e2v Stellar N6312C Manuel utilisateur
HBN63xx-1 Issue 8, July 2003
186/3511
N63xx Series
Ku-Band Antenna Mount
Amplifier Product Range
Operation Manual
#2003 e2v technologies limited
This work must not be copied in whole or in part without the prior written permission of e2v technologies limited.
e2v technologies, Waterhouse Lane, Chelmsford, Essex CM1 2QU, UK
Telephone: +44 (0)1245 493493 Fax: +44 (0)1245 492492 Internet: www.e2vtechnologies.com
Holding Company: e2v holdings limited
This Operation Manual covers the following am-
plifier type numbers:
N6312, N6312C, N6312D, N6312DUA, N6312DUB,
N6312UA, N6312UB, N6312W, N6312DW
N6315, N6315C, N6315D, N6315DUA, N6315DUB,
N6315UA, N6315UB, N6315W, N6315DW
N6318, N6318C, N6318D, N6318DUA, N6318DUB,
N6318UA, N6318UB, N6318W, N6318DW.
SAFETY NOTES
The following warnings and precautions are for your safety and the prevention of
injury. Please read them carefully and observe at all times when installing or operating
a Stellar Travelling Wave Tube Amplifier. Hazard warning signs, as defined in BS5378
Safety Signs and Colours, are used on the equipment to highlight any possible
hazards.
Earthing
A protective earth must be connected to the amplifier before applying the mains
supply. This protective earth must only be removed after disconnecting the amplifier
from the mains supply. The protective earth must be connected to the local system
earth point, must be capable of carrying 30 A and must conform to the regulations in
the British Standard Codes of Practice BS7430 (1991 Earthing), or equivalent
national regulations.
Mains Supply
A mains supply disconnection device must be provided to isolate this amplifier from
the mains supply source. Either a socket outlet or a two pole isolation switch must be
used as the mains supply disconnection device, and it must be easily accessible. The
mains connector must not be used as the mains supply disconnection device.
Toxic Material
The Travelling Wave Tube (TWT) within the amplifier contains beryllium oxide. Dust
created by breakage, or fumes from a beryllium oxide fire, are highly toxic if inhaled,
or if particles enter the body via a cut or abrasion.
Consult e2v technologies and the appropriate national authorities for details
regarding the disposal of damaged or old TWTs and amplifiers.
HBN63xx-1, Issue 8, Page 2
High Voltage
High voltages in excess of 6 kV are present within the amplifier. However, the
equipment is designed so that personnel cannot come into contact with high voltage
circuits unless the covers are removed.
RF Radiation
Exposure of the human body to microwave radiation can constitute a hazard (ANSI/
IEEE C95-1-1992). Personnel must be protected from microwave energy produced by
the TWT.
All RF connectors must be correctly fitted before operation, so that there is no
leakage of RF energy. The amplifier must not be operated unless the RF output
connection is correctly terminated. It is particularly hazardous to look into open
waveguides, coaxial feeders, or transmitter antennae when the amplifier is operating.
Input Drive
Damage to the amplifier may occur if the RF input drive level or the input frequency
are outside the limits given in the specification (section 8, also summarised in section
3.2).
Environmental
*Do not block, or poke objects through, the amplifier ventilation slots.
*Do not spray aerosol cleaners directly on to the amplifier surfaces when
cleaning.
*Do not operate the amplifier on an unstable or unsafe surface.
*Ensure that all cables cannot be walked on, tripped over or damaged by
furniture or movable equipment.
*Do not place objects inside the waveguide.
STANDARDS COMPLIANCE
Stellar amplifiers comply with the following requirements. Further details may be
provided if necessary.
*EEC Directive 89/336/EEC Electromagnetic compatibility.
*EEC Directive 93/97/EEC Satellite earth station equipment.
*EEC Directive 73/23/EEC Low voltage directive
e2v technologies’ quality management system is certificated to the requirements of
ISO9001.
HBN63xx-1, Issue 8, Page 3
CUSTOMER CARE
Stellar 24-Hour Hotline
In the event of a Stellar product operational problem or urgent application
enquiry:
1. Complete a Product Service Report Form before calling the Hotline. A copy can
be found at the back of this manual.
2. Contact the Stellar Hotline on +44 (0)1245 355398, where your enquiry will be
dealt with.
Return Procedure
In the event of a Stellar product requiring return to e2v technologies:
1. Have as many of the following details as possible to hand before contacting e2v
technologies. This will help us to respond promptly to your request.
*Type number (found on the end panel, below the control interface socket).
*Serial number (found on the end panel, below the control interface socket).
*Has the product been damaged?
*Description of any operational fault or problem.
*Return address.
2. The Customer Service Team will issue you a Reference Number for the return.
3. Complete a Product Service Report Form (a copy can be found at the back of this
manual), noting in particular any unusual occurrences before or at the time of
failure. The form must be returned with the product.
4. If the original packaging is in good condition, use it to return the product. If the
original packaging is damaged, e2v technologies can supply suitable replacement
packaging for a small charge.
5. Clearly mark the outer packaging with the following information:
*Reference number.
*Type number.
*Serial number.
*Return address.
For further details, refer to the e2v technologies Standard Conditions of Warranty, a
copy of which can be found at the back of this manual.
HBN63xx-1, Issue 8, Page 4
CONTENTS
SAFETY NOTES ......................2
STANDARDS COMPLIANCE .................3
CUSTOMER CARE .....................4
Stellar 24-Hour Hotline ...............4
Return Procedure .................4
CONTENTS ........................5
1 THANK YOU FOR BUYING STELLAR ............6
1.1 Range of Options .................6
2 CARE OF YOUR AMPLIFIER ................7
2.1 Storage .....................7
2.2 Handling ....................7
2.3 Unpacking ....................7
2.4 Cleaning ....................7
2.5 Maintenance ...................7
3 INSTALLATION CONSIDERATIONS ............8
3.1 Mounting ....................8
3.2 RF Connections ................ 10
3.3 Cooling Considerations .............. 11
3.4 Mains Supply Connection ............ 13
3.5 User Interface Connections ............ 15
4 BASIC OPERATION OF THE AMPLIFIER ......... 17
4.1 Applying The Mains Supply ............ 17
4.2 Mains Supply Interruptions ............ 17
4.3 Functions ................... 17
4.4 Upconverter Operation .............. 18
4.5 RF Sample Port ................ 19
5 USER INTERFACES .................. 20
5.1 Pin Identification ................ 20
5.2 User Interface Features ............. 21
6 RS-485 SERIAL BUS .................. 27
6.1 General Description and Features ......... 27
6.2 Protocol .................... 32
6.3 Summary Of Command Messages ......... 35
6.4 Examples Of Command And Response Messages . . . 36
6.5 Application Notes ................ 40
7 FAULT FINDING ................... 41
8 SPECIFICATION .................... 43
8.1 Electrical ................... 43
8.2 Mechanical .................. 43
8.3 Environmental ................. 44
8.4 RF Characteristics ................ 44
9 RELATED DOCUMENTS ................ 44
APPENDIX A ...................... 45
APPENDIX B ...................... 46
APPENDIX C ...................... 47
APPENDIX D ...................... 48
APPENDIX E ....................... 49
HBN63xx-1, Issue 8, Page 5
1 THANK YOU FOR BUYING STELLAR
Thank you for buying a Stellar TWTA. This e2v technologies antenna mount
amplifier range provides RF power amplification at up to 180 W in the Ku-band. The
amplifier is:
*Compact
*Lightweight
*Portable 7can run off a wide range of mains input voltages and frequencies
*Designed for high reliability.
Before using your new amplifier, we recommend that you spend a little time to read
this manual to familiarise yourself with its operation and features.
If you have any further questions, or recommendations about this manual, please
contact your distributor.
In addition to this manual your amplifier should be supplied with:
*a mains connector plug,
*a control connector plug,
*test results,
*an air inlet cowl,
*6-32 UNC-2A x
1
/
2
-inch waveguide screws (4 off).
1.1 Range of Options
The N63xx series of antenna mount amplifiers includes the following variants and
options:
RF output power variants
120 W (N6312), 150 W (N6315) and 180 W (N6318)
RF system options
Product type numbers with a C suffix indicate that the unit is not fitted with an
integrated solid state preamplifier.
Product type numbers with a D suffix indicate that the unit is fitted with a digital
electronically variable attenuator.
Product type numbers with a UA or UB suffix indicate that the unit is fitted with
an integral L-band to Ku-band upconverter (see section 4.4 for upconverter
details).
Product type numbers with a W suffix indicate that the unit is capable of
operating over the wider bandwidth of 12.75 to 14.5 GHz.
HBN63xx-1, Issue 8, Page 6
2 CARE OF YOUR AMPLIFIER
2.1 Storage
*Store the amplifier in its normal horizontal orientation
*Storage temperature is from 740 to +80 8C.
*Do not use amplifier boxes to support the weight of any other item.
*Retain the amplifier boxes for future use.
*Avoid severe shocks.
2.2 Handling
The amplifier nominally weighs 12 kg, so care must be taken when attempting to lift
or carry it.
2.3 Unpacking
Only install and use the amplifier within the specified environmental limits.
2.4 Cleaning
The amplifier is designed to be used in harsh environments, without additional
protective covers.
The internal forced air cooling system relies on the internal and external airways being
free from blockages. The cooling air enters and exits the unit through slotted panels,
which are designed to prevent large items of foreign matter from entering and
potentially blocking the internal airways. A maintenance plan should be developed to
check and clean the amplifier slotted panels regularly, along with any external filters/
restrictions. The frequency of cleaning will be dependent upon the installation and
the environment. The maintenance plan should be regularly reviewed and modified
according to changes in the environment (this can be seasonal, e.g. airborne seed
pods can cause regular blockages at certain times of the year).
The paint used on this product is designed to provide maximum reflection of solar
radiation; for this reason, any exposed faces of the amplifier should be regularly
cleaned with soapy water to maintain these reflective characteristics. Dirty exposed
faces will absorb more solar radiation, increase the temperature within the unit and
ultimately reduce the reliability and life of the amplifier.
Do not use detergents or other cleaners without consulting e2v technologies. The
amplifier must be disconnected from the mains supply before cleaning.
2.5 Maintenance
Airways should be checked regularly for blockages (see section 2.4).
Desiccant should be replaced every 3 to 5 years, depending upon environmental
conditions. The typical life of desiccant is 5 years in sub-tropical conditions, assuming
that the seal on the lid has not been disturbed.
HBN63xx-1, Issue 8, Page 7
3 INSTALLATION CONSIDERATIONS
3.1 Mounting
The amplifier can be:
*used free standing;
*mounted in a flight case;
*mounted on the roof of a vehicle;
*mounted to an antenna system.
The amplifier has a flange which should be used to mount the amplifier solidly to the
chosen platform. Six M5 clearance mounting slots (three each side) are provided, to
allow fixing from above. Suitable load spreading washers should be used to protect
the amplifier from damage during the mounting process. Suitable locking nuts and/
or locking washers should be used to prevent the amplifier from working loose under
vibration and shock conditions that each installation may impose. This is especially
important for mobile applications.
The amplifier should be positioned so as to avoid the direct entry of rain water into
the ventilation slots. The amplifier is provided as standard with an air inlet cowl, the
normal orientation of which is pointing towards the base of the unit, to avoid the
direct entry of driving rain. When used with this arrangement, the unit should not be
mounted closer than 42 mm from any flat surface, to avoid choking of the forced air
cooling system (see figure 1).
Figure 1 Mounting distance from a flat surface (cowl fitted)
"
"
143 mm MIN
COWL
FLAT SURFACE
HBN63xx-1, Issue 8, Page 8
Circular duct adaptors and alternative cowl orientations are discussed further in
section 3.3.2.
If the amplifier is to be installed where a secondary rain cover is used, the air inlet cowl
may be removed and the amplifier mounted closer to a flat surface (see figure 2).
Figure 2 Mounting distance from a flat surface (no cowl).
When designing the installation, a space of approximately 162 mm should be allowed
for the disconnection and the bend radius of connection cables (see figure 3).
Figure 3 Interface connector and cable space allowance.
"
"
106 mm MIN
FLAT SURFACE
"
"
162 mm NOM
HBN63xx-1, Issue 8, Page 9
3.2 RF Connections
RF input is via an N type connector mounted on the end of the amplifier. RF input
signals applied to this connector must be within the frequency range and below the
maximum RF input power levels given in the specification (see section 8) and
summarised in the table below. Ensure a suitable grade of cable is used externally.
Product type number Maximum RF input drive level RF input frequency range
N63xx and N63xxD 10 mW 13.75 to 14.5 GHz
N63xxC 1 W 13.75 to 14.5 GHz
N63xxUA and N63xxDUA 1 mW 950 to 1450 MHz
N63xxUB and N63xxDUB 1 mW 950 to 1700 MHz
RF output is via a waveguide connection on the end of the amplifier. Waveguides
type WG17 or WR75 may be used. The waveguide flange (type 154 IEC UBR 120,
with 4 tapped holes 6-32 UNC) requires four screws 6-32 UNC-2A x
1
/
2
-inch fully
threaded, as supplied.
If the amplifier is to be used in applications where it is exposed to rain or subjected to
condensation, all attempts should be made to prevent moisture ingress into the
waveguide system. It is recommended that all external waveguide joints are made
using flanges fitted with ’O’ rings to prevent moisture ingress. The amplifier is
supplied with a plain waveguide flange, so the external mating flange should include
an ’O’-ring and groove.
An optional waveguide window is available, which when fitted correctly stops the
ingress of moisture into the amplifier waveguide system. The waveguide window is
approximately 10 mm in length and is fitted between the amplifier output flange and
the external system flange (see figure 4), with the ‘O’-ring groove toward the
amplifier. Longer fixing screws are supplied with the waveguide window kit.
Figure 4 Waveguide window option position
"
"
WINDOW
EXTERNAL WAVEGUIDE
RF OUTPUT FLANGE
"
HBN63xx-1, Issue 8, Page 10
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