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

(1)

SUPPLY Switches

the AC supply voltage

on

and

off.

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

(13)

CARR ON-OFF Enables

disables the carrier frequency.

or

MOD ON-OFF Enables or disables the modulation.

LF ON-OFF

UTIL Displays

MEM Displays

Switches the low frequency output on

utilities

the

memory store/recall menu.

the

menu.

A Displays the total shift menu.

LF Displays the LF and monitor menus.

and off.

SWEEP Displays the sweep status menu.

SIG GEN Displays

SOFT KEYS Twelve function keys change notation as the menu changes.

NUMERICAL

KEY PAD

UNITS KEYS Determine the

For changing the value of a selected parameter. Minus sign and

decimal

entry.

main menu.

the

point

are included.

units of

set parameters and terminate the numerical

(14)

(15)

(16)

(17)

(18)

(19)

(20)

(21)

(22)

CONTROL KNOB When

xio When

ir

enabled, adjusts the

knob disabled, increments a selected parameter.

value

of

the

selected

parameter.

When

knob enabled, increases knob sensitivity by value of ten.

KNOB

IU10

UP-DN Switches between control knob and If

When

knob enabled, decreases

knob disabled, decrements a selected parameter.

sensitivity by value of ten.

knob

11

keys.

When

LF OUTPUT BNC socket provides a low impedance output at the frequency

selected at the LF GENERATOR MENU

modulating signal.

or

monitors the

RF OUTPUT 50 Q N type socket with reverse power protection.

PULSE

50 Q BNC socket (if fitted) accepts a pulsed signal.

INPUT

EXT MOD 1

INPUT

EXT MOD 2

100 kd BNC socket. An independent input which allows an

external modulation signal

100 kQ BNC socket, similar

to be applied.

to

(21).

INPUT

46882-074C

3-1-5

REAR PANEL

(1)

The following facilities are available on the rear panel, see Fig.

GPIB

3-1-2

Fig.

pin socket accepts standard IEEE connector

24

control

of

2041 rear

the

instrument.

panel

3-1-2.

allow remote

to

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

SWEEP MARKER BNC

socket supplies

SWEEP RAMP BNC socket provides
SWEEP TRIGGER BNC socket

WIDE BAND

FM IN

FREQ STD

IN/OUT

VOLTAGE

SELECTOR

FUSES

AC SUPPLY

INPUT

BATTERY

BNC socket

a typical bandwidth of 10 MHz.

BNC socket for standard frequencies at

levels.

Removable cover reveals barrel which can be rotated to

required voltage range.

AC fuses rated at 1.6 A (double time lag) for the 100 to 120 V

range and 1 A (double time lag) for the 220

pin plug integral with voltage selector and fuse holders.

3

with

supply lead

Houses battery for real time

provides access for a

accepts a

socket.

HOLDER

sweep

a ramp output at 0 to 10

marker.

V

peak to peak.

trigger input.

wide bandwidth FM signal into

or 10 MHz at TTL

1,

5,

240 V range.

to

clock.

50 O with

select the

Mates

3-1-6

46882-074C

THE MENUS

The 2040 series instruments are operated by calling up

screen. Menus are accessed via both hard

appropriate

primary

menu to appear on the screen regardless of the current

and

soft

keys.

Pressing

various

displays or menus on the

hard key normally causes the

a

working position

within the menu hierarchy. As the display changes from one menu to another, so the 12 soft keys

assume those functions necessary

displayed by pressing a soft key while in a primary menu. Some sub-menus

UTILITIES. Clearance from these is obtained

to

drive

the instrument from that

pressing the [EXIT] key.

by

menu. Secondary menus are

are

nested e.g.

Fig.

Fig.

3-1-3

3-1-4

Sig

gen menu

Sig gen menu

-

default display

-

default

display

for

for

C0467

2040

C0468

2041

46882-074C

3-1-7

Carrier

Freq.

:

5 400.000 0000

MHz

RF Level

Low Noise

:

-144.0

1 Modulation ENABLED

Mode

FM

Int F4 : 1 .0000

dBm

0

Int

Hz ON

kHz

ON

Std:

10 MHz

exa

FIRST TIME

USE

First time users can

carrying

having

the

the following

out

following

Switching on

(1)

(2)

Before switching the instrument

the value

is present on the PULSE INPUT

If

a previous user

memories

proceeding any further

Switch off and

and terminating by pressing the [enter]

factory default setting.

If the RF level units and

be changed

’Selection of frequency

quickly become familiar

exercise, which

parameters:

Carrier frequency:

Output

level: 10 dBm.

demonstrates

Amplitude modulation:

of the power supply as described

the default display shown in Fig. 3-1-3,

have

may

recalled rather than using

set the instrument to switch on with

should

you

with

100 MHz.

30% depth at 1 kHz.

on, check that the voltage selector

socket.

reset this selection, see 'Power

on again. Alternatively use the MEM

the intemal/extemal standard are not as shown, they

as described on Page 3-1-42, ’RF level

standard’.

the principles

how

to set up a typical basic signal

of control and display by

has been set to

in Chap.

3-1-4

Fig.

and that no signal voltage

2,

or Fig.

3-1-5

is not obtained,

one of the user

the default factory settings. Before

up options'.

followed

key

key. This will reset the instrument

units' and Page

by entering 50

to the

can

3-1-36

(3)

Observe

for FM. The soft

that the main menu

bordering the label is increased

anything entered

(4)

If necessary,

3-1-34.

Page

Changing the value

If an error is made when

If an error message

(1

)

(2)

(3)

(4)

is displayed, it can be cancelled

Using

the numerical key pad, enter 100 MHz

key marked [MHz/mV/ms].

100.000

Press [RF level].

0000 MHz.

Using the numerical

marked

Press [AM]

display AM modulation parameters in

[Hz/dB/radj. Observe that the RF

on the right-hand side

highlighted.

appears on the display showing default parameters

key label marked [Carrier Freq.]

in thickness

at this stage will change the carrier frequency.

adjust the display for brightness and contrast,

to about

is highlighted (i.e. the line

1 mm),

of the selected parameter

keying in, press the soft key again and key in the

by entering a value

which

by pressing keys

Observe that the Carrier Freq. display

The RF level soft key label is now highlighted.

key pad, enter 10 dBm by pressing keys

Level display changes to 10.0 dBm.

on the left-hand side of the display.

the lower panel. The [FM Devn

of the menu changes to [AM

AM disappears

from

the left-hand

The menu will now change to

depth] and this label is now

side.

which

is within limits.

[1],

means that

see UTILITIES'

correct value.

[0], [0]

and the

changes to

[1], [0]

and the key

soft

.]

key

46882-074C

3-1-9

/

(5)

Using the numerical key pad, enter 30% AM depth by pressing

[kHz

jiV/%].

now be as in Fig.

OUTPUT

Observe

socket.

that the AM depth display changes to 30%. The display will

3-1-6

and the selected

signal will now be present at the RF

[3],

[Oj

and

Enabling or disabling the modulation

The modulation is ON

[AM ON/OFF] at

disabled by pressing [MOD ON-OFF]. These are both toggle actions, i.e. press ON, press OFF.

the right-hand

The soft key acts only on the selected

modulations.

default, but the AM can be turned ON and OFF by pressing

by

side of the display and the modulation can be

modulation whereas

the [MOD ON-OFF] acts on all

enabled

or

3-1-6

Using the [It

When a parameter

Fig.

xIO]

and

Amplitude modulation

[It

+10]

been selected via the numerical key pad,

has

keys

incremented or decremented either in steps using the [IT] key and the

the control knob. Select [Carrier Freq.] and observe that the effect of pressing

keys is to change

parameters

function)'.

but

the

carrier frequency in steps of 1 kHz. Default step sizes are assigned to all

these can

be

changed,

see

Page

-

menu configuration

3-1-27,

'INCREMENTING (using the delta

[-it]

key, or continously with

Using the control knob

(1)

(2)

[KNOB UP-DN]

Press

On the display, brackets will appear above and below the selected parameter.

These brackets embrace the part of the

Pressing the [xIO] key shortens the bracket length by one decimal place. Pressing

[-5-10]

the

sensitivity of the control knob can be increased or decreased by a factor of ten.

key increases the bracket length by one decimal place. In this

enable the control knob.

to

value

which the control knob can change.

C0470

value can be

its

[ft] and [-it]

the

way

the

3-1-10

46882-074C

(3)

Rotate the control

[KNOB UP-DN]

knob and observe the change in

to disable the knob.

the selected parameter. Press

Note...

(4)

For other parameters,

the control knob.

For RF Level the

press the relevant soft key and

knob resolution

is fixed at 0.1 dB.

use the

[IT]

and

[li]

keys or

46882-074C 3-1-11

CARRIER FREQUENCY

]

DETAILED OPERATION

The carrier frequency is selected from the main menu

it is already

Enter the

highlighted

required value via

in

as

the default display.

the

numerical key

pad.

pressing [Carrier

by

The value can then be incremented or

decremented using the control knob and its associated keys, [KNOB UP-DN],

If a value outside the specified range is requested, the message:

ERROR 51: Carrier Outside Limits

is displayed on the screen

set to the end of the range.

Carrier

effectively switches the output ON and OFF,

ON/OFF

carrier may

The

when

switched ON

be

terminator

the

or

key

OFF

retaining

is pressed, and the instrument is automatically

any time via the [CARR ON-OFF] key. This

at

the 50 Q output impedance.

OUTPUT LEVEL

required

message:

The output level is selected at the Sig

value

on the

numerical key pad.

If a value outside the

menu by pressing [RF Level] and entering the

Gen

specified range is requested the

Freq.J,

[xlO] and

unless

[+10].

ERROR 52: RF

Level

Outside Limits

or

ERROR 17: RF Level limited by AM

is displayed and the instrument is automatically set to the end of the range.

Choice of units

Units may be pV, mV, V or dB. Conversion between dB and the

out by pressing the

appropriate

units key, i.e. to change dBm to a

voltage unit, press any voltage

key for the correct conversion. The choice of Volts EMF, Volts PD, and the dB reference is

made by using the

Reverse

protection circuit (RPP) and a flashing message

power protection

Accidental application of power

[RF

Level Units

utility, see Page

the RF OUTPUT socket trips the reverse power

to

3-1-40,

appears

on the

level units'.

'RF

display,

voltage

see

Fig.

units is carried

3-1-7.

3-1-12

46882-074C

.

RPP

TRIPPED

RPP

reset

***

REMOVE SIGNAL SOURCE

3-1-7

Fig.

Pressing [RPP reset] resets the RPP and

power protection

trip

again.

was tripped. If [RPP reset]

returns the

MODULATION

The carrier

an option. The internal modulation oscillator

resolution

see the PERFORMANCE DATA section

of 0. 1 Hz.

Selecting

The

type

can be selected by soft keys at the

3-1-19,

Page

can be

frequency, amplitude,

The modulation

the modulation

of modulation

'Modulation

required, AM, FM, <E>M,

mode selection'.

bandwidth

in

main menu. Four

***

C0039

RPP tripped

display

pressed with the signal still applied, the RPP will

is

phase modulated, with pulse modulation

or

has a frequency range of

available

Chapter

1

to the menu in use when the reverse

0.1

Hz to 500 kHz,

depends on the noise mode selected

wideband

modulation modes are available,

and optional pulse modulation

with

as

a

see

Modulation ON/OFF

[MOD ON-OFF] switches all modulation

the centre of the main display,

Modulation is also controlled

modulation

hard

key and turned on via the soft key. In single modulation modes

and the [FM ON/OFF],

function,

keys only reduce the modulation

the modulation

46882-074C

to appear on the carrier, modulation must be both enabled with the [MOD ON-OFF]

[AM ON/OFF], /<DM ON/OFF] keys appear to carry out the same

but the action is different, particularly in the FM mode. The [FM ON/OFF] etc. soft

system such that the instrument reverts to a earner frequency generator.

e.g:

Modulation DISABLED

a soft key which turns

by

zero whereas

to

or OFF

ON

the selected modulation on and off. For

the [MOD ON-OFF] key completely disables

and the condition is indicated in

[MOD ON-OFF]

the

key

3-1-13

Selecting amplitude modulation

(1)

(2)

At the Sig Gen menu, press [AM], the [AM Depth] box is now highlighted.

Enter the required

the

to the maximum value

key. If the modulation depth requested

[%]

modulation depth via the numerical key pad and terminate with

available and the message:

ERROR

is displayed at the

(3)

Switch the AM ON or OFF

displayed in

the

Selecting frequency modulation

(1)

(2)

(3)

At the Sig Gen menu, press [FM], the [FM Devn.] box will

Enter the FM deviation value via the numerical key pad and

[Hz], [kHz] or [MHz],

Switch the FM ON or OFF via [FM ON/OFF].

in the

lower half

of the screen.

top

lower

half of the screen.

of the screen.

56: AM Outside Limits

pressing [AM

by

ON/OFF]. The AM

exceeds

FM

The

99.9%,

the depth is

highlighted.

be

terminate

information

reset

information

it with

is

displayed

is

Selecting

phase

Note that phase

use phase modulation the instrument must be

(1)

(2)

(3)

At the Sig Gen menu, press [OM].

Enter the phase modulation deviation value via the numeric key pad and terminate

it with the [RAD]

Switch the OM ON

displayed in the

modulation

modulation

is

key.

or

lower

not available

in the low noise modes of the 2040 series. To

in the normal

The [<&M Devn.]

OFF

via the ]<£>M ON/OFF] key. The <£>M information is

half of the screen.

Selecting wideband frequency modulation

(1)

(2)

At the Sig Gen menu, press [Wideband FM]. The [Wideband FM] box will

highlighted.

The value can be changed via the key

preserve the widest

series of Fixed steps and the signal generator automatically displays the calculated

fixed step which

the rear panel WIDE BAND FM IN socket will produce the indicated deviation.

bandwidth, the control of the wideband FM is carried out in a

is closest to the keyed

noise mode

(see

box will

and frequency terminator key.

pad

value. Applying a 1 V RMS signal to

in

3-1-37).

Page

highlighted.

be

be

To

3-1-14

46882-074C

]

(3)

Note...

The [IT] and

CAUTION

The WBFM socket

voltage

Modulation

(1

)

(2)

Pressing

When

the nulling facility. Nulling

legend:

appears briefly

[AC/DC Coupling] changes the coupling from AC to DC

the input is DC coupled,

small

can be effected by pressing [DCFM Nulling]. The

***

DCFM NULLING

on the display.

[•!!•] keys and the control knob do not operate for wideband FM.

input impedance is 50 Q. The DC component of of any applied

frequency

***

offsets can be reduced by using

must not exceed 5 V.

source frequency

At the Sig Gen menu press [Source

Enter the required source frequency and terminate the

[MHz].

Freq.J.

vice versa.

and

entry with [Hz], [kHz] or

Note...

When

Freq

.]

number

Source selection

modulation

the

legend is replaced with

entered.

to be

-

internal

The modulation source

internal

or external. If the currently selected

Menu is displayed, giving

assigned

with [Hz], [kHz], [MHz] or

waveform. The

see 'SIGNALLING'. Pressing

3-1-9.

Fig.

end

of each line

triangular wave if [Triangle

horizontal

die highlighted

to

selection of sub-audible continuous tones can

The

LF source phase angle can be varied from

show

bar is shown when a source is not selected or is

a symbolic sine wave when

source is operating as

the [Tone Number]. Pressing

may be selected by pressing

source is

a choice of six frequencies, F1-F6, see Fig.

F number may

[GHz]. Soft keys allow the selection of either a sine or triangular

[Mod. Src Phase

changed

be

displays the LF Source Phase Control menu, see

continuous signalling

a

the

Select Source]. Sources may

[

internal, the Internal

by the

a source is selected. This changes to a

numerical key

achieved

be

-180°

to

+180°.

allows

key

3-1-8.

pad and terminated

pressing

by

The

the [Source

tone

a new tone

Source Selection

The frequency

[CTCSS],

pictograms at the

Wave] is selected. These symbols also appear- on the main menu.

available.

not

be

A

46882-074C

3-1-15

LF phase

Fig.

3-1-8

C0040

Internal source selection menu

When an internal source has been selected,

oscillator

value. Where

between the two signals can be set

oscillator.

fitted) can be changed

(if

two internal modulation frequencies

by pressing

and

up

the phase angle is referred to the currently selected

phase relative

its

[Mod.

are

phase

modulation

difference

C0041

to the second

Src Phase] and entering the required

active, the starting

3-1-16

Fig.

3-1-9

LFphase control

46882-074C

]

wr I—IIM t IV/I'I

Source selection

An external source

Selection Menu

pressing

[Select Source] if the currently

is then displayed on the

-

external

may be selected

choice of two input sockets

coupling

by

pressing

the appropriate

symbolic arbitrary waveform

the main menu.

the input

is DC coupled, small

Nulling can be effected

Select

External

horizontal

A

by pressing [DCFM Nulling].

pressing

by

screen.

selected source is external.) This menu allows

EXT MOD 1 INPUT and

soft key. The pictograms at the end of each line

(This

Select External]. The

[

menu is displayed immediately when

EXT MOD 2

INPUT

and AC, ALC, or DC

when an external source is selected. This symbol also

bar is shown when

frequency offsets can be reduced by using the nulling

External Source Selection

Current Modulation: FM

Ext Mod 1

Ext

Mod 1 ALC Coupled

Ext Mod 1 DC

Ext Mod 2 AC Coupled

Ext

Mod 2

Ext Mod 2 DC

source

a

AC Coupled

Coupled

ALC

Coupled

Coupled

is not selected or is not

Menu

Extl ALC

K\/V/|

—

I

1

I [

:

::

1

|

[

|

—

f—

-j

Ext2 ALC

Extl

Coupling

Coupling

Extl DC

Coupling

Ext2 AC

Coupling

Coupling

Ext2 DC

Coupling

External Source

show a

appears on

available.

When

facility.

LOCAL

AC

the

Fig

.

Low

combined using a resistive

together (less than 2

signal

difference in carrier frequencies

doing

intermodulation products.

disabled

intermodulation mode

When carrying

out intermodulation

or hybrid combiner. If the carrier frequencies are relatively

MHz in normal noise mode)

from the other source.

RF

the

to prevent the injection of AM sidebands.

If pulse

(1)

(2)

ALC system will generate

By using the low intermodulation mode the

modulation is not fitted proceed

At

the Sig Gen menu press [Low Intermod].

This

causes either Low Intermodulation Disabled

Enabled to be displayed in the lower

Press

(3)

the [MOD ON-OFF] key to toggle between

C0042

3-]-]0

External source selection menu

tests the output signal from

each generator

two

signal generators

will receive

an interfering

The RF ALC system will detect a beat frequency equal

and attempt

apply AM

to

in order to cancel the signal. In

AM sidebands which are indistinguishable

RF ALC system can

follows:

as

or Low Intermodulation

panel.

the enabled and disabled states.

is

close

to the

so

from

be

(4)

If an attempt

No Steps Allowed will be

46882-074C

is made to [Set Steps

displayed.

from the A menu,

the message Low Intermod:

3-1-17

]

follows:

together with Low Intermodulation

lower panel.

message PULSE : No

Note...

If pulse

(

(2)

(3)

(4)

1 )

Press the [

This causes the message PULSE ON to be displayed.

Press the [Pulse ON/OFF] key.

This causes PULSE OFF to be displayed

Disabled or Low Intermodulation Enabled shown in the

(5)

(6)

Press the [MOD ON-OFF] key to toggle between the enabled and

If an attempt is made to [Set Steps] from the A menu, the

Steps Allowed

AM is not

modulation (Option

Mod

Pulse

will

be

available in the Pulse Modulation or Low Intermodulation modes of operation.

is fitted proceed as

002)

key.

displayed.

Selecting pulse modulation (applies if Option 002 is fitted)

(1)

At the Sig Gen menu, press [Pulse Mod],

will

highlighted.

be

when

Pulse Mod box on the display

the

disabled states.

(2)

Selecting and enabling pulse

Level Control mode,

this process

frequency

the

(3)

carrier

disabled

Switch pulse mod on or off with the [Pulse

controlled by the logic

front panel. A logical T (a voltage between 3.5 and 5

logical 'O' (a voltage

effectively applies a logical T allowing carrier output.

MODULATION ALC

automatic levelling

The

can

disabled when not required. To enable the ALC, proceed as follows:

be

(1)

At the Sig Gen menu, press [Select Source]. The display will

External Source

(2)

If necessary press [Select External] to obtain the External Source Selection Menu

3-1-10).

(Fig.

the RF level control loop to

100

to action. For best accuracy,

ms

which

mod changes

can take up to

should be repeated before measurements are taken if

or RF

level

have been changed

RF level is controlled

level

applied to the PULSE

between

control (ALC) is used

0 and 1.0 V)

the normal way.

in

On/Off]

suppresses it. Turning pulse mod off

in conjunction with an external source and

recently. When pulse mod is

When

key.

'On', the

INPUT socket mounted on the

V) allows

carrier output, a

show the Internal or

Selection

Menu (Fig.

3-1-8

or Fig.

3-1-10).

the Direct

neither

carrier

the

is

(3)

Select the required external source from the

Coupling] or [Ext 2 ALC Coupling]. The pictogram at the end of each

change from a

selected.

(4)

3-1-18

Return to the Sig Gen menu

ALC

coupled

horizontal line

appears at the

options shown, e.g. [Ext l ALC

arbitrary waveform symbol when the source is

to an

pressing [SIG GEN]. The legend Ext

by

bottom of

the display.

line will

Mod

(or

1

46882-074C

2)

v/r i—i mi iwi’i

(5)

Apply

level.

signal to

a

If the input applied

range (at least 0.7

will be displayed

the arbitrary waveform

MODULATION MODES

Two

independent inputs

summed with

fitted).

give single, dual, composite

Thus up to four modulations

Single

In the single mode,

another modulation

Dual

In the

modulation,

signals from the internal oscillator and

and dual composite modes.

cancels the first.

dual mode, a common carrier wave is modulated

e.g. one AM and one FM.

the EXT MOD 1

to the external modulation socket is outside the

to 1 .4

at the top of

V

RMS) HI or LO

the

screen.

EXT MOD

or

will

the level is within

If

input

2

be indicated and

symbol will appear alongside the modulation value.

on the front panel allow external modulation

a second optional internal oscillator

may be available at one time. These can

only one modulation can be active at any one

by two different types

Each type of modulation carries separate information.

socket and vary the

ALC

an error message

the required range,

signals to be

(if

be combined to

time, and selecting

of

Composite

This mode consists

effective

modulation

being

used for pulse or wideband modulation.

Dual composite

This mode is similar

the sum of two

sources, e.g. FM1 + FM2 and AMI +

Modulation mode selection

In order

(1)

(2)

(3)

to select a different

Press [UTIL]. Utilities

Press [Mod'n Mode]. The

required soft key.

Press [SIG GEN]

individual source

two

of

the sum of the

to single composite with each of the two modulating

modulating channels with similar

modulation mode;

to return to the Sig Gen menu where the

parameters will be shown.

modulation,

channels being

waveforms

two

e.g.

FM1 +

types of

FM2. This mode cannot be

AM2.

Selection Menu 1 will appear on the display.

display changes to show the four options. Press

modulation and

the

the

Note...

Full information on

46882-074C 3-1-19

the range of utilities can be found under

'UTILITIES'.

Setting the modulation

]

]

(1)

(2)

(3)

(4)

Select the required modulation

[FMJ] or

now

/

highlighted, see Fig.

. The box containing the parameters for the selected channel

FM2J

3-1-11.

At this point, the modulation frequency, deviation

source frequency

the value in

The source

[Select Source

the usual way.

can be changed from internal to external or vice versa

also

can

for the relevant source selection

be changed by pressing [Source Freq:Fn

When an internal source has been selected, its

[Mod. Src Phase]

frequencies are active, the starting phase difference between the two signals can

be set up and the phase angle

and entering the required value. Where two internal modulation

channel by pressing the

or

menu.

phase can be changed by pressing

is referred to the currently selected oscillator.

relevant

depth can be altered.

soft key, e.g.

and entering

by

LOCAL

Carrier

Freq.

RF

Level

FM1

Devn.

Source

Freq: F4

FM

ON/OFF

Select

Source

Low

Intermod

AM

FM2

Wideband

FM

“:

RF Level

Low Noise

FM1:

Int

500

F4

: 1.0000 kHz Int F2

mhz

ON

:

2

-^44

700.000

dBm

Q

0000

Int Std: 10 MHz

Mode 1 Modulation ENABLED

Hz 0N

FM1:

2.50

kHz ON

EX2

400.0 Hz

:

is

The

pressing

3-1-11

Fig.

CONTINUOUS TONE SIGNALLING

A CTCSS tone is any one of 32 standard

250.3 Hz and would generally

composite modulation mode. The procedure for initiating these

3-1-20

C0471

Sig gen menu

with two

modulation channels

(CTCSS)

sub-audible tones ranging from 67 Hz to

be used in conjunction with an audible modulation signal in

tones is as

follows:

46882-074C

a

J

.

Tone

selection

(1)

(2)

(3)

At the

At the Internal Source

Selection Menu is now displayed, see Fig

Key in the required

Select

Standard

Edit

Standard

Gen

Sig

Tone Number:

Int F4:

menu, press

tone number

Continuous Tone Selection Menu

Current Standard: CTCSS 1

Select Source].

[

Selection Menu, press

to

(0

-

01

71.9

Hz

15)

3-1-12.

/

and press

CTCSS

[enter]

The

].

Continuous Tone

LOCAL

Tone

Number

Select

Source

3-1-12

Fig.

Selecting

alternative tone standards

A list of the 16 tones of the current standard is

This action displays the Tone Standard

select

from

further lists of 16 tones, press [CTCSS2] or [USER]. The Tone Standard Selection

Continuous tone selection

available

Selection Menu

with the current standard

menu

by pressing [Select Standard].

Menu changes to show the new list.

Editing a tone standard

Pressing

standard can be edited

Continuous Tone Edit Utility menu.

CTCSS

tones set at a default value of 10 Hz at switch on. Tones can then be changed

No], [Tone Frecj], [Next Tone]

new

the

standard.

standard can be saved by pressing [Store to User]. USER then becomes a user defined

[TEMP] displays a further list of 16 tones set to the default value of 10 Hz. The

selecting [Edit Standard] from the menu in Fig.

by

CTCSS 2 or USER can be be loaded to TEMP,

1,

[Previous

or

Tone].

When the required

which

3-1-12.

volatile

is a

changes have been made,

C0044

highlighted. To

gives

This

store of 16

using [Tone

by

the

Note...

Selecting

[CTCSS!

],

Menu causes the pictogram in the Continuous Tone Selection Menu and the Internal

Source Selection Menutochange

section of the Sig Gen menu.

46882-074C

[CTCSS2], [USER] or

e.g. ctcl.

TEMP

/

from the Tone Standard Selection

The pictogram

repeated

is

in the modulation

3-1-21

]

SIGNALLING (sequential calling

There are eight sequential calling

Tone Standard Selection Menu, Fig.

EEA, EIA

and

NATEL.

There is also provision for

USER1 and USER2. DTMF signalling

oscillator (Option

Sequential calling tones

pressing

[Send Tones]

Tones] also appears on the calling

001)

is fitted.

which

appears on the main menu

Tone selection

Pressing the

Calling Jones Utility menu,

Mode

Control

Calling Tones] soft

]

see Fig.

3-1-16.

are set up from a utility menu, Fig.

tones menu.

3-1-13.

Sequential Calling Tones Utilty

Current Standard: CCIR

Mode: NO MODULATION SELECTED

tones)

tone standards

available,

They are, CCIR, EURO, DZVEI,

the user

tones can also be generated if the second modulation

after the tones

key at Utilities Selection Menu 1 calls up the Sequential

to define

each

3-1-26,

having

16 set tones, see

ZVEI1,

of

sets

user tones in

and are activated

have

been set

LOCAL

Tone

Sequence

Duration

Sequence

ZVEI2,

up.

by

[Send

Select

Standard

Edit

Standard

Store

Tones

Recall

Tones

[Tone Sequence] Pressing this

side of the menu. To change

numerical keypad and the soft

[Duration Sequence] Pressing this

appear at the left-hand side

the

sequence. A dash

These two keys disappear

[Define

and pressing

Repeat] allows a repeat

enter. For example, if the repeat

Tone Sep,

Dur. Seq.:

Frequency Offset

Extended Duration:

Repeat

Start Delay

Default

3-1-13

Fig.

FFFFFFFFFFFFFFF

Tone

Duration

key causes hexadecimal data entry keys to appear at the left-hand

the sequence, enter the tone numbers via

keys [A] to [F] and press [enter].

key causes [Default Duration

of the menu. Press either key in turn

indicates the

(-)

when [enter] is pressed.

tone to be defined, by using the [A] to [F] keys and the keypad

be sent as ICICI so that the receiver

each digit

sent.

Freq,

Offset

Extended

the

Duration

Define

Repeat

Start

Delay

digits

C0472

0-9

: 0 %

500 ms

-

: E

: 200 ms

100

:

ms Gap : 6 ms

Sequential calling

tones utility menu

and [Extended Duration] to

to set

default duration and e indicates an extended duration.

is

tone

defined as tone C, the sequence 11111 will

the duration of

tones in

decoders will sense a change in frequency at the start of

on the

[Freq.

for

the new value on the keypad.

3-1-22

Offset]

use in tolerance testing. To change

This facility

alters the nominal tone frequency

Terminate with the

the frequency offset

key.

[%]

by a set

value,

percentage

select [Freq.

(up to

Offset]

±10%)

and enter

46882-074C

]

]

]

]

)

[Store Tones] Up to 20 sequence

number and

[Recall Tones

press

To recall

[enter].

a

set-ups can be stored. Use the keypad

tone

sequence, use the key pad to select the required

and press [enter].

[Start Delay] The delay

adjusted

[ms].

[Mode Control] Pressing this enables

modulation, see

are

affected by the calling tones and

audible

by pressing this soft key, entering

Fig.

triggered and restored after the tones have

tones. [NO mod] This option effectively inhibits sequential

be sent between 1 and 9 times,

pressed. Setting the number

of the

[Send Tones[/[Stop Tones] key at the main menu.

Mode

Control

before the tone sequence starts and the gap between

3-1-15.

Modulation, on the selected channel, is turned

this allows sequential signalling tones

set by

of repeats to 10 allows the tones to be sent

Sequential

Mode: TOTAL FM

enter

to

the store location,

store location

sequences can be

the required delay time on the keypad and pressing

the user to assign the calling tones to a selected

off when the tones

been sent. Modulation on other channels is

to be combined with sub-

tones. The tone sequence can

[No.

Repeats], every time the [Send Tones]

of

continually under control

LOCAL

Calling Tones Utilty

Current Standard: DTMF

-

SINGLE SHOT

Tone

Sequence

type of

not

key is

Select

Standard

Store

Tones

Recall

Tones

Fig.

2040

On

capability is also provided.

[Calling Tones

series fitted with the

soft key at Utilities

functions of the soft

[Tone Sequence

Pressing this

numerical keypad

Tone Seq,

Tone Duration
Tone

Start delay

3-1-14

If this standard is selected the main

keys are as follows:

and the soft keys [A], [B],

terminated by pressing [enter].

[Tone

pressing this key, entering

Duration

The default duration

the required duration value and pressing [ms].

################

4-by-4

CCITT Touch-Tone

70

Gap

Sequential calling

ms

70 ms

200 ms

tones utility menu (

second modulation oscillator (Option

Selection Menu 1 will be as shown in Fig.

key allows a tone sequence to be set up using

[C],

of 70 ms for each tone in the sequence can

Standard

[D], [*]

DTMF

001)

menu accessed after pressing the

and

/#7-

Tone

Duration

Tone

Gap

Start

Delay

C0046

mode

the DTMF

the digits

The sequence entry is

signalling

3-1-14.

0-9

The

on the

be changed by

[Tone Gap] The default gap

changed

46882-074C 3-1-23

by pressing this key, entering the required gap length and

duration of 70 ms between each tone in the

pressing [ms].

sequence can be

]

[Start Delay] The delay before the

adjusted by pressing

[ms].

[Mode Control] Pressing

modulation, see Fig.

are triggered and restored

affected by the calling tones and

audible tones. [NO mod] This

sent between

be

pressed. Setting the number

of the

[Select Standard]

[Send Tones]/[Stop Tones] key at the

this soft key, entering the required delay time

this enables the

3-1-15.

Modulation,

after the tones have been

this allows sequential signalling tones to be combined with sub-

option effectively inhibits sequential tones. The tone sequence

1 and 9 times, set

of repeats to 10 allows the tones to be sent continually under control

Selection of alternative signalling standards is achieved

access the Select Standard Menu.

[Store

Tones] Up to 20 sequence set-ups

number and press [enter].

[Recall Tones] To recall a

and press

[enter].

tone sequence, use the key pad to select the required store location

tone sequence starts and the gap between sequences can

the keypad

user to assign

the calling

on

tones to a selected type of

and pressing

on the selected channel, is turned off when the tones

Modulation on other channels

by [No.

sent.

Repeats], every time the [Send Tones

of

is not

key is

main menu.

by pressing this key to

can be stored. Use the keypad to enter the store location

LOCAL

be

can

NO

Mod.

AM

<J?M

EXIT

Fig.

3-1-15

Calling Tones

Assigned Modulation: Total FM

Mode SINGLE

Control

Mode

“j

1 : SINGLE SHOT

2-9

10 : CONTINUOUS

:

Calling tones mode control menu

—

MULTIPLE 1

(with [FM] selected)

No. of

Repeats

FM1

FM2

Total

FM

C0047

3-1-24

46882-074C

]

Selecting

The

3-1-16.

Fig.

alternative tone

[Select Standard] key causes

CCIR

EURO

DZVEi

ZVEI1

ZVEI2

EXIT

Tone
Tone
Tone 2: 1.1970 kHz
Tone
Tone 4:
Tone
Tone 6: 1.5400
Tone 7:

standards

Tone Standard Selection

Current Standard CCIR

0: 1.9810 kHz Tone 8:

1.1240

1:

1.2750

3:

1.3580 kHz

5: 1.4460 kHz

1.6400 kHz Tone F:

Default

Tone Gap

the Tone Standard Selection Menu

Menu

6ms

1.7470 kHz

1.8600

9:

930.0 Hz

kHz

0 Hz

kHz Tone

Tone A: 2.0000 kHz

kHz Tone B:

Tone C: 2.2570 kHz
Tone D: 991.0 Hz

kHz Tone E: 2.1100 kHz

Duration : 100ms

:

to be displayed,

LOCAL

EEA

EIA

NATEL

USER1

USER2

DTMF

C0048

see

3-1-16

Fig.

The tone sequential standard

This menu also

User 1 and User 2 are user defined

softkey

(Option

Editing

(Fig.

defined tone

switch

standard must be saved

only appears on the display

001 fitted). If only

a tone standard

Pressing

3-1-13)

All editing

off. To ensure that

The editing facility

system

any). All other settings

and to set the default duration

shows the frequency and

single

a

the [Edit Standard

will produce the

system to be set up.

is carried out in

to non-volatile

are handled in the normal

Edit Sequential

the alterations are available

allows the user

Tone

standard

to be used

is

selection

selected

menu

by pressing the appropriate

timing characteristics for each

tone standards

the

if

instrument is fitted with a second

oscillator is fitted

key when in the Sequential

a tone standard called TEMP which

storage in either USER1 or USER2.

to define the frequency of each of

of each tone in the sequence

stored in non-volatile memory.

[DTMF]

the

key is left blank

Calling Tones Utility

Tones Utility, see Fig.

for future use the newly

3-1-17,

and the gap between

Sequential Tones Utility menu.

soft key.

tone in the standard.

The [DTMF]

modulation oscillator

menu

which

is not stored

allows a user

beyond

defined tone

the 16 tones in the

tones (if

The currently selected

the top left soft

start,

to

46882-074C 3-1-25

particularly when the user

key (shown [CCIR to TEMP]

tone standard may

be

in Fig.

defined system is similar to

copied into

3-1-17)

the TEMP working

and often

this is a convenient way

one of the standard

space using

systems.

[

]

]

]

To edit the system in TEMP use [Tone

edited

tone number. Select

[Next Tone

and then use

duration of

[Store to USER1

Changes to the default

(0

to

and after pressing

15)

and [Previous Tone

[Default

each tone and the gap between each tone.

Finally store the

or [Store to User2[.

]

Note that

when

CCIR

TEMP

to

Store

to USER1

Store

to USER2

Number] to

[Tone

Freq.J

other tones in the system

keys to step

Duration

user defined tone system parameters in USER1 or USER2 by pressing

and [Tone Gap] to set the times in milliseconds for the default

using the DTMF tone signalling capability no editing facility

settings are made directly on the Calling Tones Utility Menu.

enter the

means to the [Tone Number

by

through the list.

select the number

new

frequency to be assigned to this

of the tone to be

key or use the

Enter

frequencies of

the

is provided.

the tones

LOCAL

Edit Sequencia! Tones Standard

Tone Number:

Tone Frequency

Default

Tone

Duration

Gap

- -

Q

10.0

100

0

H2

ms

ms

:

:

:

Tone

Number

Tone

Freq.

Default

Duration

Tone

Gap

Next

Tone

EXIT

Fig.

3-1-17

Edit sequential

tones

Previous

Tone

C0049

standard menu

3-1-26

46882-074C

]

INCREMENTING

Displaying

Press the

shifts

(using A)

[Aj hard key. The total shift menu

menu displays the difference between

be incremented or decremented

control

press [Return Value]. This will restore

value, i.e. the indicated shift will

value

to the Sig Gen menu as the keyed in value.

knob'

on Page

Transfer

Value

Return

Value

3-1-10.

Carrier

Freq.

RF Level

by using the [IT] or [II] key or the control knob,

To cancel any changes

return to zero. Pressing

+

+

AM

Low Noise Mode 1

FM+

Set

Steps

Int F4+

the current

is

value

displayed

and the keyed-in

as

shown

in Fig.

value.

made by the rotary control or theft/U keys,

the setting of the selected parameter to the

Value] transfers

Hz

ON

LOCAL

Carrier

Freq.

Level

Shift

Int F4

Shift

ON/OFF

Q.O

[Transfer

n

u

dB

Modulation ENABLED

0

0

ON

Int Std: 10 MHz

Hz

Hz

3-1-18.

Parameters

see 'Using the

keyed-in

the current

RF

FM

FM

This

can

Setting increment values

Note-

(1)

(2)

From

step sizes.

Select [Carrier Step],

The

(3)

(4)

(5)

Return

Using the

frequency by the set value.

[RF Level Step],

way.

Wideband FM and pulse modulation

the total shift menu select

value will

step

the main

to

Ml

keys respectively

3-1-18

Fig.

enter the value on the key pad and press a terminator

appear on the screen.

Total

[Set Steps]. The screen shows the currently

shift

menu

menu by pressing [SIG GEN].

[AM Step

will now increment

and [Source

Step]

values

parameters cannot be incremented in

or decrement the carrier

can be entered in the same

C00050

set

key.

this manner.

46882-074C

3-1-27

SWEEP

—

The sweep capability allows the comprehensive testing of

single points will

function is specified by the following parameters:

•

•

•

•

value

Start

Stop value

Number

Time per step

necessarily

not

of steps

give an overall indication of the performance. The sweep

Up to five individually adjustable markers may be set. Each marker can

separately. Sweep functions available

•

Carrier frequency with or without modulation (available

in normal noise mode only)

•

RF level

•

Internal modulation rate

•

LF frequency (if in LF generator mode)

•

LF level

in LF generator

(if

The sweep can be operated in single shot or continuous

key

by a

time when the display will indicate the current parameter value. The sweep

oscilloscopes,

press, an external pulse or GPIB control. Once started, the sweep can be stopped

X-Y display

units

are:

mode).

modes with the start command triggered

and X-Y plotters by connecting the display unit

systems, as measurements at

be

SWEEP RAMP output on the rear panel.

turned

can be used with

on and off

input to the

X

at

any

sweep

A

Sweep

routine is

type

(1)

Sweep

Markers

Sweep

Mode

Sweep

set up

Press the

options, appears on the

Start

as describedinthe following

[SWEEP]

Level Start:

Level Stop:

Number of:

Steps

Step Time:

Sweep Status: WAITING FOR TRIGGER
Sweep Mode: INTERNAL SINGLE

Type

Sweep Type: RF LEVEL

paragraphs:

hard key. The sweep parameters display, with soft key

screen, see Fig.

3-1-19.

LOCAL

0.0

10.0

1000

50

dBm

dBm

-

ms

Start

RF Level

Stop

RF Level

Number

of Steps

Step

Time

Fig.

3-1-28

3-1-19

Sweep parameters

C0051

display

46882-074C

(2)

Press [Sweep Type]. The Sweep

Carrier

Sweep

RF Level

Sweep

Int.

F4

Current

Sweep Type: RF LEVEL

Sweep

Sweep

Off

EXIT

Fig.

Sweep Type

3-1-20

Sweep type menu

Type Menu is

Menu

displayed,

see Fig.

3-1-20.

LOCAL

Freq

LF

Sweep

LF Level

Sweep

C0052

The instrument must be in the LF generator

level sweep can

[Carrier Sweep] soft key

The

noise modes this key is not present.

Modulation

required during

initiated.

be

only appears in the normal noise mode. In the two low

sweep

should

sweep mode.

(3)

(4)

Select

Sweep]. The Sweep Type

Press [EXIT] or [SWEEP]

required sweep

the

type by pressing the appropriate soft key,

screen changes to

return

to

mode

before an LF

frequency sweep and LF

be entered before putting

to the

confirm

sweep parameters display.

the selection.

instrument

the

e.g.

in

Carrier

/

the

-074C

3-1-29

7

Sweep

mode

(1)

At the sweep parameters menu, press [Sweep Mode]. The

Menu is displayed, see

Internal

Single

Internal

Cont.

External

Trigger

EXIT

Current Sweep Mode: INTERNAL

Sweep Trigger Mode Menu

Fig.

3-1-21.

SINGLE

Sweep Trigger Mode

LOCAL

C001

(2)

(3)

(4)

Start value

(1)

(2)

Stop value

(1)

3-1-21

Fig.

Select the sweep mode, [Internal

Press [EXIT] to return

If [External trigger] is selected,
this

menu press

displayed. Then press [SWEEP]

Select the appropriate soft key to enter the start value,

Enter the required

[External

start value via the numerical key pad

Sweep trigger mode menu

Single

the sweep

to

parameters display menu.

press [UTIL], select [Utils. Menu

Trigger]. The External Trigger Selection Menu will

to return to

[Internal

],

the Sweep

terminator key.

Select the appropriate soft key to enter the

stop

value,

Cont], or [External Trigger],

and from

1]

be

Parameters display.

[Start Freq

e.g.

].

and the appropriate

e.g. [Stop Freq].

(2)

Enter the required stop value via the numerical key

terminator key.

3-1-30

pad and the appropriate

46882-074C

When

values

place, the sweep status line changes

earner frequency

together with any level and modulation correction factors. While

parameters

Number of steps

are entered, the instrument calculates all the individual

this process is taking

indicate

to

' CALCULATING SWEEP'.

step

(

1 )

(2)

Note...

If an inappropriate number of

more reasonable value. The number of steps available depends on the operating mode and

the maximum values are:

10,000 for RF level, RF modulation frequency, LF frequency and LF level.

Step

time

(

1 )

(2)

Markers

Select

/Number

of

Steps].

Enter the number of steps via the numerical

terminator

250 for

1,000 for earner frequency without

Select

Enter the step time via the

key.

key.

carrier

Step Time].

[

frequency with FM, OM or Wideband FM enabled.

steps is selected, the instrument will automatically choose a

FM, <hM or Wideband FM enabled.

numerical key

pad and the [GHz/V/enter]

key

pad and the [MHz/mV/ms] terminator

Fig.

A facility exists for producing

3-1-22.

Enable/

Disable

Marker

ON/OFF

EXIT

Markers : DISABLED

Marker

Marker 2:

Marker 3:

Marker 4:

Marker

markers, controlled by the Sweep Markers Menu

Sweep Markers menu

1:

2.0

4.0

6.0

8.0

5:

Fig.

10.0

3-1-22

dBm OFF

dBm OFF
dBm OFF

dBm OFF

dBm OFF

Markers

menu

LOCAL

Marker 1

Marker 2

Marker 3

Marker 4

Marker 5

C0461

see

,

46882-074C

3-1-31

To set a marker, press one of

value on the key pad and terminate with the appropriate units
using the [Marker ON/OFF] key.

key to activate the marker output on the rear panel. The

pulse

with

duration of one sweep step when the sweep passes a

a

the

marker soft

When all markers have been entered use the

keys e.g. [Marker

marker output produces a

Starting the sweep

enter the

3],

hard key. Turn the marker ON

[Enable/Disable]

required

positive going

marker value.

From the sweep parameters menu,

display changes

show the sweep progression, see Fig.

from WAITING FOR TRIGGER to SWEEPING and a

Stop

Sweep

Level Start:

Level Stop:

Number of:

Steps

Step Time:

Sweep Status:
Sweep Mode: INTERNAL
Sweep Type: RF

Fig.

3-1-23.

10.0

1000

SWEEPING

3-1-23

press

0.0

50

LEVEL

Sweep

Start Sweep]. The single

[

solid bar increments to

dBm

dBm

—

ms

H

SINGLE

in progress

sweep

LOCAL

status line

C0055

Note ...

When the sweep is in progress, all the hard keys are disabled and [Stop Sweep]

active

soft key.

Stopping the sweep

Press [Stop Sweep]. The
[Reset Sweep] to change the sweep parameters, or

[Continue Sweep] to

[Transfer] to transfer the current value of the

in the [SIG GEN] or

the paused state, the ft and ft keys can be used to step

then be

continued

[LF]

pressing [Continue Sweep],

by

sweep

continue the sweep, or

Gen]) mode, see Figs.

(/LF

and the menu presents the opportunity to press

stops

is the only

:-

swept parameter

3-1-24

the parameter up or down. The sweep can

and

3-1-25.

the last keyed in value

as

When the

sweep

is

in

3-1-32

46882-074C

LOCAL

Stop

Sweep

Reset

Sweep

Transfer

Low

intermod

Level

Start:

Level

Stop:

Number of:

Steps

Step Time:

1000

Sweep Status: PAUSED
Sweep Mode: INTERNAL
Sweep Type: RF LEVEL

3-1-24

Fig.

Carrier

Freq.

RF Level

:

626.407 6800

:

6.4

0.0

10.0

50

Sweep stopped

dBm

dBm

dBm

ms

AT 6.4 dBm

SINGLE

ON

MHz

LOCAL

Carrier

Freq.

Wideband

FM

Low Noise

Mode 1 Modulation

FM:

Int

F4: 1.0000 kHz

3-1-25

Fig.

3.50

RF level transferred

Int Std: 10 MHz

ENABLED

kHz

ON

EX2

ON/OFF

Source

46882-074C

UTILITIES

The utilities options are accessible from two primary menus, Utilities Selection Menu 1

and Utilities Selection Menu 2. When

[UTIL]

selection is made and then one of the other hard keys

subsequently once returns

provides an operating short-cut in that it allows a sub-menu to

having

DATE]

shown in Fig.

[Utils. Menu

is subsequently pressed, the primary menu is re-displayed. However, if instead a

to the sub-menu, pressing it again returns to the primary menu. This

to go

again through

soft key

2].

the primary menu. This scheme does not apply to the [TIME

or

to the [Sig Gen] hard key. The display for Utilities Selection Menu 1 is

3-1-26.

To obtain Utilities

a selection is made from either of these menus and

[SWEEP] is pressed, pressing [UTIL]

e.g.

Selection Menu 2 from the menu, press

re-accessed without

be

LOCAL

first

&

Display

Adjust

Hardware

Status

Software

Status

External

Trigger

Time &

Date

Utils.

Menu 2

Fig.

Adjusting

the

display

To adjust the display, press [Display

the screen, see Fig.

be toggled ON or OFF using the

by [Dim], [Medium

3-1-27.

[Medium

1],

The backlight, which is on when the instrument is switched ON,

Once adjusted, the LCD setting

LCD

Setting].

The

instrument always activates the backlighting whenever it

Utilities selection menu 1

3-1-26

[Display

2]

can be stored in the the

Utilities selection menu 1

Adjust

On/Off]

The Display Adjust menu is displayed on

/.

key, and when ON can be

and [Bright]. Contrast is adjusted with the control

non-volatile

memory by pressing [Save

is

Mod’n.

Mode

GPIB

Address

Calling

Tones

Carrier

Phase

Int/Ext

Standard

Noise

Mode

varied

switched

C0058

can

in brightness

knob.

on.

3-1-34

46882-074C

]

LOCAL

]

Save LCD

Setting

Fig.

Hardware information

To obtain

following information is displayed:

description of

a

Display

ON/OFF

Dim

ttBWWi

Medium 1

Use Knob to Adjust Contrast

Medium

vv.w.w

2

Bright

I

C0059

3-1-27

the instrument hardware, press [Hardware Status] and the

Display adjust menu

Instrument type

Serial no. (e.g. 1543256/045)

Options fitted (e.g.

Attenuator type and serial number.

For attenuator calibration information,

2041

(e.g.

)

SECOND LF OSC.)

refer to the

Service

Software information

To obtain

following

External trigger

initiate

The display changes to show the External Trigger

options:

information is displayed:

Software version

Part number e.g.

GPIB address

The external trigger facility allows

a defined change in the generator setting. To define the function press [External Trigger

[Sweep Start
[Sweep Step]

[Send Seq Tones]

[Recall
[Recall Down]

[No Ext. Trigger]

description of

a

Up]

the instrument software, press

number e.g. 2.008

44533-366

e.g. 07

the rear panel TRIGGER input to be set up so as to

Starts the external sweep.

Goes to next step of external sweep.

Equivalent to [Send Tones] on

Recall

Recall previous store.

Trigger ignored (default).

Manual.

[Software Status

Selection Menu which has the following

main menu.

next store.

and

the

].

A switch closure or voltage

initiates the trigger action.

46882-074C 3-1-35

transition from +5 V to 0 V applied to the rear panel socket

]

Setting the modulation mode

Modulation mode selection allows

modulated by one, two or four

Press [Mod'n Mode] to display

modulation required

'Modulation mode selection'.

Setting the

Press [GPIB

address, enter the address, in the range

data is then saved automatically

instrument via

Sequential

Sequential calling tones are

pressing

the GPIB, refer to Chapter

calling tones

Send Tones] which appears on the main menu after

[

by pressing [Single], [Dual],

GPIB address

Address] to display the GPIB Address Change

internal

(2

in the non-volatile memory. For information

set up from a utility menu, Fig.

Tones] also appears on the calling tones

Selection Menu 1

calls up the Sequential Calling Tones

the generator to be configured to

provide

and 2 external) modulation sources.

the Modulation Mode Selection Menu, choose the

[Comp]

or [Dual Comp[

see Page

Menu. To change the

via

0-30,

the numerical key pad and press [enter].

on operating the

3-2.

3-1-26,

the tones have been set up. [Send

menu. Pressing the [Calling Tones] soft key

Utility

menu,

see 'SIGNALLING'.

and are

activated by

at Utilities

carriers

type of

3-1-19,

The

Carrier phase

Pressing

the carrier phase

rotate the

control knob clockwise to advance

Selection

Pressing [Int/Ext Standard] changes

Selection Menu which

10

adjustment

Carrier Phase

[

(with

of frequency standard

has the

I

MHz Int. Std.

5

1

MHz

MHz
MHz

Int. Std.
Int.

Ext. Std.

5 MHz Ext. Std.

] 0

If the internal standard is selected, it is available

the rear panel. Selecting

external

source at that frequency. These settings are saved

MHz

Ext. Std.

displays

respect to its current

following

Std.

the Carrier Phase Control Menu.

phase) in steps of ti/ 128 radians, approximately

the phase and counter-clockwise

the menu to display the Frequency

options:

as an output at the selected frequency

an external option enables the instrument

in the non-volatile memory.

advance

To

to retard the phase.

or retard

1.4°,

Standard

on

to accept a standard from an

3-1-36

46882-074C

Noise mode selection

The 2040 series of signal generators

(low noise mode 1 and low

residual

FM

whilst

the normal noise mode allows

of modulation capabilities. The

Low noise

capability and

sweep

relatively low modulating frequencies are

mode

In this mode the 2040 series offer the lowest level

capability is not provided. This mode is suitable

reduced

a

1

noise mode

capabilities of the different modes are as follows:

AM bandwidth. Phase modulation is not available and

Low noise mode 2

Compared with low noise mode

slightly higher level

with

good noise performance.

Normal noise

In the normal mode the 2040 series offer a level

series. Full FM, OM and AM capabilities

implemented.

of noise. This mode should be used when full AM performance

mode

have three noise modes. The two low noise modes

provide the lowest levels

2)

the instrument to operate

SSB phase noise

of

with

the

widest

of noise with a restricted FM deviation

the carrier

for a wide range of applications where

used.

noise

1

,

mode

provides a wider AM bandwidth with a

2

is required

of performance equivalent to the 2030

are available and the full range

sweep facilities are

of

and

range

Low Noise Mode

Low Noise Mode

Normal Noise Mode

Fig.

Press the [Noise Mode] soft key on the

Selection Menu press

the

relevant

Noise

Mode Selection Menu

(Reduced AM BA/V)

1

(Normal

2

3-1-28

soft key to select the desired operating mode.

Noise mode

AM B/W)

selection menu

Utilities Selection Menu 1 and in the Noise Mode

LOCAL

Noise

Mode 1

Noise

Mode 2

Normal

Mode

C0060

46882-074C

3-1-37

Selection menu 2

Press [Utils Menu

Utilities Selection Menu

Utilities

will only be usable in a read only mode.

The procedure

on this menu

the

If

instrument is locked, the appropriate level must be unlocked otherwise

is:

[UTIL]

=> [Utils. Menu

[Unlock Level

have

1]

from Utilities

2]

see Fig.

2,

either 1st or 2nd level

Selection Menu 1. The display

3-1-29.

This menu allows access to the protected

To change parameters, the function must be unlocked.

[Lock & Unlock] => Function Unlocking Utility

=>

2]

or, for servicing, [Unlock Level

The correct password must be entered. Many of these activities

servicing and are described in the Service Manual.

Cal.

Value

Latch

Data

Elapsed

Time

Time

Set

Date

&

Utilities Selection Menu 2

protection.

2].

now

changes to show

data.

the utility

menu

are intended for use in

=>

LOCAL

Display

Blanking

Power Up

Options

Level

Units

RF Level

Utility

Lock &

Unlock

Utils.

Menu 1

3-1-29

Fig.

Calibration

Pressing [Cal Value] brings the Calibration

3-1-30.

Fig.

calibration check is due. It also shows the

possible

unless the protection facility is unlocked

found in the Service

This menu shows when

inspect

to

the calibration value of these items but calibration

Manual.

the last complete check was made and when the

Utilities selection menu

Utilities Menu to the display,

on which

date

at

Level 2.

the individual items

Full details regarding calibration can be

C0939

2

see

next

were

adjusted. It is

cannot

be

carried out

3-1-38

46882-074C

J

LOCAL

Latch

data

The latch

latches within

Low

Noise

Path

/

Modulation Adjusted

FM

Tracking Adjusted

RF Level Adjusted

Freq Standard Adjusted

Last Complete Check :

Next Cal. Check

3-1-30

Fig.

data menu is intended for

the instrument. For further

Calibration Utilities Menu

Src

Gain Adjusted

Due :

Calibration utilities menu

1990-03-30
1990-03-30
1990-03-30
1990-03-30
1990-03-30

1990-03-30
1992-03-30

use as a diagnostic aid by allowing data

information consult the Service

Source/

Path

Mod'n.

FM

Selfcal

RF

Level

Int. Freq

Standard

C0062

to be sent to

Manual.

Elapsed

time

The elapsed time facility

last reset.

the function was last

reliability and

Setting time

date by pressing

time, date

Pressing [Elapsed Time] displays

to

set

zero. This facility

utilisation.

and date

Unlock to

and day of the week. The

Level

Set Time

/

(see 'Selection

1

& Date] at Utilities

powered by a rear panel battery,

[Set Time] Press

minutes

Terminate the

[Set

Date

year, month and

23.

Terminate the entry by [enter].

hour clock).

(24

entry by [enter] which starts

Press this key

when the date is

this key to set

day. Separate the year, month and

set.

Looking and unlocking

displays the number

the number of operating hours

operating hours

of

since the function was

and the date

can be used to assess the instrument's operational

menu

2'

and 'Locking and unlocking').

Selection Menu 2. The screen shows the current

time shown does not change during display. The

see Chap.

Separate the hour and minutes fields

to set the date (in ISO format). Using

'BATTERY

2,

the time. Using the keypad enter the hour and

REPLACEMENT'.

by a

the clock.

day fields by a hyphen e.g.

The day of the week is automatically

on which

Set the time and

clock is

hyphen,

the keypad enter the

21-30.

e.g.

1992-04-

determined

Press [Lock

three soft keys:

Unlock].

&

Unlock Level 1
Unlock

Serial No. Set

46882-074C 3-1-39

Level 2

When Level 1 and Level

2 are both locked, the menu displays

]

]

Press [Unlock Level

display. Level 1 is unlocked by entering the 4 digits on the key

menu

left-hand side. The default

instrument, the password has been changed by your

will

change and

should be consulted for

to the Service Manual for details.

Refer

1]

two soft keys, [

password

further information.

and

the

message

Lock

is 1234. If this

Enter 4 Digit Password: will appear on

Level

and [Lock Keyboard

1]

password is not recognised by the

calibration/repair department personnel who

[Unlock

Level

2]

Keyboard locking

Unlock to

operation is disabled by

Level

see 'Selection Menu

1,

pressing [Lock Keyboard]. The instrument

main menu which indicates the locked status by

comer

1 using the keypad and

of

display. The keyboard can be re-enabled by entering

the

pressing [enter]. The keyboard status is saved in the

memory.

Display blanking

To prevent

a display blanking facility.

dashes so that

instrument must be unlocked to Level

Manual

for further

sensitive data from being displayed, the 2040 series Signal

allows various parts of

This

values entered

information.

the user or recalled from the memory

by

2

2'

enable or disable this facility. Consult the Service

to

'Locking and Unlocking' above. Keyboard

and

displaying a key-shaped icon in the top left-hand

the display to be replaced by a series of

pad and pressing [enter]. The

will appear on the

J,

is only used

automatically returns

the 4 digit password for Level

will

during servicing.

to

non-volatile

Generators

not be

include

visible. The

the

the

Power up options

Unlock to

options

options are [Factory] and

recalled. Pressing [Memory] causes [Memory Number] to

are available

menu. To change the

Level

by

power

1,

pressing [Power Up Options

[Memory]. When [

'Selection

see

state of the instrument

up

Menu

number of the full store on the key pad and press [enter].

2'

Factory

and 'Locking and unlocking’

pressed, the factory set

is

to

RF level units

RF output

entered as an

(dBmV),

[Level Units]

Level 1. This causes an additional

Select
the default units.

microvolts (dBpV)

To change

the required RF level units and press the additional [Save

level

units can be altered using the [Level

EMF or PD, and the logarithmic units can be referred to

or to 1

which displays the RF Level Units Selection Menu shown in Fig.

the default RF level units shown at switch on, first

milliwatt

soft key

into 50

displayed in the top left box (see Fig.

to be

above. Two

Utilities Selection Menu 2. These

at

appear

a particular setting,

Units] key. The

the right-hand side of the

at

volts (dBV), millivolts

power

enter

level

up state is

memory

the

units may be

Q(dBm). Select the units by pressing

3-1-31.

unlock the instrument

RF Units] key

save these

to

to

3-1-31).

as

3-1-40

46882-074C

Fig.

3-1-31

]

RF level units selection menu ( shown unlocked to level

C0330

1)

LF level units

LF level logarithmic units may be referenced

EMF (dBmV EMF) or 1 milliwatt into 600

Select the units

Menu which

calls up the LF Level

To change

Level

Select the

the default units.

1. This causes an additional soft

required LF

the default

pressing the

by

Units

level

LF

level units and

[LF Level Units] soft key on the RF Level Units Selection

Selection Menu shown in Fig.

units shown at switch on, first unlock the instrument to

key to be displayed in the top left box (see Fig.

press the additional [Save LF Units

volt EMF (dBV EMF),

to 1

(dBm). Linear units are always set EMF

Q

3-1-32.

key to save these as

millivolt

1

values.

3-1-32).

3-1-32

Fig.

46882-074C

LF level units selection

menu (shown unlocked to level

C0328

1)

3-1-41

RF level utility

Selecting

Utility Menu shown in Fig.

Extended

[RF Level Utility] from the Utilities Selection Menu 2 displays the RF Level

Over-

range

3-1-33.

RF Level

Extended Hysteresis

Overrange Control : ENABLED

3-1-33

Fig.

Utility Menu

ENABLED

:

RF

level utility menu

LOCAL

Offsets

C0938

Extended hysteresis

Pressing the [Extended] soft key toggles

hysteresis. When enabled, this provides an electronic level

converter,

This increases the electronic level control

message

rather than the attenuators, to provide

from ±7 dB to

is displayed on the Sig Gen menu to indicate

During normal operation the RF output is controlled

electronically controlling the output level over

dBm) and switching

When

signal generator sets the

and used to adjust the

increased, the attenuator change is suppressed

displayed. Similarly, when

the hysteresis function is enabled and

in 6 dB attenuator pads to provide lower RF levels.

level

in the normal way.

RF level,

the normal attenuator changes are suppressed. When

for 6 dB above the normal range and +HYST

the level is reduced attenuator changes

below the normal range and -HYST is displayed.

exceeded

operation of the generator. An example of extended

the attenuator and the electronic control are reset to values corresponding

With the rotary control in use in the hysteresis

instructed

to set the RF

This is a useful facility if the user is investigating squelch

varying the level around

level

to the same

the current value will not result in an attenuator change.

value,

the status

uninterrupted

an

when

a limited range (normally approximately 0 to +6

keyboard

a

However, when the rotary control is enabled

When the extended hysteresis range is

hysteresis operation is shown in Fig.

range of operation, the generator can be

but set using the [V], [mV],

(Enable/Disable)

function

+12

in hysteris and

which

-18

to

as

entry of

(glitch-free)

dB. A +HYST or -HYST

shown

are suppressed for 12 dB

uses the internal D/A

which

in

the RF level

of extended

level

direction.

in Fig.

to the normal

control.

3-1-34

is made, the

the

3-1-35.

[pV] or [dB] keys.

systems and wants to ensure that

level

by

is

is

3-1-42

46882-074C

Fig.

3-1-34

Normal signal generator level control operation

3-1-35

Fig.

Note...

In the

this will affect some performance aspects. AM distortion and

With no

Extended hysteresis operation with an RF level

hysteresis range the RF level is set in a different way to the normal operation

AM selected, the effect on RF accuracy in the +HYST region will be relatively

minor. But the effect in the -HYST region on RF level accuracy will

46882-074C

-HYST

displayed

H

of

HYST

displayed

-9 dBm as the starting

level

and

be

will

more

be affected.

significant.

3-1-43

accuracy

vi i— i *r\

i i

Overrange

Pressing the [Over-range] soft key toggles the status

control. When enabled, the maximum RF

(subject to instrument capability). This increases the maximum

output

power is extended by an additional 6 dB

(Enable/Disable) of the overrange

output power from +13 to +19

dBm for the standard instrument and from +19 to +25 dBm for an instrument

003. If the requested output

the Sig Gen menu.

Note...

If the

overrange

facility is enabled the

higher signal levels. If the generator is set to a frequency

RF output is not terminated in

signal. If this happens the RPP can only be rest if a 50 Q

OUTPUT socket.

RF

level

is in the

overrange region the UNCAL message is displayed on

signal generator is capable of generating much

below 21

50 Q then the RPP may be tripped by the internal RF

termination is connected

RF offset

[Offsets]

With the instrument unlocked to

Level

1,

produces the layout for the soft keys shown in Fig.

Save

Offset

Enable/

Disable

Offset

Carrier

Feq.

RF Level

:

1 050.000 000

:

-102.0

ON/OFF

Offsets: DISABLED

'Locking and unlocking’ above, pressing

see

3-1-36.

MHz

ON

fitted with

Option

.09375 MHz and the

the

to

LOCAL

Carrier

Freq.

Offset

Vaiue

Offset (675MHz

3-]

Fig.

compensate for

To

that they give identical measurements, the RF output level can be offset

done by selecting [

the control knob. A separate offset can be set for the carrier

337.5 MHz

[Offset

Note...

and

ON/OFF] key or all offsets can be turned on or off

Offset

each

cable or

Value]

and

octave above this. Offsets can be turned on or off

This facility is replaced by a more

RF profiles and complex sweep. The facility is described in Chap. 1 under ’Options’.

008,

-

1

-36 RF

,35GHz)

offset

:

Q,0

adjustment menu

switching losses or

either keying in the value or making the adjustment with

dB OFF

standardize a group of instruments so

to

frequency range

via

versatile system on generators supplied with Option

[Enable/Disable] key.

the

Cl

029

by up to ±2 dB.

10 kHz to

individually

This is

using the

3-1-44

46882-074C

LOW FREQUENCY OPERATION

The instrument has

modulation signal monitor or as an independent low

either the LF Monitor

selected.

two

modes of LF operation. The LF output can be

Menu or the LF Generator Menu

LF monitor

The left-hand side of the LF Monitor Menu, varies

single,

single soft key, [LF Gen.].

composite, dual or dual composite. In each case the right-hand side is occupied

TABLE

LIST OF AVAILABLE

Single Composite Dual

Mod. Drive

Mod. Source

SOFTKEYS FOR

Mod.

Drive

Mod. 1 Source
Mod. 2 Source

3-1-1

AM
AM Source

FM/OM Drive

FM/OM Source

frequency

depending on which mode was last

,

according to the modulation mode;

DIFFERENT

Drive

either

used

generator.

Pressing [LF] displays

MODULATION MODES

Dual Composite

AM Drive
AM 1 Source
AM 2 Source

FM/OM Drive
FM/OM 1 Source
FM/OM 2 Source

as a

by a

Modulation source monitoring

Internal sources only may be monitored.

appropriate

modulating signal output

key. The

source monitor level

and the source information appeal' on the display. The

fed to the LF OUTPUT

is

To monitor a

socket at a

modulating

fixed level

signal source, press the

of 1 V.

Modulation drive monitoring

Modulation drive

signals from both internal and external sources.

appropriate key. The LF

When the summed

channels is fed to the LF OUTPUT socket, if in

level function controls the

depends on the modulation depth. If AM is turned off, the associated LF output is removed.

The

summed FM/OM drive signal is also fed to the LF OUTPUT socket. The signal

the sum of both FM/OM channels. The FM drive signal

but varies over

a

range

depending on the set modulation and the carrier frequency selected. If FM/OM is

LF signal is removed. If one component of

component

which is left on remains at its original level.

monitoring is intended for the user to monitor complex modulating

To monitor a

monitor level and the selected drive are displayed.

modulation drive,

press the

AM drive signal is selected, a signal which is the sum of both AM

composite or dual

output

approximately

of

a

level

at 100% depth, therefore the actual output voltage

the monitored

at

3 dB (except at

a composite modulation setting is turned off, the

deviation

composite mode. The LF

point is nominally 1 V

values below about 1 kHz)

turned off, the

is

Note...

Wideband FM and pulse modulating signals are not accessible via

46882-074C

the monitor mode.

3-1-45

]

Use as an independent LF generator

To

use the instrument as an independent

Monitor Menu. The LF Generator Menu

appears on the display as shown in Fig.

LF generator, select [LF Gen.] at the LF

3-1-37.

LOCAL

Sine

Wave

Triangle

Wave

LF

Step

LF

A

In

this mode, one internal oscillator must

if only one

the LF generator is in

generator.

oscillator is fitted, no internal modulation

LF Freq :

LF

Level :

use. If

LF Generator Menu

FV

kHz

emf

CS2

ON

LF generator menu

be used

exclusively

available

is

for this task. Consequently

the

to

signal generator while

1.0000

100

3-1-37

Fig.

a

second oscillator is fitted, only one is available

LF

Freq.

LF

Level

LF

Monitor

C0462

the signal

to

LF frequency

value via

the numerical keypad and

LF Step Menu. [Freq.

display

Note...

the LF Total

To regain the oscillator as a

The LF

voltage

a fixed

output is entered as V/mV/jLV or dBm/dBV/dBmV

fed to a high impedance,

resolution of 0.1 dB.

and LF

Step] or [Level Step

Shift

level

are adjusted

Menu, press

pressing [enter]. To set step

modulation source, select the monitor mode.

by pressing

can

be

selected and the values entered

the appropriate

values,

press [LF

key and entering the

[LF A/.

representing the open circuit

but the steps are entered in dB and the control

for

Step]

as before. To

the

knob has

3-1-46

46882-074C

MEMORY

Memory recall

J

Pressing the

3-1-38,

Fig.

sweep.

stores. This

[Inhibit ON/OFF]

display.

to

be

Provision

allows

Memory

Store

Inhibit

ON/OFF

Return

[MEM] hard key after switch

displayed.

is made

one carrier frequency

turns the option ON and OFF.

There are four types of

for an option not to recall the carrier frequency for full

to be used with a series of stored settings.

Memory Recall Menu

Full

Store Number :

Inhibit Carrier Recall

Store

Protect

on, causes the Memory Recall Menu,

recall, full,

partial,

carrier frequency

and partial

Pressing

The state of the option is indicated on

LOCAL

Full

Recall

Partial

Recall

Carrier

Recall

Sweep

Recall

OFF

:

: OFF

and

the

3-1-38

Fig.

Full

recall

Selecting [Full Recall

frequency, RF level,

recalled are all 6 modulation

Generator/Monitor

frequency setting.

(numbered 0 to

modulations and their increments, ON/OFF and

setting. [Inhibit

The state of the option is indicated

for full recall. A further location

49)

be recalled. The factory default

enables

oscillator frequencies, plus one increment,

settings are listed in Table

Partial recall

This is a less comprehensive

recall of only those parameters which

RF output; carrier frequency, RF level,

source

option not

for partial storage.

information and the two modulation oscillator

recall

to

the carrier frequency is provided. There are

C0940

Memory recall menu

the recall of a complete instrument setting, i.e.

source information. Also

and the LF

ON/OFF] provides the option not to recall the

on the display. There are 50 locations

allows the

(50)

3-2-1.

modulations in use (without increments),

frequencies in use. As with full

50 locations (numbered

factory default settings to

currently affect the

ON/OFF and

carrier

carrier

store, the

to

0

49)

46882-074C

3-1-47

Carrier recall

]

when

The carrier frequency store

required.

has 100 locations (numbered 0 to

Sweep recall

sweep

The

parameters which may be recalled when required.

Note-

Sweep parameters can be recalled whether the instrument is in sweep

are only used when sweep is

Recalling data

To recall data, press the soft key for the type of recall required,

select the location by means of the key pad. The

locations. Pressing

Stores

socket (see ’External

store has

[Return] recalls the location last specified on the numerical key

can be

incremented

trigger'

20 locations (numbered 0 to

selected.

or decremented externally by means of the SWEEP TRIGGER

above).

which may be recalled

99)

containing complete sets of sweep

19)

mode or not. They

[Carrier

e.g.

and

ft

keys can

ft

be used to recall the next

Recall

pad.

and

Note...

The settings for the sequential calling tones

UTILITIES, see Fig.

3-1-26.

These

stores can be erased from the Store Erase Menu.

Inhibit ON/OFF

When recalling

frequency setting to remain and not be replaced

facility offers this

the [Inhibit ON/OFF] key to set the

allow

To

set the Inhibit Carrier

the carrier frequency

full or partial stores it is sometimes useful for the existing

capability. To

Recall annunciator to OFF.

prevent

Inhibit

setting to be

the current earner frequency from being replaced

Carrier

Memory stepping facility

The [Sig Gen] key has a toggle action in

Memory Stepping menu shown in Fig.

and down from

settings for each location.

a start location (selected using the Memory Recall Menu), whilst displaying

3-1-39.

are recalled via the calling tones menu in

carrier

by the stored setting. The Inhibit Carrier Recall

use

Recall annunciator to ON.

overwritten

pressing

that

This facility enables the memory to be stepped up

use the [Inhibit ON/OFF] key

the key a second time displays the

the

to

3-1-48

46882-074C

FULL

48

]

LOCAL

Pressing [Memory

memory

at the

decrementing

'External

location. With each step the settings stored in the

top

trigger' above). Pressing [Memory

“

RF Level :

Single Modulation Mode

left

of screen, the memory type and location e.g.

can also be done externally

:

2 700.000

-144.0

FM

Int F4 : 1.0000 kHz

3-1-39

Fig.

dBm

0

Memory stepping menu

Up] or [Memory Down

by means of the SWEEP TRIGGER socket

Return] at any time returns to the start location.

0000

Modulation

respectively increments or

MHz

ON

Int Std: 10 MHz

ENABLED

Hz

0N

ES3

location are displayed together with,

Full 48. Incrementing and

Memory

UP

Memory

Down

Memory

Return

Cl 030

decrements the

(see

When a limit is reached, e.g. for Full

the start

limit will cause the

alternately displayed. To

Bottom

location. But note that if the start location

and start

limit

make the user aware of this situation, the message At Top

Limit is displayed at the top centre of

Memory store

Pressing

displayed. There are four types

To prevent the

provided. If this feature is

store key

Note...

legends at the right of the screen will not appear.

Sequential

menu. There is provision for storing up

the [Memory Store] soft key

accidental overwriting of memory contents,

enabled, the screen legend will indicate Store Protect:

calling tone sequences can be stored from the Sequential

Recall locations 0

coincides

locations (in this case the same numbered locations) to

screen.

causes the Memory Store Menu

of store, full, partial, carrier frequency and sweep.

20

to

tone sequences.

and

with

a further step will reset to

49,

a limit, trying to step past that

Fig.

,

a store protection facility is

Calling Tones Utility

Limit or At

3-1-40,

to

ON and the

be

be

46882-074C

3-1-49

]

LOCAL

Full

Memory

Store Menu

Store

Partial

Store

Carrier

Store

Carrier Store Number

3-1-40

Fig.

Full store

Selecting [Full Store

frequency, RF level, modulations and their

stored

Monitor setting.

(50)

factory default settings

all

are

holds the

modulation oscillator frequencies,

6

There

factory

are 50 locations (numbered

default settings. This memory cannot be

are

A Full Store contains the

Carrier frequency setting
Carrier frequency step size

level

RF

setting

enables the storage of a complete instrument setting, i.e.

listed in Table

following

RF level step size

All modulation settings

All modulation step sizes

Modulation mode

All six internal oscillator frequency settings

The modulation

and status

frequency step

LF generator frequency setting
LF generator frequency step

LF generator level setting
LF generator

level

step

size

LF monitor settings

Display blanking settings

:

Q

Sweep

Store

C0941

Memory store menu

increments, ON/OFF and source information. Also

one increment, and the LF Generator

plus

location

3-2-1.

information:

size

size

0 to

for full storage. A further

49)

written

to by the user.

carrier

The

Partial store

This is a less comprehensive store of only those

output; carrier frequency, RF level, modulations in use

source information and the

(numbered 0

3-1-50

to

for partial storage.

49)

two

modulation

parameters which currently

(without increments), ON/OFF and

oscillator frequencies in use. There are 50 locations

affect the

RF

46882-074C

A Partial Store contains the following information:

Carrier frequency setting

RF

The active modulation

Modulation mode

The frequency of the active modulation frequencies

Either the LF generator

(depending

Carrier store

level

]

setting

settings

and status

frequency and level setting or the LF monitor setting

on which mode is selected)

The carrier frequency store has 100 locations

carrier frequency only. This store can be used in conjunction with the full and

apply

a set

of

conditions

test

to a range of frequencies.

(numbered 0 to

for the storage of

99)

Sweep store

The sweep

sweep parameters.

Note-

Sweep

are

parameters can be stored whether

used when sweep

only

Storing data

To store data, press the soft key for

define a store location via the numerical

Note...

The settings for the sequential

UTILITIES,

store

see

has

20 locations (numbered 0 to

selected.

is

the type of

key pad, then press [enter].

calling tones are stored

3-1-26.

Fig.

These stores can

instrument

the

for the storage of complete

19)

in sweep

is

store

required, e.g. [Partial Store] and

via

the calling tones menu in

erased from the Store Erase Menu.

be

mode

partial stores to

sets of

or

not. They

Store erase

Unlock to Level 1. Pressing [Store Erase

screen.

relevant key and

Frequency

The

frequency stores and a sequence of up to 1024 hops may

hops can also

46882-074C

The opportunity to erase all the stores of a given type is available

pressing [Erase].

then

hopping

Carrier frequency hopping is a GPIB

instrument can be instructed to hop between any of the frequencies contained

entered

be

.

causes the Store Erase Menu to appear on the

by pressing the

operation only available in the normal noise mode.

in the carrier

be entered. The time interval between

3-1-51

Before executing

carrier frequency

commands

-

stores

a earner hopping sequence,

(0

-

99).

This can

achieved via

be

the frequencies must be loaded into the

the GPIB using the following

To enter the frequency

This will

cause the screen as shown in Fig.

Step Time:

Sweep Status: WAITING FOR TRIGGER
Sweep Mode: INTERNAL SINGLE

Sweep Type: CARRIER HOPPING

CFRQ <

frequency value

>

STO:CFRQ < store number >

hopping mode, enter the following GPIB commands

IMODE SWEEPER

SWEEP-.TYPE HOP

3-1-41

GPIB OPERATION

5Q

ms

to appear on the signal

ONLY !!!

REMOTE

Go

Local

-

generator

To

-

To load in

where

frequency store

a sequence, the

<n0>-<n4>

which

at

determined by the amount

The other parameter

steps. This

is done using the command

where

t represents the number of milliseconds.

The 100 frequencies

GPIB

command

-

3-1-41

Fig.

following

are numeric values

the necessary

Frequency hopping menu

command

HOPSEQ

<n0>,<n1>,<n2>,<n3>,<n4>

frequency is stored. The hopping

of numbers entered.

that can be set to control

-

SWEEP:HOP:TIME <

are precalculated

and loaded into a software sweep table

SWEEP:CALC

is used

in the range 0

the hopping sequence is the time

>

t

-

-

99 corresponding to the

sequence length

C0067

carrier

is

between

using the

3-1-52

46882-074C

Note:...

If any of the carrier frequency
error, the

following

message will appear in the centre of the screen

stores have become corrupt and so result in a checksum

-

CARRIER STORE <x> CORRUPTED.

-

RE

ENTER FREQUENCY.

where

With the frequencies,

in the same manner as the ordinary sweeps by using the following commands

is

x

the corrupted store number.

sequence and step time loaded, the hopping operation is controlled

SWEEP:GO

SWEEP:HALT

SWEEP:UP

SWEEP:DN

SWEEP:CONT

SWEEP:RESET

starts the hopping

precalculation if required).

pause

the hopping

go up to the next

sequence (and

sequence.

while

step

paused.

go down to previous step while paused.

continue hopping sequence.

reset sequence to start value.

-

will

do any

When

Note...

There are no markers

main parameter

To enter a new sequence use the HOPSEQ command

the beginning

e.g.

To add to an existing sequence use the HOPSEQ command

of the string.

e.g. existing sequence

paused

the carrier store

available

not permitted.

is

of the string.

existing sequence

sequence required

send GPIB command

sequence required

number is displayed on the screen.

and the operation of transferring the paused value

the

-

0, 6, 53, 72, 43,

-

22, 16, 7, 41, 59,

-

HOPSEQ

-

12, 24,

-

12, 24, 36, 48,

but

96

66

255,22,16,7,41,59,66

36, 48

84

72,

60,

number 255 is inserted at

without

255 at the

to the

beginning

send GPIB command

46882-074C

-

HOPSEQ

60,72,84

3-1-53

To determine

the length of the hopping sequence the

HOPSEQ?

following

GPIB command is used

-

This returns a

Like other sweep settings the frequency hopping mode

by using the following commands

For externally triggered operation

another sweep

value

single sweep (internal trigger),

continuous sweep

external sweep (external trigger)

SWEEP:MODE

-

1

1 024,

(internal trigger) or

SNGL

-

SWEEP:MODE CONT
SWEEP:MODE

function.

EXT

the trigger facility can be used in the same manner as

can be set

to

-

3-1-54

46882-074C

ERROR HANDLING

Errors may be

divided

into three groups

background errors which represent

when

only

the unit is being controlled by a GPIB controller.

a condition of the instrument and GPIB errors

-

foreground errors generally caused by a user,

Foreground errors

Attempts to set the instrument to a parameter value

generation of

For example, trying

results in the message Carrier Outside Limits being displayed at the

Foreground errors

an error message.

to

are

select

cleared

carrier

a

automatically when a correct entry is made by the user.

frequency above or below the specified range

outside its

Background errors

An incorrect operating

condition

message to warn the operator. For example,

message hit. Standard Failure

will

be displayed at the top of the screen.

GPIB errors

within the instrument automatically generates

the

if

internal frequency standard should

known

of the screen.

top

which

range result in the

an

fail

occur

error

the

Errors caused by

generate

also

Error display

Errors

error is present an internal priority ordering algorithm determines which

Error display

Service Request if the relevant

a

-

Front panel

are displayed as a single line of text at the top of the screen. If more than one

-

GPIB

incorrect

When an error occurs, its

removed from the queue

the error at the head of the

When the queue

The

is full the last error number is replaced with 255 so that the

255 to

will also be set (one of <cmd>, <exe>, <dde> or <qye>). Many background errors are also

reported in the Hardware and Coupling Status Registers.

indicate a full

In addition to the

contains

error queue has a capacity of 100 error numbers. If an error occurs while the queue

when

an error entry, a bit (<erb>) on the status byte is

queue.

error

programming

are

status registers are set.

number is entered into the Error Queue. Errors are not

they are cleared, but only

queue,

An

or

empty

queue entry, the

the

by

queue

*CLS command which clears the

returns a value of 0 following an ERROR? query.

appropriate bit in the Standard Event Register

displayed at the top

the ERROR? query, which

by

of the screen

error is

set.

ERROR? query returns a

For the above registers see Chap.

and may

displayed.

whole

returns

queue.

value

3-2.

of

46882-074C

3-1-55

TABLE

3-1-2

BACKGROUND

ERRORS

Error

No. Type No. Type

1 dde RPP Tripped 6 dde VCXO Out of Lock

2 dde Fractional N Out of Lock 7 dde Extl Too Low

dde Int. Standard Failure 8 dde Extl Too High

3

Descriptive text

4 dde Ext. Standard Failure
5 dde

11 dde Harmonic Loop Volts Low 16 dde Output Loop Unlocked

12 dde Harmonic Loop Volts High 17 exe RF Level limited by AM

13 dde Harmonic Loop Unlocked 18 exe FM limited by Carrier
14

dde Output

15

dde Output Loop

21 exe FM2 limited by FM1 26 dde Real Time Clock

Incorrect

Ext. Standard

Loop Volts Low 19 exe WBFM limited by Carrier

Volts High 20 exe AM2 limited by AMI

Error

9 dde

10

dde

Descriptive text

Ext2 Too Low
Ext2 Too High

Problem

22 exe PM2 iimited by PM1 27 dde Calibration Date Expired
23 exe

Steps

limited

Span 28 dde Pad Calibration Checksum

by

24 exe FM Selfcal Error 29 dde RF Calibration Checksum
25

dde

31 dde Path/Source Calibration 36 dde

32 dde Absolute Mod. Calibration
33 dde Freq. Std. Calibration 38 dde Tracking

34 dde Harm. Select Calibration 39

35 dde Harm. Tune Calibration 40

Internal

Missing 30 dde FM Calibration Checksum

Osc.1

O/P Loop Tune Calibration

37

dde

- -

- -

Band Break Calibration

Calibration

TABLE

Error

No. Type No.

46 exe Recall Checksum
47 exe Incorrect Setup

48 exe Invalid Memory Number 53 exe Mod Rate Outside

49 exe MODULATION NOT ENABLED 54 exe LF Freq. Outside
50 exe Out of Range 55 exe LF Level Outside

56 exe AM Outside Limits 61 exe RF
57 exe FM Outside Limits 62 exe Mod Rate Step
58 exe PM Outside Limits 63 exe LF Freq. Step Too

Descriptive text

3-1-3

FOREGROUND ERRORS

Error

Type

51 exe Carrier Outside Limits

52 exe RF Level

Level

Descriptive text

Outside

Step

Limits

Limits
Limits
Limits

Too Big

Too Big

Big

59 exe WBFM Outside Limits 64 exe LF Level Step Too Big

exe Carrier

60

66 exe FM Step Too Big 71 exe Sweep Stop Out

Step

Too Big

65

exe AM

Step

Too Big

of

Range

67 exe PM Step Too Big 72 exe Sweep Steps Out of Range
68 exe Invalid Latch Number 73 exe Sweep Time Out of Range
69 exe Invalid Latch Data 74 exe Sweep Marker Out of Range
70 exe

Sweep Start Out

of Range 75 exe Attenuator EAROM Read

3-1-56

46882-074C

vr Umt in i ivsm

TABLE

76 exe
77 exe
78 exe

exe

79

exe

80

86 exe Clock Data Entry
87 exe At Top Limit

88 exe At Bottom Limit

89 exe Ext. Trigger

90 dde Int.

Error

No. Type

101

102 cmd Mnemonic
103 cmd Block Definition

_ .

104 cmd Block

105 cmd Numeric

Attenuator

Low Noise Box EAROM Read
Low Noise Box EAROM

EAROM Write Error 84
EAROM Read Error

Std. Not Selected

3-1-3

EAROM Write

Disabled 94

Descriptive text

Fault 107

Size 109

Syntax 110

FOREGROUND

1

Write 83 exe

Error 91

TABLE

3-1-4

ERRORS (continued)

81 exe EAROM

82 exe

exe Tone

85 exe Tone

exe RF levelling fault

92

exe REPEAT THIS CALIBRATION

93

95

- -

- .

- -

GRIB ERRORS

No. Type

106

cmd Data Expected
cmd Illegal Data

108

cmd Terminator
cmd GET Error
cmd EOM Error

Continuous Tone Checksum

Sequential Tone Checksum

Wrap Around Error

data Out of Range

Offset Out of Range

Descriptive

Expected

text

111

112
113
114 exe Instrument Mode
115 cmd Lost Data After

121

122
123
124
125

131

132

exe Illegal Modulation Mode
exe No Such Monitor

Mode 117

exe Cannot Monitor

Wrong 119

Comma 120

exe String Length
exe Illegal Tone Character

exe Illegal Duration
exe Illegal Standard

exe illegal

Save Destination 130

exe Unknown Cal Point

exe Unknown RF

Char 128

Band 137

133 exe Unknown Instrument
134 exe User Data

135 qye Query Lost

141 exe

142 cmd Data Unknown

Wrong RF units

143 exe Negative Value
144

145 exe Unavailable

exe Illegal Modulation

Checksum 139

after arb. char 140

Illegal 148

Mode 149

Mod Source 150

116

118

126
127

129

136 exe

Mode 138

146

147 exe

qye Unterminated
qye Interrupted
qye Deadlock

cmd Missing Quote
cmd Terminator

exe Illegal SeqTones Mode
exe

Overflow

Expected

cmd Data Too Long

exe Voltage Type Error
exe Sweep Not

Possible

Unknown Freq. Standard.

exe User Data Locked
exe Trigger Unknown
exe Illegal Tones Operation

cmd Error

exe Wrong Family For Command

Not Suitable For Hopping

exe Hopping Sequence Full

-

-

-

-

in

Char

Data

46882-074C 3-1-57

TABLE

3-1-5

FATAL

ERRORS

Error

Type No. Type

No.

171 exe Main RAM Faulty 176

Descriptive text

172 exe Main PROM Faulty 177

173 exe Microwave Board Error 178
174

175 exe

exe Attenuator Type Unknown 179

Wrong Attenuator fitted 180

Error

Descriptive text

-

-

-

-

3-1-58

46882-074C

CONTENTS

INTRODUCTION

GPIB

DEVICE LISTENING
DEVICE

PROGRAMMING

DEVICE DEPENDENT COMMANDS

DEFAULT SETTINGS

INSTRUMENT MODE

CARRIER FREQUENCY

RF LEVEL

MODULATION MODE

MODULATION CONTROL

FREQUENCY

PHASE MODULATION

AMPLITUDE MODULATION

WIDEBAND FM

PULSE MODULATION 3-2-20

MODULATION FREQUENCY

CTCSS TONES EDIT

SEQUENTIAL TONES

LF CONTROL
LF GENERATOR FREQUENCY
LF GENERATOR LEVEL

MEMORY
MEMORY
MEMORY

SWEEP
SWEEP MODE/TYPE
SWEEP

FREQUENCY HOPPING

MISCELLANEOUS COMMANDS

THE STATUS BYTE

STATUS DATA STRUCTURE

STANDARD EVENT REGISTERS

HARDWARE EVENT

COUPLING EVENT REGISTERS

INSTRUMENT EVENT REGISTERS

QUEUE FLAG DETAILS

STATUS BYTE WHEN READ BY *STB?
STATUS BYTE WHEN READ BY SERIAL POLL

SUMMARY OF STATUS REPORTING COMMANDS AND QUERIES

FUNCTIONS

Chapter

GPIB OPERATION

ELEMENTS

TALKING ELEMENTS

Program

Compound headers

Program data

Message

Remote/local operation

Common commands and queries

OPERATION

CONTROL

messages

exchange protocol

MODULATION .

-

STORE

-

RECALL

-

ERASE

REGISTERS

-

REGISTER MODEL

3-2

(IEEE 488.2)

PAGE

3-2-2
3-2-2

3-2-3
3-2-3
3-2-4

3-2-4

3-2-4

3-2-5
3-2-5

3-2-5
3-2-6
3-2-8
3-2-8

3-2-10
3-2-10

3-2-11

3-2-14

3-2-15
3-2-16
3-2-17

3-2-18

3-2-19

3-2-21
3-2-23

3-2-24

3-2-28

3-2-29

3-2-30

3-2-31
3-2-31

3-2-31

3-2-32

3-2-35

3-2-36
3-2-36
3-2-37

3-2-40

3-2-41

3-2-43
3-2-44

3-2-45
3-2-46

3-2-47

3-2-48
3-2-49

3-2-50

LIST OF TABLES

Table

46882-074C

3-2-1

Instrument default settings

.3-2-8

3-2-1

INTRODUCTION

The 2040 series Signal Generators can be operated remotely from a personal computer

with

fitted

by coded messages sent over

instrument. IEEE Standard

of commands.

a GPIB interface card or a dedicated

488.2

GPIB controller. All functions can be controlled

the interface bus via the 24 way socket on the rear panel of the

(1987)

is implemented, which

defines the protocols

and syntax

The instrument can

function either as a talker or a listener. In the listen mode, it will

respond to IEEE 488.2 common commands and queries and device-specific commands

queries. These allow various device

In the talk mode,

instrument.

device

status information and parameter settings can be read from the

For full information on the IEEE protocols and

functions to be controlled and operating parameters to be set.

syntax

the

IEEE 488.2 Standard should

be consulted.

GPIB FUNCTIONS

The IEEE 488.1 interface functions

Source handshake (SHI)

Acceptor handshake (AH1)

Talker (T6)

Listener (L4)

Service

request (SRI)

offered by 2040 series are as follows:

complete

capability,

complete capability.

basic talker, serial poll, unaddress
basic listener, unaddress if MTA.

complete capability,

if MLA.

and

Remote/Local (RL1)

Device

Device

Parallel poll (PPO)

Controller

Tri-state

clear (DC1)

trigger (DTI)

(CO)

drivers

(E2)

complete capability,

complete capability,

complete capability,

no capability,

capability.

no

as opposed to

open collector

drivers.

3-2-2

46882-074C

DEVICE LISTENING

ELEMENTS

The following is a list

standard) which are

used in the 2040 series of signal generators:

<PROGRAM MESSAGE>
<PROGRAM MESSAGE TERMINATOR>

<PROGRAM MESSAGE

<PROGRAM

MESSAGE UNIT SEPARATOR>

<COMMAND MESSAGE UNIT>

<QUERY MESSAGE UNIT>

cCOMPOUND
<COMPOUND

<PROGRAM HEADER SEPARATOR>
<PROGRAM DATA>

<PROGRAM

<DECIMAL NUMERIC PROGRAM DATA>

DATA SEPARATOR>

<CHARACTER PROGRAM

<SUFFIX PROGRAM DATA>

<STRING PROGRAM DATA>

<ARBITRARY

DEVICE TALKING

the device

of

UNIT>

listening elements (as defined in the IEEE 488.2

COMMAND PROGRAM HEADER>

QUERY PROGRAM HEADER>

DATA>

BLOCK PROGRAM DATA>

ELEMENTS

The following is a list of the device talking elements

standard) which are

<RESPONSE MESSAGE>
<RESPONSE MESSAGE TERMINATOR>

<RESPONSE MESSAGE UNIT>

<RESPONSE MESSAGE UNIT SEPARATOR>

<COMPOUND

<RESPONSE HEADER SEPARATOR>

<RESPONSE DATA>

<RESPONSE DATA SEPARATOR>

<NR1 NUMERIC RESPONSE

<NR2 NUMERIC RESPONSE DATA>

<ARBITRARY

<CHARACTER

<STRING RESPONSE DATA>

<DEFINITE LENGTH ARBITRARY BLOCK RESPONSE DATA>

(as defined in the IEEE 488.2

used in the 2040 series of signal generators:

RESPONSE HEADER>

DATA>

ASCII RESPONSE DATA>

RESPONSE DATA>

46882-074C

3-2-3

PROGRAMMING

Program

colon

defined as one of the following:

Note ...

(;).

messages

A message

The whole message

(1)

(2)
(3)

consists of one

<newline>

<newline>

+

END (EOI is asserted on the last data

(ASCII 10

+

END (the EOI line is asserted as well)

A response message is always terminated

A message unit consists

follows, then it must

Spaces

or within

A

the generationofa response

and queries

may be freely inserted in a

data.

header may be a command

(defined in IEEE

be separated from its header

message which will be read

488.2)

or more message units. Message units are separated

is ended by the Program

-

often

known as 'line feed') or

of a mnemonic header which

Message Terminator (or End Of Message)

or

byte of the message)

by <EOM> consisting

may be

<newline>

of

followed

by at least one space:

<header><SPACExdata>

e.g. RFLV:INC 6.0 dB

message to improve readability, except within

or a query.

begin

with a

query has a

A

'?'

as its

final character and causes

by the controller.

by data. If data

Common

by a semi-

+ END.

a header

commands

Upper and lower

interpreted

by the 2040 series

Compound

headers

case characters are

in the same way).

The 2040 series implements

to be built up

a compound header are separated

Special rules apply when

the separator
the message are assumed to

is equivalent

This does not apply to

preceding a header

from a small set

is encountered, all

to the two commands:

of basic elements in a 'tree and branch' structure.

precede the following header,

common commands

with a colon, for example:

considered equivalent

compound

by a colon

headers which

Spaces are not allowed

(:).

more than one compound

headers except the trailing element

allow

header is used in one message. When

for example:

AM:DEPTH 30PCT;ON

AM:DEPTH 30PCT

and

AM:ON

(*RST

etc.).

The rule may be overridden

(i.e. FM fm Fm fM are all

a complex set of commands

The elements of

within

of

a header.

the previous

header in

by

3-2-4

AM:ON;:FM:ON

46882-074C

Most

main functions have a short form of header which may

simple messages, for example:

CRFQ 1.25 GHZ is the same as CRFQ:VALUE 1.25GHZ

be

used for clarity and brevity

in

Program

data

Data can take many forms, as follows:

Decimal Numeric Data is a flexible numeric format which encompasses

point and floating point

appropriate to the function. Decimal data can, in most cases, be followed by the appropriate

units. If no units are present, the specified default units are assumed.

Character Data is an alphanumeric word.

String Data consists of a number of 7-bit ASCII characters enclosed in quotes, either a

pair of single ('ASCII 39') or double ("ASCII 34") quotes may be used.

(mantissa

and exponent)

representations. Data is rounded to a resolution

Block Data is used by *PUD and allows a number of 8-bit bytes to be transferred.

further information see the Service Manual.

Some commands can accept Multiple Data items which are separated

example

MODE FM,AM.

integer, fixed

For

by commas, for

Message exchange protocol

The controller should not attempt

message (terminated

the entire response (terminated by EOM). The

message

generated.

unit,

but

by EOM). Also,

only one response message (containing

to read a response

it

should not

start to send a new

query

message may contain

until

several

it has sent

the entire query

message until it has read

more than one

response message units) is

query

Failure to follow the protocol will generate a query error:

UNTERMINATED (error

without

INTERRUPTED (error

before having read

DEADLOCK (error

the controller having sent an extra long Message containing several query

having

sent a query.

117)

the response to a preceding query.

can only occur if the input and output buffers are both filled by

118)

occurs when the controller attempts to read a response

116)

occurs when the

controller

starts to send

a

new

message

message

units.

The 2040 series have input buffer stores of 256 characters and an output buffer of two

response message units.

Remote/local operation

When the 2040 series Signal Generator is addressed by the controller it will enter its remote

mode and the screen will have only one key legend, [LOCAL]. Pressing this key

to normal manual operation,

unless Local Lockout has been asserted by the controller.

returns the unit

46882-074C

3-2-5

Common commands and queries (IEEE

488.2)

The IEEE 488.2 standard defines a set of common

commands

queries which

and

implement common system functions.

Common command and query mnemonics are preceded by an asterisk

them

from

common commands

Mnemonic Name and

*IDN? Identification Query. Returns an arbitrary ASCII response

device dependent data such

and

queries are implemented in the 2040 series:

Description

data fields in the format:

<Manufacturer>,<type number>,<serial number>,<firmware

Example: MARCONI INSTRUMENTS,

as instrument programming

,123456789, 2. 008<EOM>

2041

strings. The following

version

to

(*)

comprising

number><EOM>.

*OPT? Option Identification Query. Returns an arbitrary ASCII

containing a data field for each fitted option in the format:

coption a>,<option d>,

Example: SECOND OSCILLATOR, PULSE MODULATION,

If no options are fitted, ASCII

,<option

...

«><EOM>

returned.

is

'O'

+19

dBm OUTPUT <EOM>

distinguish

four

response

Note...

Because

(<EOM>) either *IDN? or *OPT? must be the last Query Message Unit in a

Arbitrary

an

ASCII Response ends

with the Response Message Terminator

Program

Message.

*RST Reset Command. Sets the instrument functions to the factory default

power

*TST? Self Test Query. Returns

operating.

up state. The default settings appear in Table

'()'

when the GPIB interface and processor are

a

*OPC Operation Complete Command. Sets the Operation

Standard Event Status Register when execution of the preceding operation

complete.

is

3-2-1.

Complete bit

in the

*OPC? Operation Complete Query. Returns a T when the preceding operation has

been completed.

*WAI Wait to Continue Command. Inhibits execution of an

command until

completed.

the

execution

of the

preceding operation has been

overlapped

*TRG Trigger Command. Equivalent to Group Execute Trigger.

*PUD <block> Protected User Data Command. Sets the Protected User Data, accepts

Definite Block Data when enabled. This command is covered in further

detail in the

3-2-6

Service

Manual.

46882-074C

*PUD?

Protected User Data Query. Returns the User Data

Response.

as a Definite Block

Example:

*STB?

*SRE

<nrf>

*SRE?

*ESR?

*ESE <nrf>

*ESE?

*CLS

Note...

#221Inventory Number 1234

Read

Status Byte Query. Returns the value of the Status Byte as an

number

Service

Register.

Service

Enable Register as

Standard Event Status Register Query.

Event

Standard Event Status Enable

Register.

Standard Event

Event

Clear Status Command. Clears all the Status Event

Error Queue.

(0-255).

Request Enable Command. Sets the Service Request

Request Enable Query. Returns the value

nrl.

Returns the value of the Status

Status Register as nrl.

of the Service Request

Command. Sets the Standard Event Enable

Status Enable Query. Returns the value of the Standard

Status Enable Register as nrl.

registers and clears the

Does not affect the Enable Registers.

nrl

Enable

The IEEE 488.2 Device Clear function

output buffers are cleared and

the instrument put

only affects the GPIB functions. The input and

into

a state of accept new

no longer puts the instrument functions into a defined state,

*RST common command.

this is

Messages.

now performed

It

by the

46882-074C

3-2-7

:

:

DEVICE DEPENDENT COMMANDS

following

The

series

(Carrier frequency, RF

level mnemonics. Each group is followed by a list of requirements for

signal generators together

In addition to the normal listen commands the 2040 series

list describes the features of the device

with

simple examples of their use

Level, etc.).

The root mnemonic is

cause the instrument to prepare a message which will be sent to the

instrument is

next addressed

to talk. For each query

an example of a response is

dependent mnemonics for the 2040

within each major section

listed first

accept query commands

followed

data type and suffix.

controller when

responses are similar for a group of queries not all are listed. Some queries can

than one type of response

In the list

which follows,

-

an example of

the

each is usually given.

abbreviations <char>, <nrf> and <str> have the

meanings:

Where

<char>

<nrf>

<str>

the data

format

=

Character Program Data

=

Decimal Numeric Program Data

=

String Program Data

is Decimal

Numeric Program Data, the value may be expressed as a

signed or unsigned number in any of the following formats:

nrl: Decimal integer, e.g. 1234 or

nr2:

nr3: Floating point

Floating point number, e.g. 1.234 or

number with exponent, e.g. 1.2345E5 or -12.47E-8

-567

-56.789

by the

lower

which

the

given.

Where

produce more

following

DEFAULT SETTINGS

These are the settings

(i)

(ii) Execution of *RST command.

(iii) Recall Full Store 50.

Power-up

assigned to

to factory default settings.

instrument functions in

The instrument functions set to the factory default

(*RST) are as

shown in Table

TABLE

Instrument Mode : Normal

Noise Mode : Low

Carrier Frequency : (Maximum available) 1 .35 GHz/2.7 GHz/5.4 GHz

Step

RF Level

:

Step

3-2-1

3-2-1

INSTRUMENT

Noise 1

1 kHz

(Minimum available)

1 dB

DEFAULT SETTINGS

-144

Status: ON

dBm

the following cases:

power-up state by the reset command

Modulation Mode

3-2-8

:

Single FM

Modulation

,

enabled

46882-074C

TABLE

3-2-1

INSTRUMENT

DEFAULT SETTINGS

(continued)

Modulations

FM1 0 Hz, Int F4, ON

FM2 0 Hz, Ext 1 ALC,

<PM1

<E>M2 0 rad, Ext 1 ALC, ON

AMI

AM2

0 rad, Int F4, ON

F4, ON

Int

0%,

Ext 2 ALC, ON

0%,

WBFM (Minimum setting),

Steps AFM 1

Modulation

LF

source IntFI 300 Hz sine

lntF2 400
lntF3 500 Hz sine

lntF4 1 kHz sine

lntF5
lntF6 6 kHz sine

Step 1 kHz

Mode Monitor, Mod Source

LF Generator Frequency : 1 kHz sine,

Level

Step

Status

Sweep:

Type RF Level

Mode Single

RF

Level Sweep

Start 0 dBm

Markers

Carrier Freq. Sweep

Start 100

Markers

2,

200,

kHz, A <I>M 0.1 rad, AAM 1%

Hz sine

3 kHz sine

: 1

00 nV

1 dB

:

ON

:

Internal

Stop: 10 dBm Steps: 100 Time:

4,

10 dBm, disabled

6,

8,

MHz

Stop:

400, 600, 800,

(Maximum available)

1 000 MHz, disabled

ON

coupled. ON

AC

step 1 kHz

ms

50

Steps: 250 Time 50 ms

Mod. source Freq.

Start 0.1 Hz

Markers

Sequential Tones

Mode

Standard

Sequence

Duration

Frequency Offset

Extended Duration

Repeat Tone

Start Delay

Stop: 500 kHz Steps: 10,000 Time: 500 ms

100, 20,

30,

400,

500 kHz

No modulation selected.

CCIR

16 Tone Fs

All normal.

0

500 ms

E

200 ms

46882-074C

3-2-9

INSTRUMENT

MODE

:

:

:

:

:

:

:

1

0

\

(

|

IMODE

Data

type

Allowed suffices

Default suffix

Examples:

CARRIER FREQUENCY

CFRQ

:VALUE Set Carrier Frequency

:INC

Data

type

Allowed suffices

Default suffix

:UP Go UP one step

:DN

:RET

:XFER Transfer current value

Select instrument mode

Character Program Data (either NORMAL, NOISE1 OR

NOISE2 for signal generator operation or SWEEPER for swept

operation)

None

None

IMODE NORMAL
IMODE NOISE

Set Carrier Frequency (short form)

Set Carrier Frequency step

Decimal Numeric Program

Data

Any one of: GHZ, MHZ, KHZ or HZ

HZ

Go DOWN one

Return to

original

step

setting

to be the

new setting

.

[

!

j

CFRQ?

Data

Allowed suffices : None

PHASE

:

Default

suffix :

Data type : Decimal Numeric Program Data

Allowed suffices

Default suffix : None

Examples:

Example:

type

None

None

Adjust

(approximately

None

:

CFRQ: VALUE 1.23MHZ;INC 10KHZ

CFRQ : UP

Prepares message containing information on Carrier Frequency

setting in the following format:

Phase of Carrier in steps of Jt/128 radians

1.4°

over

a range of ±255 steps

XFER

;

)

:CFRQ:VALUE <nr2>; INC <nr2>

: CFRQ: VALUE 1000000000 .

INC 25000,0

;

(

3-2-10

46882-074C

RF LEVEL

:

:

:

:

:

:

;

:

:

:

:

:

:

:

:

Mr iw mt L.iim ivn

1

RFLV

:VALUE

Allowed suffices

:INC

Allowed

:UP

:DN

:RETN

:XFER

:ON

:OFF

Allowed suffices

:TYPE

Data

type

Default suffix

Data type

suffices

Default suffix

Data

type

Default suffix

Set RF output level (short form)
Set RF output level

Decimal Numeric Program

Any one

dBm

Set

Decimal

of: DBM, DBV, DBMV, DBUV, V, MV

unless changed by

level

RF

step (dB)

Numeric Program Data

Data

UNITS

DB only

DB

Go UP one step
Go DOWN

Return to original setting

Transfer current value to

Turn

RF output ON

Turn RF output OFF

None

None

None

Selects

one step

EMF or PD for

be the new setting

voltage

command

related units

or

UV

Allowed suffices

:UNITS

Allowed suffices

Data type

Default

Default suffix

suffix

Data

type

Examples:

Character

Program

Data

(EMF or PD)

None
None

Select default

Character Program Data (DBM, DBV,

or UV)

RF level units.

None
None

RFLV: VALUE
RFLV: TYPE PD;

-27.3DBM;ON

VALUE 1.23UV

DBMV. DBUV, V,

MV

46882-074C

3-2-1

RFLV (continued)

:

:

:

:

:

:

RFLV?

:OFFS

:VALUE

Allowed

:ON

:OFF

:SAVE

Allowed suffices

Data type

suffices

Default suffix

:ENABLE

:DISABLE

Data type

Default suffix

Example:

[not used alone]

Set Offset

of

current band

Decimal Numeric Program Data

DB only

DB

Turn ON offset of current band
Turn OFF

Enable Offsets

Disable Offsets

Store Offsets in memory

None
None

None

RFLV :

Prepares message containing information on RF

setting in the following format:

offset of current band

OFFS

: VALUE

-0

. 2DB; ON ? ENABLE

Level

RFLV:OFFS?

Examples:

RFLV:UNITS <unit>;TYPE

<nr2>;<status>

where:

<unit> is

default RF level units (DBM,

<type>;VALUE <nr2>;INC

character program data defining the

DBV,

DBUV, V, MV or UV), <type> is character

program data indicating EMF or PD

<status> is a program mnemonic indicating

whether

: RFLV : UNITS DBM;VALUE -103.5;INC 2.0;ON
: RFLV: UNITS DBV; TYPE EMF? VALUE

the RF

Prepares message containing information on RF

offsets in the

:CFRQ:VALUE

<activity>

following format:

<nr2>;:RFLV:OFFS:

where: <status> is a program mnemonic

whether the RF offset is ON or OFF and

<activity>

whether the offset mode is enabled or

disabled.

output

program mnemonic indicating

is a

is ON or OFF.

-83.

2; INC 0.5; ON

VALUE

<nr2>;<status>;

indicating

DBMV,

and

Level

Example:

3-2-12

:CFRQ:

VALUE

500000000 .

?: RFLV:OFFS : VALUE

0

-0

.

4

; ON ; ENABLE

46882-074C

RFLV

RFLV

(continued)

:HYST

:ENABLE

:DISABLE

Data type : None

Allowed suffices

Default suffix : None

[not used alone]

Enable Extended Hysteresis mode

Disable

: None

Extended Hysteresis mode

:RFLV:HYST?

RFLV

:OVER

: RFLV:OVER?

or : RFLV: HYST: DISABLE

: ENABLE
: DISABLE

Data type : None

Allowed suffices

Default suffix

or :RFLV:0

Responds with status as follows:

:RFLV:HYST:ENABLE

[not used alone]

Enable Overrange mode

Disable

None

:

None

:

Responds

: RFLV:OVER

Overrange

with status as

:ENABLE

mode

follows:

VER:DISABLE

46882-074C

3-2-13

MODULATION MODE

MODE Set modulation mode

Data type : Character Program Data (valid combinations of AM, AMI,

AM2, FM, FM1, FM2, PM, PM1, PM2,

see Table below)

Allowed suffices : None

Default suffix

: None

WBFM or

PULSE,

Examples:

mode am,fm
MODE FM1 , FM2

VALID MODE

Single Composite Dual Dual Composite

AMI AM1.AM2 AM1.FM1 AM1.AM2.FM1.FM2

FM1 FM1.FM2 AM1.PM1 AM1.AM2.PM1.PM2

PM1 PM1.PM2

COMBINATIONS

AMI

,WBFM AMI ,AM2,WBFM

TABLE

WBFM PULSE,FM1 PULSE,FM1.FM2

PULSE PULSE,PM1

PULSE,WBFM

Note...

At any time the

*1*

be omitted, for example FM

may

FM1. Order is not important, for example AM,FM is

PULSE.PM1.PM2

equivalent to

is

equivalent to

FM.AM.

For instruments without pulse modulation (Option

Intermodulation mode by using character

data

type PULSE.

fitted select Low

002)

MODE?

Example:

3-2-14

Prepares

in the following format:

message containing

information on Modulation

Mode

:MODE <mode>

where: <mode> is character program data indicating the

modulation

:mode fmi,fm2

mode settings.

46882-074C

MODULATION CONTROL

MOD

MOD?

[not used alone]

:ON Turn

:OFF

Examples:

Example:

Turn modulation globally OFF

mod : on
MOD : OFF

Prepares

Control in the following format:

:MOD:<status>

where: <status>

:

mod: on

modulation globally ON

message containing information on Modulation

is a program mnemonic indicating whether the

Modulation is globally

ON or OFF.

46882-074C

3-2-15

:

:

:

:

FREQUENCY MODULATION

FM or

FM1

DCFMNL

or FM2

:DEVN

:INC

Allowed suffices

Default

:<src>

:ON

:OFF

:UP

:DN

:RETN

:XFER

Allowed suffices :

Default suffix

Data type

suffix

Data type :

Set FM deviation
Set FM deviation
Set FM step size

(short form)

Decimal Numeric Program Data

Any one

GHZ, MHZ, KHZ or HZ

of:

HZ

Select modulation source where <src> is any one of: INTF1,

INTF2, INTF3, INTF4, INTF5, INTF6,

EXT1ALC, EXT2DC, EXT2AC or EXT2ALC

Turn FM ON (locally)

Turn

FM OFF

(locally)

Go UP one step

Go DOWN one step

Return to original setting

Transfer current value to be the new setting

Perform DC FM/WBFM null operation

None

None

None

EXT1DC, EXT1AC,

FM? or FM1?

Examples:

or FM2?

Example:

PM : DEVN 25KHZ ; INTF4 ;ON

FMlsDEVN 15KHZ ; INC 1KHZ;EXT1DC

DCFMNL

Prepares message containing information on

of the

following

:FM:DEVN

formats:

<nr2>;<src>;<status>;INC <nr2>

:FM1:DEVN <nr2>;<src>;<status>;INC <nr2>

:FM2:DEVN

where:

sFMlrDEVN 25000 .

<nr2>;<src>;<status>;INC <nr2>

<src> is a program

of the modulation signal and <status> is a program

mnemonic

locally ON or OFF

indicating whether

; INTF1 ;ON; INC

0

mnemonic

1000.0

representing the source

FM

the

setting in one

modulation

is

3-2-16

46882-074C