Marconi 6313 User Manual

Download

Page 1

Operating Manual

10 MHz to 26.5 GHz

PROGRAMMABLE SWEEP GENERATOR

6313

H 6313

Vol. 1

Aug. 89

••

No part of this book may be reproduced or transmitted in any form orbyany means, electronic or mechanical, including photocopying, or recorded by any information storage or retrievat system, without permission in writingbyMarconi Instruments Ltd.

Printed in the UK

Manual

pari no.

Print code :

46881-852A

8-8/89

Page 2

CONTENTS

Page

Preface

Operating precautions

Chapter 1 GENERAL INFORMATION

Chapter 2 INSTALLATION

Chapter

Appendix A Sweeper parameters Appendix B Sweeper memory facilities Appendix C Counter Interface Appendix D Self test Appendix

OPERATION

3.1

3.2 Programmable keys

3.3 Private GPIB operation

3.4 Operation with 6500

3.5

Local operation

Calibration

Error messages

iii

1-1

2-1

3-1

3-1 3-33 3-51 3-53 3-63

Index v

List of tables

List of figures

ASSOCIATED PUBLICATIONS

GPIB Operating Manual, H 6313 Vol. lA

Service Manual. H 6313, Vol. 2

Part No.

46881-853Z

46881-852A

Aug. 89

Ioio

Page 3

PREFACE

WARNINGS, CAUTIONS AND NOTES

These terms have specific meanings in this manual:- WARNINGS contain information to prevent personal injury.

CAUTIONS contain information to prevent damage to the equipment. Notes contain important general information.

HAZARD SYMBOLS

The meaning of hazard symbols appearing on the equipment is as follows:-

Symbol

MANUAL

Each page in this manual bears the date of its original issue or, if it has been amended, the date and status number of the latest amendment. Any changes subsequent to the latest amendment status are included on Manual Change sheets coded Ct , C2 etc. at the front of the manual. .

AMENDMENT

Nature of hazard

Dangerous voltages Static sensitive components Precision ·connector

STATUS

Reference

Page iv Page iv Page 3-2

In manual

46881-852A Aug. 89

jjj

Page 4

OPERATING PRECAUTIONS

This product has been designed and tested in accordance with IEC Publication 348 - 'Safety Requirements for Electronic Measuring Apparatus'. To keep it in a safe condition and avoid risk of injury, the precautions detailed in the WARNINGS below should be observed. To avoid damage to the equipment the precautions detailed in the CAUTIONS should also be observed.

WARNING - ELECTRICAL HAZARDS

AC supply voltage. This equipment conforms with IEC Safety Class1,meaning that it is provided with a protective earthing lead. To maintain this protection the mains supply lead must always be con- nected to the source of supply via a socket with an earthing contact. Make sure that the earth protection is not interrupted if the supply is connected through an extension lead or an autotransformer.

Before fitting a non-soldered plug to the mains lead cut off the tinned end of the wires, otherwise cold flowing of the solder could cause intermittent contact.

Do not use the equipment if it is likely that its protection has been impaired as a result of damage.

Fuses. Note that there is a supply fuse in both the live and neutral wires of the supply lead.

one of these fuses should rupture, certain parts of the equipment could remain at supply potential.

Make sure that only fuses of the correct rating and type are used for replacement. Do not use

mended fuses or short-circuited fuse holders.

To provide protection against breakdown of the supply lead, its connectors (and filter if fitted), an

external supply fuse with a continuous rating not exceeding

fitted in the supply plug).

6 A

should be used in the live conductor (e.g.

only

{

l L

•

)

••

Removal of covers. Disconnect the supply before removing the covers so as to avoid the risk of exposing high voltage parts. on. it must only be performed by a skilled person who is aware of the hazard involved.

Remember that capacitors inside the equipment. including any supply filter capacitors, may still be charged after disconnection of the supply. Those connected to high voltage points should be discharged before carrying out work inside the equipment.

WARNING - OTHER HAZARDS

Parts of this equipment are made from metal pressings, therefore it should be handled with due care to avoid the risk of cuts or scratches.

Some of the components used in this equipment may include resins and other materials which give off toxic fumes if incinerated. Take appropriate precautions, therefore, in the disposal of these items.

This equipment has a lithium battery which if incorrectly handled could causeadanger to health or

safety - refer to the Service Manual for safe handling precautions.

CAUTION - LCD HANDLING

When using this equipment take care not to depress the front or rear faces of the display module as this may damage the liquid crystal display elements.

CAUTION - STATIC SENSITIVE COMPONENTS

any internal adjustment or servicing has to be carried out with the supply

~-'

This equipment contains static sensitive components which may be damaged by handling - refer to

the Service Manual for handling precautions.

46881-852A

Aug. 89

Page 5

Chapter 1

GENERAL INFORMATION

FEATURES

Performance

The 6313 is a programmable sweep generator with a range of 10 NIHz to 26.5 GHz. It provides a combination of frequency and power sweeps with a typical accuracy of 20 MHz and ±0.4 dB. When used with Marconi Instruments' 6500 Automatic Amplitude Analyzer it forms a scalar measurement system with a private GPIB to enhance the performance of the 6500, as well as a system GPIB to allow operation as part

of a complete automatic test system.

Control and display

Logically arranged keypads. with step keys and a rotary control allow rapid manual

operation. A large, backlit LCD display shows operating status, current values of controlled parameters, and the current functions of four 'soft' keys. The 6313 can also be fully controlled via the GPIB.

Fig.

1-1

46881-852A

Aug. 89 1-1

Programmable Sweep Generator

----

6313

with Automatic Amplitude Analyzer 6500

Page 6

GENERAL INFO~MAT10N

Soft keys and configuration keys

In normal operation, some or all of the four soft keys have one operating parameter assigned to each of them. Selection of a soft key allows the value or state of the parameter associated with it to be changed.

Parameters are assigned to the soft keys according to which 'configuration' (group

of parameters) has been selected.

There are fifteen pre-programmed configurations currently available on the 6313, for example:

Configuration Associated parameters

[FI - F2]

[SWPfTRG]

The pre-programmed configurations are accessed by labelled 'configuration keys'. Additionally, there are six 'user-programmable' keys, which allow you to store and access your own configurations to match a particular application (see 'User programming').

Start frequency eFI), stop frequency (F2) power level (PI), sweep time (TIME).

Internal/external sweep (sweep), sweep trigger

(swp_tr), single sweep initiation (s_swp),

counter trigger (cntr_tr).

Operating mode/sweep configurations

There are four basic operating modes:

1) Frequency sweep at constant power.

2) Frequency sweep with power slope.

3) Constant frequency and power.

4) Constant frequency with power sweep.

The frequency sweep can be defined either between lower and upper limits F2) or as a frequency span about a centre frequency (CF - ~F). These two alternatives

for the definition of the frequency sweep give a total of six 'sweep configurations', each accessed by a labelled configuration key.

(Fl -

Markers

f .

Up to five frequency markers may be set within a sweep. These enable you, for

example, to stop the sweep at some nominal frequency and accurately measure that frequency using a counter. Another application is the setting of secondary limits within the total sweep, to allow both in-band and out-of-band testing.

Memories

Twenty non-volatile memories can each store complete sweeper settings.

The contents of the memories can be reviewed one after the other using the step keys or rotary control. While reviewing the memories, the RF output is switched off to avoid any risk of damage to sensitive test pieces.

46881-852A

1-2

Aug. 89

r .

Page 7

GENERAL

INFO~MATION .

Any memory setting can be chosen as the power-up condition, so that repetitive

testing can begin immediately after switch-on.

User programming

The PROG key enables you to create and store (in non-volatile memory) up to six of your own configurations. These can then be accessed via the six 'user-programmable' configuration keys.

Applications of this facility include the ability to further simplify operation by masking non-critical parameters and adding relevant parameters which could otherwise only be accessed by selecting another configuration key. A real-time clock can also be added to the display to allow the timing of a test procedure.

If required, all frequency information may be removed from the screen for security.

User calibration

The output power and frequency of 6313 may be simply re-calibrated to match special measurement conditions. A complete user calibration might be necessary, for example, where a long cable intervenes between the 6313 and the test piece, or where there is a high ambient temperature. A limited calibration can also be performed over a specified part of the sweeper's frequency range.

Using Marconi Instruments RF Power Meter 6960 or

6960A

(with Sensor 6913) and the 26.5 GHz Microwave Counter 2442 connected to 6313's Private GPIB, full re- calibration takes approximately 20 minutes.

Two sets of complete user calibration data and two sets of limited calibration data

can be held in non-volatile store while the primary calibration is also retained.

User calibration is only allowed after entry of special authorization codes which are

contained in a document which accompanies each sweeper. The primary calibration is

doubly protected in this way. All re-calibration may be disabled by the setting of an internal switch.

The display indicates whether primary, user or limited calibration is in use.

Scalar analysis

The 63J 3 with Marconi Instruments' 6500 Automatic Amplitude Analyzer form a

complete scalar network analysis system.

Measurements which can be made include:

Return loss Voltage Standing Wave Ratio (VSWR) Gain Insertion loss Gain compression Absolute power

Connection between the 6313 and the 6500 via the Private GPffi allows intelligent interaction between the instruments which greatly enhances the performance of the 6500. Details of the operation of the 6313 with the 6500 are given in Chap. 3-4.

46881-852A

Aug. 89

1-3

Page 8

GENERAL INFORJVlATION

System GPIB operation

Over 170 commands allow full control via the system GPIB. In addition to those commands which are equivalent to front panel key operations, others allow fast data transfer, text display and other facilities.

RF generation

The 6313 uses fundamental YIG tuned oscillators operating in the bands 2-8 GHz, 8-12.4 GHz and 12.4-20 GHz and 20-26.5 GHz. These provide the sweeper with a very pure output having low harmonic and sub-harmonic components. Coverage to 10 MHz is achieved by employing a frequency down-converter in conjunction with the 2-8 GHz oscillator. All four YIG oscillators are kept running while the sweeper is switched on to increase stability and reduce band switching times. Switching between oscillators is by means of a PIN switch which gives a typical band switch delay of 0.5 IJ.S. The levelling circuit uses a wide band coupler and detector diode for the 2 GHz to 26.5 GHz band and an additional coupler/diode for the 10 MHz to 2 GHz band.

Digital correction data for all significant frequency values and power levels are stored in memory, and applied to the sweep.

The FM input allows direct access to the YIG oscillators so that external frequency

locking devices may be used.

[

The RF on/off key has an integral LED to indicate whether or not the output is

enabled. The LCD gives an UNLV (unlevelled) display levelled; for instance if the output power is greater than the set power level at low power levels, or less than the set power level at high power levels. UNLV is also displayed when the output is switched off. Levelled power is guaranteed over the range -5 to +10 dBm

(+7 dBm above 18 GHz).

the output power is no longer

(

1-4

46881-852A

Aug. B9

Page 9

PERFORMANCE DATA

Frequency

GENERAL INFORMATION

Range: Resolution:

Display resolution:

Accuracy at caJ. temp

Fl and CW:

CF, F2, sweep modes at 100 ms sweep or slower:

Stability

With temperature:

With 10% supply voltage change:

0.01 GHz to 26.5 GHz. 500 kHz in all modes.

10kHz in CW vernier mode, manually (rotary control) and with GPIB control.

100 kHz in all modes.

±10 MHz max., ±3 :MHz typical at 23°C ±5°C. ±15 MHz otherwise at cat. temp.

±30 MHz, ±20 MHz typical.

±1 MHz per °C typical. Total shift of no more than 60 MHz over 0-50°C range.

10 kHz.

With 10 dB power level change:

With 3:1 load VSWR at+10 dBm output

(+7

dBm for 18-26.5 GHz)

10 MHz to 2 GHz: 2 GHz to 8 GHz: 8 GHz to 12 GHz:

12 GHz to 20 GHz: 20 GHz to 26.5 GHz:

With time at constant temp. after 1 hour warm up:

Residual PM (in 10Hz to 10kHz bandwidth CW mode with filter on)

1011Hz to 2 GHz: 2 GHz to 8 GHz: 8 GHz to 12 GHz:

12 GHz to 20 GHz: 20 GHz to 26.5 GHz:

±300 kHz over calibrated power range.

±10 kHz typical, ±100 kHz max. ±50 kHz typical, ±500 kHz max. ±250 kHz typical, ±500 kHz max. ±50 kHz typical, ±500kHz max. ±500 kHz max.

±100 kHz max.

8 kHz peak typical, 10 kHz peak max. 6 kHz peak typical, 10 kHz peak max.

7.S kHz peak typical, 10 kHz peak max. 10kHz peak max. 10kHz peak typical, 15 kHz peak max.

46881-852A

Aug. 89

1-5

Page 10

GENERAL INFORMATION

Accuracy

10 MHz to <2 GHz:

2 GHz to <26.5 GHz:

Linearity: Sweep time: Resolution: Displayed resolution:

Power slope characteristics

Slope range:

Accuracy

10 MHz to <2 GHz:

2 GHz to <26.5 GHz: Linearity: Time:

±0.5 dB at 0 dBm and at cal. temp. ±0.4 dB at 0 dBm and at cal. temp.

0.1 dB typical, 0.2 dB max. Selectable between 10 ms and 33.5 s.

1 ms.

3 digits.

dB/GHz

range.

±0.5 dB over calibrated power range. ±0.4 dB over calibrated power range.

0.1 dB typical, 0.2 dB max.

As for frequency sweep.

to 20

dB/GHz

power over calibrated

ModulatIon

Internal square wave AM

Frequency range:

Frequency accuracy: Frequency resolution:

Depth

10 MHz to <2 GHz:

2 GHz to <12.5 GHz:

12.5 GHz to 26.5 GHz:

Rise and fall time

(10% to 90%):

External pulse AM

Frequency response:

1.0 to 100 kHz. ±0.05%.

0.1 kHz up to 32.5 kHz.

kHz from 32.5

-55 dBc.

-60

dBc.

-45

dBc.

0.5 us.

100 kHz.

[

(

1-8

Depth: Rise and

(10% to 90%):

fall

As internal square wave AM.

time

As internal square wave AM.

46881-852A

Aug. 89

Page 11

External AM

GENERAL INFORJVlATION

External

General

Display:

RF blanking:

Frequency response: Input impedance: Dynamic range:

Deviation:

Sensi tivity: Input impedance:

DC to 100 kHz.

10 kG nominally.

25 dB.

50 MHz peak to peak.

25 MHz peak to peak at 1 Mlfz rate.

-6 MHz (±l

MHz) per volt.

10 kG nominally.

Contrast of liquid crystal display can be adjusted for viewing angle convenience.

RF can be blanked or present during sweep

retrace using STATUS 1 functions and can be

blanked or present during parameter aJtera- tion using a PROG key function.

Counter trigger:

Stop sweep:

Non-volatile memories:

Start up mode:

Alternate sweep:

Footswitch:

Provides a TTL drive for counter trigger and hold on

Fl, F2,

CF and reference marker. Use connector no. 0631 0-176F for connection to the 2442 26.5 GHz microwave counter.

Holds up sweep with TTL drive (e.g. from counter until valid count obtained).

Up to 20 complete test set-ups may be stored for up to 10 years including those on 6500

when connected on the private GPIB.

Memories and default settings may be

reviewed with RF power off.

Any memory or preset default or power down settings may be chosen for power up conditions.

Allows operation to toggle between current

setting and any memory with RF on.

Use of optional accessory 06313-006T con-

nected to the rear panel FOOTSWITCH

BNe

connector allows the user to operate the fourth softkey whilst leaving both hands free.

This can be used in alternate sweep in a

scalar analysis system when making adjust- ments to the device under test.

46881-852A

Aug. 89

1-9

Page 12

GENERAL INFORMATION

Digital sweep interface:

Clocks/calendar:

Programmed display operation:

Calibration

Standard:

Limited:

Provides a means by which the RF output is swept over a range of discrete values, with each individual step being controlled by a digital signal. The SYSTEM GPIB interface is the only connection required. Sweep con- ditions are set up in advance using anumber of GPIB commands. Thereafter Group Executive Trigger (GET) is sent over the GPIB to the sweeper to step to the next position .. This has advantages in fast ATE applications where it is required to step the RF output faster than can ber achieved by sending new, explicit values of frequency or power over the GPIB.

Selection of DATE allows the user to set/ display the current date in the format

HH:lv1M:SS DD:MMM:YYYY. If a 6500

and digital plotter are connected to the private GPIB the date may be plotted in the bottom right-hand corner of the scalar analysis plot. User resettable elapsed time in hours and overall operating hours

.(factory set) can be displayed.

Up to 6 user defined non-volatile display

control configurations can be created using PROG key&subsequent instructions. These can be amended versions of existing settings to change soft key controls, or to add new

information such as time to a display or to

create new display

control configurations.

Calibration stores provide primary and two

user calibrations held in non-volatile memory.

Access is via a unique key sequence supplied

with each instrument. Calibration

(frequency and power) takes approximately 21 minutes with minimal operator interaction. Power sensor calibration data is held on non- volatile memory.

In addition to the standard calibration facility which operates over the full frequency range of the sweeper, it is also possible to perform a power calibration over a limited frequency

range. This allows the user to calibrate the sweeper at the output of frequency selective devices (e.g. amplifiers or filters). Two additional calibration stores are provided for this. Greater flexibility allows the user to perform a power calibration independently of a frequency calibration.

1-10

46881-852A

Aug. 89

Page 13

GENERAL INFORMATION

Self test:

Output connector:

Output VSWR

10 MHz to <2 GHz:

2 GHz to <12 GHz:

12 GHz to <20 GHz:

20 GHz to 26.5 GHz:

Auxiliary outputs

1VIGHz accuracy:

Sweep out:

GPIB interface:

Capabilities

Stored data in memory is checked at switch

on or by user selection of TEST. Type MPC 3.5*, 50

2.0:J max.

1.25:1 typical. 1.5:1 max.

1.4:1 typical, 1.7:1 max.

1.7:1 max.

±0.3 V 10 :MHz to <2 GHz. ±10% 2 GHz to 26.5 GHz.

to 10V ±2 mY.

System and private buses. All functions except supply switch are remotely programmable.

(fern.)

SYSTEM:

PRIVATE:

Environmental

Safety: Rated range of use: Conditions of storage and

transport

Temperature: Humidity: Altitude:

Complies with sub-sets SHl, AR1, T6. L4, SRI. RL1, PPO, DCI, DTl, CO and E2 as defined

Controller function provided for connection of 6500 Automatic Amplitude Analyzer, 2442

26.5 GHz microwave counter, 6960/6960A RF power meter and digital plotter. INlT key provides bus initialisation at any time.

Complies with lEC 348.

to 50°C.

-40 to+70°C. Up to 90% RH. Up to 2500 m (pressurized freight at 27 kPa

differential, i.e. 3.9 lbfl

IEEE 488-1978 and

in2),

IEe

625-1.

0(0

Marconi Precision Connector

connectors.

46881-852A Aug. 89

3.5

mates non-destructively with SMA and similar

1-11

Page 14

INSTAl!lATION

RACK MOUNTING

The instrument may be mounted in a standard 19 inch rack using the kit

46883-506M available as an optional accessory. Fitting instructions are as follows:

(1) Remove and discard the trim infills on each side of the front panel,

together with their countersunk screws and screw cups.

(2) Fit the rack brackets in the front panel handles or side trim recesses using M4

x 16 pan head screws and washers.

(3) Slide into rack and secure. If the rack system is to be mobile, more support

may be required at the rear of the instrument. Fixing holes are provided for

the purpose. Contact Marconi Instruments if you need further advice.

Note...

It is important that the bottom feet are retained to ensure that a gap is left allowing

air to enter the instrument through the holes in the bottom panel.

SAFETY TESTING

Where safety tests on the AC supply input circuit are required, the following pro- cedures can be applied. These comply with BS 4743 and IEC Publication 348. Tests are to be carried out as follows and in the order given, under ambient conditions, to ensure that AC supply input circuit components and wiring (including earthing) are safe.

(1) Earth lead continuity test from any part of the metal frame to the bared end

of the flexible lead for the earth pin of the user's AC supply plug. Preferably a heavy current (about 25 A) should be applied for not more than 5 seconds.

Test limit: not greater than 0.5 O.

(2) 500 V DC insulation test from the AC supply circuit to earth.

Test limit : not less than 2 MO.

AC POWER SUPPLY

The instrument requires an AC supply of 105 to 120 V or 210 to 240 V, 50 to 400

Hz, 580 VA. The required supply fuses (time lag) are 4 A for 105 to 120 V or 2.5 A for 210 to 240 V. Before switching on, ensure that the rear panel voltage range switch is in its correct position as revealed by the cut-out in the locking place, and that the correct value fuses are fitted. To change the mains voltage setting, reverse the locking plate after setting the slide switch to its alternative position.

The AC supply cable is fitted at one end with a female plug which mates with the AC connector at the rear of the instrument. When fitting a supply plug ensure that the connections are as follows:

Earth (ground) - Green/Yellow Neutral - Blue Live (phase) - Brown

46881-852A

2-2

Aug. 89

Page 15

INSTALLATION

When attaching the mains lead to a non-soldered plug it is recommended that the

tinned ends of the lead are first cut off to avoid the danger of cold flow resulting in intermittent connection.

GPIB CONNECTOR CONTACT ASSIGNMENTS

The contact assignment of the

as shown in Fig. 2-1 below.

DID 1 0102 0103 010·4 EOI

DAV NRFO NDAC IFC SAO ATN

EARTH SHIELD

Fig.

2-1

GPID

lead assembly and the two device connectors is

16 17

18 19

0105 0106

0107 0106 REN

FORMS TWISTED PAIR WITH 6 FORMS TWISTED PAIR WITH 7 FORMS TWISTED PAIR VIIITl-l B FORMS TWISTED PAIR VIIITH 9 FORMS TWiSTED PAIR WITH 10 FORMS TVIIISTED PAIR WITH 11 LOGIC EARTH

GPIB connector contact assignments

Connection to other equipment which has a 24-way bus connector to IEEE Standard 488 can be made with the GPIB lead assembly 43129-189U, available as an optional accessory. An IEEE-to-lEC adapter 46883-40BK is also available for interfacing with systems usinga25-way bus connector to IEC Recommendation 625 - see

Fig. 2-2.

46881-8S2A Aug. 89

2-3

Page 16

INSTAL.'LATION

INSTRUMENT

( IEEE

CONNECTOR)

INSTRUMENT

/ IEEE

CONNECTOR)

INTERFACE BUS LEAD CONNECTION

The leads for the interface bus use special male-female connectors at both ends. This allows several connectors to be stacked one on top of another permitting several leads to be connected to the same source and secured by a lockscrew mechanism. Too large a stack however, may form a cantilevered structure which might cause damage and should be avoided. The piggyback arrangement permits star or linear interconnection between the devices forming a system with the restriction that the total lead length for the system must be:-

:r-.

-(-.1--+/--43-12-e--I-B9-U---t-)-

-C---{..J---'if-'

IEEEtoIEC ADAPTER

46BB3-408K

Fig.

IEEE LEAD

)----, 25 IEC LEAD

--t-}--

2-2

GPIB

interconnections

r--<

EQUIPMENT

WITH IEEE

CONNECTOR

EQUIPMENT

WITH IEC

CONNECTOR

(1) No greater than 20 m (65 ft). (2) No greater than 2 m (6 It) times the total number of devices (including the

controller) connected to the bus.

2-4

46881-852A

Aug. 89

Page 17

LOCAL OPERATION·

I I

LOCAL OPERATION

FRONT PANEL CONTROLS

MA~ONI

INSTAUrYlENTS

-J:

f---I---I.~

PI 0.00<&,

[§]

[i]

10.0tH. F'2 26.

,t==:!

:50913GHz TIME IOO~.

F'2

Chapter

PI TUIE

bl,

Fig.

3-1 "

3-1

Front panel

SUPPLY ON. Clockwise: ON, anti-clockwise: OFF.

LCD. The liquid crystal display (LCD) can display four rows of forty alpha- numeric characters. The display is fitted with an electro-luminescent backlight, and the contrast between the displayed characters and the background can be varied to suit viewing angle. Rows 1 to 4 are numbered from top to bottom.

Soft keys. The soft keys select parameters for modification. Parameters are assigned to the soft keys according to which 'configuration key' is selected. Row 4 of the LCD displays the soft key assignments. Selection of a soft key enables the value/state of the associated parameter to be changed.

[1] Step keys. The step-up and step-down keys are used primarily for changing the

value of a parameter by a preset amount. The step sizes for frequency, power and time can be set by the operator.

Note...

In operating procedures in this manual the following conventions are used

to identify control functions:

Square brackets e.g. [PROG] indicates a front key title.

Bold face e.g.

to an LCD parameter.

TIME

indicates a soft key designation or a functional reference

•

ITJ

Rotary control. Fine adjustments may be made to a parameter value using the

rotary control. The sensitivity of the control depends on the speed with which it rotates.

The faster the control is turned, the greater is the change in value.

46881-852A Aug. 89

3-1

Page 18

LOCAL OPERATION

[§] SHIFT key. Accesses the shifted functions, which are indicated in blue in the

upper halves of certain keys. The SHIFT key remains active until another key is pressed, and this is indicated by the illumination of an integral LED.

[1] RF key. Switches RF power on/off. The LED is illuminated when RF is on.

MEMORY key. Provides access to 20 non-volatile store/recall memories, each capable of storing complete sweeper settings. Also used to access default settings and to define power-on state.

[2] LOCAL key. Returns the sweeper to front panel operation from GPID control.

This key can be disabled by the 'local lockout' message from an external controller.

[1Ql

Sweep configuration keys.

display and modification.

[!]

User programmable configuration keys.

user-defined configurations.

Select sweep modes and associated parameters for

May be programmed with up to six

[ll]

Auxiliary configuration keys (Shifted functions).

such as step sizes, markers, GPIB addresses etc.

Notes ...

TEST and CAL are considered separately from the configuration keys. See Appendix D : SELF TEST and Chap. 3-5, CALIBRATION.

PROG is considered with the user programmable configuration keys (Chap. 3-2).

[UJ

Numeric keys (Unshifted functions). Used for entering values of numeric

parameters, and other number entries.

~ Units keys. Define units of numeric parameters and terminates numeric entry.

RF OUTPUT (Precision type MPC 3.5 connector).

CAUTION •..

~ This connector maybe damaged if mated with a non-precision type MPC 3.5 or

SMA male connectors.

[lli

EXT LEVEL (BNC). Input for external levelling signal.

Select auxiliary configurations

3-2

46881-852A

Aug. 89

Page 19

I I I I

LOCAL OPERA,TION

REAR PANEL CONNECTIONS

Fig.

3-2

[JJ

[1]

GPIB allows remote programming using an external controller; the PRIVATE GPID allows the sweeper to control a counter and power meter during auto-calibration or a Automatic Analyzer and plotter to form a scalar measurement system.

CAUTION - GPIB INTERFACES

There are two GPIB interfaces located on the rear panel of this equipment. The

SYSTEM GPIB interface is intended for connection to an external controller.

Under no circumstances should a GPm controller be connected to the PRIV ATE

GPIB interface, otherwise damage might result to both controller and sweeper.

FOOTSWITCH (BNe). Input for optional footswitch control connected, the footswitch can be used to change the parameter associated with soft key number 4, thus leaving the hands free for other purposes. A useful application is to use the footswitch to switch between the current sweep and a stored sweep while adjusting the device-under-test. See "Alternate sweep selection".

[l]

AM the carrier frequency. The modulation characteristic is non-linear.

[i]

Fl\1 i/p (ENe). This can be used to frequency modulate the sweeper carrier frequency. The sensitivity is -6 applications, e.g. using an external locking counter to enhance the stability of the

sweeper.

connectors.

i/p

(BNe). This can be used for small signal amplitude modulation of

The sweeper has two GPIB interfaces: The SYSTEM GPIB

MHzN

Rear panel

6500

06313-006T.

so that the sweeper may be used in phase locking

When

STOP S\VP i/p (BNe). A TTL compatible logical the forward sweep to pause'. The sweep resumes when a logical

applied.

[§] SWEEP

operate with external sweep.

46881-8S2A Aug. 89

i/p

(BNe). Accepts 0 to

+10

V tuning voltage when the sweeper is set to

'0'

applied to this input causes

'1'

(or open-circuit) is

3-3

Page 20

LOCAL OPERATION

[1]

[§] SYNC

[2] S'VEEP o/p (ENC). Outputs an 0 to

[lQJ

1 V/GHz o/p

o/p

Analyzer.

RF output. 0 V corresponds to the lower (FI) and 10 V to the upper eF2) frequency limit.

AUXILIARY FUNCTIONS connector. IS-way 'D' type.

2 3 4

7 GND

8 9

10 11 12 13 14

15 GND

(ENC). Voltage proportional to output frequency.

(BNC). Synchronization signal for use with 6500 Automatic Amplitude

10 V signal proportional to the swept or CW

Function

STOP SWP i/p GND +5 V FROG 1 PROG 3

FROG

GND SYNC alp

PULSE Up EXT TRIG ill'

PROG 2 PROG 4 CTR TRIG olp

Notes

Stop sweep. Also available on BNC connector

Set high during sweep retrace Not currently assigned 'Blips' at reference marker frequency

Also available on BNC connector Pulse modulation input

Firmware produces 'blip' once per second Not currently assigned Counter trigger output

The PULSE i/p is TTL compatible. '0' represents RF off and '1' represents RF on. See "Performance Data" in Chap. 1 for details of pulse modulation.

The EXT TRIG i/p is TTL compatible. When external sweep trigger mode is

selected, the sweep is triggered by a high-to-Iow transition applied to this input.

The CTR TRIG olp provides a trigger pulse to a counter to initiate a frequency measurement. Appendix C describes interfacing suitable counters, including the Marconi Instruments type 2442.

[TIJ

FUSES. For protection of live and neutral lines of the supply input. See Chap. 2,

Installation, for details.

I11l

LINE VOLTS INPUT plug. Accepts AC supply voltage input via lead No.

43129-071D.

[U]

LINE VOLTS SELECTOR. Selects AC supply voltage range. See Chap. 2,

Installation, for details.

~ AIR OUTLET. Do not obstruct.

L t

(

3-4

46881-852A

Aug. 89

Page 21

LOCAL OPERJ,\.TION .

AMPLITUDE ANALYSIS : GETTING STARTED

(1) 6500 users who are impatient to begin testing may start here.

(2) The 6500 analyzer and 6313 sweeper should be connected as shown in Fig. 3-3 below. If a plot of 6500 results is required, an HP-GL (Hewlett-Packard Graphics Language) compatible digital plotter should also be connected as indicated.

(3) Ensure that the 6500 GPIB address is set to 8, the plotter address to 5.

FIXED O-lOV

RAMP

SYNC

6500

PLOTTER

I I I I I

GPIB ADDRESS

GPIB ADDRESS 5

.7'} ~

~----------------~

PRIVATE

SYNC PROGRAMMABLE

O/P SWEEP

SWEEP liP

Fig.

(4) Switch on the 6500 and the sweeper. Select ~

press the init soft key. This initializes all devices connected to the PRlVA1E bus. Initialization of the 6500 takes approximately 13 seconds including detector zero.

GENERATOR

3-3

Connections to 6500 and plotter

S~T ~

I::~I

on the sweeper and

SLOPE

(5) Press the

6500. The display should be as shown.

(6) To change FI (start frequency), F2 (stop frequency), PI (RF power level) or (sweep time) press the appropriate soft key and use the rotary control, step keys or

numeric keys (with appropriate units terminator) to adjust the value.

46881-852A

Aug. 89

F1-F2

P1 0.00dBI"I

key on the sweeper to define the sweep range for both sweeper and

1 10. 0MHz

F2 26.

500~3GHz

ME 10~1,,)s

TIME

3-5

Page 22

LOCAL OPERATION

(7)

Press

on the 6313 to switch on the RF power.

(8) The normalization procedures required to prepare the 6500 to make measurements will be familiar to existing users. New users should consult the 6500 Operating Manual. Full details of the operation of the 6313 with the 6500 are given in Chapter 3-4.

SWITCH-ON CONDITIONS

When the sweeper is first switched on a display of the following form is shown:

GEtlERIC

Seri el

10 MHz - 26.5 GHz Sweep Generator 6313

Row 1 shows the latest firmware issue number (including the part number).

Row 2 shows the serial number of the sweeper. Row 3 identifies the sweeper as a 6313_

This is followed by a display showing the results of a check on the integrity of the data stored in all sections of the non-volatile memory. If all sections check out correctly the following message is momentarily displayed:

FIRt'II,JRF:E

Hur'.bet"-

ISSUE 3 44533.31'.:,5

108

***

t'1Et'10RVTEST

*:.1<>1<

[--------------------------------------]

NO FRULTS DETECTED

If any memory sections are found to have been corrupted a message of the form

shown below is (permanently) displayed:

**>1<

MEMORY TEST

[R-----GHI-------QR-----------def------]

FRIJL T (S)

PRESS

For interpretation of a fault message see APPENDIX D : SELF TEST.

After the memory test has been completed, the sweeper will normally set itself to

the PRESET operating conditions, with RF power switched off:

Fl 1~.0MHz F2 26.5000GHz TIME 100Ms

Pi 0.lj0dBI'".

OETECTE[> :

RNV CONFIGURRT

REFEF.:

ION KEV

.:.

F-'

>1<**

~1RNURL

TO CaNT I ~-lUE

TI~1E

Any newly delivered sweeper should set itself to these conditions. It is possible, however, to cause the sweeper to power-up with the settings at power-down, or to the settings stored in one of the 20 non-volatile memories. A deviation from the PRESET conditions does not, therefore, necessarily imply that there is a fault. See "Memory Facilities" later in this chapter for details.

46881-852A

Aug.

3-6

Page 23

LOCAL OPERATION

DISPLA Y STATUS FIELD

During normal operation of the sweeper, the status field is displayed at the left

hand side of row 4 of the LCD. There are four components of the status field:

I I I I I

Operating mode System GPID status

Calibration selected -------- Unlevelled indication -----------'

+L 'I:

1 II

UNLU

Operating mode

The symbol indicates one of four possible operating modes:

CW operation

+ Swept operation (Levelled output power)

,. Swept operation (Power slope)

Power sweep

System

or Remote and the lower character indicates whether the sweeper is addressed to listen, addressed to talk, or unaddressed.

GPIS

The character cell is divided into two halves. The upper character indicates Local

loT

status

Local operation (Unaddressed) Local operation (Addressed to listen) Local operation (Addressed to talk) Remote operation (Unaddressed) Remote operation (Addressed to listen) Remote operation (Addressed to talk)

Calibration selection

The character indicates whether the Primary calibration, a User calibration or a

Limited calibration is selected. Refer to Chap. 3-5.

p~ Primary calibration selected

User calibration selected (User 1)

User calibration selected (User 2)

Limited calibration selected (Limited 1)

Limited calibration selected (Limited 2)

A flashing calibration symbol indicates that the selected calibration data has been over-

written with default data.

Unlevelled indication

When the output power is calibrated the field of four characters is blank.

power becomes unlevelled, UNLV is displayed. UNLV is also displayed when RF is switched off.

46881-852A

Aug. 89

the

3-7

Page 24

LOCAL OPERATION

(

PARAMETERS AND CONFIGURATIONS (GENERAL)

Parameters

The operating parameters of the 6313 are the settings of the instrument which the

operator can change (in value or state) to define its operation"'. Examples include Start

Frequency

(mk_stp).

Parameters are either 'numeric' or 'non-numeric'.

parameters is given in APPENDIX A.

Numeric parameters

Numeric parameters are those which take a numerical value. Examples include

Start Frequency (FI), Private GPIB Address (P_AD DR) and Start Power Level (PI).

Numeric parameters are shown in upper-case letters on the display.

Non-numeric parameters

Non-numeric parameters may take up one of a few defined states. Examples include CW Filter (filter) which can be either 'on' or 'off'; and Sweep Trigger (swp_tr) which has the states 'int', 'ext', 'line' and 'single'.

(Fl),

Sweep Time (TIME), System GPIB address (S_ADDR) and Stop Marker

A full list of the 6313's

Non-numeric parameters are shown in lower case letters on the display.

Configurations

Configurations are groups of related parameters which together define some

aspect(s) of the sweeper's operation.

Configurations are selected by the 'configuration keys' which are shown in Fig. 3-4

below.

The configuration keys may be sub-divided into three groups:

Those in the top row of the MODE/OUTPUT section of the front panel are the 'Sweep Configuration' keys.

Those in the second row of the MODE/OUTPUT section are the 'User Programmable Configuration' keys.

Those in the FUNCTIONIDATA section are the 'Auxiliary Configuration' keys.

[

3-8

There are in addition certain 'display-only', 'soft key only' and 'diagnostic'

parameters. See 'STATUS 2'and 'PRIVATE' (this chapter) and also APPENDIX A.

46881-852A

Aug. 89

Page 25

LOCAL OPERATION

I I

FUNCTJON/DA TA

r30D

DDD Boc:JB

BBB

ODD

Fig.

3-4

B B B B

Configuration keys

--- MODE/OUTPUT ----

SLOPE SLOPE

Fl-

II CF-.:lFI

PROG 5

PROG 1

PROG

RF OUTPUT EXT LEVEL

~ precision

~ connector

PROG 6

PROG

I I

Configuration selection and display

When a configuration key is pressed, the current values/states of its associated

parameters are displayed in rows 1, 2 and 3 of the display.

In row 4 the symbol of each (changeable) parameter is displayed above a 'soft' key.

For example, selecting the [FI-F2] key should give a display like this:

Fl 10.0MHz F2 26.500BGHz TIME

A parameter's value or state can then be changed by first selecting the soft key to

which it has been assigned.

00dBr',

lOOMS

TII'1E

46881-852A

Aug. 89

3-9

Page 26

LOCAL OPERATION

Changing numeric parameter values

When a soft key assigned to a numeric parameter is pressed, the soft key label

flashes to indicate that numeric entry is enabled for that parameter. A numeric entry field prompt •[ )' appears on the left of row 3.

F1 10. 0t1Hz F2 26. 5000GHz TI ~1E

P1 e.(10dBM

[]

As digits are entered they are displayed in the numeric entry field:-

Fi Pi

[12.345J

of"

10.0MHz

l30d8r·)

·-,

..:..

26. 5000GHz

F"l

Tlt1E

l00MS

TIME

ll~H3r"ls

Tlt1E

Numeric entry terminators

Numeric entries are terminated using a units key appropriate to the type of parameter. Frequency input is terminated using the {GHz], [MHz] or [kHz] keys; power input using the [dBm/mW] key; sweep time input using the [s] or [ms] keys. The [int] terminator is used when entering integer values such as a GPIB address. When the numeric input is terminated the new value is assigned to the parameter and the numeric entry field is cleared. The soft key label continues to flash, indicating that a further numeric entry may be started.

F 1 12. 3450J3Hz F2 26. 5001lGHz TI ME P1 O. OOdBr'l

[]

1001'1:=,

T It'lE

(

[

Step keys and rotary control

The step keys and rotary control may be used whenever numeric entry is enabled.

The step size is definable for each type of numeric parameter: for frequency, power

(dBm), power (mW), and time, using the the value of the parameter is incremented or decremented as appropriate. If a step key is held down it repeats automatically.

The rotary control sensitivity depends on the speed of rotation. A rapid twist to the

control results in a large change to the parameter. Slow rotation allows fine adjustments

to be made.

Operating the rotary control or step keys has no effect on any pending numeric

entry displayed in the numeric entry field.

3-10

!!l

configuration. When a step key is pressed,

46881-852A

Aug. 89

{

(

Page 27

LOCAL OPERATION

limits

Every numeric parameter has a maximum and minimum permitted value. If an

attempt is made to enter a value outside this range, a

momentarily on row 3 of the LCD and the parameter is set to the nearest allowed value, either maximum or minimum as appropriate.

LIl\1IT

message is displayed

-+"

10.0MHz

G.00dS!')

F2 26.6000GHz

Fl F2 PI

LIMIT

TIME

100MS

TIl'lE

Changing non-numeric parameters

When a soft key assigned to a non-numeric parameter is pressed. the value of the parameter changes to another state, as shown below. If the key is pressed repeatedly, the parameter cycles through all its possible states.

For example the CW configuration includes two non-numeric parameters, filter and vernier. Both of these have two allowed states: off and on. Initially both of these parameters are off:

L;F

13.2550GHz

0.u0dBI'l

Effect of pressing the filter soft key:

CF 13.2550GHz

13.

00dBfli

t.er-

filt.ep off t,.·'er·niet'

tet' IJn

vetYlier' off

off

filt.er·

Further presses of the filter soft key causes toggling between the off and on states.

Changes to non-numeric parameters have no effect on any pending entry displayed in the numeric entry field.

Programmable keys

The three programmable keys [PROG

[PROG 4] to [PROG 6]) belong to the class of configuration keys. In these cases,

however, the configurations are defined by the operator. Refer to Chap. 3-2.

46881-852A Aug. 89

to [PROG 3] (with shifted functions

3-11

Page 28

LOCAL OPERATION

SWEEP CONFIGURATIONS

Changes between sweep configurations involve changes in operating mode, except

where the configurations differ only in the definition of the frequency sweep: (F1-F2) or

(CF-llF).

When a sweep configuration key that involves frequency or power sweeping (i.e. all

except CW) is pressed you will notice a momentary pause in the sweep. This is due to

the digital correction values for the sweep being recalculated.

The sweep is also halted momentarily when new parameter values are entered.

Swept operation (Levelled output power) (F1-F2)

SLOPE

FH2

Fl 10.0MHz F2 26.5000GHz TIME l00MS

P1 O.00d81")

TIME

Range

TIME

Notes ...

Start frequency

Stop frequency 2 MHz to 26.6 GHz

Power level (dBm)

Forward sweep time

2 MHz to 26.6 GHz

-]5

+20

dBm

ms to 33.5 s

The specified frequency range and levelled power range for the sweeper are given in the Performance Data section of Chapter 1. Notice that the allowed ranges (given above) are greater than those specified. Frequencies and power levels both above and below the specified limits may be entered, to ensure that the specified limits are in fact obtained, and to allow extended usage.

RF output sweeps from Sweeps from high to low frequency are not permitted. If

frequency than

F2,

F2.

to a lower frequency than

Fl.

both

is set to a higher

and

are adjusted

to the last entered frequency. Power may also be set in mW by use of a programmable key configuration. See

Chap. 3-2 "Programmable Keys" for details.

3-12

46881-852A

Aug. 89

Page 29

LOCAL OPERATION'

Swept operation (Levelled output power)

~~ ~~

CF 13.2550GHz eF 26.4900GHz

F'1 0. e0dBr·)

TIME

Centre frequency

Frequency span

Power level (dBm)

Forward sweep time

TH1E

leer'ls

TINE

(CF-boF)

Range

2 MHz to 26.6 GHz

to 26.598 GHz

-15 to +20 dBm

10 ms to 33.5 s

Notes •••

RF output sweeps from CF - The values of CF, b.F, F1 and F2 are interdependent. A change in the value of any

one of these parameters will cause changes in the others, in accordance with the equations:

If the centre frequency is adjusted past a point where either limit or

symmetrical sweep.

If CF is subsequently moved away from the band edge, 6F increases towards its

'remembered' original value. Note that the 'remembered' ~F value is lost if either

a new configuration is selected or an explicit change is made to boF.

reaches its upper limit, the value of ~F is reduced to maintain a

boF/2

CF ::;

boF

to CF +

(Fl

F2 - Fl

~F/2.

F2)/2

reaches its lower

46881-852A

Aug. 89

3-13

Page 30

CW operation

CF 13.2550GHz

00dBr;.

PI:

LOCAL OPERATION

fi1

t.l?t-·

off

vern

€or·

of'f'

1let'

Range

filter CW filter:

vernier Frequency vernier control

Notes ...

Frequency parameters may be set to a resolution of 500 kHz during normal operation. When the vernier is enabled, CF,

10kHz over a range of approximately ±20 MHz.

If altering

RF output frequency

off Filter off on Filter on

Power level (dBm)

off Vernier off

on Vernier on

or F2, both values will change when the vernier is enabled.

2 MHz to 26.6 GHz

-15

+20

may be set to a resolution of

dBm

[

(

{

The filter is used to reduce the YIG oscillator tuning bandwidth and lower the residual FM to the values specified in the Performance Data section of Chapter 1.

46881-852A

3-14 Aug. 89 \

(

Page 31

Swept operation (Power slope) (F1-F2)

k£d~

LOCAL OPERATION

F1 10. m1Hz F2 26. PI

SLP

TIME

Notes ...

In power stope mode the RF output power increases with frequency, a typical use for

which is to compensate for high frequency losses in RF cables.

0.00d81"1

Start frequency 2

Stop frequency

Power slope

Forward sweep time

Start power (Power level at

SLP 0. 00d8/GHz

5000GHz

5LP

TI~lE

1001"15

TIME

F1) -15

Range

1lliZ

2 MHz to 26.6 GHz

to 20.0

10 ms to 33.5 s

to 26.6 GHz

dB/GHz

to +20 dBm

The start power one of the levelled sweep configurations. Alternatively, this configuration could be used as the basis for a user-programmed configuration in which the meter replaces one of the four controllable parameters (for example Chapter 3-2, Programmable keys, for details.

The

SLP

setting is terminated with the [dBmJ key.

46881-852A

Aug. 89

cannot be changed in this configuration and should be set using

TIME).

para-

See

3-15

Page 32

LOCAL OPERATION

Swept operation (Power slope) (CF-.6F)

CF 13.2SS0GHz ~F 26.4900GHz TIME 10e~s

P1 0.00d8f') SLP 0.00d8/GHz

CF ~F

SLP

TIME

Centre frequency Frequency span Power slope Forward sweep time Start power (Power level at F1)

(dB/GHz)

SLP

TI~lE

Range

2 MHz to 26.6 GHz

to 20.598 GHz

to 20.0 dB/GHz

10 ms to 33.5 s

-15 to +20 dBm

[

Notes ...

In power slope mode the RF output power increases with frequency, a typical use for which is to compensate for high frequency losses in RF cables.

The start power PI cannot be changed in this configuration and should be set using one of the levelled sweep configurations. Alternatively, this configuration could be used as the basis for a user-programmed configuration in which the PI para- meter replaces one of the four controllable parameters (for example Chapter 3-2, Programmable keys, for details.

The SLP setting is terminated with the [dBm] key.

TIME).

See

[

3-16

46881-852A

Aug. 89

Page 33

Power sweep

~~ ~~

LOCAL OPERATION

I I

CF 13.255~~Hz filter on TIME P1 a.00dBM P2 +5.00dB~

TIME

filter

Note ...

RF output frequency

Start power (dBm)

Stop power (dBm)

Sweep time

CW filter

off

Filter off Filter on

F'2

lOOMS

rrne

Range

2 WIz

-15 to +20 dBm

26.6 GHz

to 33.5

The filter setting should be selected using the CW configuration.

46881-8S2A

Aug. 89

3-17

Page 34

LOCAL OPERATION·

AUXILIARY CONFIGURATIONS

No change to the operating mode occurs when an auxiliary configuration is selected.

Status 1 display

States of the non-numeric parameters are selected by successive presses of the soft keys.

rn~

bldnk ret..rac·e

dr'1 off

blank

ale.

Selects RF blanking

ale.int.

A~LFREQ 1•

(11:;

off No RF blanking retrace RF blanking during sweep retrace

ale Automatic Level Control

Selects internal or external RF power levelling int Internal levelling selected

ext+ External detector

(s-ve

output) ext- External detector (-ve output) mtr Power meter levelling

am Selects internal square wave amplitude modulation

off Amplitude modulation off on Amplitude modulation on

AM_FREQ Amplitude modulation frequency (range 1.0 to 100 kHz)

3-18

46881-852A

Aug. 89

Page 35

LOCAL OPERATION

Notes ••.

Retrace blanking is not permitted when external sweep is selected.

During normal operation, the RF output will be blanked whilst parameter values are

changed. This is to prevent undefined output as the hardware is updated. For applications where it is undesirable for the RF to be blanked during alteration of sweeper parameters, it is possible to set the sweeper such that RF is always present even though its level may be undefined. The parameter rCon is available using the Programmable keys and can be set either to normal for normal operation (RF blanked when parameters change) or to always for RF to be enabled continuously, unless specifically switched off by the user. Refer to Chapter

3-2

for details. It should be noted that when blank is set to retrace, rCon is set to normal. Conversely, when rCon is set to always, blank will be set to off.

The external detector's output or the power meter's levelling output (range 0 to 1 V in both cases) should be connected to the EXT LEVEL input on the front panel.

Appropriate correction data is applied to each type of automatic level control. For internal levelling, this is the power calibration data held in the selected calibration store. For external and power meter levelling default data is applied which removes the compensation for the internal detector.

The current correction data will be overwritten by new data (as outlined above) as soon as alc is changed. Therefore, if a calibration store contains data collected using external levelling and it is required to select this data, it is necessary first to select the correct external

If for any reason a change is made to the

ale

state and then the appropriate calibration store.

ale

'state the calibration store must also be

re-selected.

flashing calibration symbolinthe status field indicates that default data is being

used.

46881-852A

Aug. 89

3-19

Page 36

LOCAL OPERATION

Status 2 display

rn~

5_ADDR 20 P

_R[')CIF~

S ADDR System GPIB address

P_ADDR Private GPIB address CONTRST Adjusts LCD contrast to suit viewing angle OP HRS Total instrument operating hours

CDNTRST 10 OP_HRS

CDNTI':ST

Range

to 30

to 20

L l

Notes ...

Refer to the GPIB Operating Manual for details of system GPIB operation and the significance of the GPIB addresses.

The sweeper powers-up with CONTRST set to a value of 10, this being the mid- way value between the minimum value 1 and maximum value 20. Under normal conditions this range is sufficient to enable a clear display when viewed from most angles. However, under certain conditions, for instance extremes of temperature, this range might not provide the required contrast. To overcome this, it is possible to alter the range by changing the contrast associated with a value of 10. The method is as follows:

(1) Adjust CONfRST control to bring the display to the required power-up

contrast.

(2) Enter 999 into the numeric entry field, terminating with the [kHz/int]

key. A

(3) Switch the sweeper off then on again. The display contrast will be as set in

(1). This new contrast level corresponds to value

subsequent power-up.

*LIMIT*

warning message will be displayed.

10.

and will apply at each •

(

3-20

46881-852A

Aug. 89

Page 37

SweeplTrigger selection

~§

~l;d

LOCAL OPERATION

I I

::.u1eE'F· ext.

.s·_S·l,II'·

sweep

£.~w_

t.rint.

nac:1..iI,'","

Selects internal or external sweep

int

ext

Selects method of sweep triggering

int

ext

line

single

Initiates sweep when single sweep triggering selected

c.ntr·_t..r- off

Internal sweep selected. TDvIE parameter determines sweep time. External sweep selected. Rear panel SWEEP i/p connector accepts 0 to +10 V tuning voltage.

Internal triggering. External triggering. Sweep triggered by logical

transition applied to EXT TRIG (pin AUXILIARY FUNCTIONS connector) Trigger synchronized to power line frequency Sweep initiated by pressing soft key assigned to

the s_swp parameter

of rear panel

to logical

cntr tr

46881-852A

Aug. 89

inactive

ready sweeping

Selects counter trigger option for use with an external frequency counter

off

fl f2

Single sweep triggering disabled Sweep may be initiated by pressing soft key Sweep in progress

Counter trigger off Counter triggered at start frequency Counter triggered at stop frequency Counter triggered at reference marker frequency

3-21

•

Page 38

Notes ...

The default settings are:

sweep - int swp_tr - int s_swp - inactive cntr jr - off

LOCAL OPERATION

If external sweep is selected (e.g. for use with 6500) it is only possible to select internal triggering. Conversely, unless internal triggering is selected possible to select external sweep.

The counter trigger facility allows frequency measurements to be made while operating in a swept frequency mode. At a point in the sweep specified by the cntr_tr parameter, the sweeper generates a trigger pulse .. The counter responds by generating a STOP SWP signal of sufficient duration for a count to be acquired. The

counter trigger operates only when internal sweep is selected.

Appendix C describes counter interfacing.

is not

L L

3-22

(

[

46881-852A

Aug. 89

Page 39

Marker select

~~ ~~

R 13.2550GHz 8 13.2550GHz E 13.2550GHz C 13.2550GHz D 13.2550GHz ~k_ref R

f')k,.._on -----

~~~ ~k_ref MK_FREQ Mk_on on/off

Soft keys

mk ref Selects one of the 5 markers, A,B,C,D or E to be the reference

marker, thereby enabling its frequency to be changed

LOCAL OPERATION

MK_FREQ When selected (flashing) the frequency of the reference marker

can be changed (range 2 Ml-lz to 26.6 GHz)

onloff Switches all markers on/off

Displays

A,B,C,D,E

mk ref

mks on

Switches the reference marker onloff

Marker labels. The current frequency is shown adjacently.

Reference marker. The appropriate label is displayed.

Displays the on/off status of all5markers. The presence of the marker label indicates that the marker is on; a dash indicates that the marker is off.

Notes ...

Markers are useful in amplitude analysis systems. See Chapter 3-4 for details of

operation with the 6500 Automatic Amplitude Analyzer.

This configuration allows the five markers to be switched on or off and their frequencies set. To change the frequency of a particular marker, or switch it on, it must first be made the reference marker.

The reference marker frequency is the start point for the marker sweep. An 'on' marker appears as a dip of approximately 5 dB in the RF output power at

the marker frequency.

46881-852A

Aug. 89

3-23

Page 40

Marker sweep

rn~

'--'

A 2.0000GHz 8 3.5000GHz

5.00(1(tGHz [,7.125(1GHz

-t~

UNLLI r·)k_ref

1.5000GHz

I'lk_swp off I'lk_st.p B

I'lk_st,p •.•.,k_£.\.Jp

I'lk_r'ef

t.r·a

t1S.f't-·

LOCAL OPERATION

Soft keys

mk ref

transfr

Displays

A,B,C,D

~ Indicates the frequency difference between the reference and stop

Selects one of the 5 markers, A,B,C,D or E to be the reference marker

Selects one of the 5 markers, A,B,C,D or E to be the stop marker during marker sweeps

Activates frequency sweep between the reference and stop markers. on Marker sweep on

off Marker sweep off Makes the marker sweep permanent by assigning the current

reference and stop marker frequencies to FI and F2

Markers labels. The current frequency is shown adjacently.

markers (Range 0 to 26.598 GHz)

ref Reference marker. The appropriate label is displayed.

Stop marker. The appropriate label is displayed.

Notes ...

Although it is not displayed in this configuration, marker E may be the reference or stop marker.

A non-numeric parameter is available for setting the centre frequency CF to the reference marker frequency. If this facility is required, a programmable key con- figuration should be created in which the cf=ref parameter is assigned to one of the soft keys. Refer to Chap. 3-2.

3-24

(

46881-852A

Aug. 89

Page 41

Parameter step size selection

l!.

5~(1.

0l1-Hz

Til.

10''''$

.;.L

PI:

FI!.

P6(r'lIJ) PMdB) T~

(''11

F'lJ.(d8)

.,.1::'

1. ejl30r'11~

+1.

LOCAL OPERATION

00dB

Range

P~(mW)

P~(dB)

Notes ...

Frequency step 500 kHz to 10 GHz Power step (mW) Power step (dB) Time step

0.1 mW to 20 mW

0.0 dB to 5.0 dB 1 ms to 10 s

Only integer multiples of the minimum step size are allowed This configuration is used to program the step size for each type of numeric

parameter.

The step size for the 'integer' parameters (GPIB address, LCD contrast, etc.) may

also be changed from its default setting of 1. To do this it is necessary to use the programmable keys. Refer to Chap. 3-2.

P~(m\V)

allows the step size of the Power (mW) parameters to be changed. The Power (mW) parameters are not found in any of the standard configurations but may be employed in a user defined configuration assigned to one of the pro- grammable keys. Refer to Chap. 3-2.

46881-852A

Aug. 89

3-25

Page 42

LOCAL OPERATION

Date (clock/calendar selection)

13:05:1709:MRY:1988

H M

MTH

Notes •..

Specifies the hour of the day Specifies the minute of the hour Specifies the day of the month Specifies the month of the year

MTH

Range

to 23

to 59

1 to 31

1 to 12

I-

Seconds may be set with the "S" parameter and the year with the "YR" parameter via the Programmable keys. Refer to Chap. 3-2 ..

Although the month is displayed as a three letter abbreviation, it is set using the numerical representation 1 to 12, or by cycling through the months using the rotary control or step keys. The day, month and year parameters are held in the instrument's non-volatile memory and will thus "remember" their last value but will not be affected initialized to 00:00:00 at power on.

When the sweeper forms part of a scalar analysis system and the digital plot facility is being used, the time and date will appear in the bottom right hand corner of the plot in the format

disable plotting of the DATE using an option in the Plotter menu. It should be noted that the default is to have DATE plotting enabled. Refer to Chap. 3-4.

Two additional clock parameters log the total instrument operating hours

COP

_HRS, available via STATUS 2) and user operating hours (USR_HRS), the latter being resettable. These integer parameters are listed in Table A-5 of Appendix A and are available via the Programmable keys. Refer to Chap. 3-2.

a memory recall operation. Hours, minutes and seconds will be

illI:MM

DD:MMM:YR, e.g. 13:05 09:MA Y:88. It is possible to

3-26

46881-852A

Aug. 89

Page 43

Private GPIB status

~ PRIVATE

LOCAL OPERATION

~ II

ana lssr-I

count.er-

init

analysr[8]

counter[6]

plotter[5]

LOCAL

t:]

[Eo]

off

cd~f

init.

PI.o.W-_f")t...r-[9J

F-lc.U-e-d5] off

Initialize private GPm

devicel

indicates the expected address of a device connected

to the Private GPIB. thus:

6500 Automatic Amplitude Analyzer expected at address 8

Counter expected at address

Power meter expected at address 9

Plotter expected at address

off

on off Device not present

Note ...

At power on, following selection of calibration (see Chap.

3-5),

the private GPIB and sets off accordingly.

Device present

expected address

init

or after pressing the CAL softkey during

the sweeper determines which devices are present on

analysr[8],

counter[6].

pwr

mtr[9]

and

plotter[S]

46881-852A

Aug. 89

3-27

Page 44

Alternate sweep selection

LOCAL OPERATION

~~ ~~

~'==~===,===============~====~====~

RL T_~lEM 1

This configuration provides alternate sweep facilities.

ALT MEM

altern

Specifies the memory to be used for alternate sweep. Range is 0 to 20; 0 is current setting, 1.to 20 are user defined settings.

Selects alternate sweep off Alternate sweep disabled man

alt.e-r-n otT f'lat-l_al

Alternation between current sweeper settings and those

in the specified memory is actioned manually by pressing a soft key assigned to the man_alt parameter

t._

c-L~r·r·e-nt..

;..L

auto

man all

Note ...

Automatic alternate sweep is not permitted when the sweeper is set for external sweep. Manually switched alternate sweep is primarily intended for use with the 6500 Automatic Amplitude Analyzer.

allows manual switching between current sweeper settings and those in the specified memory when altern is set to man.

current Sweeper operates using current settings memory Sweeper operates using the settings stored in the

Alternation between current sweeper settings and those in the specified memory occurs automatically at the end of each sweep

memory specified by

ALT_MEM

1 " \

3-28

46881-852A

Aug. 89

Page 45

MEMORY FACILITIES

See Chapter 3-4 for details of memory operation with the 6500.

LOCAL OPERATION

FUNCTIONIDATA

BBB BBB

BBB

B B

1nl

Fig.

3-5

The sweeper has twenty non-volatile memories, each capable of storing the com- plete instrument settings. The [MEMORY] key provides access to the memories. allowing their contents to be reviewed and recalled, and allowing new contents to be stored. Additionally, the sweeper's state at power-on can be defined.

Location oj MEMORY

BBB B

IB8~1

key

and associated controls

I I I

•

Following selection of the [MEMORY] key, the contents of the last accessed memory (MEMORY 1 at first access from power-up) are displayed as shown below.

F1 1O.0NHz F2 26.5000GHz

F'1

Note that the configuration displayed when reviewing the memories will be which- ever configuration was displayed at the time of storage. However, all valid parameters are affected when a memory is recalled.

Parameter values are affected in three distinct ways when a memory recall operation is performed.

Firstly, the values for parameters held in non-volatile memory are retrieved. Such parameters are listed in Appendix B, Table B-1.

46881-852A

Aug.

OOdBr1

~lEl'l 1 STORE RECRLL

THlE

POl,JER-OH EXIT

lOOMS

3-29

Page 46

LOCAL OPERATION

Secondly, the values of some parameters are not affected by recall operations. Such

parameters are listed in Appendix B, Table B-2.

Thirdly, certain parameters will be set to a "default" value. Such parameters are

listed in Appendix B, Table B-3.

Memory reviewing

RF power is switched off as a safety precaution when the [MEMORY] key is

selected. In this way, the contents of each of the sweeper's memories can be reviewed

(using the step keys or rotary control) without changing the output characteristics. If RF is switched back remain active. A specific memory may also be examined by entering the appropriate memory number terminated by the [klIz/int] key. The selected memory's number is located on row 4 directly above the step keys, next to the operating mode symbol.

In addition to the twenty storelrecall memories there is also a "recall only" memory, designated PRESET. This contains the standard switch-on conditions, and is useful for overwriting the contents of the other memories at the end of an operating

session should erasure be desirable for security reasons. The PRESET parameter values are listed in Appendix B, Table B-4.

on,

the sweep selected prior to selection of [MEMORY] will be found to

Soft key assignments

STORE Overwrites the displayed memory with the current sweeper

settings. It is not possible to overwrite the contents of the PRESET memory. As selection of [MEMORY] switches RF off, it is necessary to switchiton again before pressing STORE, if it is required that RF is on when the memory is recalled.

RECALL POWER-ON EXIT

Power-on

The sweeper status following power-on may be set to one of the following three alternatives:

The contents of one of the 20 memories.

Recalls the displayed memory contents. Specifies the sweeper's state following power on. See below. Leaves memory menu, returns to the previous configuration.

( J

~ MEM 7 SELECT

[

The PRESET state.

The PWR-DOWN state (the state immediately prior to power-down).

The rotary control, step keys or numeric keys allow the desired memory number,

PRESET or PWR-DOWN to be selected.

3-30

46881-852A

Aug. 89

Page 47

LOCAL OPERATION

SELECT

EXIT

Assigns the power-on setting. Returns to memory menu.

TEST AND CAL KEYS

The operation of the [TEST] key is described in APPENDIX D : SELF TEST. The operation of the [CAL] key is described in Chap. 3-5 : CALIBRATION.

46881-852A

Aug. 89

3-31

Page 48

This page intentionally left blank

LOCAL OPERATION

3-32

46881-852A

Aug. 89

[

Page 49

PROGRAMMABLE KEYS

r------

FUNCTION/DATA ----- •..••...•

BBB BBB BBB BBD

Chapter

PROGRAMMABLE KEYS

3-2

.--- MODE/OUTPUT ---

BBB

PROG

IlpROG

RF OUTPUT

Jj\

~ connector

precision

DROG

IIPAOG

PROG

7.1

[pROGl

EXT LEVEL

IBBDI

Fig.

3-6

OVERVIEW

The programmable keys may be programmed with up to six operator defined con-

figurations. The creation and modification of configurations is achieved using the

[PROG] key in the FUNCTION/DATA keypad. Programmable key assignments are

stored in non-volatile memory; once programmed a key retains its configuration until

changed by the operator.

The keys described in Chap. 3-1 provide the configurations likely to be required for most applications. The programmable keys increase the options available to the operator by allowing new configurations to be created which can be accessed by a single key-press.

A configuration consists of: a display of the current values of a number of para- meters; up to four soft key assignments; and the operating mode. The action of the

[PROG] key is designed around these three components. Three Edit modes allow you to

define a configuration by specifying:

The parameters to be displayed and their positions.

PROG key

and programmable

keys

The soft key assignments. The operating mode.

46881-852A

Aug. 89

3-33

Page 50

PROGRAMMABLE KEYS

The [PROG] key programmer in some ways resembles a word processor. A word

processor user:

(i) Either LOADS a document from a file into memory for editing or CLEARS

the memory ready to start from scratch. .~ (ii) Performs various EDITING operations on the document. (iii) STORES the resulting document to a file.

The [PROG] key similarly allows the sweeper user to:

(i)

LOAD an existing configuration into the 'edit memory'. This can be either one of the standard configurations (described in Chap. 3-1) or a previously created programmable key configuration. Alternatively, the edit memory can be CLEARed so that an entirely new configuration may be defined.

(ii) EDIT the configuration. (iii) STORE the new configuration to one of the programmable keys.

The [PROG] key accesses the main 'menu': LOAD, EDIT and STORE. Selection

of anyone of these gives rise to another menu of functions, and so on up to a maximum of three 'levels' below the main menu. The complete structure of the user programming

facility is shown in Fig. 3-7.

3-34

46881-852A

Aug. 89

Page 51

»b.

cO>

<00:>

. 0:> 0:>1

too:>

I\)

---

MAIN MENU

lt$[J::

10.[\'

PR~t£P. - !1wIH tENU

'-l

LEVEL 1

'""I

!:l

;s ;s

(1:)

'""I Q

-e

(1:)

""-

~ ~

C')

..•.

I'::

I W 01

LEVEL

LOAD MENU

Fl····~-~'·""n"R"...~

PICc&,J,· ..

[FL-f':" ]

··_··1

S£U:CT ~T

1=2-.",_._ ..•.

_w--i

DISPLAY CURRENT EDIT MEMORY

1.,.•. __- __ .~ .,...•...__ .._

I" .

fol(.:IGIo!)-'· ... ;

MODE EDITOR

LOAD tLEfO! EXlT

TO LOAD

OP"EAATJ (.H P10DE

[eu

SELECT

F":EQ-Fl.~T

TO MAIN

T1'f:'",

TO MAIN

TO EDIT

EXIT

EDIT MENU

SOFT KEY EDITOR

K£Y2 - KM-------KE.\'4

r,:(\'1

)(r~

[Fl

F'r;£(,

SCoF'Tl(£,:' SELECT [\.ERR

HPI{dE:t',>

J(1..'t'rnit'" ]

E')(

TO EDIT

STORE MENU

TIME' •..

~·ELE(T'

DISPLAY EDITOR-SELECT PARAMETER

F 1· ...__.~., "~'~"-'-. F'l(de.-,,,"·-··'~·

[FI FF:'£Q

r::..·-

~:$($:

DISPLAY EDITOR-POSITION PARAMETER

LEVEL

II••..·· ·, ".

P'I

(dE:t"I)·

[FI 1

~S["' S£L£CT "EXT c.t:LET£ £Y.1l

~"R'_

~.•,-.-.-,..-....' lInE·

E:>:J'

TO MAIN

1lt'1(····

fo'ElElE EXI T

TO EDIT

flAENU

"'D

G">

5 5

t:D

Page 52

MENU DESCRIPTIONS

MAIN MENU

PROGRAMMABLE KEYS

USER KElr' PROGRRt1HE~~ -

sor

RF is switched off when the programmer is selected. While editing is in progress, the configuration being created or modified is held in

the 'edit memory'. Since the edit memory is not cleared every time the [PROG] key is pressed, it is permissible to leave the programmer at any time and resume the editing session later. The edit memory contents are not preserved, however, when power is removed. To save a configuration permanently it must be assigned to one of the programmable keys.

Soft key assignments

LOAD

EDIT

Selects the LOAD menu (level l)which allows a "built-in" sweep or auxiliary) configuration, or a previously defined programmable key configuration, to be loaded into the edit memory for editing. DISPLAY CURRENT EDIT MEMORY (level 2) allows the edit memory to be cleared so that a new configuration may be created

"from scratch". Selects the EDIT menu for editing of the configuration currently held

in the edit memory. The editor allows displayed parameters, soft key assignments and the operating mode associated with the configuration to be modified.

~1HlHt'1E11U

STORE

•

3-36

STORE

EXIT

Selects the STORE menu which allows the current edit memory

contents to be stored to one of the programmable keys.

Leaves the programmer and returns to previous configuration.

46881-852A

Aug. 89

Page 53

PROGRAMMABLE KEYS

LOAD MENU and DISPLAY CURRENT EDIT MEMORY MENU

Fl·······························~F2 ······· ·..······..· ~ TINE ..··..·..· ~

P 1 (

dB!'1 ) ~

[FI-F2 ]

SELECT CllR~:ENT EXIT

LOAD (level 1) allows a standard configuration or a previously defined pro- grammable key configuration to be copied into the edit memory. DISPlAY

CURRENT EDIT MEMORY (level 2) allows the edit memory to be cleared so that

a new configuration can be entered "from scratch". Soft key and rotary control assignments

ROTARY CONTROL The configurations available to be loaded (listed in Table

3-1 overleaf) are displayed one after the otherusing the rotary control. The configuration label is displayed in parenthesis in row 3 and the associated parameters are shown in rows 1 and 2.

SELECT The displayed configuration is loaded into the edit memory.

This is indicated by SELECTED being displayed at the

left-hand side of row 4. EXIT CURRENT

Returns to main menu.

Displays the current contents of the edit memory and the

DISPLAY CURRENT EDIT MEMORY menu:

[~~B~;:=··:·=~L=_'~=e=.F=.L=····=C=~E=H=f=_=···=····=·"::'~==T=I=t'l=E="=E"I~]

LOAD

CLEAR

Returns to LOAD menu.

Clears the edit memory to allow the creation of a new

configuration, rather than the modification of an existing

config ura tion.

EXIT

46881-852A

Aug.

Returns to main menu.

3-37

Page 54

PROGRAMMABLE KEYS

TABLE 3-1 CONFIGURATION LABELS USED IN LOAD MENU

Label

FI-F2 CF-b.F

FIF2 CFb.F SLP

PWR SWP STATUS 1

STATUS 2

DELTA

SWP-TRG MK-SWP MK-SEL PRIVATE ALT DATE PROGl PROG2 PROG3 PROG4

PROGS

PROG6

SIP

Configuration

Swept operation (Levelled output power) (Fl-F2) Swept operation (Levelled output power) (CF-~F)

CW operation

Swept operation (Power Slope) (FI-F2) Swept operation (Power slope) (CF-LlF) Power sweep Status 1 display Status 2 display Parameter step size selection Sweep/Trigger selection Marker sweep Marker select Private GPIB status Alternate sweep selection Clock/calendar selection PROG1configuration PROG 2 configuration PROG 3 configuration PROG4configuration PROG S configuration PROG6configuration

l.:,

O.o\.-.

3-38

46881-852A

Aug, 89

Page 55

PROGRAMMABLE KEYS

LOAD MENU and DISPLAY CURRENT EDIT MEMORY MENU

Fl· ..····························:F2·· ·· ·~ Tlr·1E · ·~ P 1

(dE:f'1) ,

[Fl-F2 ]

SELECT CUR~:ENT EXIT

LOAD (level 1) allows a standard configuration or a previously defined pro-

grammable key configuration to be copied into the edit memory. DISPLAY CURRENT ED1T :tv1EMORY(level 2) allows the edit memory to be cleared so that

a new configuration can be entered "from scratch".

Soft key and rotary control assignments ROTARY CONTROL The configurations available to be loaded (listed in Table

3-1 overleaf) are displayed one after the otherusing the rotary control. The configuration label is displayed in parenthesis in row 3 and the associated parameters are shown in rows 1 and 2.

SELECT The displayed configuration is loaded into the edit memory.

This is indicated by SELECTED being displayed at the left-hand side of row 4.

EXIT Returns to main menu.

CURRENT Displays the current contents of the edit memory and the

DISPLAY CURRENT EDIT :tv1EMORY menu:

LOAD

CLEAR

Returns to LOAD menu. Clears the edit memory to allow the creation of a new

configuration, rather than the modification of an existing config ura tion.

EXIT

46881-852A

Aug.

Returns to main menu.

3-37

Page 56

PROGRAMMABLE KEYS

TABLE 3-1 CONFIGURATION LABELS USED IN LOAD MENU

Label

FI-F2

CF-~F

FIF2

CF~F PWR SWP

STATUS 1

STATUS 2

DELTA

SWP-TRG MK-SWP MK-SEL PRIVATE ALT DATE PROG1 PROG2 PROG3 PROG4 PROGS

PROG6

SLP

Configuration

Swept operation (Levelled output power)

Swept operation (Levelled output power) (CF-~F)

CW operation

Swept operation (Power slope) Swept operation (Power slope)

Power sweep Status 1 display Status 2 display

Parameter step size selection

Sweep/Trigger selection Marker sweep Marker select Private GPIB status

Alternate sweep selection

Clock/calendar selection PROG1configuration

PROG 2 configuration

PROG 3 configuration PROG4configuration

PROG 5 configuration

PROG6configuration

(FI-F2)

(CF-LlF)

(FI-F2)

)

3-38

46881-852A

Aug. 89

Page 57

EDIT MENU

PROGRAMMABLE KEYS

EDITOP

SOFTKEV

EDIT allows the operating mode, soft key assignment and dislay arrangement of the

the new configuration to be defined - via the appropriate level 2 "editors".

Soft key assignments MODE Selects MODE editor which allows the operating mode to be defined.

SOFTKEY Selects SOFTKEY editor which assigns parameters to the four soft

keys.

DISPLAY Selects DISPLAY editor which allows parameters to be selected for

display and their positions on the LCD to be defined.

EXIT Returns to main menu.

DISPLAy:J

46881-852A Aug. 89

3-39

Page 58

MODE EDITOR

---------------------J

----- DF'EF.:RTlO~~-

[Ct,1 ]

[

___ _ -.-.J

Row 2 of the display shows the current operating mode stored in the EDIT memory, which may be one of the following:

1"10(:'[ :

SELECT EXIT -

FF-:Eb!-FUn

PROGRAMMABLE KEYS

CW FREQ-FLAT FREQ-SLP PWR-SWEEP NO-CHANGE

The modes are displayed one after the other in row 3 of the display, by turning the rotary control. This allows the operating mode of the new configuration to be selected. The NO-CHANGE option allows a configuration to be created which will not change the operating mode when selected. This is useful for status displays, and is in fact used in the built-in configurations STATUS

Rotary control and soft key assignments

ROTARY CONTROL Used to view the four available modes and the 'NO

SELECT Selects the mode displayed in TOW 3. When selected this

EXIT Returns to the EDIT menu.

(constant frequency and power) (frequency sweep, levelled power) (frequency sweep with power slope) (constant frequency with power sweep)

and SWP/TRG

CHANGE' option. The mode is displayed in parenthesis in row 3.

overwrites the current mode displayed in row 2.

(

)

•

[

••

3-40

46881-852A

Aug. 89

Page 59

PROGRAMMABLE KEYS

SOFTKEY EDITOR

I<EV:.::

] [F2

]

50FTI<EV

I<EV3 KE\,4:]

][Pl(dE~)

SELECT CLERR EXIT

][ver~ier ]

KEVl

[Ft

[Fl

FI'~E(I

I I

The soft key editor is used to assign parameters to the four soft keys.

Row 1 of the LCD shows labels representing each of the four soft keys. Parameters currently assigned to these keys are shown in row

Rotary control, step key and soft key assignments

STEP KEYS Select a group of broadly related parameters. A label

identifying the group is indicated above the step keys, on the left of row 4. The labels for the various groups are listed in TABLE parameters by group is given in Appendix A.

ROTARY CONTROL Selects a parameter from within the group. The parameter

label appears in parenthesis on the left of row 3.

SOFrKEY Selects one of the four soft keys. The corresponding label

KEY] to KEY4 flashes Repeated key presses select each of KEYl to KEY4 in turn.

SELECT Assigns the parameter displayed in row 3 to the currently

active soft key (indicated by the flashing label).

3-2.

A full listing of the sweeper's

indicate selection.

CLEAR Removes any assigned parameter from the currently active

soft key.

EXIT Returns to the EDIT menu.

TABLE 3-2 SWEEPER PARAMETER GROUPS

Label

FREQ

PWR dBm

PWRmW Tllvffi

INTEGER DlAGNOST non num

46881-852A

Aug. 89

Parameter group

Frequency Power (dBm) Power (mW)

Time Integers Diagnostic Non-numeric

3-41

Page 60

DISPLAY EDITOR - SELECT PARAMETER

PROGRAMMABLE KEYS

rFT== :

P 1 .:dB".;, :

•[F1 ]

~ ~~~_. __._.~~~~~_E~~

The display editor facilitates positioning of parameters on the LCD .

F2···········::..················~ T I

t·1E:··············;

••••••••••

••••••••••••••••••••••••••••••••••••••••

The blank area in the example display is the LCD area available for parameter display.

Row 4 is reserved for status and soft key labels, and part of row 3 is required for the numeric entry field.

The LCD shows the total length of the character field occupied by each displayed parameter.

Rotary control, step key and soft key assignments

STEP KEYS Selects a group of broadly related parameters. A label

identifying the group is indicated above the step keys.

ROTARY CONTROL Selects a parameter from within the group. The parameter

label appears in parenthesis on the left of row 3.

CURSOR Accesses a level 3 menu which allows parameters to be

positioned (see next page).

DELETE

EXIT

If it is already present, the selected parameter is removed from the display.

Returns to the EDIT menu.

•

3-42

46881-B52A

Aug. 89

Page 61

PROGRAMMABLE KEYS

DISPLAY EDITOR - POSITION PARAMETER

In this menu the action of the step keys and rotary control is changed to allow

positioning of a cursor which in turn defines the position of the parameters on the display. This is indicated by the label CURSOR above the step keys. The cursor appears as an underscore character.

ROTARY CONTROL Clockwise - moves cursor to right.

Anticlockwise - moves cursor to left.

~I ~I

STEP KEYS Move cursor up/down.

SELECT

DELETE

EXIT

Places the chosen parameter at the position specified by the cursor. If the parameter is already present elsewhere on the display it is automatically repositioned. If the position is already occupied, or there is insufficient space, or if adding another parameter would cause the number displayed to exceed eleven (the maximum per configuration), an error message is displayed. Existing parameters cannot be 'overwritten', but must be deleted (see DELETE).

Returns to Display editor to allow the next parameter to be selected.

If already present, the selected parameter is removed from the display.

Returns to EDIT menu.

46881-852A

Aug. 89·

3-43

Page 62

PROGRAMMABLE KEYS

STORE MENU

~~~~~E::mm' -Tlt,tEm~~I~J1

STORE enables the configuration held in the edit memory to be assigned to one of the programmable keys (PROG 1 to PROG 6).

Rotary control and soft key assignments

ROTARY CONTROL Used to select a programmable key. The currently selected

programmable key is displayed in parenthesis.

SELECT Programs the selected programmable key with the con-

figuration held in the edit memory.

EXIT Returns to the programmer main menu.

3-44

46881-852A

Aug. 89

Page 63

PROGRAMMABLE KEYS

PROGRAMMABLE KEY WORKED EXAMPLES

The following worked examples demonstrate most of the editing facilities. A good

way to gain familiarity is to follow the examples on the sweeper.

Example 1

Suppose you wish to place the sweeper in CW mode but display and enter the power level in mW rather than dBm. In this example PROG 3 is programmed with a modified version of the standard CW configuration.

(1) Enter the programmer main menu by selecting ~

USH:

KEV PF:OGI':HI'lt'lER -

LOHC'

Note ...

. As a safety precaution, RF power is switched off when the

selected.

(2) As it is intended to modify an existing configuration, select the LOAD option. The

LOAD menu is displayed:

Fl········ ·..··..··: F2························..·····:

P 1

(dE:r·l) :

(FI-F:: ]

SELECT CURI'ENT E;,:IT

EDIT

S~T ~

~lmIi

STOF.:E

TINE ..·..··..·..··..:

r'lENU

EXIT

key is

(3) Rotate the rotary control to review each of the standard and programmable key

configurations. The label in parenthesis on the left of row 3 indicates which

configuration is being displayed, and the LCD shows the displayed parameters for

that configuration.

(4) Rotate the rotary control until the CW configuration is displayed, then press SELECT

to load the configuration ready for editing.

46881-852A Aug. 89

3-45

Page 64

PROGRAMMABLE KEYS

(5) Press

(6)

(7)

EXIT

Press

The MODE editor allows you to change the mode associated with the configuration. Since the intention is to continue with CW mode, it is not necessary to use the MODE editor on this occasion.

Select the

to return to the MAIN menu.

~~: KEV PROGRRI'lt'lEI':

~ LORD H)lT

EDIT

to obtain the EDIT menu.

SOFTKEY

Ff;:E(!

[Fl

editor.

K£l?l

HF2

]

SOFTKEY

E["1 TOF.:

MODE SOFT

KE •.•.•2

][Pl(d8M)

SELECT CLERR EXIT

- ~1RIH

STORE

KEY

DISPLRY EXIT

KEY3

)[vernier

t'lE~~U

E:X:IT

KEV4

The SOFTKEY editor allows you to assign parameters to the soft keys. On entering the SOFTKEY editor, the active soft key. Successive presses of

Press

(8)

The rotary control and step keys are used to select the parameter to be assigned to the soft key, The step keys select groups of broadly related parameters and the rotary control selects individual parameters within the group. Parameter groups are displayed on the left of row 4, and individual parameters are displayed (in paren- thesis) on the left of row 3. .

(9) Press one of the step keys repeatedly until the PWR

selected.

(10) Rotate the rotary control (if necessary) until the required parameter

appears in the parenthesis.

(11) Press

SOFTKEY

SELECT

twice to select

to assign the parameter

KEYl

[eF

[P 1

([')llO

Pb.I~:Mltl

KEYl

label flashes to indicate that this is the currently

KEY3.

I<Ey'2

] [fi

tet~

]

SOFTKEY

SOFrKEY

Pl(mW)

select

KEY3.

KEY2

KEY:;; KEY4

](Pl(~W)

][vernier

SELECT CLE~R EXIT

KEY4

parameter group is

in turn.

Pl(mW)

[

(12) Confirm that the desired parameter is assigned by checking for

flashing

3-46

KEY3

symbol.

Pl(m'V)

beneath the

46881-852A

Aug. 89

Page 65

PROGRAMMABLE KEYS

(13) Soft key editing IS now complete.

r·10C·E ~.OFTKEIy' C'ISPL~N ~

(14) Select

DISPLAY

to enter the DISPLAY editor.

C7'" .

t.:F ,

F'l O::dB~·I)..· ··..:

i ]

FREQ CURSOR

EDI

Press

TOI':

EXIT

to return to the EDIT menu.

-l

fi1

t.Eot- .. · ··.. ,

\.-'er·n

Eot'.. · :

[:oELETE E~";I T

The displayed parameters are shown with bars indicating their field length. The task now is to delete the

Pl(dBm)

parameter and replace it by

Pl(mW).

(15) As with the soft key editor, the step keys are used to select a group of parameters

and the rotary control is used to select a parameter within that group. Select the

PWR dBm

group and the PI

CF··....·....··....·..··..·....··~

(dBm)

parameter, then press

DELETE.

[PI

(dB!"I) ]

P\i.IR

dBr'.

The

Pl(dBm)

parameter has been deleted from the display.

(16) Use the step keys and rotary control to select the

parameter. Press

CURSOR.

CURSOR

PWR mW

group and the

Pl(mW)

(17) The cursor appears as an underscore character on the LCD. Using the step keys to

move the cursor up and down, and the rotary control, to move it right (clockwise rotation) and left (anti-clockwise rotation), position the cursor in the parameter display area. The cursor may be positioned anywhere on the upper three rows of the LCD except the ten character field on the left of row 3, which is reserved for numeric entry.

(18) Move the cursor to the position where the

displayed, (the beginning of row 2) then press

P1(dBm)

SELECT.

parameter was formerly

~1~~~;··;;~~ECT

NE:X:T

Modifications to the configuration are now complete.

46881-852A

Aug. 89

l..'e-r·n

DELETE

t.E'r·

er..·

EXIT

3-47

Page 66

PROGRAMMABLE KEYS

(19) Press EXIT to return to the editor menu. Again press EXIT to return to the main

menu.

KEY PROGRRMMER - M~IN

LORD EDIT STORE

(20) Press STORE.

(21) The display shows the display configuration ready to be stored. The rotary control

is used to select one of the programmable keys. Rotate the rotary control until PROG 3 appears in the parenthesis.

(22) Press SELECT to program key PROG 3.

row 4.

SELECTED is displayed on the left of

t·1EI·1U

EXI!J

(23) Press EXIT to return to the main menu, and again to exit from the programmable

key programmer and return to the previous configuration.

PROG 6

(24) Press

As required, it is now possible to enter power levels in mW instead of dBm. If it had been required that the user had the option of entering the power level either in

dBm or in mW, this could easily have been achieved by deleting one of the other parameters in the CW configuration (CF, filter or vernier) and substituting Pl (mW).

Example 2

The power slope configurations, Power Slope (Fl-F2) and Power Slope (CF-AF), do not allow the start power level (Pl ) to be defined. Instead this parameter must be set up using one of the levelled sweep configurations. If the start power needs to be varied, it may be found inconvenient to keep having to reselect the levelled sweep configuration,

If there is no requirement to vary the sweep time, therefore, it would be sensible to

modify the power slope configuration(s) so that the

PROG

to try the new configuration.

CF i3.2550GHz

Pi 0. 00dBI"1

i1t.er- on

I..!En1iet-·off

P 1

~)ErTI

parameter replaces

er-

TIME.

[

The example below shows how such a configuration may be programmed and stored to PROG1. The example uses the Power Slope (Fl-F2) configuration as basis, but the same method would apply for modification of Power Slope (CF-AF).

46881-852A

3-48

Aug. 89

Page 67

PROGRAMMABLE KEYS

(1) Enter the programmer MAIN menu and press LOAD. The LOAD menu is dis-

played.

(2) Rotate the rotary control until the FIF2 SLP configuration is displayed. Press

SELECT. SELECTED is displayed on the left of row 4. (3) Press EXIT to return to the MAlN menu. (4) Press EDIT. The EDIT menu is displayed. (5) As there is no need to change the mode of the configuration, the MODE EDITOR

does not need to be used. Press SOFTKEY. The SOFrKEY EDITOR menu is

displayed. (6) Press SOFfKEY three times to select KEY4. (7) Use the step keys to display the PWR dBm parameter group on the left of row 3.

Pl(dBm) should be displayed on the left of row 3. (8) Press SELECT to assign the parameter Pl(dBm) to KEY4. Pl(dBm) will be

displayed below KEY4 on the display. (9) Soft key editing is now complete. Press EXIT to return to the EDIT menu. (10) Since Pl(dBm) is already displayed in the Power Slope (F1-F2) configuration,

there is no need to use the DISPLAY editor. Press EXIT again to return to the

MAIN menu. (11) Press STORE to display the STORE menu. If necessary, rotate the rotary control to

display PROGI on the left of row 3. Press SELECT to program PROGl with the

new configuration. Press EXIT to return to the MAIN menu, and then again to exit from the programmable key editor and return to the previous configuration.

PROG4

(12) Press

Example 3

In this example a new configuration is created 'from scratch' in which Fl and F2 and markers A and B are displayed and can be controlled. The configuration is stored

to PROG5.

Press to display the programmer MAIN menu.

(1)

PROG I

to try the new configuration.

SHIFT -

ffio

Press LOAD to display the LOAD menu.

(2)

Press CURRENT to display the current contents of the EDIT memory.

(3)

Press CLEAR to clear the the contents of the EDIT memory.

(4)

Press EXIT to return to the MAIN menu.

(5)

Press EDIT to display the EDIT menu.

(6)

46881-852A

Aug. 89

3-49

Page 68

PROGRAMMABLE KEYS

(7) Press MODE to display the MODE EDITOR menu. (8) Rotate the rotary contol until the FREQ-FLAT mode is displayed in row 2. Press

SELECT to select this mode, then EXIT to return to the EDIT menu.

(9) Press SOFTKEY to display the SOFfKEY EDITOR menu.

(10) Use the step keys to select the FREQ parameters. Fl should now be displayed on

the left of row 3. Press SELECT to assign Fl to KEYl (which will be flashing).

(11) Rotate the rotary control to display F2. Press SOFTKEY once to select KEY2.

Press SELECT to assign F2 to KEY2. Repeat procedure to assign A to KEY3 and B to KEY4. Press EXIT to return to the EDIT menu.

(12) Press DISPLAY to give the DISPLAY EDITOR - SELECT PARAMETER menu.

The FREQ parameters should be displayed on the left of row 4, and Fl on the left of row 3.

(13) Press CURSOR to display the DISPLAY EDITOR - POSITION PARAIvIETER

menu. Use the step keys and rotary control to position the cursor in a suitable position and press SELECT. The Fl parameter is displayed in the position defined

by the cursor, with bars indicating the field length.

(14) Press NEXT to return to the SELECT PARAMETER menu. Use the rotary control

to select F2. ••.

(15) Press CURSOR to return to the POSmON PARAMETER menu. Use the step keys

and rotary control to position the cursor suitably and press SELECT. F2 is

displayed in the position defined by the cursor. . (16) Repeat (14) and (15) to position A and B as required. (17) Press EXIT to return to the EDIT menu, and again to return to the MAIN menu. (18) Press STORE to give the STORE menu. Rotate the rotary control to PROGS and

press SELECT. (19) Press EXIT to return to the MAIN menu, and then again to return to the previous

configuration.

PROG5

(20) Select

In addition to the above examples, useful applications of the user programming facility include the ability to remove all frequency information from the display (by deleting the appropriate parameters using the display editor), and the overlaying of the INIEGER clock parameters H (hours), M (minutes) and S (seconds) to allow the timing of a test procedure.

SHIFT PROG 2

I I

to check the new configuration.

A complete list of the sweeper's parameters is given in Appendix A. It may be useful to consult this in designing a configuration for storing to the programmable keys.

46881-852A

3-50

Aug. 89

{

\.:

Page 69

Chapter

3-3

PRIVATE GPIB OPERAliON

INTRODUCTION

The private GPIB enables the sweeper to control a Marconi Instruments RF Power Meter type 6960 or 6960A and a Marconi Instruments 26.5 GHz Microwave Counter type 2442 during autocalibration.

It also provides an interface to an Automatic Amplitude Analyzer type 6500 and,

optionally, an HP-GL (Hewlett Packard Graphics Language) compatible plotter, to form a scalar measurement system.

CAUTION

There are two GrID interface connectors located on the rear panel of the sweeper.

The SYSTEM GPIB interface is intended for remote programming of the sweeper.

Under no circumstances should a GPID controller be connected to the interface connector marked PRIVATE, or damage to the sweeper and GPIB controller might result.

ADDRESS ALLOCATIONS

I I

Private GPIB addresses are allocated as folIows:

6500 Automatic Amplitude Analyzer 8 Plotter 5 Power meter 9

.Frequency counter 6

PRIVATE GPIB INITIALIZATION

At power-on, in response to an init command from the keyboard or system GPID, or after pressing CAL softkey during calibration, the sweeper checks the private GPIB addresses listed above to determine which instruments are installed. It is necessary to reinitialize the private GPID should a device be added or removed. For this reason, it is recommended that all instruments intended to be used on the private GPID should be connected and switched on before the sweeper.

46881-852A Aug. 89

3-51

Page 70

PRIVATE GPIB OPERATION

A status display showing the private GPIB configuration

~ PAIVATE

anal':l::.r·[BJ count.er-

init

analysr[8] 6500 Automatic Amplitude Analyzer expected at address 8 counter[6] Counter expected at address 6

pwr_mtr[9] Power meter expected at address 9

c.ff

[b)

init.

Initialize private GPIB

device[X) indicates the expected address of a device connected to the Private GPIB, thus:

F'WI'_I"It.r[9Joff F'lot.t.ed5J off

obtained using:

(

[

plotter[S]

on off

At power on or following a private GPID reset command, the sweeper determines which devices are present on the private GPIB and sets analysr[8], counter[6], pwr_mtr[9] and plotter[5] on or off accordingly.

Power meter and counter operation

The power meter and counter are used for automatic calibration. Refer to Chap.

3-5.

Pass through facilities

A GPID controller connected to the system GPIB may communicate with a

device installed on the private GPIB. Refer to the GPID Operating Manual.

Plotter expected at address

Device present at expected address Device not present at expected address

[

{

3-52

46881-852A

Aug. 89

Page 71

Chapter 3-4

\lALYZER

~PERATION WITH 6500 AUTOMATIC AMPLITUDE

ANALYZER

~R NETWORK ANALYZER SYSTEM

hen used in conjunction with a 6300 series sweeper to form a scalar network

system, many enhancements are made to the operation of the 6500 Automatic

ude Analyzer. The main additional facilities are as follows:

gh resolution x-axis display. Units may be either GHz or dBm depending on the

weeper mode (dBm for power sweeps). Annotation is automaticalJy updated when- ner the sweeper's frequency range or operating mode is changed.

a calibration trace is stored and, subsequently, a measurement over a narrower

'equency band is made, the sweeper expands and interpolates the data stored in

00 to maintain a calibrated display.

a digital plotter is installed, the sweeper controls plotting of 6500 measure-

.nts. A title may be entered via the 6500 keyboard and added to the plot. This

it title is held in non-volatile memory. Plotting is implemented as a 'background

sk', allowing 6500 to make new measurements while plotting is in progress.

front panel settings are stored automatically to the selected sweeper memory nenever a sweeper memory store operation is carried out. This allows non-volatile orage of up to 20 sets of 6500 settings. These may be recalled by sweeper

.mory recall operations or by means of the special alternate sweep facilities

.veloped for use with the 6500.

ection in

graticule mpatible

eration as at

the

JS 1

.d to the ex-axis power in

Numeric

possible

~ power is switched off automatically during 6500 detector zero operation. me marker and delta marker facilities are provided on the display and on the

otted output, if 6500 firmware is Issue 6 or higher.

atibility

correct operation, 6500 must have installed firmware Issue 5 or higher. 6500

r-eissue status may be determined at power-on. Refer to 6500 Operating Manual.

is dis-

gram the

Page 72

OPERATION WITH 6500 AUTOMATIC AMPLITUDE ANALYZER~I

The following marker facilities apply to analyzers equipped with Issue 6 or higher

software:

Provision has been made for the electronically generated line markers available on

6500 to be assigned to and track the sweeper's markers.

Line markers are vertical lines similar in appearance to the brightline cursor. Issue

6 firmware provides a small highlight "pip" on the lower end of the brightline to distinguish it from the line markers.

Control of the line markers is achieved by means of a menu displayed on the 6500 screen. They may be displayed instead of or as well as the RF dip markers

generated by the sweeper.

Marker control from the 6500 marker menu

Full control of the 6500 line marker facilities is obtained by selecting [SlllFT]

[MARKER].

The following information is displayed:

6300 Markers:

6500 Markers: Off orr

Toggle using:

6 - All orr

7 - All On

8 -

Marker

9 - Marker

NORMAL - Exit

The upper two lines show which of the sweeper markers, A to E, have been assigned 6500

line markers.

Numeric keys ] to 5 may be used to assign a line marker to a sweeper marker. These

keys have a toggling action; the current assignments are shown as Off or On.

Numeric keys 6 and 7 may be used to switch all five line markers on or off together.

!:l. !:l.

A B

On/Off

with

!:l.F

On/Off

orr

3 4

Off orr

'-.oj

Option 8 toggles the Marker between the measurement at the reference marker frequency and at the 6500 brightline frequency. Marker A information is updated at the same time as the other brightline related information - at the end of each measurement sweep and when the brightline is moved.

Option 9 performs the same function as option 8, but additionally displays the absolute value of the frequency difference between the reference -rnarker and the brightline, in place of the usual brightline frequency. This is indicated by a part of the 6500's frequency axis annotation.

The Marker A display is switched on only when the sweeper is in a swept frequency mode (not CW or power sweep), and when the Reference Marker is displayed as a line marker.

3-56

!:l.

display on or off. This shows the difference in amplitude

!:l.

character displayed as

46881-852A

Aug. 89

Page 73

OPERATION WITH 6500 AUTOMATIC AMPLITUDE ANALYZER

The Marker /). field is blanked if it is not possible to compute a valid amplitude

difference value. The most likely reason for this is that the reference marker frequency lies outside the current Fl-F2 frequency range.

Assigning the reference marker frequency using the 6500 brlghtline

The 6500's [MARKER] key sets the sweeper reference marker frequency from the 6500's current brightline frequency. This may be used to position a marker at a feature of interest on the new trace. At the same time as the reference marker is assigned the new frequency, the corresponding 6500 line marker is switched on. (This action is performed automatically, so that it is not necessary to select the marker menu - see above).

Brightline Skip

The [~F] key on the 6500 has been re-assigned to provide a brightline skip facility. When [~F] is pressed, the brightline skips to the first line marker it encounters at

a frequency higher than its present position. If the brightline reaches the end of the sweep (F2) without finding a line marker, the search is resumed starting at the beginning

of the sweep, (Fl ). A message is displayed at the lower right of the 6500 graticule area

to identify the destination marker. For example,

means that the brightline has skipped to marker B.

Instrument settings stores

The [STO] and [RCL] keys on 6500 are disabled when the instrument is used with the

sweeper. Instead, 6500 settings are stored in the sweeper at the same time that sweeper

STORE and RECALL operations take place. This provides two advantages. The number of stores available for holding 6500

instrument settings increases from 9 to 20, and the storage is non-volatile.

STORE and RECALL operations are transparent as far as the 6500 operator is con- cerned. When a STORE operation is initiated in the sweeper, a "snapshot" of the current settings of the 6500 is transferredvia the private GPIB and stored together with the sweeper settings. The .6500 settings are transmitted back to the 6500 and are activated when the sweeper memory is recalled.

If the sweeper power-on condition is specified to be one of the memories (see under MEMORY FACILITIES, Chapter 3-1) the 6500 settings in that memory will also be

recalled following power-on.

Note .••

When the 6500 is displaying a menu or other sweeper generated prompt, it is not possible for technical reasons to carry out a store or recall operation. The store or recall operation is held "pending" until you exit from the menu displayed on the 6500 screen. In most cses this is done by pressing the 6500's [NORMAL] key. As a reminder that there is a store or recall operation pending, a message is displayed on the top line of the 6500 display:

46881-852A

Aug. 89

STO/RCL Pending - Select Exit

3-57

Page 74

OPERATION WITH 6500 AUTOMATIC AMPLITUDE ANALYZER

Alternate sweep with the 6500

The alternate sweep facility provides a means of switching between two com- plete analyzer and sweeper instrument settings with one key press. Refer to "Alternate sweep selection" in Chapter

When the altern parameter is toggled from off to man a "snapshot" of the 6500 settings is taken - these are the current settings.

3-1.

The ALT_MEM parameter specifies which of the twenty

memories will be used for alternate sweep.

The man_alt parameter toggles between the

in the specified memory.

Notes ...

The analyzer current settings are updated only when the altern parameter undergoes

a transition from off to man. You must remember to switch altern to off and then to man again if you change any parameter (such

6500. If you do not do this, the new 6500 settings will be overwritten by the "old" current settings the next time man_alt toggles from memory to current.

It is not possible to engage auto alternate sweep with a 6500. The altern para- meter will not toggle to auto when an analyzer is present on the private bus.

6313/6500

DATUM, RANGE etc.) on the

current settings and those

6313/6500

settings

Alternate sweep worked example

Here isasimple example to demonstrate the alternate sweep operation.

(1) Select the ALT configuration on the sweeper and ensure that the altern parameter is

set to off and the man_alt parameter is set to current.

(2) Select channel A on the 6500 and set a DATUM level of 3.0 dBm. Store settings to

Memory 3 using the sweeper's memory facility.

[

(3) Set a new datum of 10 dBm on the 6500. In this way we have madeachange to

distinguish the analyzer operation from that stored in Memory 3.

(4) Select the ALT configuration on the sweeper and set the ALT_MEM parameter to 3.

This means that the system will alternate between the current settings and those in Memory 3.

Toggle the altern parameter from off to man. This causes the the 6500 current

settings to be acquired. Now use the man_aU key to alternate between the current settings and those in

Memory 3. Although, in this simple example, the only difference between the current and

memory settings is the 6500 DATUM value, the principle of operation is demon- strated.

46881-852A

3-58

Aug. 89

i '

Page 75

OPERATION WITH 6500 AUTOMATIC AMPLITUDE ANALYZER

ZERO

During 6500 detector zero RF power is switched off automatically.

STORE and SUB MEM keys

Whenever a trace is stored to one of the analyzer memories, a copy is transferred to the sweeper. If a SUB MEM operation is initiated on 6500, the sweeper transfers the appropriate memory data back to 6500 after performing any necessary interpolation

swept frequency range has changed. Warning messages are displayed on the sweeper LCD if sweeper operating mode has changed or the current sweep range encompasses fre- quencies for which no data was stored.

it is

not possible to interpolate the stored calibration data because either the

the

Changing 6500 sweep speed

A change to the 6500 sweep time causes the sweeper TllvlE parameter to be up- updated. Despite the fact that the sweeper operates in external sweep mode with 6500, the TIME parameter value is set to the 6500 nominal sweep speed to ensure that speed dependent error correction performed by the sweeper is properly applied.

PLOT key

If a digital plotter is not connected, the 6500 displays the conventional analog X- Y

recorder menu (see 6500 Operating Manual). If, however, a digital plotter (address 5) is connected to the private

Menu. For example:

Filter AB123 Plotter Menu

o -

Plot All

Plot Graticule 2 - Label Graticule 3 - Plot Trace Only

4 -

Edit Title

5 -

Abort Plot 6 - Enable/disable DATE NORMAL - Exit If menu items 0 to 3 are selected, the sweeper acquires the plotter command strings

from 6500 and commences transmitting short HP-GL 'packets' to the plotter. Providing the plotter does not hold up the GPffi handshaking excessively, other bus commands may be interleaved between the HP-OL packets, allowing you to exit from the plot menu

using the

NORMAL

GPIB,

27/5/89

key and make further measurements.

any previous plot title is displayed, followed by the Plotter

Menu option 5 causes any plot operation in progress to be aborted.

46881-852A

Aug. 89

3-59

Page 76

Plot title editor

OPERATION WITH 6500 AUTOMATIC AMPLITUDE ANALYZER

A title of up to 33 characters may be added to a plot. Following selection of menu option 4, the 6500 keyboard is redefined. A pictorial representation of the new 6500 key assignments is displayed on the 6500 screen, together with the current plot title and the edit cursor (-).

The top row of 6500 keys provide the basic edit functions: defining the character set which applies to the other 32 keys and providing cursor control. In the example below, character set] is in use and the previously displayed title has been partially overwritten with the new title.

Character Set 1 Character Set 2 Character Set 3 Cursor Left Cursor Right

II 11r----,

D81i lam m Ii

AB C DEFG H IJ K LMNO P QR S TUVW X

@ [\]~

Filter BC456

27/5/89

Space Exit

6500 Keyboard

Character Set 1

Editor function keys

r I

•

i .

{

(

Character Set 1

Character Set 2

Character Set 3

Cursor Left

Cursor Right

Space

Exit Returns to the plotter menu.

It should be noted that the characters plotted are a function of the plotter, not the

sweeper or amplitude analyzer, and may therefore differ Slightly from those displayed on the 6500 screen.

The plot title is held in non-volatile memory.

Selects upper case alphabetic characters. Selects lower case alphabetic characters. Selects numeric and symbol characters.

Moves cursor non-destructively one space left. Moves cursor non-destructively one space right.

Inserts space character at cursor position and moves cursor one space right.

Enabling/disabling DATE plotting

Menu option 6 gives rise to another menu as shown below:

DATE Plotting Enabled

o -

Disable DATE plotting

Enable DATE plotting

NORMAL - Exit

',.

)

The first line of text is a message showing the current status of DATE plotting. It will either be 'Enabled' or 'Disabled'. It will default to 'Enabled' when the instrument is switched on. The state can be toggled using the '0' or '1' options, and will remain as set until the instrument is switched off.

46881-852A

3-60

Aug. 89

Page 77

OPERATIONWITH 6500 AUTOMATIC AMPLITUDE ANALYZER

Presentation of brightline and marker information on 6500 plots

Fig. 3-9 below illustrates the presentation of brightline and marker information on a

digital plot of channels A and B. The plot shown is half the actual size. Option 9

(Marker

marker and one other marker are switched on.

t:::..

with ~F) has been selected from the marker control menu, and the reference

dBm

• 3. 6

.• 3. 4

.• 3. 2

3. 0

• 2 . 8

.• 2 . 6

.• 2 . 4

.• 2 . 2

.• 2 . 0

.• 1 . 6

1 . 4

Power

A=+3·23dBm 1l::+0-90dB

B= .•

3·17

A= .0'79 dB

@]-;-I---i--ffi]

>-------'----i-----,----'---It-

,Ref. Mk= 6_6603

2_0000

dBm----f£)

Inl

--~--- -1- --.----,-----,...-----,

: i

-+----'-1-----

------·-----t+--T-V-Ti

QJI~-

12 _

lOOms

Marconi

0475

TPA 5867

~ =Power scaling [[] =Current measurement

[£] -Brigbtline power

[Q]

[ill

-Difference in power between brightline and reference marker

=Sweep time

[£] =Reference marker frequency @]

-Reference marker (identified by "R" at the bottom of the graticule)

lliI =Brightline (extends below graticuJe)

[I]

-Marker

-Difference in frequency between brightline and reference marker

lliJ

=Time and date - use [DATE] key. See "Clock/calendar selection" in

Chapter 3-1. May be disabled from Plotter menu.

Fig.

3"-9

6500 plot of channels A and B showing presentation of brightline and

46881-852A Aug. 89

marker information

3-61

Page 78

OPERATION WITH 6500 AUTOMATIC AMPLITUDE ANALYZEA

Blank page

(

••

3-62

46881-852A

Aug. 89

Page 79

Chapter 3-5

CALIBRATION

INTRODUCTION

I I

The sweeper may be calibrated by the user to match non-standard test conditions

(e.g. high ambient temperature) using Marconi Instruments' 2442 26.5 GHz Microwave Counter and 6960A or 6960 RF Power Meter with a 6913 (10 MHz to 26.5 GHz) Power Sensor. The calibration process is fully automatic and is controlled via the private GPIB.

CALIBRATION TYPES

There are two distinct types of calibration - standard and limited. For a standard

calibration the sweeper is calibrated for frequency and power over its full operating range. Standard calibration data 'is held in any of three independent stores: Primary, User 1 and User 2. The limited calibration facility allows you to perform a power calibration over a limited frequency range. This makes it possible to calibrate the sweeper at the output of frequency selective devices such as filters and amplifiers. Limited calibration data is held in either of two .independent stores: Limited 1 and Limited 2.

The Primary' calibration data, created during factory calibration, is stored in EEPROM (Electrically Erasable Programmable Read Only Memory), and the User and Limited calibrations, which may be created by the operator, are stored in NOVRAM

(NOn-Volatile Random Access Memory). The calibration currently in use is indicated by a symbol displayed in the status field.

II.

Primary calibration selected

User 1 calibration selected

-.. User 2 calibration selected

Limited 1 calibration selected

~ Limited 2 calibration selected

Appropriate calibration data is applied for each type of automatic level control. For

internal levelling, this is the power calibration data held in the selected calibration store. For external and power meter levelling, default data is applied which removes. the compensation for the internal detector.

A flashing symbol indicates that the selected calibration store contains default data.

Provision is made to transfer calibration data from either User 1 or User 2 to the Primary calibration store. Limited calibration data cannot be transferred into the Primary store.

46881-852A

Aug. 89

3-63

Page 80

CALIBRATION

USER AND LIMITED CALIBRATION

In User calibration, frequency and power data is gathered across the complete

system frequency range, as is done during Primary calibration.

For Limited calibration, the frequency calibration data from the currently selected store is retained, and the power calibration data is gathered over any defined frequency range greater than 500 MHz span.

(1) The power calibration process is quicker if performed over a narrower frequency

span.

(2) The power output over the restricted range is flatter than

or User calibration, since the data points are closer together for Limited calibration.

(3) There is no need to perform a frequency calibration immediately before the Limited

power calibration. Thus, assuming the frequency calibration is satisfactory, the user can calibrate the power level over a limited frequency range for a number of frequency selective devices- without having to perform frequency calibration on each occasion.

The calibration process is controlled through a sequence of menus. This is illus-

trated in the Calibration flowchart, Fig. 3-10.

would be after Primary

I·~ -.,

IL.

,..

3-64

i' .

46881-B52A

Aug. 89

Page 81

CALIBAATION ENTRY

authorisaiim code

MAIN CAL MENU,

r------------

I I

I I I I

I I

L _

FREQUENCY CALIBRA'TlON

F5:f",

H(.,'

I TJOtI

«"let rH~ l-.:tn.

CALIBRATION

r-------------

I POWER CAlIBRA TlON '------. I

I I

rROCU:O

power cat menu

rr=~==~~~.,r..~~~,~~,,~u~,====~=o

II.--------~~------~

(If'I..ref:'CI'tIW LlI'l1~

6. '5(l(I>o)IiH:

lFKP iI:.300()~

CL\.I..IllTIIL P'LH1I'IU·S:

-------,

P(",o' CRlltl"Afl I

______ ....J

[--.IM

i ~ ,---------------

I I

L ~

a Jt<or

25&

appro.

I I

r------------ -----------~

r I I I I

TRANSFER

I ""'"..

'--+-..•.

46881-852A

Aug. 89 3-65

ro-;A-;;Z;:vc;LIBRAnCiN-1

01'0: AUnutSQ1U)1

(010(

OIT

TO••• "". 10 .,,_.

USO! USH.: Dor

e...

Fig. 3-10 Calibration flow chart

I I

I I I

I l~'

L ~

"".m'''·''Ii'

J(.

~" I

UtllTtOl L1nlTElll

1 1

TPB 5945

Page 82

CALIBRATION

CALIBRATION INTEGRITY

There are three protection measures incorporated into the design to guard against

unauthorized interference with the sweeper's calibration.

(i) An internal switch may be set to disable the front panel calibration function.

To access the internal switch the sweeper's covers must be removed, and these

may be sealed. During manufacture, the switch is preset to permit front panel

calibration. Refer to the Service Manual for setting instructions.

(ii) The operator must enter a six digit authorization code before a new calibration

can be acquired or selected.

(iii) Transfer of data from either User 1 or User 2 calibration stores to the Primary

calibration store is protected by a second six digit authorization code.

On the following pages the method of gathering frequency and power calibration data for the User and Limited calibrations is detailed together with the method for transferring of User calibration data into the Primary calibration store. Each group of menus is con- sidered in turn. Refer to Fig. 3-10 to see how the various menus are related.

f "

3-66

46881-8S2A

Aug. 89

Page 83

MENU DESCRIPTIONS

CALIBRATION ENTRY

CALIBRATION

EtHER

The correct sequence of six digits must be entered before access to the calibration

main menu is permitted. The digits are not displayed as they are entered.

EXIT

__======---==================-.JE>::I T

CRL I E:~:HTI ON

RUTHOPI SRTIOH (:OI>E

Exits from the calibration facility.

•

46881-852A Aug. 89

3-67

Page 84

CALIBRATION

MAIN CAL MENU

When the authorization code has been entered correctly, the display is as shown

~~. r

ID 1E:tll 87

CURRENT CRL : PRIMl=If;:"r'

SELECT Cl=IL TRANSFER EXIT

OPERl=ITINGHOURS

ID Optional identification number. This may be used to

show the date of calibration.

OPERATING HOURS Operating hours since calibration data was stored.

CURRENT CAL

Identifies the calibration currently in use. If corruption of the calibration data is detected, the appropriate store will be overwritten with default data and this will be indicated by the label DEFAULT adjacent to the current calibration label.

Soft

key assignments

SELECT

Selects and applies calibration data from Primary, User 1, User 2, Limited 1 or Limited 2 calibration stores. During subsequent operation, the selected calibration is displayed in the status field.

I-

eAL

TRANSFER

Initiates acquisition of calibration data. Transfers calibration data from User 1 or User 2 to the

Primary calibration store. The Primary calibration is protected by a second authorization code.

EXIT

To initiate the acquisition of new calibration data, press

Exits from the calibration facility.

CAL.

The private GPIB is then initialized as though the init softkey had been pressed. There will therefore be a short delay before the CALmRATION SELECTION menu

presented. The duration of the delay depends upon the devices connected to the private GPIB. This is to ensure that any devices connected to the private GPm since the sweeper was powered up are initialized.

46881-852A

3-68

Aug. 89

(

,""

! \

I ;

Page 85

CALIBRATION SELECTION

CRL18RRTION ~ELECTluN

CALIBRATION

FREG!UENCV

R~m

POb.IER

FREQUENCY Selects calibration of both frequency and power.

AND POWER

PO"WER Selects calibration of power only.

When FREQUENCY AND POWER is selected, the FREQUENCY CALIBRATION

menu is presented first (see next section).

If POWER ONLY is selected the warning display appears as shown below,

indicating which calibration store will provide the frequency calibration data for the power

calibration:

POloJER

ot~LV R80RT

WRRNING :

FREQUENCY

THIS

DRTR

P~:OCEED

POWER CRL WILL USE

FROM

THE ~

STORE.

THE

RBOF.:T

I I

PROCEED

ABORT

If the incorrect devices or no devices at all are present on the OPIB then the

following error screen will be displayed:

I [

EF.:POf':

~~~===~~~~~Er~':IT~

EXIT Returns to the calibration main menu.

If this error occurs the private OPIB connections should be checked. If these are

satisfactory the addresses of the devices should be inspected to ensure they are those

expected by the sweeper. (See section on private OPIB status, Chap. 3-3.)

(:o[>E 42 REFEF.: TO

Calls up the POWER CALlBRA TION menu.

Returns to the CALIBRATION SELECTION menu.

C!=lLI

E:f':AT

(It-~

TEf':t'1I~~t=lTE[~

5EI<:t)

CE ~'l=It'1Ut=lL

46881-852A

Aug. 89

3-69

Page 86

FREQUENCY CALIBRATION

The sweeper presents the following frequency calibration menu.

CALIBRATION

;

FREQUEN(:\" CI=ILIBR~T

CONNECT COUNTER TO

PROCEE[) E>c:I

PROCEED Starts frequency calibration data acquisition.

EXIT

During calibration the display is as below. The progress of the calibration is indicated by the series of dashes which progressively fills row 3 of the display.

rr===== ~

~_ COLLECTING [)ATA

ABORT

Returns to the calibration main menu without acquiring any calibration data.

FREG!UENU •.' CI=ILIE:~:~TI

Aborts calibration and returns to the calibration main menu.

SII.IEEF'ER

ION

~~F OUTPUT

RE:ORT

3-70

46881-852A

Aug. 89

ll.,

I :

Page 87

CALIBRATION

POWER CALIBRATION - Power calibration menu

Following successful acquisition of the frequency calibration data, or if POWER ONI...Y and then PROCEED has been selected, the sweeper presents the POWER CALlBRAnON menu.

POWER CRLIBRRTION

POWER_MTR LIMITS PROCEED RBORT

POWER_MTR

LIMITS

PROCEED

Initiates calibration of power meter.

Allows entry of frequency limits for power calibration. Commences acquisition of power calibration data. Only to

be pressed after the SENSOR and PM_CAL routines are

completed.

ABORT

Aborts calibration and returns to the calibration main menu.

Detailed descriptions of the POWER_MTR,

LTh1ITS

and PROCEED options follow.

46881-852A

Aug. 89

3-71

Page 88

POWER l\1TR - Power meter calibration

CALIBRATION

POWER METER

SHISOR

SENSOR

Detailed descriptions of the SENSOR and PM_CAL options follows.

Allows entry of power sensor data into non-volatile store. Initiates power meter calibration. Returns to POWER CALIBRATION menu.

C~LIBR~TIOH

P~LCAL

E~<IT

L·

( [

[

3-72

46881-852A

Aug. 89

Page 89

CALIBRATION

SENSOR - Enter or modify sensor data

Before starting power calibration, it is important to ensure that the sweeper has been programmed with calibration information for the particular power sensor in use. The linearity factor and calibration factor data table should be entered from the calibration certificate supplied with the sensor. This information is stored within the sweeper's non-volatile memory.

~;=_=F=~=(.=1=(=1=============.=E~=:L~:.=N=C=I=====7=9=~=.~

~:~LF 1 GHz 99.45

usm

"0 261086

CHL_F 113Hz

The sensor data editor allows the following data to be entered.

UN F

CAL

SERL NO

USER NO

Editing power sensor data

The rotary control or step keys are used to select a parameter for numeric entry. The current selection is displayed on row 4 of the LCD directly above the step keys. Numeric entry should be terminated using the [kHz/int] units key.

Linearity factor. (Range 0.10 - 14.99)

Calibration factor. This is stored and 500 MHz and then at 1 GHz intervals between 1 and 20 GHz and 0.5 GHz intervals between 20 and 26.5 GHz.

(Range 70.00 - 100.00).

Sensor serial number. This may be entered to remind you to which sensor the linearity and cal. factor data applies.

(Range

An optional reference number which can be employed, for

example, to show the power sensor calibration date.

(Range 0 - 999999).

0 -

999999).

E:X:

I T

10, 30, 50, 100, 300

~I ~I

46881-852A

Aug. 89

3-73

Page 90

CALIBRATION

PM CAL - Power meter 50 :MHz calibration

Following selection, the sweeper displays a message reminding you to check that the

power sensor data is correct.

P(l11IER ~1E.TEF-:

Hm}E==,?=O=U=E=t4T=E=F.=.:E="[J='=C=O=R=RE=C=:T=::=,E=N=S=O=R=(=)A=T=R=,?=.J

\·'ES t~O

50 l'IHz C!=IL

NO YES

COHNECT

[

EXIT

PROCEED Initiates power meter 50 MHz calibration.

Returns to the power calibration menu. Allows power meter 50 MHz calibration to proceed.

PO~.iE:F.: POuIEF.:

PROCEED EXIT

I1ETER SEt'60F: TO P~1

~;0~1Hz

C:AL

REF

OUTPUT

Aborts power meter calibration and returns to the sweeper power calibration menu.

POuIEF: METEI':

IN PROGRESS _~

5(1

MHZ~

On completion of the power meter calibration the main POWER CALIBRATION menu is again presented.

46881-852A

3-74

Aug. 89

'III

i••

I",

...

Page 91

:,I

••

CALIBRATION

LIMITS - Entry of frequency limits for power calibration

On selection of LIMITS in the POWER CALmRATION menu, the following display appears to indicate that the use of limits restricts the valid frequency range of the power calibration:

WRRNING : LIMIT~ RESTRICT THE FREQUENCY

~:RNGE OF THE POI..JER CRL IBRRT IO~~.

ABORTPROCEED

PROCEED Calls up the Lllv1ITS menu

ABORT Returns to the main POWER CAl1BRA TION menu

The LIMITS menu is of the form:

CRLIBRRTION LIMITS

LOWER 6.5000GHz UPPER 8.8000GHz

[ J

LOIJJER UPPER

LOWER

UPPER

EXIT

Upper and lower frequency limits may be of any value within the range 10 MHz to 26.6 GHz provided the span is greater than or equal to 500 MHz.

Note •••

For a standard user calibration over the full frequency range of the sweeper, the lower limit must be 10 .MHz and the upper limit 26.6 GHz, otherwise a limited calibration will be performed.

Allows entry of lower frequency limit.

Allows entry of upper frequency limit.

Returns to main power calibration menu.

EXIT

46881-852A

Aug. 89

3-75

Page 92

CALIBRATION

I :

PROCEED - Start power calibration

Approximately 25 s after initiating the power meter 50 :MHzcalibration, the power

calibration menu is again displayed.

POWER

POWER_MTR

PROCEED

HRVE

YES

'IOU

I ============:=====:============:::::====~l

C:[lt~HECT

PROCEED

1,___

r------

Displays warning message.

PO~.IER CRlIBRRTION

CALIBRATED THE POWER NETER

VES NO

Starts calibration process. NO Returns to the power calibration

F'Ol\IEF: CRL I E:Rf.lT]Ot~

F'OL-IEF.:

PROCEED R80RT

The sweeper begins acquiring linearity data (see first display below) and then flatness data (see second display below). For a User calibration, the progress of the power calibration process is indicated by the series of dashes progressively filling row 3 of the display. This does not occur for a Limited calibration, when power calibration data is acquired over a restricted frequency range only.

F'OldEF.:

COLLECTING LINEf.lRITY Df.lT~

C~LIBR~TION

LIMITS

SENSO~:

CRL I E:F-:f.lTI Ot~

PROCEED ~BORT

SIJ.lEEF'H:

OUTPUT

menu.

[

!.~

r..•·

~==:::::::::::::::==P=O=~,=E=F.:=l=-:R=L~I~E~:F.~:H;T~I=Ot=~========~l

II)

~~::~~~:~~_~:~~~:~=_:"'TH

R80RT'

ABORT

Note ••.

For a Limited calibration (power calibration over a limited frequency range), the calibration progress indication (the series of dashes) will not be present.

3-76

Returns to power calibration menu.

46881-852A

Aug. 89

r •

! .

...

Page 93

CALIBRATION .

STORING TIlE CALIBRATION

When calibration has been completed the data can be stored. Which screen is displayed will depend upon whether it is a user calibration in progress or a limited calibration. For a user calibration the screen will be:

CAL IBRflTI

[

USERl (USER2)

When the new calibration has been assigned to either User1 or User2 the sweeper prompts for an identification number of up to 8 digits.

USER 1 12345678

For a limited calibration the screen will be:

[

-------------._------

USERl USER2

C~llBRm 1011

LIMITEDl LIHITED2 EXIT

ot~

COMPLETE

SELECT STORE

Assigns the newly acquired calibration data to the USERl

(USER2) store.

CALlBRRTIOH

COI'IPLETE

SELECT STORE

EXIT

!Co

I I

LIMITED! (LIMlTED2)

L 11'11TED1 12345678

EXIT

~ WRRHlNG: CRLIBRATlOll DRTA HOT

46881-8S2A Aug. 89

CAL

STORE

Assignes the newly acquired calibration data to

LIMITED1 CLIMITED2)store.

I BRRT I Ot~

Returns to the calibration main menu. Note that if the calibration data has not been stored, a warning is dis- played. If EXIT is selected a second time, the new calibration is lost.

STORED

EXIT

3-77

Page 94

CALIBRATION

TRANSFER TO PRIMARY

The calibration data in the user stores can be transferred to the primary calibration

store.

CALIBRATION

CAUTION

The transfer function overwrites the primary calibration. Access to this facility . should be restricted to authorized personnel.

[

ID 110588

CURRENT

SELECT

TRANSFER

Selects transfer facility.

~============~=========~======~

EtHER

Transfer to the primary calibration store is protected by a second six digit authorization code.

OPERRTING

CRL : PRIMRRY

CRL

TRm·t::.FEF-:

i=ll1THOR I

SRT

HOURS 200

TRAt~SFER

ON CODE

D<: I T

[

::J

EXIT

If the authorization code is entered correctly, the display is as shown above.

USERl

USER2

EXIT

Note ...

Limited calibrations cannot be transferred into the Primary calibration store.

H:Rt6FH:

USERl

Transfers from USERl to the primary calibration.

Transfers from USER2 to the primary calibration.

Returns to the calibration main menu.

F'F.:II'lRI':'/

USER2

CRL

3-78

46881-852A

Aug. 89

Page 95

CALIBRATION

ERROR CONDITIONS

If an error condition arises during calibration, an error screen is displayed similar to the one shown below. An error condition encountered during calibration in general indicates a problem with the sweeper hardware. The one exception is error 42 which indicates GPIB instrumentation failure. If this error occurs the private GPIB connections

should be checked. If these appear satisfactory the addresses of the devices on the private GPIB should be checked to ensure they are those expected by the sweeper. Refer

to the section on private GPIB status in Chap. 3-3. All other fault conditions are

described in the Service Manual.

EXIT

r-~~

L,'_O_F.:_Cl_-IC_"E_' _

CHL I BRRT I ON TE~'l'l I NRTED

42 REFEF: TO SEPtJ I

=============

Returns to the calibration main menu.

flRHURL

E><:IT

46881-852A

Aug. 89

3-79

Page 96

co o

,:..

»~

C I

co CD

'tTI

CD'"

W»

.--,

o »

ffi

:D ~

--,

"'~

1"--

1',--,

•

,--,

--,.-~,

Page 97

Appendix A

SWEEPER PARAMETERS

FORMAT

The sweeper is controlled by the parameters listed in the following tables. The

format for presenting the parameter tables is as follows:

The parameter tables are divided into groups containing a number of related para- meters. The groups correspond to those used in the programmable key programmer (see Chap. 3-2, Table 3-2).

For each numeric parameter its minimum and maximum permitted values are given.

Note that the allowed range of a parameter may be greater than its specified range as

given in the Performance Data section of Chap. 1. For non-numeric parameters each state is given.

Some parameters may not be assigned to soft keys. These 'display only' para- meters are indicated by a [D]. Similarly, a few parameters designated 'soft key only' are indicated by an

[S].

TABLE A-I FREQUENCY PARAMETERS

Name

LlF

MKFREQ

AM_FREQ

The reference marker frequency,

to E) which is designated 'reference'. In the standard marker configurations A to E are manipulated indirectly. It is permissible to change the frequencies of markers directly if required.

Description

Start frequency Stop frequency Centre frequency Frequency span Marker A Marker B Marker C Marker D Marker E

Ref. marker frequency Marker sweep width Frequency increment AM frequency

'MK_FREQ,

Minimum

2 :MHz 2 MHz 2 MHz 0 2 MHz 2 MHz 2 MHz 2 MHz 2 MHz 2 MHz

0 26.598 GHz [DJ

500 kHz

1 kHz

is equal to the value of that marker (A

Maximum

26.6

26.598

26.6 GHz

26.6

26.6 GHz

26.6

26.6 GHz

10.0

100 kHz

GHz GHz GHz GHz

GHz

46881-852A

Aug. 89

App. A-1

Page 98

SWEEPER PARAMETERS

TABLE A-2

Name

PI P2 PLl (dB) SLP

Name

PI P2 PLl (mW)

Although the units are different, PI (dBm) and P2 (dBm) always have the same

power values as P1 (mW) and P2 (mW).

Name

Description

Power level Stop power Power step Power slope

TABLE A-3

Description

Power level

Stop power

Power step

TABLE A-4 TIME PARAMETERS

Description

POWER (dBm) PARAl\1ETERS

Minimum

-15.0 dBm

0.0 dB

0.0 dB/GHz

POWER (mW) PARAMETERS

Minimum

.0316 mW .0316

0.1 mW

Minimum

Maximum

+20.0 dBm +20.0 dBm

5.0 dB

+20.0 dB/GHz

Maximum

100 mW 100 mW

20 mW

Maximum

TIME TLl

Name

H M

S DY

YR OP_HRS

USR_H RS

CONTRST INTLl

S_ADDR P ADDR DS_NPOS

ALT MEM

RATE LAST_KEY mks_on 6S00_mks

Forward sweep time Time step

TABLE A-S INTEGER PARAMETERS

Description

Clock hours Clock minutes Clock seconds Calendar day Calendar month Calendar year Total Instrument operating hours User settable operating hours LCO contrast Integer step System GPIB address

Private GPID address Number of (digital)

sweep positions 1

Alternate sweep memory 0 Rotary control rate 0 No. of last key pressed 0 Marker on/off status 6500 line marker status

10 ms

Minimum

1 1

1988

1 1

33.5

10 s

Maximum

23 59 59 31

2030

99999 [0]

99999 20 10

4096 20

1000 [D] 65 [D] ABCDE [D]

ABCDE [D]

[0]

App.A-2

46881-852A

Aug. 89

Page 99

SWEEPER PARAMETERS

TABLE A-6

Name

RAMP OFFSET OFFSET DAC LEVEL

SCALE

VERN BAND Frequency band CONTROL 0 CNTRL A CNTRL B PROG

Diagnostic parameters are used during calibration and service.

Manual.

Name

Description

o -

V ramp position

Level DAC Scale DAC Vernier DAC

TABLE A-7 NON-NUMERIC PARAMETERS

Description

DIAGNOSTIC PARAMETERS

Minimum

0 0 0

0 0

0 255 0 255 0

Maximum

4095 65535 65535 65535 4095 4 65535

Refer to Service

States

cnlr_tr filter swp_tr

ale

sweep am blank mk_on analysr(8) pwr_mtr[9] counter[6] plotter[5] mk_swp altern man_aIt vernier mk ref mk_stp on/off mkr_Ll d_swp ds_dir

rf on

Counter trigger CW filter Sweep trigger

Automatic level control

Sweep select Amplitude modulation Retrace blanking

Marker on/off

6500

on/off indicator

6960

on/off indicator

2440

on/off indicator

Plotter onloff indicator

Marker sweep Alternate sweep select Alt. sweep indicator Vernier select

Reference marker

Stop marker

All markers on/off

line marker ~ select Digital sweep Digital sweep

step direction RF during parameter change Initiate single sweep

off, fl, f2, mk off, on int, ext, line, single

int,

ext+,

int, ext off, on off, retrace on/off [S] off, on off, on [D] roff, on [D]

off, on off, on off, man, auto current, memory off, on A,B,C,D,E A,B,C,D,E

ext-, mtr

[DJ

[D)

[S]

off, on, on[LlF] off, on

up,down

normal, always ready, sweeping, inactive

[D]

46881-852A

Aug. 89

App. A-3

Page 100

SWEEPER PARAMETERS

TABLE A-8 NON-NUMERIC 'ACTION' PARAMETERS

Name Description

init cf=ref transfr skip

Action parameters have no states. When a soft key assigned to one is pressed the

appropriate action is initiated immediately.

Initiate private GPIB

Assign CF from reference marker Make the current marker sweep permanent 6500 brightline skip to next line marker

[S] [S]

[

App.A-4

46881-8S2A

Aug. 89