e2v N6081 series User manual

N6081 Series
Operation Manual

e2v technologies
N6081 Series
Operation Manual
#e2v technologies 2004 HBN6081-1 Issue 5, January 2004
186/3591

SAFETY NOTES
The following warnings and precautions are for your
safety and the prevention of injury. Read them carefully
and observe at all times when installing or operating
the N6081. Hazard warning signs, as defined in
BS5378 Safety Signs and Colours are used on the
equipment to highlight any possible hazards.
Mains Supply
(Amplifier Only)
A mains supply disconnection device must be pro-
vided to isolate the amplifier from the mains supply
source. Either a socket outlet or a two-pole isolation
switch must be used as the mains supply disconnec-
tion device, and it must be easily accessible. The
mains connector must not be used as the mains
supply disconnection device.
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
within the RF system.
All RF connectors must be correctly fitted before
operation, so that there is no leakage of RF energy. The
control unit 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 control unit
is operating.
High Temperature
High power RF loads connected to RF systems can be
at temperatures in excess of 80 8C.
Maintenance
Do not remove the covers unless the supply is
disconnected. The supply should not be reconnected
until all of the covers have been refitted.
ENVIRONMENTAL
*Do not spray aerosol cleaners directly on to its
surfaces when cleaning.
*Do not spill water onto the control unit.
*Do not operate the control unit on an unstable or
unsafe surface.
*Do not install the control unit in a damp area.
*Do not expose the control unit to rain or other
sources of water.
*Ensure that all cables cannot be walked on,
tripped over or damaged by furniture or movable
equipment.
*Do not place objects inside any of the wave-
guides.
page 2 HBN6081-1

STANDARDS
COMPLIANCE
This control unit complies with the following require-
ments. Further details may be provided if necessary.
*EEC Directive 89/336/EEC Electromagnetic com-
patibility.
*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 ISO 9001.
CUSTOMER CARE
Stellar 24-Hour Hotline
In the event of a Stellar product fault or urgent
application enquiry, dial the Stellar Hotline telephone
number given below.
At the rear of this manual you will find a blank ‘Fault
Report Form’. Complete this form before ringing the
Hotline; this will help us to respond promptly to your
request.
Telephone: [phone]
International: [phone]
HBN6081-1 page 3

CONTENTS
Page
1 Thank You For Buying Stellar ........................ 5
2 Care of the Control Unit .......................... 5
2.1 Storage ............................... 5
2.2 Handling .............................. 5
2.3 Unpacking .............................. 5
2.4 Cleaning .............................. 5
3 Installation Considerations ......................... 6
3.1 Mounting .............................. 6
3.2 RF Connections ........................... 6
3.3 Cooling Considerations ......................... 6
3.4 Interface Connections ......................... 6
4 Operation of the Control Unit ........................ 6
4.1 Applying The Voltage Supply ...................... 6
4.2 The Amplifier Search Process ...................... 6
4.3 Warm-up .............................. 7
4.4 Standby .............................. 7
4.5 Transmit .............................. 7
4.6Off................................. 7
4.7 Fault ................................ 7
5 Measurement and Monitor Functions ..................... 8
5.1 Power (watts) ............................ 8
5.2 Power (dBW) ............................. 8
5.3 Helix Current ............................. 8
6 Gain Setting (Only available on the N6081D) .................. 8
6.1 Set Gain (result in watts) ........................ 8
6.2 Set Gain (result in dBW) ........................ 8
7 Amplifier Interface ............................. 9
7.1 Introduction ............................. 9
7.2 Interconnections (see also Appendix A) .................. 9
7.3 Interconnections for -01 variant (see also Appendix B) ............. 9
7.4 Termination Resistors ......................... 9
8 Fault Finding ...............................10
9 Specification ...............................10
9.1 Electrical ..............................10
9.2 Mechanical .............................10
9.3 Environmental ............................10
10 Related Document ............................10
page 4 HBN6081-1

1 Thank You For
Buying Stellar
Thank you for buying this Stellar product. This e2v
technologies control unit allows the remote control of
one Stellar amplifier.
Before using your new control unit, we recommend
that you spend a little time reading this manual to
familiarise yourself with its operation and features.
If you have any further questions, or recommendations
on this manual, contact your distributor.
2 Care of the
Control Unit
2.1 Storage
*Store the control unit in its normal horizontal
orientation
* Storage temperature range is from 740 to +70 8C.
*Do not use control unit boxes to support the
weight of any other item.
*Retain the control unit boxes for future use.
*Avoid severe shocks.
2.2 Handling
The control unit nominally weighs 0.5 kg; no special
handling precautions are required.
2.3 Unpacking
Only install and use the control unit within the specified
environmental limits.
2.4 Cleaning
The control unit is designed to be rack mounted and is
for use in protected environments.
The front panel can be cleaned with a damp cloth. Do
not use detergents or other cleaners without consulting
e2v technologies. The control unit must be discon-
nected from the Stellar amplifier before cleaning.
HBN6081-1 page 5

3 Installation
Considerations
3.1 Mounting
The control unit is designed to be installed in a
standard 19-inch rack mount system and should be
mounted and operated in the normal horizontal
orientation.
Fixing holes of the standard pattern are provided on
the 1U front panel; these provide adequate support for
the unit.
The control unit is designed to be mounted remote
from the amplifier and the RF system.
When designing the installation, a space of approxi-
mately 100 mm should be allowed behind the rear
panel of the control unit for the disconnection of and
the bend radius of the interconnection cable.
3.2 RF Connections
Always disconnect the interconnection lead from the
control unit to the amplifier before installing or
removing any RF system components.
3.3 Cooling Considerations
The control unit is designed to operate in ambient
temperatures between 0 and +50 8C; it requires no
additional ventilation. Care should be taken when
choosing the location of the control unit, to avoid
external heat sources that may lead to the ambient
temperature exceeding the above limit.
3.4 Interface Connections
As there are many installation variations, the cabling
between the amplifier and control unit is not provided
as standard. Contact e2v technologies for details of
interface cable accessories.
For details of cable termination instructions including
cable type etc., see section 7.
4 Operation of the
Control Unit
The N6081 is used to control an amplifier from the
following product series:
N61xx (e.g. N6132D, N6150D)
N63xx (e.g. N6312, N6318D)
N64xx (e.g. N6440)
4.1 Applying The Voltage Supply
The N6081 requires no external power supply as it is
powered by the amplifier via a dedicated line within the
control cabling.
Before connecting the control cabling, the operator
must be satisfied that:
*Safety requirements are complied with (see the
safety notes at the front of this manual)
*The amplifier is off.
Connect the control cabling from the amplifier to the
15-way D-type socket on the back of the N6081 and, if
it is safe to do so, apply power to the amplifier.
4.2 The Amplifier Search Process
As soon as power is supplied to the amplifier and the
control cabling is connected, the N6081 will initiate the
amplifier search process. This will be apparent as the
following message will be momentarily displayed on
the N6081 display (if the HPA is found quickly, this
message may not be seen):
The N6081 will now search through the 64 available
addresses at a Baud rate of 9600 until communication
is established. This process will continue until an
amplifier is found. When an amplifier is found, a
message will appear on the display, similar to the
following:
This message indicates that communication has been
established with the amplifier whose address is 40H.
This message will be displayed for 2 seconds. It should
be noted that if at any time communication is lost with
the amplifier, this process will be repeated.
The amplifier fan will be rotating at low speed and the
controller "OFF" LED will be lit.
Search
Found
HPA @ 40H
page 6 HBN6081-1

The display will then show the following:
4.3 Warm-up
Press the STBY or XMIT key whilst in the "OFF" state to
begin the TWT cathode warm-up process (180
seconds). In this state power is only applied to the
TWT cathode heater.
"OFF" LED will have gone out.
WARM-UP LED will be lit.
Display remains unchanged.
4.4 Standby
If the STBY key had been pressed, from the "OFF"
state, then after 180 seconds the STBY LED will light
and the WARM-UP led will go out.
Display remains unchanged.
If there are no faults, the amplifier is now ready to go to
the transmit state.
4.5 Transmit
If the XMIT key had been pressed, from the "OFF"
state, then after 180 seconds the XMIT LED will light
and the WARM-UP LED will go out.
The amplifier will operate.
Amplifier fan will rotate at full speed.
Display will now show the output power in watts.
If the XMIT key had been pressed, from the STBY
state, then the amplifier will operate immediately.
4.6 Off
Press the "OFF" key and the Amplifier will return to the
off mode. The display will then show the following:
The Amplifier cooling fans will continue to rotate at full
speed for 120 seconds for TWT cool-down. After the
120 seconds the fans will slow to idle speed.
IT IS RECOMMENDED THAT THE POWER TO THE
AMPLIFIER IS NOT REMOVED BEFORE THE COOL-
DOWN HAS BEEN COMPLETED.
4.7 Fault
If at any time a summary fault occurs, the fault
indicator will be lit and the amplifier will leave the
"transmit" state.
Pwr
Pwr
150 W
Pwr
HBN6081-1 page 7

5 Measurement and
Monitor Functions
5.1 Power (watts)
Once the N6081 has found an amplifier, its display will
show the amplifier’s forward power in watts.
5.2 Power (dBW)
This feature can be selected by pressing the function
select key once. This will display the amplifier’s forward
power in dBW (decibel watts). The reading is only valid
if the forward power is greater than 0 W, otherwise the
reading will be blanked.
5.3 Helix Current
This feature can be selected by pressing the function
select button once more. This will display the helix
current of the TWT in mA.
Note: These functions are only available whilst the
amplifier is in ‘Transmit’ state.
6 Gain Setting
(Only available
on the N6081D)
The Amplifier must be fitted with a digital attenua-
tor (DEVA) for this facility.
6.1 Set Gain (result in watts)
This feature can be selected by pressing the function
select button once more. This will allow the digital
attenuator to be set on the amplifier. This is achieved
by turning the gain select knob on the front of the
N6081D, which will result in a change of forward power
from the amplifier, which will be displayed on the
screen in watts.
Ensure the gain knob is fully anti-clockwise for
lowest power setting
6.2 Set Gain (result in dBW)
This feature can be selected by pressing the function
select button once more. This is in essence the same
feature as above but the amplifier’s forward power is
displayed in dBW. Pressing the function select button
again will result in the display returning to ‘Power
(watts)’ setting and further presses will scroll through
the functions as described.
Ensure the gain knob is fully anti-clockwise for
lowest power setting
Note: These functions are only available whilst the
amplifier is in ‘Transmit’ state.
page 8 HBN6081-1

7 Amplifier
Interface
7.1 Introduction
Connection to the Stellar Amplifier is made via a 15-
way D-type socket for the N6081X series or a 26-way
D-type plug for the N6081X-01 series.
The control unit obtains its power supply (15 V,
100 mA) from the Stellar amplifier via this D-type
connection. The D-type back shell and control con-
nector back shell must have a 3608electrical connec-
tion to the cable screen to prevent Radio Frequency
Interference (RFI) from adversely affecting the opera-
tion of the product.
A screened multicore cable must be used for the
interconnection.
To avoid the risk of crosstalk on the "data commu-
nications" lines, they must be twisted pairs.
The N6081X-01 series also has a 9-way D-type socket
to enable connection to the RF INHIBIT and INV RF
INHIBIT lines.
7.2 Interconnections (see also Appendix A)
41-way amplifier 15-way D-type
connector connector
A ........ 2
B ........ 4
C ........ 3
D ........ 5
E ........ 6
H,P,R,p.......14
J ........ 7
K ........ 8
L ........ 9
U ........ 1
b ........10
c ........11
d ........13
e ........12
Notes: Cable for b and c must be a twisted pair.
Cable for d and e must also be a twisted
pair.
7.3 Interconnections for -01 variant (see also
Appendix B)
41-way amplifier 26-way high density
connector D-type socket
A ........ 8
B ........ 6
C ........ 7
D ........ 5
E ........ 4
G ........10
H ........ 1
J ........19
K ........ 2
L ........25
P,R,p .......20
U ........ 9
b ........24
c ........23
d ........21
e ........22
Notes: Cable for b and c must be a twisted pair.
Cable for d and e must also be a twisted
pair.
9-way connector function
1 ..... INVRFINHIBIT
2 .......notused
3 .......notused
4 .......notused
5 ........0V
6 ...... RFINHIBIT
7 .......notused
8 .......notused
9 .......notused
Note: To enable RF, link pins 1 and 5.
7.4 Termination Resistors
A 120 O
1
/
4
W resistor is to be fitted in the D-type
back shell between pins 12 and 13 (pins 21 and 22 for
the -01 variant).
A 120 O
1
/
4
W resistor is to be fitted in the 41-way
connector back shell between pins b and c and
another 120 O
1
/
4
W resistor between d and e.
HBN6081-1 page 9

8 Fault Finding
If the control unit does not work correctly, consult the
following table before contacting either the Stellar 24-
hour Hotline (see ‘Customer Care’, page 3) or your
distributor for further assistance.
Consult the relevant amplifier operations manual for
descriptions of amplifier fault messages given on the
front panel displays.
Fault experienced Possible cause
No communication
with the amplifier
Interconnecting cable damaged
or unconnected
Amplifier not powered
9 Specification
9.1 Electrical
Prime power:
voltage ............... 15V
current .............. 100mA
9.2 Mechanical
Dimensions (19-inch rack):
width ......... 483mm(19inches)
height ....... 1U,44mm(1.73 inches)
depth .......... 50mm(2inches)
depth with allowance for connectors
and bend radius of cable . . 150 mm (6 inches)
Weight (nominal) ...... 0.5kg(1.1 pounds)
9.3 Environmental
For operation outside these parameters, refer to e2v
technologies for guidance.
Operating temperature ...... 0to+508C
Storage temperature ...... 740 to +70 8C
Vibration .... MIL-STD-810E; common carrier
and field transportation
Shock ...... IECPublication 68-2-27 Part 2
Test Ea 25 g for 11 ms, half-sine
Electromagnetic compatibility . . . EMC Directive
89/336/EEC
Safety ......... LowVoltage Directive
73/23/EEC BS EN 60950
10 Related
Document
*Data Sheet (A1A-N6081 series).
page 10 HBN6081-1

120R
1
/
4
W
120R
1
/
4
W
120R
1
/
4
W
Appendix A
41-way Stellar 15-way D-type
Amplifier connector Controller connector
A2
B4
C3
D5
E6
H14
J7
K8
L9
P
R
U1
b10
c
twisted pairs
11
d13
e12
p

TO N631X 41-WAY CONTROL CONNECTOR
A
B
C
D
E
P
J
K
L
U
b
c
d
e
p
R
H
G
OFF S/O
WARM UP S/O
STANDBY S/O
TRANSMIT S/O
SUM. FAULT S/O
0 V (B)
OFF C/I
STANDBY C/I
TRANSMIT C/I
+15 V (AUX)
TX+
TX7
RX+
RX7
SG
INTERLOCK I/P
INV RF INHIBIT
RF INHIBIT
26-WAY HIGH DENSITY
D PLUG (PL1)
8
6
7
5
4
19
2
25
9
24
23
21
22
20
1
3
10
11
12
13
14
15
16
17
18
26
9-WAY
D SOCKET (SK1)
1
2
3
4
5
6
7
8
9
OFF S/O
WARM UP LED
STDBY LED
XMIT LED
FAULT S/O
OFF SWITCH
STDBY SWITCH
XMIT SWITCH
Vin (+15 V)
RX+
RX7
TX+
TX7
0V
INV RF INHIBIT
NOT USED
RF INHIBIT
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
INV RF INHIBIT
NOT USED
NOT USED
NOT USED
0V
RF INHIBIT
NOT USED
NOT USED
NOT USED
120 R
120 R 120 R
LINK REQUIRED
TO ENABLE RF
Appendix B

E2V Technologies Limited,
106 Waterhouse Lane, Chelmsford,
Essex CM1 2QU, UK.
Tel. or Fax: [phone]
STELLAR HOTLINE FAULT REPORT FORM
Date: Call Time: Tel. No.:
Name: Fax No.:
Organisation:
Location:
Country:
Product Type: Serial No.:
Category: A. 1 Hour B. Next Day C. Next Working Day
Nature Of Problem Or Request (Check appropriate boxes or refer to topic numbers):
Unit Is Defective: Unit Is Malfunctioning:
1 Fuse has blown 11 Low output power
2 Circuit breaker trips 12 High input power
3 No fans operating 13 High reflected power 19 Bad airflow
4 No display 14 High helix current 20 Helix overcurrent
5 No indicators 15 Unit trips 21 Excess reflected power
6 No cathode warm-up 16 Unit trips repeatedly 22 PSU overcurrent
7 No standby mode 17 Unit trips and shuts down 23 PSU too hot
8 No transmit mode 18 Other (see comments) 24 RF load too hot
9 No output power 25 LV PSU fault
10 Other (see comments) 26 Bad HV rail
Difficulties With Control Panel Or Remote Interface:
27 Set-up 31 Hour counters
28 Helix current meter 32 IEEE488 / RS422 / RS485
29 Power meters 33 User port
30 Low power alarm 34 Other (see comments)
Applications Enquiries: Commercial Enquiries:
35 Prime power 41 Data sheets
36 Front panel operation 42 Applications sheets
37 Cooling / ducting 43 Sales contact
38 RF input circuit 44 Other (see comments)
39 RF output circuit
40 Other (see comments)
Comments And Observations:
Please complete this form prior to using the E2V Technologies ‘STELLAR HOTLINE’; it will help us respond
promptly to your request. Be aware that telephone conversations may be recorded.
The completed form may also be faxed or mailed to the address above and should be sent with any unit returned
to E2V Technologies for repair.
9711A-5
For E2V Technologies
use only
CAT:
ENG:
TIME:
SIG:
DR No:

e2v technologies
UK:
e2v technologies limited
Waterhouse Lane Chelmsford
Essex CM1 2QU
Telephone: [phone]
Facsimile: [phone]
France:
e2v technologies sas
Bat. 16 BUROSPACE
F-91572 BIE
`VRES Cedex
Telephone: [phone]
Facsimile: (331) 6019 5529
USA:
e2v technologies inc.
4 Westchester Plaza
Elmsford NY 10523-1482
Telephone: [phone]
Facsimile: [phone]
Canada:
e2v technologies inc.
7956 Torbram Road Suite No. 208
Brampton Ontario L6T 5A2
Telephone: [phone]
Facsimile: [phone]
Holding Company:
e2v holdings limited
Internet: www.e2vtechnologies.com