Marconi Instruments 2040, 2041, 2042 Operating Manual

SIGNAL GENERATORS

2040 series

Operating Manual

This manual

applies

2040 10 kHz

1.35 GHz

to

2041 10 kHz to 2.7 GHz

2042 10 kHz to 5.4 GHz

Includes information on:

Option 001
Option 002
Option 003
Option 006
Option 008
Option 100
Option

to instruments with software issues of 5.003 and higher.

-

Second modulation oscillator

-

Pulse modulation

-

High output

-

Avionics

-

RF profiles and

-

Single fuse version

-

1 05

Modified pulse

power

modulation

complex sweep

No

any

including

storage or retrieval system, without permission in writing

by Marconi Instruments Ltd.

Marconi

©

part

this book may be reproduced or transmitted in

of

or by any means, electronic or mechanical,

fortn

photocopying, or

Instruments Ltd.

recorded

by

any

1

993

information

Preface

Ill

Operating precautions

Chapter 1 GENERAL INFORMATION

Chapter

Chapter

Chapter

Chapter

Chapter

2

INSTALLATION

3-1

OPERATION

3-2

GPIB OPERATION

4-1

BRIEF TECHNICAL DESCRIPTION

5-1

'ACCEPTANCE TESTING.....

. 54-A ^tCEPTANCE TESTING SECOND MODULATION

OSCILLATOR OPTION

. 5-1-B ACCEPTANCE TESTING PULSE

MODULATION

OPTION

. 5-1-C

ACCEPTANCE TESTING

HIGH OUTPUT POWER

iv

3-

1-1

4-

2-1

5-

3-1-1

2-2

1-1

1-1

5-1-A-l

5-1-B-l

5-1-C-l

Annex A-l

Annex B OPTION

Index

008 RF PROFILE

AND COMPLEX

SWEEP

Annex B-l

Index 1

WARNINGS, CAUTIONS and NOTES

These terms have

WARNINGS

CAUTIONS

Notes contain important

contain information to prevent personal injury.

contain information to prevent damage

HAZARD SYMBOLS

The meaning of hazard symbols appearing on the

Symbol

A

A

A

A

Nature of hazard

Dangerous voltage

Beryllium

Fire hazard

Lithium batteries are

Appropriate caution

when handling

specific meanings in this manual

general information.

used in this

should be exercised

these items.

to the equipment.

equipment is as follows:

Reference

Al. A-i-n

in manual

ratq&sri J

„

SAFETY

This

product has been designed and

safety requirements for

requirements for electronic measuring

electronic measuring apparatus' and 1EC Publication 348 'Safety

tested

apparatus'.

in accordance with BS4743 ’Specification

for

WARNING

-

ELECTRICAL HAZARDS

supply voltage. This equipment conforms with IEC Safety

AC

provided with

is

always be

connected to the source of supply via a socket with a

protective grounding lead. To maintain this

a

Be aware that the supply filter contains

equipment is disconnected from the

safety requirements, a

removal.

Removal of

risk of exposing high

with the supply on,

involved.

Fuses. Note

lead. If only one of

supply

For Option 1G0

the supply lead. If

fuse to

remain at

potential.

?

Fuses.

become

Note

transposed

supply potential even after the fuse has ruptured.

slight shock may be felt if the plug pins are touched

covers. Disconnect the supply before removing the

voltage parts. If any internal adjustment or servicing has to be carried out

it must only be performed by a skilled person

that there are supply fuses in both the live and

these fuses should rupture, certain parts of the equipment

single fuse version only:

that the internal supply fuse is in series

connection

is made to a

to the neutral conductor, in which

Class

protection the supply lead must

meaning that it

1,

grounded contact.

capacitors that may remain charged after the

supply. Although the stored energy is within the approved

immediately after

covers

so as to

avoid the

who is aware of the hazard

neutral wires of the supply

could remain at

with the live (brown) conductor of

2-pin unpolarized supply socket, it is possible

case, parts of the equipment could

for the

HAZARD

Make sure that

an integrally fused plug is used on the supply lead,

If

only fuses

commensurate with the with current requirements of this

Data' in Chapter 1 for power requirements.

CAUTION

-

PULSE INPUT

Before switching the instrument on,

PULSE INPUT

socket.

of

the

correct

rating and type are used

ensure

that

for replacement.

ensure that the fuse rating is

equipment. See under 'Performance

no signal voltage is present on the

WARNING

-

OTHER HAZARDS

Some

which

disposal

equipment.

Maintenance

give

Beryllia (beryllium

This material, if incorrectly

of the components used

off toxic fumes

of these items.

part of the Service Manual

A Lithium battery is

Lithium

crushed, incinerated

CAUTION

This equipment contains static

-

refer to the service manual

is a toxic substance.

-

STATIC SENSITIVE

in this equipment may include resins and

if incinerated.

oxide) is used in the

handled, could cause

for safe handling precautions.

Take appropriate precautions, therefore,

construction of some of the components

used in this equipment.

Therefore these items should in no

or disposed of in normal waste.

COMPONENTS

sensitive components which may

for handling precautions.

a danger to

health

damaged

be

other materials

in the

in this

-

refer

to the

circumstances

by

handlin:

be

CAUTION

When the

other instruments on

-

TILT FACILITY

instrument is in the tilt

top

of

it.

position, it is

inadvisable

for stability reasons,

to stack

46882-074C

Blank

Page

46882-074C

CONTENTS

INTRODUCTION

MAIN FEATURES

Operation

Display

Frequency selection

Output

Modulation

Incrementing

Sweep

Non-volatile memory

Programming

Protection

Spectral purity

Calibration

Options

PERFORMANCE DATA

LIST OF FIGURES

GENERAL

INFORMATION

PAGE

1-2

1-2

1-2

1-2

1-2

1-2

1-3

1-3

1-3

1-3

1-4

1-4
1-4

1-4
1-4

1-5

Fig.

1-1

Typical phase noise performance

2040 series

of

1-5

46882-074C

1-1

INTRODUCTION

The 2040 series of Signal Generators cover the frequency

three models:

kHz to

(10
of operation and ease of use. The output may be amplitude, phase,

pulse

5.4

modulation available

2040

GHz). A dot matrix

kHz to 1.35

(10

display

as an option. Modulation is

GHz), 2041 (10

with soft key

selected screen options allow flexibility

available using a combination of up to

two external signal inputs and a built-in LF source (a second internal

Microprocessor control

allows programming by the General Purpose Interface Bus

ensures

that

instruments are flexible and easy to use and

the

range 10 kHz

kHz to 2.7 GHz) and 2042

or frequency

source

(GPIB). The GPIB is designed

IEEE Standard 488.2 and is a means of sending commands to an instrument,

a remote controller or personal computer. The instruments can

part of a fully automated test system.

therefore be used manually or as

is

5.4 GHz with

to

modulated

optional).

via

a data bus, from

with

MAIN FEATURES

Operation

Selection

soft keys or the rotary knob. Hard keys have single or dual

throughout, whereas soft

of parameters on the

have functions dependent on the present mode of operation.

keys

Parameters may be set to specific values by numeric key entry,

steps of any size using the n/JJ- keys or altered by moving the knob, set to a particular sensitivity.

The SIG GEN, LF, SWEEP, MEM (memory),

selectable, at any point

soft

key functions are indicated by

the display

of

panel.

operation, via the

of

screen

involve one or more of the numeric, hard or

may

functions which

remain

constant

while values may be varied in

A (delta) and UTIL (utility) menus are

below the display panel.

keys

labels which appear alongside the keys situated at either side

Within

the display, the

to

Display

The display is

modulation and RF

features

with

lighting conditions may be accommodated using the backlight

11

-digit resolution for carrier frequency, 4-digit for RF

unit annunciators.

Contrast may be varied, using the control knob, to optimize the

a dot

level

matrix liquid

shown

are

crystal

in horizontal regions on

panel,

no backlight to full intensity. A full graphical display test is available, refer to the

Manual.

with

backlighting. Carrier frequency,

the principal screen. The display

level

and 3-digit for modulation,

viewing

intensity function, variable from

angle. Differing

Service

Frequency selection

Carrier frequency is selected

entry via the keyboard. Alternatively, selection may be made via the General Purpose Interface

Bus (GPIB). Frequency resolution is

a non-volatile memory with complete recall when required. An ON-OFF key is provided to

completely

disable the output.

via

the soft key

0.1

Hz across the

option on the SIG GEN display and direct

band. Carrier frequencies can be stored in

Output

RF

output up to

or better over the entire range. A high output option is

calibrated level

to

+13 dBm can be

set by

direct keyboard entry with a resolution of 0.1 dB

+19 dBm on the 2040 instrument.

available to extend the maximum

1-2

46882-074C

without

.

An

extended hysteresis facility allows for

introducing mechanical attenuator

extended electronic control of RF output level

transients when testing squelch systems.

A low intermodulation

improves

intermodulation

the

A choice of calibration units

simple conversion of units

held

calibrated value

generator. This facility can

ensure that

facility,

preventing

memory

in

and may be altered from

The output level

may be used to compensate for

all generators in an area give identical

the principal calibration of the generator

An electronic

damage to output circuits when RF or DC

trip protects the generator output against reverse

mode can be selected which disables the RF levelling

performance when

available

is

(for example, dBm to jiV). Calibration

can be offset by up to ±2 dB by keyboard entry. Offsets

be used as a means of deliberately offsetting

Modulation

Comprehensive

pulse

oscillator is provided, having

0.1 Hz. A

inputs on the front panel allow external

signal(s). Therefore,

sources

modulation are provided for testing a wide

second modulation

may be combined to give the

'MODULATION MODES’,

amplitude, frequency (plus wide bandwidth

frequency

a

oscillator

a maximum of four modulation sources may

single, dual, composite and dual composite modes,

Chap.

3-1

combining

to the operator and provision is made

the front panel or over the interface bus.

cable or switching losses external

the

outputs of

data

two

signal generators.

for

the output level is

the output level to

measurements. While using the offsetting

is not lost and may be returned

power of up to 50 W,

power is accidently applied.

FM), phase and optional

range of receivers. An internal modulation

range of 0. 1 Hz to 500 kHz, with

can be included

modulation signals to be mixed with

as an option. Two independent BNC

available

be

at one time. These

system and

for the

from the

to

to at any time.

a resolution of

internal

the

the

see

The signalling facility allows testing

tone capability.

modulation

display.

modes. Sub-audible calling

The

sequential

Incrementing

All major parameters can

keyboard entry

1 kHz for earner frequency,

deviation,

In addition the rotary

knob being changed

or the GPIB. If no step size

1

for

%

AM depth and 1 dB for output level.

by means of the

Sweep

The sweep

parameters

specified by the user, with

the function.

allowing the placement of up

are used to specify sweep; start, stop,

capability of the 2040 series allows comprehensive

The sweep markers menu is available

of radio equipment with sequential and sub-audible

calling tone system

tones are specified

be incremented or decremented in step

is entered for a parameter, the steps are preset to

1 kHz for modulation oscillator and LF frequency, 1

control can be used to vary the parameter with the sensitivity

and

-*-10

xlO

accessible

is

keys.

from

within

the

utility menu for all four

the modulation source select

sizes entered

kHz for FM

testing of systems. Four

number of steps and time per step. These

upper and

five user

to

lower

limits for the parameter values

defined markers.

being dependent on

by soft key selection on the sweep display,

via

of the

are

Non-volatile

memory

The non-volatile memory allows

carrier frequency

later

use at any time.

46882-074C

settings, 20 sweep settings and 20 signalling

50 complete instrument settings,

tone sequences to be stored for

50

partial

settings, 100

1-3

Programming

A GPIB interface is fitted so

designed to the IEEE Standard 488.2. The instrument

is

listener.

that all functions are controllable

Protection

prevent accidental interference with the contents

To

protected by a secure key sequence.

Two levels of protection are offered, appropriate to

most secure is

level of protection is less severe, enabling the

normal operation, such as

standard frequency.

reserved

for features

selecting the RF level calibration

Spectral purity

With an SSB phase noise

offset), the 2040 series can be used for both

measurements. Harmonically related

-90

dBc respectively.

Calibration

which alter the calibration data

user

performance of better than

signals and

via the interface bus

can function both as a

of internal memories,

the function being accessed.

of the instrument. The first

access functions which are

to

units, RF level offsets and external

talker and

internal

-140dBc/Hz at 1 GHz

in-channel and adjacent channel

which

data is

relevant

(20

receiver

The

to

kHz

non-harmonics are better than -30dBc and

a

The 2040 series has a two

electronically controlled adjustment. TTiere are no

to affect the calibration. The

calibration display

year calibration interval and is

menu.

Options

following factory-fitted options are available:

The

-

Option 001

An additional modulation oscillator is

oscillator has the same

modes.

Option 002

The pulse modulation facility

fall times of less than 15 ns with an on/off

and

Option

This option extends the

Option 006

Second modulation oscillator

specification as the first and allows full

-

Pulse modulation

-

003

High output power

output level to +19 dBm on the

-

Avionics

available

allows radar RF and IF stages to be

ration of better than 70 dB.

calibrated entirely by

internal mechanically adjustable

available

is

via

enable greater

to

key selection at the utilities

soft

flexibility. This second

use of complex modulation

tested and features rise

2040 model.

components

Provides internally generated

Instrument Landing systems

1-4

(ILS) and VHF Omni Range

modulation waveforms suitable for the

(VOR) beacons.

testing of

46882-074C

Option

008

-

RF profiles and complex

sweep

The RF profile

introduced

sweeps whose step size,

features are particularly

Option 100

Option 105

testing time

SSB Phase

Noise

(dBc/Hz)

by cables, amplifiers and

-

Single fuse

single

A

fuse is used in place

-

Modified

Modifies the pulse

domain duplex and time domain multiple

Carrier Frequency

facility provides

step time and RF level change while

useful for EMC, Tempest

compensation for frequency dependent level

signal combiners. The complex sweep

and ATE applications.

of the standard double fuse.

pulse modulation

modulator (Option

(MHz)

002)

Noise (dBc/Hz)

provide

to

access receivers.

SSB Phase

facility generates

the sweep is in progress. These

a slower rise and fall time

-90

-100

-110

-120

-130

-140

-150

-160

0.1 OJJ 1

3 10 30 100 300 1000 3000

Offset

(kHz)

errors

for

0000

1

1-1

Fig.

Typical phase noise

PERFORMANCE DATA

Carrier

frequency

Range

Selection

Indication

Resolution 0.

Accuracy As frequency

Phase incrementing

10 kHz

10 kHz to 2.7 GHz

10 kHz to 5.4

By keyboard

control.

1 1 digits with annunciators.

1 Hz.

The carrier

radians (approximately

to

1.35

performance

GHz

(2040);

2040 series

of

(2041);

GHz

(2042).

entry of data. Variation

standard.

phase can be advanced or retarded

1.4°)

using the rotary control.

by

llV-lj-

keys and by rotary

in steps of

7t/128

46882-074C

1-5

RF OUTPUT

Range

Selection

Indication

Resolution

-144

dBm

-144

dBm to +19 dBm

-144

dBm

above

40°C.

When AM is selected the maximum

with AM depth to +7 dBm

at maximum

Selectable

+13

to

to

overrange

+13

AM

dBm

dBm

depth.

(2040, 2041);

with Option

(2040

(2042),

derated over 4 GHz by 0.1 dB/°C

dBm for

(+13

mode allows

003);

output level reduces linearly

2040

with Option

uncalibrated output

003)

levels to

+19 dBm to be generated.

Selectable extended

control over an 24 dB range without the mechanical attenuator

operating.

hysterisis provides for uncalibrated

level

By keyboard entry of data. Variation by 1I7-11 keys and by rotary

control. Units may be pV,

ji

1

voltage units may be

1 mV EMF or PD; dBm. Conversion between dB and

V,

achieved

key (dB, or V, mV, pV).

4 digits with unit annunciators.

0.1 dB.

mV, V EMF or PD; dB

pressing the appropriate

by

relative

units

to

Overrange*

Extended electronic

setting range*

*

When

mode is enabled.

Accuracy

level

Adjustable
with Option

Non-interrupting level control range of 18 dB.

At 23 ±5

Output

>-127

-100

>

-50

>

>

Temperature

coefficient

(dB/°c)

up to typically

003).

°C ambient:

level

1.35

dBm

±0.85 dB ±1.0 dB

dBm ±0.85

dBm

=0

dBm ±0.50 dB ±0.7 dB ±1.0 dB

±0.85

+19 dBm (typically +25 dBm

Carrier frequency range

10

kHz

to

GHz

1.35 GHz

to

2.7 GHz

dB ±1.0 dB ±1.5 dB
dB ±1.0 dB ±1.5

±0.005 ±0.01 ±0.02

2.7

5.4

for 2040

GHz

to

GHz

-

dB

1-6

2040 with Option 003: ±1.2 dB for output levels greater than

-127

dBm.

46882-074C

VSWR

For

output levels less than 0 dBm:

Less than 1.25:1
Less than

Less than 1.5:1 to 5.4 GHz (return loss greater than

1.4:1 to 2.7 GHz. (return loss greater than 15.6 dB);

to 2.2

GHz

(return loss greater than 19.1 dB);

14 dB).

Output protection

Output connector

SPECTRAL

At RF levels

PURITY

+7

up to

dBm

Hannonics

Sub-harmonics Better

Non-harmonics

(offsets

3 kHz)

greater

than

An electronic trip protects the generator output against reverse

power of up to 50

50 Q normal, N-type female socket.

2040,

Better than

Better than
Better than

(2040

2042:

Better than

Better than
Better than

In low noise

In normal mode: Better than

2041:

with

than

-30

-27

-27

Option

-25

-90

-40

-30

mode 1: Better than

W

dBc for

from

a source

carrier frequencies to 1 GHz;

VSWR of

up to 5:1.

dBc for carrier frequencies to 2.7 GHz.

dBc for carrier frequencies

003).

dBc for

carrier frequencies to 5.4 GHz.

to 1.35 GHz;

dBc to 1 .35 GHz,

dBc to 2.3 GHz,
dBc

5.4 GHz.

to

better

to 2.7 GHz;

better than

and

5.4

GHz.

than

-70

dBc up to 21 .09375 MHz;

-90

dBc

from 21 .09375 MHz

-84

dBc from 2.7

-70

dBc

to

5.4

GHz.

to

!

Residual FM (FM off) Low

noise mode: Less than 0.3 Hz RMS deviation in

3.4 kHz unweighted bandwidth

Normal

3.4

kHz

SSB phase noise

Low noise mode 1: Less than

from a earner

Less than

frequency of 1

Normal

an offset of 20 kHz from

RF leakage

Less than

50 H load

case of the generator with the output terminated

load.

FM on

OM

AM Typically less than 100 Hz for

frequency of

on AM Typically less than

for

30% AM depth for modulation rates up to 10 kHz.

at 1 GHz.

mode: Less than 7 Hz RMS deviation in a

unweighted

frequency of 1 GHz;

-140

bandwidth

470 MHz.

at

-115

dBc/Hz at an offset

dBc/Hz

20 kHz

of

at an offset of 1 kHz

from a carrier

GHz.

mode: Less than

jiV PD generated

0.5

two

by a

turn 25 mm loop, 25 mm or more from the

-116

dBc/Hz (typically

a carrier frequency of

at the carrier frequency across a

-122

470

in a 50 Q. sealed

30% AM depth at a modulation

1 kHz and a carrier frequency of 500 MHz.

0.1 radians at a carrier frequency of 500 MHz

a 300 Hz

300

dBc/Hz) at

MHz.

Hz

to

to

46882-074C 1-7

MODULATION MODES Four modulation modes are

available:

Single FM, Wideband FM, OM, AM

Dual

Two

independent

channels of differing

with FM).

Composite

Two independent channels of the same

FM1 with FM2).

Dual composite A

FREQUENCY

Deviation

Deviation for

MODULATION

2040

series

in low noise mode is limited to:

combination of Dual and Composite

independent

AMI with AM2 and FM1

(e.g.

channels

Phase modulation can be used

simultaneously).

Peak deviation

to 21 .09375

deviation

Peak

21.09375

Carrier

from

MHz;

from 0 to

MHz.

frequency range

or pulse (optional).

with FM2).

instead of FM (but not

0 to 1 MHz

for carrier frequencies up

1% of carrier frequency

modulation type (e.g. AM

modulation type. (e.g.

modes providing four

above

Deviation limit

2.7 GHz~5.4 GHz

1.35 GHz

675 MHz

337.5 MHz

168.75 MHz -337.5 MHz

84.375

42.1875 MHz

21 .09375 MHz

below 21.09375 MHz

Selection By keyboard

control.

Indication

Displayed resolution

Accuracy

internal modulation

at

1 kHz

3 digits with annunciators.

1 Hz or 1 least significant

In low noise modes: ±6%

FM.

200.0 kHz

-2.7

GHz

-1.35

MHz

-

675 MHz

-

MHz

168.75 MHz

-

84.375 MHz 3.125 kHz

-

42.1875

entry of data. Variation by 1F/4J- keys

MHz 1 .0625 kHz

digit, whichever is greater.

of indication ±1 Hz excluding residual

100.0

50.0 kHz

25.0 kHz

12.5 kHz

6.25 kHz

6.25 kHz

kHz

and

by

rotary

In normal noise modes: ±5%

residual FM.

of indication ±10 Hz excluding

46882-074C

Accuracy

external modulation

at 1 kHz

In normal mode: ±5% of indication ±10 Hz excluding residual

FM.

With

ALC off, the modulation is calibrated for an input

V

1.0

PD RMS sine wave.

level

of

1 dB bandwidth

3 dB bandwidth

Carrier frequency offset

Distortion

Modulation

source

Group delay

In low

noise mode: ±6% of indication ±1 Hz excluding residual

FM.

DC

to 300 kHz (DC coupled).

10 Hz to 300 kHz (AC

Typically 500 kHz.

Bandwidth is limited

Typically greater than 1 MHz.

Capable of accepting

In DC FM mode less than

using DC FM nulling

Using external

modulation without ALC:

Less than 3% at maximum deviation for modulation frequencies

up to 20 kHz.

Less than 0.3% at

frequencies up to 20 kHz.

Internal LF generator

Less than ljis, 3 kHz

In low

noise mode less than

coupled).

to 100 kHz in low noise mode.

external sources

Hz + 0.1% of set deviation) after

±(1

facility.

of maximum deviation for modulation

10%

external via front panel sockets.

or

500 kHz.

to

{is, 3

3

of

kHz

signals.

FSK

to 250 kHz.

WIDEBAND

Deviation

Indication

Selection

Input level

Accuracy

3 dB bandwidth

Modulation source

Group Delay

FM

A rear panel input on a BNC connector allows an external

modulation

deviation

display the deviation equivalent

3 digits with annunciators.

By keyboard entry of

and the display

steps

to the requested value.

1 V RMS sine wave to achieve indicated deviation.

FM.

As

In normal noise
In low noise modes typically 250 kHz (DC or AC coupled).

External

Less than

signal to produce up to the

is controlled in 3 dB steps only and the generator will

to

The sensitivity is controlled

data.

will indicate the

mode typically 10 MHz (DC or AC coupled).

via

rear panel socket

{is, 3 kHz to 10 MHz.

0.5

(50

maximum deviation.

1 V RMS sine wave

value

deviation

of

Q impedance).

input.

in 3

nearest

The

dB

46882-074C

1-9

PHASE MODULATION

(Normal mode only)

Deviation 0 to 10 radians in 0.01 radian steps.

r

[

7

Selection By keyboard entry of data. Variation by

control.

Indication

Resolution 0.01 radians.

Accuracy

dB

3

bandwidth

Distortion Less than 3% at maximum deviation at 1 kHz modulation rate.

1 kHz Better than ±5% of indicated deviation excluding residual phase

at

digits with annunciators.

3

modulation.

100 Hz to 10 kHz.

IF/11

keys and by rotary

Modulation source Internal LF generator or external via front panel sockets.

AMPLITUDE MODULATION

For carrier

1 GHz (and for output levels

less than +13 dBm with

Option

Range 0

frequencies up to

003):

99.9% in 0.1% steps.

to

Selection

Indication

Depth accuracy

kHz ±4% of setting ±1%. Usable to

at 1

By keyboard

control.

digits with annunciator.

3

entry of data. Variation

Envelope distortion For a modulation rate of 1 kHz:

Less than 1% total harmonic

Modulation

External

External AM 1 dB

source Internal LF

AM accuracy With

bandwidth

Less than

ALC

1 .0 V PD RMS sine wave.

With modulation ALC off; DC to 30 kHz in DC coupled mode

and 10 Hz to 30 kHz in AC coupled mode. Typical modulation

total harmonic distortion for depths up to 80%.

3%

generator or external via front panel sockets.

off the modulation is calibrated for an input level of

bandwidth exceeds 50 kHz.

Modulation bandwidth is limited to 1.5 kHz in low noise mode 1.

MODULATION OSCILLATOR

Frequency range 0.1 Hz to 500 kHz (sine wave).

by IF/11

5.4

GHz.

distortion for depths

keys and by

up

to

rotary

30%.

Selection By keyboard entry of data. Variation by 11711 keys and by rotary

1-10

control.

46882-074C

Indication 7

digits with annunciators.

Resolution

Frequency accuracy As frequency

Distortion

Hz.

0.1

standard.

Less than 0.1% THD in sine wave mode at frequencies up

20 kHz.

Alternative

waveforms

A triangular wave is available

frequencies up

for

to 100 kHz.

A square wave is available for frequencies up to 2 kHz (requires

Option 006

Sweep

Signalling tones The modulation oscillator

to 16 tones) or sub-audible tones in accordance with ElA, ZVEI1,

ZVEI2,

standards. Facilities

user defined tone systems.

^Requires second modulation

-

Avionics or Option 008

fitted).

to be

DZVEI, CCIR, EURO

are also

can be used to generate sequential (up

available

oscillator (Option

-

RF Profiles

EEA, NATEL

1,

for creating and storing

001)

EXTERNAL Two independent inputs on the front panel with BNC

MODULATION

EXT MOD 1 and EXT MOD 2. The modulation is calibrated

with

nominal.

V

1

RMS

sine wave applied. Input impedance 100 kQ

to

and Complex

DTMF*

and

to be fitted.

connectors,

MODULATION ALC The

Level

LF

OUTPUT Front panel BNC connector.

range

Distortion

1 dB bandwidth Typically 10 Hz to 500 kHz.

EXT MOD 1

by an ALC

0.7 V

Less than 0.1% additional distortion for frequencies up to 20 kHz

at 1 V RMS

either LF Generator Mode to

system.

RMS to 1 .4

and

V

wave (typically

sine

modulation oscillator or in LF Monitor Mode to give

from the internal modulation signal paths.

Selection By keyboard

control.

Indication

Level

7 digits with unit annunciators for frequency and 4 digits with

unit annunciators for level.

LtV to 5 V RMS with a load impedance of greater than

100

entry of data. Variation by 1M keys and by rotary

600 a

1

V to 1 .4 V RMS with a load impedance of greater than

00

p

50 Q.

EXT MOD 2 INPUTS can each be

RMS sine wave.

less than 0.1% up to 50 kHz).

output may be

The

give

an output from the internal

configured in

levelled

an output

Common mode voltage ±0.5 V maximum.

Source impedance 5.6 0 nominal.

46882-074C

1-11

Level

accuracy at 1 kHz With a load impedance of greater than 10 kQ:~

±5% for

mV.

50

levels

above 50 mV

and ±10% for levels from

500

pV

to

Frequency

response

Typically

better than ±1 dB from

0.1 Hz

to 300

kHz.

SWEEP

Control modes Start/stop values of selected parameter;

Number of steps;

Time per step.

Step time 1 ms to 20 s per step.

Sweep ramp Synchronized analogue ramp with an amplitude of nominally 0 V

to 10 V peak on rear panel BNC connector.

or

level

a

to

provide an

switch

+5 V.

Markers 5 user selectable markers for frequency or

indication when specified parameter values have been reached.

Output 0 V to +5 V from 600 O on rear panel BNC socket.

Trigger Rear panel BNC connector. Applying 0 V

starts the sweep or steps the sweep from point to point. Socket is

internally

connected via

k£2 pull-up resistor

10

FREQUENCY STANDARD

Frequency 10 MHz.

}

closure

Temperature

Warm

up time Within 2 in 10

stability

Better than ±5 in

8

over

10

7

of final frequency within 10 minutes from switch

operating range of

the

to 50°C.

0

on at 20°C ambient.

Aging rate Better than 2 in 10

month continuous

7

per year; better than 5

use.

Output Rear panel BNC socket provides an output at frequencies of

level into

at

External

or 10 MHz with a nominal 2 V pk-pk

input Rear panel BNC socket accepts an input

minimum level of 2 V pk-pk. Maximum input

in

10

per

10

50

or

5

1,

level

day after 1

O.

MHz

10

V

5

with a

pk-pk.

1

,

GPIB INTERFACE A GPIB interface is fitted. All functions except the supply switch

are remotely programmable.

Capabilities Complies

RADIO

FREQUENCY

INTERFERENCE

with

488.1: SHI, AH1, T6, TE0, L4, LEO, SRI, RL1, PP0, DC1,

DTI, CO, E2.

Confirms to

EEC directive

RF interference.

the

following

76/889

subsets as

and VDE 0871

defined in

as to

IEEE Std.

limits

of

5

SAFETY Complies with IEC 348.

1-12

UL 1244 approved.

46882-074C

RATED RANGE OF USE

(Over which full specification

is

met).

viL.iYi.nnu u^i vrimn i iv/n

Temperature

Humidity

CONDITIONS OF

STORAGE AND

TRANSPORT

Temperature

Humidity

Altitude

POWER REQUIREMENTS

AC supply

CALIBRATION

INTERVAL

0 to

55°C.

Up to 93% at 40°C.

-40°C to +7 1°C.

4600

V.

400

relative

m

(15,000

Hz.

humidity at 40°C.

ft).

90-115

V,

105-132

V,

188-242

V and

Up to 93%

Up to

Four settings covering

216-265

45

Hz to

120 to 180 VA maximum dependant on version and options

fitted.

years.

2

DIMENSIONS AND

WEIGHT

SECOND MODULATION

OSCILLATOR OPTION

PULSE MODULATION

OPTION

Modulation modes

Rise time

Control

Maximum input level

(Over

Height

152 mm 425 mm 525 mm 21.0 kg

6.0 in 16.6 in 20.5 in

Specification

Pulse modulation may be used alone or in conjunction

<t>M or

For earner frequencies above 21.09375 MHz less than 15 ns

(typically 5 ns) from 10% to 90%.

For carrier frequencies below 21.09375 MHz less than 25 ns from

projections but excluding front panel handles).

Width Depth

Weight

461b

Modulation Oscillator.

as

Wideband

FM.

with

FM,

10% to 90%.

0 to + 1 V for carrier off, +3.5

+5.0 V.

to + 5

V

carrier

for

on.

ON/OFF ratio

46882-074C

Better than 70 dB at the earner frequency, typically exceeds 80

dB.

1-13

Additional level error

Propagation delay Typically 80 ns from PULSE INPUT to RF OUTPUT.

Input impedance 50 Q, nominal.

Switching speed Rise and fall times less than 25 ns from 10% to 90%.

than ±0.5 dB.

Less

Typically

Typically

ps with Option

5

with Option

ps

2

105

105

(DECT).

(DECT).

+19 dBm RF OUTPUT

LEVEL OPTION

2040

For

RF OUTPUT

model

only.

Range

-138

dBm to

When AM is selected the maximum output

with AM depth to +13 dBm at maximum AM depth.

SPECTRAL PURITY

At RF levels up to
+7 dBm:

Harmonics Better than

AVIONICS OPTION

See

Annex A.

-27

RF PROFILES AND

COMPLEX SWEEP See Annex B.

OPTION

+19 dBm.

level reduces linearly

dBc.

1-14

46882-074C

W

X

C

Y

VERSIONS,

When

Ordering

ordering please

numbers

2040

2041

2042

Option 001
Option 002
Option 003

Option 006
Option 008
Option 100
Option

43129-003

46882-074C

OPTIONS AND

quote the full ordering number information.

105

ACCESSORIES

Versions

10 kHz
10

kHz to 2.7 GHz Signal Generator.

10 kHz to 5.4 GHz Signal

Options

Second internal modulation

External

High output power (available

Avionics.

RF

profiles and complex sweep.

Single supply fuse.

Modified

Supplied Accessories

1.35

to

pulse modulation.

GHz Signal Generator.

pulse modulation.

Generator.

oscillator.

AC supply lead.

Operating manual for 2040

Optional Accessories

series.

for 2040 only).

46882-075R

43126-012S

54311-092P

59999-163K

5441 1-051
54311

-095

43129-189U

46883-408K

46884-291A

46884-292Z

46884-541

46884-444G
59000-178G

46662-525Y

54499-044F

Service manual (for

RF

connector cable,

Coaxial adapter

Precision co-axial

Impedance adapter,

RF connector

GPIB lead

IEEE/IEC

Rack mounting

from 480

Rack mounting kit (with

from 680

assembly.

adapter block for GPIB socket.

mm to 680 mm.

mm to 840 mm.

2040 series).

TM 4969/3, 50

male

N

cable, 1

kit (with slides) for rack cabinets with

to BNC female.

adapter, N

50 to

m, type N connectors.

male to

75

BNC

Q,

slides) for rack cabinets with

1.5 m, BNC.

Q,

SMA female.

connectors.

Rack mounting kit (without slides).

Maintenance

National Instruments LabWindows instrument drivers.

Transit

kit for 2030/2040 series.

(aluminium).

case

DECT filter.

depths

depths

46882-074C

1-15

GERMAN RFI

DECLARATION FOR CLASS B SELF-CERTIFICATION

Hiermit wird

bescheinigt, dass der 10 kHz

-

2.7 GHz Low Noise

Generator 2041 in Uberein-stimmung mit den Restiminungen

funk-entstort ist.

Der Deutschen Bundespost

und die Berechtigung

Bestimmungen

eingeraumt.

Marconi Instruments Ltd., Longacres,

Hertfordshire, AL4 OJN,

English

We hereby

2041 complies with

German Postal

translation:

certify that the 10 kHz

the RFI suppression requirements of Vfg 1046/1984.

Service was notified that

German Postal Service

compliance.

wurde das

zur Uberpriifung der Serie

has the right to re-test the equipment

Inverkehrbringen

UK

-

2.7 GHz Low

this equipment is being marketed. The

dieses Gerates angezeigt

auf Einhaltung der

St. Albans

Noise AM/FM Signal Generator

AM/FM Signal

der Vfg 1046/1984

The

verify

and

Signed

1-16

A D SKINNER Head

Measurement

of

Standards

46882-074C

CONTENTS

MOUNTING ARRANGEMENTS

CONNECTING

Voltage selector

Fuses

Supply cable

GENERAL PURPOSE INTERFACE BUS (GPIB)

GPIB cable connection
GPIB connector contact assignments

IEEE to IEC conversion

Interface

RACK MOUNTING

BATTERY REPLACEMENT

LIST OF FIGURES

TO SUPPLY

bus connection

PAGE

2-2
2-2

2-2
2-2

2-3
2-3

2-3

2-3
2-3

2-4

2-4

2-4

Fig.
Fig.
Fig.

2-1

2-2

2-3

connector showing voltage

AC

GPIB connector contact

IEEE to IEC

conversion

selector

assignments

and fuse holders

.2-2

2-3

2-4

46882-074C

2-1

MOUNTING

ARRANGEMENTS

Excessive temperatures may affect

remove the plastic

close to other equipment which

or

cover,

if one is supplied over the case, and

hot.

is

performance of the instrument. Completely

the

avoid

standing

CONNECTING TO SUPPLY

Before connecting the instrument to the AC supply, check the setting of the voltage

selector switch

which

is an integral part of the supply connector

Voltage selector

The selected voltage is displayed in a window at the top of the connector. The instrument

is normally

screwdriver into the slot at the top of the moulding and twist slightly so that the

hinge

downwards.

despatched with

Rotate the

Setting Voltage range

V

100

V

120

V

220
240 V

selector set to 240 V. To select another voltage, insert a

the

barrel so that the correct setting is displayed, see Fig.

90-

115 V

105-

-

242 V

188

-

216

265

132 V

at

rear of the instrument.

the

V

the instrument on

cover

is free

2-1.

to

Fuses

V,

1.6 A-TT

each voltage

The correct fuse rating for

V

100

220 V to 240 V, 1 A-TT

Fuses are cartridge type measuring 20

to 120

setting is as follows:

double time lag)

amp

(1.6

amp double time lag)

(1

x

mm

5

mm.

2-1

Fig.

2-2

AC connector

showing voltage selector and

fuse

holders

46882-074C

Supply cable

*

1 1w

i

ru-iMfi * ivn

The AC supply cable is fitted

connector on the rear

follows:

When attaching the supply

the lead

GENERAL

are cut off to avoid intermittent connections resulting

PURPOSE INTERFACE BUS (GPIB)

panel.

Earth

Neutral

Live

lead to a non-soldered plug, it is recommended that the tinned ends

The GPIB interface built

controlled to form

part of an automatic measuring system.

GPIB cable connection

Connection

made

using the rear panel GPIB socket. For this purpose,

an optional accessory,

to other equipment which has a 24-way connector to IEEE Standard

(see Chap. 1 Accessories') may be used.

at one end with a socket

When

fitting a supply plug, ensure that connections are made

-

Green/Yellow

-

Blue

-

Brown

from

into the 2040 Series enables the signal generators to be remotely

the GPIB cable assembly, available as

which

cold flow.

mates

with

the AC

as

of

488 is

GPIB

shown

connector contact assignments

The contact assignments

Fig.

2-2.

DIO 1

DIO 2

DIO

DIO

EOI

DAV

NRFD

NDAC

IFC

SRQ

ATN

EARTH

SHIELD

Fig.

3

4

2-2

in

the

of

GPIB cable connector and

GPIB connector contact assignments

the device

DIO 5

DIO 6

DIO 7

DIO 8

REN

FORMS TWISTED PAIR
FORMS TWSTED PAIR WITH 7
FORMS TWSTED PAIR WITH 8
FORMS TWSTED PAIR WITH 9
FORMS TWSTED PAIR WITH 10
FORMS TWSTED PAIR WITH 11

LOGIC EARTH

WITH 6

connector are as

IEEE to IEC conversion

optional

An

interfacing with systems using a

method of use

46882-074C

is

IEEE to IEC adapter is also available (see Chap.

shown

in Fig.

2-3.

25

-way

bus

connector

Accessories’)

1

to IEC Recommendation 625. The

for

2-3

INSTRUMENT

<IEE

CONNECTOR)

f

-r

IEEE LEAD

Oh

EQUIPMENT

WITH IEEE

CONNECTOR

)

INSTRUMENT

(IEE

CONNECTOR)

IEEE to IEC

ADAPTER

46883-408K

Fig.

1

2-3

IEEE to IEC conversion

Interface bus connection

The cables for the interface bus use special

allows

connected to the same source and secured

however,

The piggyback arrangement permits star

restriction that the total cable length

several

may form a

(1)

(2)

connectors to be stacked one on top

cantilevered

No greater

than

No greater than 2 m

controller) connected to the bus.

structure which might cause damage and should be avoided.

or linear interconnection

the

for

20 m

ft).

(65

ft) times the total number of devices (including the

(6

)EC LEaD

f

male-female connectors

another permitting several cables to be

of

lockscrew mechanism.

by a

system must be:-

(

|

EQUIPMENT

CONNECTOR

between

WITH IEC

at both ends.

Too

devices with the

the

'

C0032

This

large a stack,

RACK MOUNTING

The instrument, which

standard 19 inch rack (see 'Optional accessories'). There are two slide rack mounting kits

accommodate different depths

mounting kit without slides is also available which contains front panel mounting brackets

BATTERY REPLACEMENT

The lithium battery has

replaced every

replacement is made.

If a lithium battery is unobtainable an alkaline battery

life.

2-4

two

an estimated life of

years. The clock will continue to run for approximately

is normally supplied for bench mounting, may

of cabinet. These kits include full fitting

years, but it is recommended that it should be

5

instructions.

30

be

can

used, but

be

mounted in a

A rack

only.

seconds while the

will have

a shorter

46882-074C

to

CONTENTS

INTRODUCTION 3-1-4

CONVENTIONS

FRONT PANEL 3-1-4
REAR PANEL

THE MENUS 3-1-7

FIRST TIME USE

DETAILED OPERATION 3-1-12

CARRIER

OUTPUT LEVEL 3-1-12

MODULATION

MODULATION

MODULATION MODES 3-1-19

CONTINUOUS

SIGNALLING (sequential calling

INCREMENTING

Displaying shifts 3-1-27

SWEEP .3-1-28

Chapter

3-1

OPERATION

PAGE

3-1-4

3-1-6

3-1-9

Switching

Changing the value of the selected

Enabling or disabling

Using
Using the control knob 3-1-10

the [It

on

xlOj

the modulation

and [U

-*-10]

parameter

keys

FREQUENCY

Carrier ON/OFF 3-1-12

Choice of units 3-1-12

Reverse power

Selecting the modulation 3-1-13

Modulation ON/OFF

Selecting amplitude modulation

Selecting frequency modulation
Selecting phase modulation 3-1-14
Selecting

Modulation source frequency 3-1-15

Source

selection

protection

wideband

-

frequency

internal

modulation

LF phase

Source selection

-

external

Low intermodulation mode

Selecting pulse modulation

(applies if Option 002

is

fitted)

ALC 3-1-18

Single 3-1-19

Dual 3-1-19

Composite 3-1-19

Dual composite 3-1-19

Modulation

Setting the modulation 3-1-20

mode selection

TONE SIGNALLING (CTCSS)

Tone selection 3-1-21

Selecting alternative

Editing

Tone

Selecting alternative tone standards

Editing

Setting

Sweep

a tone standard

selection

tone

a

increment values

type 3-1-28

standard

(using A)

tone standards

tones)

3-1-9

3-1-9

3-1-10
3-1-10

3-1-12

3-1-12

3-1-13

3-1-13

...3-1-14

.......3-1-14

3-1-14

3-1-15
3-1-16
3-1-17
3-1-17
3-1-18

3-1-19

3-1-20

3-1-21

3-1-21

3-1-22
3-1-22

3-1-25
3-1-25
3-1-27

3-1-27

46882-074C

3-1-1

Sweep

Start

Stop

Number of

Step time

mode....

value

value

steps

Markers

Starting the sweep

Stopping the sweep

UTILITIES

Adjusting the display

Hardware

Software information

External trigger .

Setting the modulation mode
Setting the GPIB address

Sequential calling tones

Carrier phase adjustment

Selection

information

frequency standard

of

Noise mode selection

Selection menu 2

Calibration

Latch data

Elapsed time

Setting time and date

Locking and

Display blanking

Power

up

options

RF level units

level units

LF

RF level utility

LOW

FREQUENCY

LF monitor

Modulation source
Modulation

drive

Use as an independent

MEMORY

Memory recall

Full recall

Partial recall

Carrier recall

Sweep recall

Recalling data

Inhibit ON/OFF

Memory stepping facility

Memory

Full store

Partial store

Carrier store.

Sweep store

Storing data

Store erase

Frequency hopping

ERROR HANDLING

Foreground errors

Background errors

ERROR MESSAGES

store

unlocking

OPERATION

monitoring

monitoring

LF

generator

3-1-30
3-1-30
3-1-30

3-1-31
3-1-31
3-1-31

3-1-32
3-1-32

3-1-34
3-1-34

3-1-35
3-1-35
3-1-35

3-1-36

3-1-36
3-1-36

3-1-36
3-1-36
3-1-37
3-1-38

3-1-38
3-1-39
3-1-39

3-1-39

3-1-39

3-1-40
3-1-40
3-1-40

3-1-41

..3-1-42

3-1-45
3-1-45
3-1-45
3-1-45

3-1-46
3-1-47

..3-1-47

3-1-47

....3-1-47

3-

-48

1

3-1 -48

3-1-48

3-1-48
3-1-48

3-1-49
3-1-50

3-1-50

3-1-51

3-1-51
3-1-51

.....3-1-51

3-1-51

3-1-55
3-1-55

3-1-55

3-1-56

3-1-2

46882-074C

LIST OF TABLES

urtnH

i iuiy

LIST

Table
Table
Table
Table
Table

3-1-1

3-1-2

3-1-3

3-1-4

3-1-5

OF FIGURES

3-1-1

Fig.
Fig.

Fig.

Fig.
Fig.

Fig.

Fig.

Fig.

Fig.
Fig.

Fig.

Fig.
Fig.
Fig.
Fig.
Fig.

Fig.

Fig.

Fig.
Fig.

Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.

Fig.

Fig.
Fig.

Fig.
Fig.

Fig.

Fig.
Fig.
Fig.
Fig.
Fig.
Fig.

3-1-2

3-1

3-1-4
3-1-5

3-1-6

3-1-7

3-

1

3-1-9

3-1-10

3-1-1

3-1-12

3-1-13

3-1-14

3-1-15
3-1-16
3-1-17
3-1-18
3-1-19
3-1-20

3-1-21

3-1-22

3-1-23

3-1-24

3-1-25

3-1-26

3-1-27
3-1-28
3-1-29

3-1-30

3-1-31

3-1-32

3-1-33

3-1-34

3-1-35

3-1-36

3-1-37
3-1-38
3-1-39

3-1-40

3-1-41

2041

2041 rear panel

-3

Sig gen menu

Sig

Sig gen menu

Amplitude

RPP tripped 3-1-13

-8

Internal source

LF

External source selection

1 Sig gen menu

Continuous tone selection menu 3-1-21

Sequential calling

Sequential

Calling tones mode

Tone standard

Edit sequential tones

Total shift menu

Sweep
Sweep type menu
Sweep

Markers menu

Sweep
Sweep stopped 3-1-33

RF level

Utilities selection

Display

Noise

Utilities selection

Calibration

RF level units

LF level

RF level utility

Normal

Extended hysteresis

starting level 3-1-43

RF offset adjustment menu 3-1-44

LF generator menu 3-1-46

Memory

Memory stepping
Memory

Frequency hopping menu 3-1-53

List of available softkeys

Background

Foreground

errors 3-1-56

errors 3-1-56

GPIB errors

Fatal

errors

front panel

-

default display for 2040

gen menu

-

default display for

-

default

modulation

selection menu

display for 2042

-

menu configuration

for different modulation

2041

modes

3-1 -45

3-1-57

3-1-58

3-1-4
3-1-6

3-

3-1-7

3-

3-1-10

3-1-16

phase control 3-1-16

menu

with two modulation

tones utility menu

calling tones utility menu

control menu (with [FM]

selection

parameters

menu

standard menu

display

channels

(DTMF mode)

selected)

3-1-17

3-1-20

3-1-22

3-1-23

3-1-24

3-1-25

3-1-26

3-1-27

3-1-28
3-1-29

trigger mode

in progress 3-1-32

transferred 3-1-33

adjust menu

menu

menu

1

3-1-30

3-1-31

3-1-34

3-1-35

mode selection menu 3-1-37

menu

utilities menu 3-1-39

selection menu (shown

units selection menu

2

(shown unlocked

unlocked to

to

level

level

1)

1)

menu

signal generator level control

operation with an RF level

recall menu 3-1-47

operation

of

-9

dBm as the

menu

store menu

3-1-38

3-1-41

3-1-41

3-1-42

3-1-43

3-1-49
3-1-50

-7

1

-8

1

46882-074C 3-1-3

INTRODUCTION

This chapter explains

•

Set up

•

Select the main

modulation.

•

Use

the

CONVENTIONS

The following

RF OUTPUT

[MEM]

Int. F4

[Pulse]

how

to:

the

signal

full range of supporting facilities.

conventions

Capitals refer to

Capitals in square brackets indicate hard key titles.

Italics refer to data or messages on the display.

Italics in square brackets indicate soft key titles, e.g. [Pulse] means the

soft key

generator

operating

are used in this

adjacent

to produce a typical basic

parameters; carrier frequency, output

chapter:

titles marked on the panel.

to the Pulse title box

signal.

at the side of the menu.

level

and type of

FRONT PANEL

Parameters are selected by means of hard keys, which

them,

see Fig.

functions

set parameters to specific

keys

soft

3-1-1.

are

or the rotary control knob.

which

keys,

The hard keys

determined

do not

have any notation,

have

the menu which

by

values which

have

their function

numerical key pad and a rotary control knob,

a

functions which do not change,

being displayed. The numerical keys are used to

is

can also be varied in steps

of

any

whereas

size

by

printed

the soft key

using

the 1T/-U-

on

3-1-4

Fig.

3-1-1

2041 front

panel

46882-074C