of the RF circuitry of the Microwave Converter.

Service Sheet

1

(SS

1)

documents the standard Microwave Converter (without the LO Amplifier option),

and Service Sheet 2 (SS2) documents the Microwave Converter with the LO Amplifier.

The operation of the RF components

is

discussed in the principles of operation for the Simplified Block

Diagram above. Note that the RF switches

(SI

and S2), shown in the schematic, automatically interrupt

the current flowing into the energized solenoid once the plunger switches the RF contacts. The plungers

latch via permanent magnets.

Service Sheet

3

(AI Switch

Control

Assembly)

The Level Comparator (UIA and U1B) and Decoder (U3A, U3B, and U3C) decode a three level input

(through the rear-panel FREQ OFFSET

INPUT

connector) into binary levels that control the

RF

switches

(see SS1 and SS2). The AND gates (U2) are simply open-collector inverters,'which drive the transistors

(42,

43,

44, QS) to switch on and energize the solenoids of the RF switches. Table

9

summarizes the

decoding

.

The power supplies used are:

m

The unregulated +26V supplies drive current to the RF switch solenoids, and

is

the input to the

+

12V Regulator.

8

The regulated

+

12V

is

the only adjustable supply. It

is

the current input to the

+SV

Regulator as

well as the reference from which both the Level comparator references are derived, and the RF

Amplifiers are powered.

e

The regulated +SV supplies current to most logic devices.

Either the

+26

or +12V supply can trigger the Over-Voltage Protection should the respective voltage

exceed +42 or

+

12V. LED DS

1

gives an indication that the supply is nominally operational.

24

Model

11793A

34.

Troubleshooting

Microwave Converter

Primary

AC

power is present within instrument when line voltage

power cord is connected to the instrument.

Maintenance described herein is performed with power supplied to

the instrument and with protective covers removed. Such maintenance

should be performed only by service-trained personnel who are aware

of the hazards involved.

Use the correct torque wrench when installing sub -miniature

connectors.

Do

not

exceed the following torque settings for this instrument:

1.5

N.m for the

3

mm

(TlO) screws

2.0

N.m

for the

4

mm

(T15) screws

0.7

N.m

(6.3

in.lb) for

SMA

connectors

0.7

N’m

(6.3

in.lb) for Type-N connectors

General

Troubleshooting information is broken down into three categories:

0

RF

devices,

control devices, and

0

power supplies.

Either a compatible measuring instrument or a power supply connected to the

FREQ OFFSET

INPUT,

can

be used to control the

RF

switches. If a power supply is used, set it to

0,

+3,

or

+S

Vdc as dictated by Table

9.

2s

Microwave Converter Model

1

1793A

RF

Devices (Service Sheets

1

and

2)

Because of the diversity

of

test equipment and techniques available

for

troubleshooting the

high-frequency devices, no specific procedures are given. Check the performance parameters of the

RF

devices against the following table, Table

10.

Also check connectors and cables.

Table

10.

Performance Parameters

Device

AT1

3 dB

Attenuator

FL1

Low-Pass

Filter

s1,

s2

Switch

u1

LO

Amplifier

Performance Parameters

to

Check

Attenuation:

2.5

to 3.5 dB at 18

GHz

2.0

to

4.0

dB at

26.5

GHz

SWR:

4.251

at

26.5

GHz

~~ ~~

3 dB Corner:

900

to

1100

MHz

Passband Insertion Loss:

<0.25

dB at

800

MHz

Insertion Loss:

4.5

dB at

26.5

GHz

SWR:

<2.0:1

at

26.5

GHz

Frequency Range:

18

to

26.5

GHz

Gain:

>11

dB

SWR:

C2.51

u2

IF

Amplifier

u3

Mixer

Frequency Range:

10

to

700

MHz

Gain: 14 dB

SWR:

<1.8:1

LO Frequency Range:

2

to

26.5

GHz

RF

Frequency Range: 1.3 to

26.5

GHz

LO Power:

>+8

dBm

Conversion Loss:

<lo

dB

SWR:

<4:1

Control Devices (Service Sheet

3)

Set a power supply to

0

Vdc and connect it to the FREQ OFFSET INPUT connector. Set the supply to

0,

+3,

and

+S

Vdc respectively, and compare the logic levels

of

the logic devices with those listed in Table

9.

When specifically checking the drive transistors 42, Q3,Q4, or QS, note the following:

The switch solenoids automatically disconnect after completion of switching. Therefore,

it

is difficult to

distinguish between a drive transistor that

is

on but not drawing current, or one that is off and not

drawing current. The collector voltages will differ by only a few

mV.

If any of the transistors are known

to be working, compare the on and

off

voltages of the suspected transistor against those of a known

good

one.

Power Supplies (Service Sheet

3)

Check the points indicated in the schematic diagram for dc level and ac ripple. Note that the

+SV

Regulator is dependent on the

+

12V Regulator.

26

Model

11793A

Microwave Converter

Equipment

Refer to Table

4,

Recommended Test Equipment.

35.

Repair

Cleanliness

Do not handle the A1 Switch Control Assembly ,,oard more than necessary.

If

dirt or moisture from the

hands comes in contact with the circuit side of the A1 board, the circuits may become inoperative.

Do

not

use solder flux remover on the circuit board.

36.

Cleaning the Control-Line Switch Contacts

These instructions pertain to switches

S1

(in instruments with the

LO

amplifier option), and/or

S2

(standard and

LO

amplifier option configuration) located within the

RF

module. See Figure

9,

Switch

Contact Location.

TERMINAL

1

SPRING CONTACT

\

TERMINAL C

SWITCH.

CONTACT

CR2

TERMINAL

2

\

SPRING CONTACT

/

Figure

9.

Switch Contact Location

1.

Remove the switch from the

RF

module. Refer to Paragraphs

39

or

40,

RF

Module disassembly

procedures.

2.

Remove the two screws on the switch cover and remove the cover.

3.

Saturate the edge of a sheet

of

durable paper with alcohol.

27

Microwave Converter Model 11793A

4. Insert the paper under one of the contacts, and while pressing gently on the contact, slide the

paper through.

Do

not allow the alcohol to run inside the switch assembly.

Do

not

allow the paper

to shred.

Do this several times and repeat for the other switch contact.

5.

Saturate the edge

of

another sheet of paper with a freon-type degreaser and repeat step

4.

6.

Remove any shreds of paper that may have lodged in the contacts.

7. Reinstall the switch cover. Note the orientation of the feedthrough terminals on the cover with

respect to the switch contacts.

8. Replace the switch according to Paragraphs

4

1 or 42, RF Module assembly procedures.

37.

Instrument Disassembly Procedure

The 11793A Microwave Converter uses metric connecting hardware in the form of

3

mm (T10) and 4

mm (TlS) Torxhead screws (except for two small English thread Pozidriv screws mounting U1 to MP17).

Use the Torxhead size T 1

0

and T 1

5

bits that are provided, to disassemble and re-assemble the instrument.

The recommended torque wrench for use with the Torxhead bits

may

be

ordered as

HP

part number

8 7 3

0-00

12.

The major component blocks of the 11793A Microwave Converter are MP14 (RF Signal Processing

Module), A1 (A1 Switch Control Assembly), and T1 (Power Transformer). The

RF

module and the A1

assembly are mounted on MP13 (the Main Deck). The power transformer is mounted on MP2, the

instrument chassis left side strut. See Figures

6,

7,

and

8

to locate and identify parts and assemblies.

Note that Option 020 and 021 instruments differ from the standard and other option models

in

that the

main deck and transformer locations inside the instrument are reversed when compared to the standard

and other option models as shown in Figures 7 and

8.

In Option 020 and 021 models, the RF module

is

in

the rear of the instrument), and the transformer is mounted in the front left corner.

The following procedures allow the removal of the Microwave Converter components from within the

instrument chassis.

1.

Remove the top and bottom covers by loosening the screw in the middle of each cover rear edge.

These are captive screws and will cause the cover to push away from the front frame. Slide each

cover toward rear of the instrument to disengage, then lift up and away from the instrument.

2. Remove the side covers in the same manner as that of the top and bottom covers.

3.

Remove the plastic trim from the top of the front frame by inserting a screwdriver into the rear

slots and gently prying up the strip.

4.

Disconnect

J8

on the rear panel by removing the

9/16

inch retaining nut and lock washer.

5.

Instruments with serial number prefix 2S20A have MP8 (back panel) riveted to MP3 (rear

frame). To remove the rear frame, unscrew the four corner screws that connect MP2 (side struts)

to MP3. Pull off the two wires

05

and

0

(black/green and black) on the LINE VOLTAGE switch

(both wires are

of

the quick disconnect type).

For instruments with serial number prefix 2407A, remove MP8 (back panel) from MP3 (rear

frame) by unscrewing eight screws. Pull off the two wires

OS

and

0

(black/green and black) on

the LINE VOLTAGE switch (both wires are of the quick disconnect type).

28

Model 11793A Microwave Converter

6. Turn the instrument around

so

that the front of the instrument faces to the operator's left.

Desolder the 6, 5, 4, and

0

(blue, green, yellow, and black) wires from the A1 assembly.

7.

To

remove

T1

power transformer and its mounting bracket, unscrew the four screws located on

MP20 (mounting bracket). Separate transformer and the mounting bracket

by

removing the four

long screws passing through the transformer case.

8.

To remove the A1 assembly disconnect W12 (gray ribbon cable) at AlJl board connector,

unscrew the two screws at the VR3 heat sink, and turn the three board mounting stand-offs a

1/4 turn counterclockwise.

9.

To

remove MP 13 (main deck) and MP

14

(RF

module), remove the six Torxhead screws located on

the top and bottom of MPl (front frame). Remove the

six

screws connecting MP2 (side struts) to

MP13 (main deck). While supporting MP9, MPlO (front- and sub-panel) in one hand, carefully

slide MP13 (main deck) forward through the front frame opening just enough to reach the inside

cable connections.

Be careful that

you

do not bend the coax cables. Possible attenuation

or

interference

of

the

RF

signal may result.

a. When inside connections can be reached, use a 5/16 open-end wrench to disconnect the

semi-rigid coaxial cables from the front -panel connectors.

b. Carefully set aside the front panel and slide the main deck assembly out

of

the instrument

chassis.

To

remove the main deck on Options 020 and 021, disconnect the input cable connectors at the

back panel. Remove the main deck screws, then lift one side of the Main deck up until it clears

the side strut.

10.

To

remove MP14

(RF

module) from MP13 (main deck), remove the four screws that hold the

module to the main deck.

38.

Instrument

Assembly

Procedure

Note that Option 020 and 021 instruments differ from the standard and other option models in that the

main deck and transformer locations inside the instrument are reversed, when compared to the standard

and other option models as shown in Figures 7 and

8.

In Option

020

and 021 models, the RF module is in

the rear of the instrument), and the transformer is mounted in the front left corner.

Use the correct torque wrench when installing

sub

-miniature

connectors.

Do

not exceed the following torque settings

for

this instrument:

1.5

N'm

for

the

3

mm

(T

IO)

screws,

2.0

N.m

for the

4

mm

(TIS)

screws.

29

Microwave Converter Model 11793A

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

30

Place the RF Module upside down with the semi-rigid coax cables pointing to the left. Position

the main deck over the module with the four holes in the deck aligning with the four screw

holes in the module base. (The A1 assembly mounting stand-offs on MP13 (main deck) should be

upside down and on the opposite side of

MP

13 from the assembler.) Attach with four screws.

Take the main deck assembly (coax cables facing to the left) and slide into the main chassis

through the front frame (the two notches indicate the bottom edge and should be down). When

the coax cables are within two inches of the front frame edge, carefully connect the semi-rigid

coax cables to their respective front-panel connectors, using

a

S/16

inch open-end wrench.

For Option 020 and 021 instruments, main deck reassembly is just the opposite of disassembly.

Be careful that

you

do

not

bend the coax cables. Possible attenuation

or interference

of

the

RF

signal may result.

Carefully slide the main deck assembly into the instrument chassis until the front panel is within

the front frame and the mounting holes are aligned. Attach the front panel with the

six

Torxhead screws: 3 top,

3

bottom.

Attach the main deck assembly to the side struts using the

six

screws: three screws to a side.

Turn the instrument over. With the three A1 assembly mounting stand-offs on the main deck

(MP13) adjacent to the assembler, mount the A1 assembly to the main deck assembly. The three

large holes in the A1 assembly must align with the three mounting stand-offs, and the heat sink

holes must align with the deck mounting holes. Firmly seat the A1 assembly on the mounting

stand-offs and lock the stand-offs by turning the screw heads a

1/4

turn clockwise.

Fasten the transistor heat sink to the deck with two screws.

Connect W12 to AlJ1.

Mount transformer to the mounting bracket using the four long transformer screws. Mount the

bracket to the left side strut at the third and eighth holes (counting forward from the rear

frame) with four screws. Make sure that the transformer secondary wires (4,

5,

6)

face the corner

of

the A1 Switch Control Assembly.

Replace rear frame assembly to the side struts by connecting with four screws at the frame

corners. On instruments with serial number prefix 2407A, mount the rear panel to the rear

frame using eight screws. Ensure that the panel is aligned

so

that the electrical hardware is in

the same corner as the transformer.

Connect the black/green primary wire

(05)

on the transformer to the bottom right LINE

VOLTAGE lug (underneath the white/brown/gray wire

(9

1

81).

Connect the black primary wire

(0)

to the upper right LINE VOLTAGE lug.

Solder the colored secondary wires from the transformer to their respective solder pads on the

A1 Assembly: yellow to 4, green to

5:

and blue to

6.

Solder the black wire to the GND pad.

Reconnect

J8

(on

W

1

Sj

to the rear panel (in the

FREQ

OFFSET INPUT opening) using the

9/

16

inch lock washer and nut.

Model 11793A Microwave Converter

13. Replace the side panels by centering each panel in the track formed by the side strut edges. Slide

the panel from the rear forward until the captive screw on the rear edge of the panel

is

in

contact with the rear frame. The screw should be in position to be tightened into the frame. The

panel will move forward into place as the screw is tightened.

14. Replace the top cover by placing the cover onto the upper frame of instrument, then slide cover

toward front of instrument. Tighten screw in middle of rear edge of cover while applying a

slight upward pressure on the leading edge (to keep the edge from jamming on front frame).

Guide cover into slot in the top of the front frame. Turn instrument over and repeat for the

bottom cover.

39.

RF

Module Disassembly Procedure for Std, Option

010,

&

020

Instruments

1.

2.

3.

4.

5.

6.

7.

8.

9.

NOTE

When referring to switch ports: port

#I

is

the

far

left

(SMA)

connector, port

#2

is

the second

SMA

connector, etc., when holding

the switch (label

up)

with the

SMA

connectors facing

you.

Disconnect

W

I

2

(gray ribbon cable) at

A

1

J1.

Remove module cover (MP

16)

by removing the ten cover screws.

Disconnect cables

W7

and

W8

using a

5/16

open-end wrench:

W7

from U3 Mixer and FL1

Filter, W8 from U2 IF Amp and

S2

Switch, port #4.

Unsolder orange wire from

U2.

Remove

U2

and FL1 from MP16 by removing the two screws securing

U2,

then loosening the

filter clamp screw, and sliding the assembly out.

Disconnect the

LO

input semi-rigid coax cable

(W

1

in Standard instruments,

W

19

in Option

0

10

instruments, or W17 in Option

020

instruments) at U3, being careful not to bend, crimp, or kink

the cable. The radio frequency interference (RFI) shielding grommet can be removed by slipping

the grommet off of the cable via the cable access slit.

Repeat step

6

for

W2

(RF/IF Output) at

S2

port #3.

Repeat step

6

for W3 (RF Input) at

S2

port #2.

Unscrew the two Torxhead screws that secure the MP18 mixer mounting bracket to the MP14

module base.

NOTE

Remember the order in which the stiffener bar and mixer bracket are

assembled. The stiffener

bar

and

mixer bracket assembly order is

different between each brand of mixer used.

10. Disconnect

U3

Mixer from

AT1

Attenuator.

U3

Mixer and bracket can then be disassembled.

11. Disconnect

AT1

from S2.

31

Microwave Converter Model 11793A

12.

13.

14.

Remove

S2

from MP14 module base by removing the two corner screws.

Unsolder the three control wires

(1,

2,

5)

from S2.

Remove the Spira Shield (RF "EMI" gasket situated in the module base lip) only if damaged, or

replacement

of

MP14 module base.

40.

RF

Module Disassembly Procedure

for

Option

001,

011,

&

021

Instruments

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

NOTE

When referring to switch ports: port

#I

is the far left (SMA)

connector, port

#2

is the second

SMA

connector, etc., when holding

the switch (label

up)

with the SMA connectors facing

you.

Disconnect W

1

2 (gray ribbon cable) at A 1

J

1.

Remove MP16 module cover by removing the 10 cover screws.

Disconnect cables W7 and W8 using

a

5/16

open-end wrench: W7 from

U3

mixer and FL1

Filter, W8 from

U2

IF Amp and S2 Switch, port #4.

Unsolder the orange and white/orange wires (3, 93) from U2. Unsolder the gray and

white/orange wires

(8,

9

3)

from

U

1.

Remove U2 and FL1 from MP16 by removing the two screws securing U2, then loosen the filter

clamp screw and slide the assembly

out.

Disconnect W9 from S1, port #1 and U1.

Disconnect the

LO

input semi-rigid coax cable (W4 in Option

001;

W14 in Option 01

1;

or

W18

in Option 021) from S1, port #2, being careful not to bend, crimp, or kink the cable. The radio

frequency interference

(RFI)

shielding grommet can be removed by slipping the grommet off of

the cable via the cable access slit.

Disconnect W6 from S1, port #3 and

U3.

Disconnect W5 from Sl, port #4 and U1 (power terminal side).

Unscrew the two Torxhead screws that secure the UlMP17 Amplifier mounting bracket to

MP

14 module base. The

U

1

amplifier and bracket can then be removed.

Unscrew the two Torxhead screws that secure the MP18 mixer mounting bracket to MP14

module base.

NOTE

Remember the order in which the stiffener bar and mixer bracket are

assembled. The stiffener bar and mixer bracket assembly

order

is

different between each brand

of

mixer used.

12. Disconnect

U3

from the Attenuator (AT

1).

U3 Mixer and bracket can then be disassembled.

32

Model 11793A Microwave Converter

13. Disconnect

W2

from

S2,

port #3, being careful not to bend, crimp, or kink the cable.

14.

15.

Disconnect

W3

from

S2,

port

#2,

being careful not to bend, Lrimp, or kink the cable.

Disconnect AT1 from

S2,

port

#l.

16.

Remove switches S1 and

S2

from MP14 module base by removing the two screws that secure

each switch.

Unsolder the control wires on each switch

(6,

4,

&

92

on

SI;

5,

1,

&

2

on

S2).

17.

18. Remove the Spira Shield

(RF

gasket situated in the module base lip) only

if

damaged, or

necessary for

MP

14

module base replacement.

41.

RF

Module

Assembly

Procedure

for

Std, Option

010,

&

020

Instruments

1.

2.

3.

4.

5.

6.

Spira Shield (RF gasket) replacement:

Spira Shield

is

inserted into a groove

in

the module base

(MP

14). Within the groove at spaced

intervals, are a series of rectangular protrusions called bosses. Insertion and seaming should begin

and finish at

a

boss.

a. Use finger protection (such as a rubber finger protector) when working with the Spira Shield.

b.

Start at a boss on a straight section of the groove. Push the shielding into the groove using a

protected finger. Guide and twist the shielding to the next boss with the other hand.

c. At the next boss twist the shielding into a tight curl, guide it through the groove, then allow

the shielding to expand to hold itself in place.

d. When an opening in the outer wall

of

the module

is

encountered, the shielding should be cut

diagonally. Begin the threading procedure on the other side of the opening.

e. Twist the shielding tighter when rounding corners.

Solder the three control wires to the

S2

terminals

as

follows: green to

1,

brown to

2,

and red to

C(+).

With the cable slots of the module facing towards the assembler, mount

S2

(label up and the

ports pointing to the center of the module) in the left hand side

of

the module base.

Connect AT

1

to port

#

1

of

S2.

Connect

U3

to the mixer bracket, ensuring that the mixer side port (which connects to the

IF

output) faces opposite to the bracket mounting holes.

Connect U3 to AT1, but do not tighten.

NOTE

Mixer construction varies with manufacturer, and thus, is assembled

within

the

RF

Module differently.

For

example, a Norsal mixer has a

sfiffener bar placed between the mixer mounting bracket and the base

mounting castings. An

RHG

mixer has

a

stiffener bar placed above

the mixer mounting bracket.

33

Microwave Converter Model 1 1 79 3A

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

Attach the mixer assembly to the module base, but do not tighten the screws.

Tighten the connection to AT 1, then tighten the Mixer assembly screws.

Connect W

1

(in Standard instruments), W

19

(in Option 01

0

instruments), or W 17 (in Option 020

instruments) to the right port of the mixer (cable slots in module should be facing assembler).

Ensure that the radio frequency interference (RFI) shielding grommet cradles the cable in the

slot with the cable access slit facing to the side.

Connect W2 to S2, port #3. Ensure that the RFI Grommet

is

in place as above in step 9.

Repeat step 10 for W3 to S2, port #2.

Attach U2

to

the module cover.

Solder the orange wire to the U2 amplifier terminal.

Place filter clamp around FL1 and attach loosely to the cover.

Connect FL

1

to

U2.

Tighten FL

1

clamp.

Connect W7 to U3 and FL1.

Connect W8 to U2 and S2, port #4.

Secure module cover to base. Snug the screws down finger tight, then tighten the screws, working

from the center out.

Connect W12 to AlJ1.

42.

RF

Module Assembly Procedure for Option

001,

011,

&

021

Instruments

1.

2.

3.

4.

5.

6.

For Spira Shield (RF gasket) replacement, refer to step 1 under Paragraph 41 above.

Wrap and solder the control wires to the S1 and S2 terminals as follows: blue to

SI

terminal

1,

yellow to

S

1 terminal

2,

white/red to

S

1

terminal C(+);

green to S2 terminal

1,

brown to S2 terminal 2, orange, white/red to S2 terminal C(+).

With the cable slots of

MP

14 RF module facing towards the assembler, mount

S

1

(label up and

the ports pointing to the center of the module) in the right side of the module base; mount S2 in

the left side of the module base. Secure the switches with the four long Torxhead screws.

Connect AT1 to S2, port

#I.

Connect

U3

to the mixer bracket, ensuring that the mixer side port (which connects

to

the IF

output) faces opposite to the bracket mounting holes.

Connect U3 to

ATI,

but do not tighten.

34

Model

11793A

Microwave Converter

NOTE

Mixer construction varies with manufacturer, and thus,

is

assembled

within the

RF

Module differently. For example, a Norsa2 mixer has a

stiffener bar placed between the mixer mounting bracket and the base

mounting castings. An

RHG

mixer has a stiffener bar placed above

the mixer mounting bracket.

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

2

0.

21.

22.

23.

2

4.

Attach the mixer assembly to the module base, but do not tighten the screws.

Tighten the connection to

AT1,

then tighten the mixer assembly screws.

Assemble

U1

HF LO

Amplifier and the

UlMP17

Mounting Bracket. Ensure that the

U1

power

terminal labels are up, and that the terminals face towards switch

S2.

Attach and secure

U

1

Amplifier assembly to

MP

1

4

module base.

Connect

W3

to

S2,

port

#2

(cable slots in module should be facing assembler). Insure that the

radio frequency interference

(RFI)

shielding grommet cradles the cable in the slot with the cable

access slit facing to the side.

Connect

W2

to

S2,

port

#3.

Ensure that the

RFI

Grommet

is

in place as described in step 11.

Connect

W

5

to the left port of

U1

Amplifier and to S1, port

#4.

Connect

W6

to the right port of

U3

mixer and to

S1,

port

#3.

Connect the

LO

input semi-rigid coax cable

(W4

in Option

001

instruments;

W

14

in Option

01

1

instruments; or

W18

in Option 021 instruments) to

S1,

port

#2.

Insure that the

RF

grommet

is

in

place as described in steps

11.

Connect

W9

to the right port of

U1

and to S1, port #l.

Attach

U2

to

MPl6

module cover.

Solder both the orange and white/orange wires

(3,

93)

to the

U2

amplifier terminal.

Place filter clamp around

FL1

and attach loosely to the cover.

Connect

FL

1

to

U2.

Tighten

FL

I

clamp.

Connect

W7

to

U3

and

FL1.

Connect

W

8

to

U2

and

S2,

port

#4.

Secure module cover to base. Snug the screws down finger tight, then tighten the screws,

working from the center out.

Connect

W12

to AlJ1.

35

MICROWAVE SIGNAL DOWN-CONVERSION

L

El

INPUT

I

CONTROL ASSEMBLY

I

--1

--

r--

I

1

I I

I

"_.

'I

I

-

I

UNREGULATED

t12v

t26V

FULL WAVE

RECTIFIER

POWER

TRANSFCRHER

t12v

REGULATOR

0

-

t5v

I

t5v

REGULATOR

--

BD

1

Figure

10.

MICROWAVE CONVERTER

Simplified

Block

Diagram

37/30

(NOTE

11

i26V

TO

SWITCHES

SIGNAL OIRECT PATH

SIGNAL OOHN CONVERT PATH

t12V TO AMPLIFIERS

J9

!!!?'_?

JiO

w10

10

>-

5

'(7t

7

>i

,

A1

SWITCH

CONTROL

NC

'(

9t

NC

1

NOTES

1.

ALL CIRCUITRY EXCEPT

W12

IS

ENCASE0 IN A R.F.I.

SHIELDED MOOULE.

2.

J9

AN0

JlO

ARE

PART

OF Y12 AN0

Hi0

RESPECTIVELY. AN0 CANNOT

BE OROEREO SEPARATELY.

3.

J?

010

ONLY1

I

[NOTE

31

L_--d

(OPTION 020

ONLY1

[LEFT SIOEI

J?

ISTO

ONLYl

I

(NOTE

3)

4.

SEE FIGURE

7

FOR HELP IN COMPONENT

LOCATION AND IOENTIFICATION.

(RIGHT

SIDE1

J?

I

IOPTION

010

ONLY1

I

.---..

JB

L___>

lOPfION

020

ONLY1

INPUT SIQNAL DOWN CONVERTER

I

Ill

I.+

S2

RF INPUT SWITCH

EO0

MHz U2 IF 15dE

U3 MIXER AMPLIFIER

AT1 368

ATTENUATOR

(STD

AND OPTION

I

010

ONLYl

I

(NOTE

31

ss

1

Figure

11.

INPUT SIQNAL DOWN CONVERTER

Option

010,

and Option

0201

(Schematic Diagram

for

Standard

39/40

(NOTE

11

INPUT

SIGNAL

DOWN

CONVERTER

t26 VOC

TO

SUITCHES

I

SIGNAL DIRECT PATH

I

SIGNAL DOWN CONVERT PATH

8

5>1

I

c23

S2

RF INPUT SWITCH

0

1 CI

(I

LO

AMP

OUT

PATH

LO AMPLIFIER IN PATH

GND

1-

T

NOTES

1.

ALL CIRCUITRY EXCEPT

W12

IS

ENCASE0 IN A R.F.I.

SHIELOING MODULE.

2

-9

bhO

,110

ARt

PAHT

CF

"12

b1D

111

2ESPFC'IVt.l. Ah0 CbhhOT

BE

OROEREO

SFPARA1i.l

3.

INPUT VOLTAGE TO

LO

AMPLIFIER

CANNOT EXCEED

t51

(0.6V)

OF

t12

VdC

SUPPLY.

LO AMP OPT

001

011 021

5.

SEE FIGURE

0

FOR

HELP IN COMPONENT

LOCATION AND IDENTIFICATION

I

ONLY)

I

(OPTION

021

ONLYI

I

K2

T

I

'I

-

BOO

HHz

I

=z

e-----

AT1

340

FLl

LOU

-

ATTENUATOR PASS

FILTER

IPTIONAL LO AMPLIFIER AND SWITCH

L---

CR1

AMPLIFIER

18-26

6H2 (NOTE

31

I

f-

IF

15d0

'L

I

FI

ER

D

(OPTIONS

001

I

AND

011

ONLYI

I

[NOTE

4)

ss2

Figure

12.

INPUT SIGNAL DOWN CONVERTER

(Schemetlc

Diagram

for

Options

001,

Ol1,and

021)

41

C

A T

H

0

E

1

-- --

--

NOTES

A1

SWITCH

CONTROL

ASSEMBLY

(11793-60001)

--

I--

01

TOP BOTTOM

VIEW VIEW

IANOOEI

VR3 VR3

TOP BOTTOM

VIEY VIEW

(j

3

(CASE1

VR4

TOP

VIEW

TO

RF

swci iES

2,3

ss3

~~~

Figure

14.

AI

SWITCH

CONTROL

ASSEMBLY,

Schematic

Diagram

43/44

REGIONAL SALES AND

SERVICE OFFICES

NORTH/CENTRAL AFRICA

Hewlett-Packard S.A.

7, Rue du Bois-du-Lan

CH-1217

MEYRIN

2, Switzerland

Tel: (022) 83 12 12

Telex: 27835 hpse

Cable: HEWPACKSA Geneve

ASIA

Hewlett-Packard Asia Ltd.

6th Floor, Sun Hung Kai Centre

30 Harbour Rd.

G.P.O. Box 795

HONG KONG

Tel: 5-832 3211

After

Jan.

1,

1984

47th Floor, China Resources Bldg.

26 Harbour Rd., Wanchai

HONG KONG

Telex: 66678 HEWPA HX

Cable: HEWPACK HONG KONG

CANADA

Hewlett-Packard (Canada) Ltd.

6877 Goreway Drive

MISSISSAUGA,

Ontario L4V 1 M8

Tel: (416) 678-9430

Telex: 61 0-492-4246

MEDITERRANEAN AND

MIDDLE EAST

Hewlett-Packard S.A.

Mediterranean and Middle East

Operations

Atrina Centre

32 Kifissias Ave.

Paradissos-Amarousion,

ATHENS

Greece

Tel: 682 88 11

Telex: 21-6588 HPAT GR

Cable: HEWPACKSA Athens

EASTERN EUROPE

Hewlett-Packard Ges.m.b.h.

Lieblgasse 1

P.O. Box 72

A-1222

VIENNA,

Austria

Tel: (222) 2365110

Telex:

1

3 4425 HEPA A

NORTHERN EUROPE

Hewlett-Packard S.A.

Uilenstede 475

P.O. Box 999

The Netherlands

Tel: 20 437771

N L-1180 AZ

AMSTELVEEN

SOUTH EAST EUROPE

Hewlett-Packard S.A.

7,

Rue du Bois-du-Lan

CH-1217

MEYRIN

2, Switzerland

Tel: (022) 83 12 12

Telex: 27835 hpse

Cable HEWPACKSA Geneve

OTHER EUROPE

Hewlett-Packard S.A.

P.O. Box

150, Rte du Nant-D’Avril

CH-1217

MEYRIN

2, Switzerland

Tel: (022) 83 8111

Telex: 22486 hpsa

Cable: HEWPACKSA Geneve

EASTERN USA

Hewlett-Packard Co.

4 Choke Cherry Road

ROCKVILLE,

MD 20850

Tel: (301) 258-2000

MIDWESTERN USA

Hewlett-Packard Co.

5201 Tollview Drive

ROLLING

MEADOWS,

IL 60008

Tel: (312) 255-9800

SOUTHERN USA

Hewlett-Packard Co.

2000 South Park Place

P.O. Box 105005

ATLANTA,

GA 30348

Tel: (404) 955-1500

WESTERN USA

Hewlett-Packard Co.

3939 Lankershim Blvd.

P.O.

Box 3919

LOS ANGELES,

CA 91604

Tel: (213) 506-3700

OTHER INTERNATIONAL AREAS

Hewlett-Packard Co.

Intercontinental Headquarters

3495 Deer Creek Road

PAL0 ALTO,

CA 94304

Tel: (415) 857-1501

Telex: 034-8300

Cable: HEWPACK

Hp Tv Converter Box 11793A Users Manual

HP 11793A to the manual 24ba8577-721a-4983-b8cb-713b1efe97f2

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