Marconi 6313 User manual

Operating Manual
H 6313
Vol. 1
10 MHz to 26.5 GHz
PROGRAMMABLE SWEEP GENERATOR
6313
••
©Marconi Instruments Ltd. 1988
No part of this book may be reproduced or transmitted in any form
or by any means, electronic or mechanical, including photocopying,
or recorded by any information storage or retrievat system, without
permission in writing by Marconi Instruments Ltd.
Printed in the UK
Manual pari no. 46881-852A
Print code : 8-8/89
Aug. 89

CONTENTS
Page
Preface
iii
Operating precautions iv
Chapter 1 GENERAL INFORMATION
1-1
Chapter 2 INSTALLATION
2-1
Chapter 3 OPERATION
3-1
3.1 Local operation
3.2 Programmable keys
3.3 Private GPIB operation
3.4 Operation with 6500
3.5 Calibration
3-1
3-33
3-51
3-53
3-63
Appendix A Sweeper parameters
Appendix B Sweeper memory facilities
Appendix C Counter Interface
Appendix D Self test
Appendix E Error messages
Index v
List of tables ix
List of figures ix
ASSOCIATED PUBLICATIONS
GPIB Operating Manual, H 6313 Vol. lA
Service Manual. H 6313, Vol. 2
Part No.
46881-853Z
46881-852A
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46881-852A
Aug. 89
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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 Nature of hazard Reference In manual
&
Dangerous voltages Page iv
~Static sensitive components Page iv
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Precision ·connector Page 3-2
MANUAL AMENDMENT STATUS
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. .
46881-852A
Aug. 89
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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 Class 1, meaning that it is provided
with aprotective 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. If only
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 6 A should be used in the live conductor (e.g.
fitted in the supply plug).
Removal of covers. Disconnect the supply before removing the covers so as to avoid the risk of
exposing high voltage parts. If any internal adjustment or servicing has to be carried out with the supply
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 cause a danger 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
& This equipment contains static sensitive components which may be damaged by handling - refer to
the Service Manual for handling precautions.
iv
46881-852A
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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 Programmable Sweep Generator 6313 with Automatic Amplitude Analyzer 6500
46881-852A
Aug. 89 1-1

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] 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).
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').
[SWPfTRG]
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 (Fl -
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.
Markers
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.
1-2 46881-852A
Aug. 89
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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

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 if the output power is no longer
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).
1-4 46881-852A
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PERFORMANCE DATA
Frequency
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:
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:
46881-852A
Aug. 89
GENERAL INFORMATION
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.
±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.
1-5

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:
ModulatIon
Internal square wave AM
Frequency range:
Frequency accuracy:
Frequency resolution:
Depth
10 MHz to <2 GHz:
2GHz to <12.5 GHz:
12.5 GHz to 26.5 GHz:
Rise and fall time
(10% to 90%):
External pulse AM
Frequency response:
Depth:
Rise and fall time
(10% to 90%):
1-8
GENERAL INFORMATION
±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.
1ms.
3 digits.
o dB/GHz to 20 dB/GHz power over calibrated
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.
1.0 to 100 kHz.
±0.05%.
0.1 kHz up to 32.5 kHz.
1 kHz from 32.5 to 100 kHz.
-55 dBc.
-60 dBc.
-45 dBc.
0.5 us.
DC to 100 kHz.
As internal square wave AM.
As internal square wave AM.
46881-852A
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