Dawn CONTROL-1500A User manual

Inclined-Orbit tracking
Allows single axis tracking for modest-sized
antennas with a motorized declination axis
Three Track Modes
Step Track, Memory & Search modes
supported
Polarization Control Interface
Automatic or manual polarization control for
three-wire PolarotorTM or optional control for
rotating feeds with potentiometer feedback
High-Resolution Pulse Sensor Interface
Ensures accurate Ku-band positioning
Software Controlled Limits
Provides backup to mechanical limits
Dual Speed
For fast slewing, fine positioning, user
programmable
RS-422 PC Control Interface
Automated control with many popular
packages; basic PC-control software is
included
Adapti-DriveTM
Maintains stable speed with varying load
Solid-State Drive Circuitry
Provides reliable, quiet operation, rated at 5A
with over-current protection
Multi-Band Operation
Supports C, Ku and L-band satellites
F E A T URE S
Re m o t e Co n trolle d
A n t e n n a Co n t roller
for S i n gle A x is A n t e n n as
CONTROL-1500A (Specs pg1-2, Manual on pg3)
3340 S. Lapeer Rd Orion, MI 48359-1320 Ph [phone] Fax [phone] [e-mail]
You are entitled to the manufacturer's limited express warranty, if any, that accompanies the product. DAWNco
makes no additional or independent warranty.
All other warranties, express or implied, including the warranties of merchantability and fifitness for a particular
purpose are disclaimed. We do our best to be accurate.
We are not responsible for any typographical, photographic or technical errors. See "Policies for DAWNco" under
the "Answers" button at the DAWNco web site.

PHYSICALPHYSICAL
Size:Size: 19.0”x 3.5”x 9.0” ( rack )
Weight:Weight: 8.5 lbs.
Temperature:Temperature: 0o – 50oC
Input Power:Input Power: 115/230 V AC,50/60 Hz., 40 W
determined by antenna beamwidth (as determined from antenna
size and the frequency band), satellite inclination, and a user
specified maximum allowable error (in dB). STEP_TRACK mode
is active until a time is reached that corresponds to a segment of
the satellite's motion which has previously been stored in the track
table. When this occurs PROGRAM_TRACK mode is activated.
In PROGRAM_TRACK mode the controller smoothly moves the
antenna to azimuth and elevation positions derived from entries in
the track table. The time between movements is determined by
the same factors which govern the time between peakup
operations in STEP_TRACK mode. In particular the user can
specify the maximum allowable error between the antenna's actual
position and the position specified by the track table. By
increasing the maximum allowable error, antenna movements can
be performed less frequently, thus avoiding unnecessary wear on
the antenna actuators. In PROGRAM_TRACK mode the accuracy
of the track table is monitored by periodically peaking up the
receiver AGC signal. If the error exceeds a level set by the user,
all entries in the track table are flagged for update. The period
between these accuracy checks is specified by the user and
typically varies from once a day to once a week.
SEARCH mode is entered from STEP_TRACK mode when the
satellite signal has been lost. When the satellite is located, the
controller re-enters the STEP_TRACK mode.
TRACK MODETRACK MODE
Antenna Size:Antenna Size: 0.4 – 5.0 meters
Maximum InclinMaximum Inclina-a- +/-10ostandard
Tracking Modes:Tracking Modes: S earch, S tep Track,Program
Track
AGC Input:AGC Input: 0 to +10 VDC inputrange,2MΩ
inputimpedance
When using a modest-sized antenna in which the beam may be
steered along the declination axis, (perpendicular to the
geostationary arc) a satellite that is in an inclined orbit may be
tracked with a single-axis antenna controller. The angular width of
the “figure 8” pattern of the satellite’s apparent motion is, in
general, very small. For the mid-latitudes, this width is
approximately:
W = 1.2 x (inclination)2/ 115
or 0.26 degrees for a satellite with an inclination of 5 degrees.
If the antenna beamwidth is larger than the width of the figure 8, it
can track the satellite with single-axis, declination motion. An
11.5m C-band or an 3.8m Ku-band antenna would have a 3dB
beamwidths of about 0.6 degree. Properly aligned, these
antennas could track the satellite with less than 3dB error.
The tracking algorithm used by the RC2000 antenna controllers
can be divided into 3 distinct parts - STEP_TRACK,
PROGRAM_TRACK and SEARCH. To initiate the track process,
the user jogs the antenna to the satellite and verifies the identity of
the satellite. The system then enters STEP_TRACK mode.
In STEP_TRACK mode, the controller periodically peaks the
receiver's AGC signal strength by jogging the antenna. The time
and position are recorded in a track table maintained in the
controller’s non-volatile memory. The interval between peakups is
O P E R A TI O N A L O V E R V I E W
The RC1500 was designed to provide years of reliable operation
through the use of a heavy duty solid-state drive network coupled
with a novel microcontroller-based fault monitoring system. The 5
amp rated drive output capability is adequate for either moving
feed trackers or full-size linear actuators and the Adapti-Drive
digital servo speed control optimizes antenna movement for
today's demanding Ku-band applications. Additional features like
an RS-422 communications port for PC control and a very user-
friendly, menu scheme make the RC1500 a unique and highly
adaptable piece of equipment. Overall, the RC1500 is well
equipped to handle the demanding requirements for cost sensitive
domestic and international inclined-orbit satellite tracking.
T R A C K I N G A L G O RI T H M
S P E CI F I C A T I O N S
DRIVEDRIVE
Output:Output: 36 VDC,10 Amps;150 VA
Sensor Input:Sensor Input: Pulse-type: R eed,Hall Effect,Optical
Polarization:Polarization: S tandard PolarotorTM Interface,
optionalrotating Feed-drive at
voltagesfrom 5 – 36 VDC @2A max
3340 S. Lapeer Rd Orion, MI 48359-1320 Ph [phone] Fax [phone] [e-mail]
You are entitled to the manufacturer's limited express warranty, if any, that accompanies the product. DAWNco
makes no additional or independent warranty.
All other warranties, express or implied, including the warranties of merchantability and fifitness for a particular
purpose are disclaimed. We do our best to be accurate.
We are not responsible for any typographical, photographic or technical errors. See "Policies for DAWNco" under
the "Answers" button at the DAWNco web site.

CONTROL-1500ASingle Axis
Antenna Controller
Operator's Manual
v1.20
CONTENTS SUBJECT TO CHANGE
Jan29,2004
DAWNco • 3340 S. Lapeer Rd • Orion, MI 48359-1320 • Ph [phone] • Fax [phone] • [email protected]
You are entitled to the manufacturer's limited express warranty, if any, that accompanies the product. DAWNco makes no
additional or independent warranty. All other warranties, express or implied, including the warranties of merchantability and
fitness for a particular purpose are disclaimed. We do our best to be accurate. We are not responsible for any typographical,
photographic or technical errors. See "Policies for DAWNco" under the "Answers" button at the DAWNco web site.

TABLE OF CONTENTS
Warranty.....................................................................................................................................6
Chapter 1 INTRODUCTION ...................................................................................................1
1.1 Organization of this Manual.............................................................................................1
1.2 Before You Begin ............................................................................................................2
Chapter 2 BASIC FUNCTION DESCRIPTION.......................................................................3
2.1 Front Panel......................................................................................................................3
2.2 Changing Modes with the MODE Key .............................................................................5
2.3 Mode Descriptions...........................................................................................................5
2.4 Mode Access...................................................................................................................9
2.5 Expert Access................................................................................................................10
2.6 AutoPol..........................................................................................................................10
Chapter 3 INSTALLATION/SETUP ......................................................................................11
3.1 Before You Begin ..........................................................................................................11
3.2 Mechanical and Electrical Installation............................................................................12
3.2.1 Antenna Motor Drive ...............................................................................................13
3.2.2 Position Sense .........................................................................................................14
3.3 Polarization Control .......................................................................................................17
3.3.1 Configuring the CONTROL-1500Afor Use inan Installation that Does Not Employ a
Polarization Control Device...............................................................................................17
3.3.2 Configuring the RC1500 for use with a Polarotor....................................................17
3.3.3 Rotating Feed with Potentiometer Position Feedback.............................................18
3.4 Antenna Drive Polarity and Limits..................................................................................21
3.4.1 Motor Drive Polarity................................................................................................22
3.4.2 Setting Antenna Limits ...........................................................................................22
3.4.3 Polar Mount Adjustment .........................................................................................22
3.5 Slow Speed Adjustment ................................................................................................25
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3.6 Signal Strength Display .................................................................................................26
3.6.1 Controller AGC Potentiometor Adjustment..............................................................27
3.7 Programming Geostationary Satellites ..........................................................................32
3.8 AutoPol..........................................................................................................................33
3.9 Installation and Setup Checklist.....................................................................................34
Chapter 4 – Controller Operational and Programming Modes .................................................36
4.1 MANUAL Mode..............................................................................................................36
4.2 AUTO Mode ..................................................................................................................37
4.2.1 Invalid Data .............................................................................................................38
4.3 REMOTE Mode .............................................................................................................39
4.4 LIMITS Mode.................................................................................................................39
4.5 SETUP Mode.................................................................................................................40
4.5.1 User-Defined Satellite Names.................................................................................42
4.6 RESET Mode.................................................................................................................43
4.7 DELETE Mode...............................................................................................................44
4.8 FIX Mode.......................................................................................................................45
4.9 CONFIG Mode...............................................................................................................45
4.9.1 AutoPol.................................................................................................................46
4.9.2 Remote Communication Parameters ...................................................................46
4.9.3 Slow Speed Code ................................................................................................47
4.9.4 Polarization Motor Option.....................................................................................47
4.9.5 Motor Drive Options .............................................................................................48
4.9.6 Signal Strength Parameters .................................................................................50
4.9.7 Expert Access Flag ..............................................................................................50
4.9.8 Reset System Data ..............................................................................................51
Chapter 5 SPECIFICATIONS...................................................................................................53
Chapter 6 TROUBLESHOOTING/ALARM CODES ................................................................54
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6.1 SYSTEM ERROR CODES ............................................................................................54
LOW BATTERY ................................................................................................................54
ANT LIMITS ......................................................................................................................54
POL LIMITS ......................................................................................................................54
ANT AZ/EL, ANT POL.......................................................................................................55
AZ/EL COUNT ..................................................................................................................55
SLOW SPEED ..................................................................................................................55
AUTOPOL CFG ................................................................................................................55
COMM PORT....................................................................................................................55
POL OPTIONS..................................................................................................................55
AZ/EL OPTIONS...............................................................................................................55
6.2 OPERATIONAL TROUBLESHOOTING TIPS ...............................................................55
Appendix A Expert Access and System Reset Code ..............................................................58
Appendix A1 - Restoring Non-Volatile Memory ........................................................................59
Appendix A2 - Recovering From Unexpected Memory Upsets ................................................61
Appendix C – RS-422 Serial Interface .....................................................................................62
Appendix D - The RCI RS-422 Interface Specification .........................................................64
AppendixE – CONTROL-1500ACommunications Protocol .....................................................................71
APPENDIX G Drive Transfer Function ....................................................................................83
APPENDIX H Electrical Diagrams..........................................................................................84
Drive Board Layout...............................................................................................................84
Processor Board Layout .......................................................................................................85
Comm Port Wiring Legend ...................................................................................................86
RC1KADP Conversion..........................................................................................................87
RC1KADP Schematic...........................................................................................................88
RC2KPOL Schematic ..........................................................................................................89
RC2KHPP Schematic...........................................................................................................90
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Processor Board Schematic .................................................................................................91
Drive Board Schematic .........................................................................................................92
Declaration of Conformity.........................................................................................................93
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CONTROL-1500A Single Axis Antenna Controller Chapter 1
Chapter 1 INTRODUCTION
TheCONTROL-1500Aantennacontroller controls a single axis satellite antenna.TheCONTROL-1500A
interfaces to 36 volt actuators with single phase, pulse type position sense feedback. Two basicmodels
are available, the CONTROL-1500A and CONTROL-1500B. The CONTROL-1500B can track inclined
orbit satelliteswith either a single axistracking mount or a singleaxisfeed translation system.
The CONTROL-1500B isdescribed in an addendum to thismanual.
Here is a summary of the capabilities of the CONTROL-1500A…
1. The controller utilizes a solid state drive system capable of providing 8 amps to the antenna
actuator. The drive system has built-in over-current sensing with mechanical relay backup
to disconnect the drive from the actuator in the event of a fault.
2. The controller can control polarization via a polarotor (or servo) type interface. The
AUTO_POL feature allows the polarization to be controlled via a digital input or contact
closure supplied by a receiver to the controller. An RC2KPOL option is available to provide
control for a Seavey type two or four port feed with potentiometer feedback. If no
polarization control device will be present in a given installation configure the controller for
the servo option by setting the 24 vdc Rot Feed CONFIG mode item to ‘0’.
3. Position sensing feedback is supplied by a single phase, pulse based sensor - reed switch,
Hall effect, or electro-optical. Single phase reed switch and Hall effect type sensors are
found in 36 volt DC linear actuators. The CONTROL-1500keeps track ofboth rising and falling
pulse edges from the pulse sensor for increased accuracy. The pulse sensors used with
the CONTROL-1500 should not be coupled directlyto the antenna axisof rotation.
4. The CONTROL-1500’s non-volatile memorycan ‘remember’the positions ofa number of
geostationary satellites.
5. The Adapti-Drive variable speed control system allows the user to specify the desired slow
speed for the fundamental axis. The Adapti-Drive system will then adjust the actuator
voltage (via a pulse width modulation scheme) to maintain the speed selected by the user.
This alleviates the problem of poor speed regulation with varying direction along a given
axis associated with constant voltage slow speed systems.
6. The CONTROL-1500 isequipped with an RS-422 communications port. Thisallowsthe controller
to interface with a PC. The communication protocol used iscompatible with the popular
SA-Bus protocol. An optional RS-232 to RS-422 interface converter, designated
RC1KADP, isavailableto convert the RS-232 interface (which isstandard on PC's) over to
the RS-422 interface required for the SA-Bus protocol used on the CONTROL-1500.
1.1 Organization of this Manual
This manual is divided into two broad parts, Installation and Reference. The Installation part of
this manual is designed to familiarize the user with the controller and guide him or her through
the installation and configuration of the controller. The Reference portion of the manual gives
a detailed description of all of the features and capabilities of the controller.
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CONTROL-1500A Single Axis Antenna Controller Chapter 1Introduction 2
The Installation portion of the manual is comprised of Chapters 2 and 3. Chapter 2 explains
the user interface and the basic operation of the unit. Chapter 3 guides the user through the
physical installation and wiring of the unit as well as the initial software configuration.
The Reference portion of this manual is comprised of chapters 4, 5, and 6 as well as the
appendices which follow. These chapters of the manual describe the fields on the screens
which the user will encounter, as well as the data which can be entered at any prompt. After
the initial installation, when the user has become familiar with the operation of the controller,
these chapters will probably be the only ones consulted by the user to handle the routine
chores of adding new satellites and deleting old ones.
1.2 Before You Begin
Please read and understand the manual. Time invested in understanding the installation and
operation of the controller will insure satisfactory results. The unit has been tested thoroughly
and will work accurately and reliably if it is installed and configured properly. There is an old
saying in the controller business - "Garbage in, garbage out".
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CONTROL-1500A Single Axis Antenna Controller Chapter 2Basic Function Description3
Chapter 2 BASIC FUNCTION DESCRIPTION
This chapter describes the controller's front panel layout, user interface and basic operation.
When the user has completed this chapter, he or she should have an understanding of the
various operating modes of the unit, and be able to use the keyboard and liquid crystal display
(LCD) to navigate through those modes.
2.1 Front Panel
Thefront panel (figure 2.1) ofthe CONTROL-1500 contains an ON/OFF switch, a 2 row by 16 column
backlit LCD, and a 4 by 4matrixkeypad with tactilefeedback. The controller’s back panel is
described in chapter 3.
Figure 2.1 CONTROL-1500AFront Panel
The legend above the top row of the LCD defines the POS, POL, and SS fields. The POS field
is the current antenna position. POL defines the polarization field. SS is the signal strength
field. The three character field in the lower right hand corner of the LCD (above the MODE
label) is reserved for the display of the current controller mode. The various modes are
introduced in the following section. If an error condition is active, an error message will
periodically flash across the bottom row of the display. Error messages are discussed in
chapter 6. Chapter 4 explains the contents of every field on the display for all of the various
controller modes.
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CONTROL-1500A Single Axis Antenna Controller Chapter 2Basic Function Description4
Figure 2.2 CONTROL-1500 Keypad
An examination of the keyboard in figure 2.2 reveals that many of the keys have two or more
labels. The function of each key is determined by the current operational mode of the
controller. The various modes are discussed in the following section.
MODE
Toggling this key allows the user to set the desired mode of the controller. There are
two mode groups – operational and programming. See section 2.2 – Changing Modes
with the Mode Key. The MODE key is always active.
SCROLL UP/SCROLL DOWN
These keys are used to scroll up or down through a list of items.
YES/NO
These keys are used to supply an answer to a yes or no question.
ENTER
This key is used to select an entry from a list, terminate a prompt for some action by the
user, or to complete the entry of numeric data.
0-9/DECIMAL POINT (with the stop key)/BKSP/+/-
These keys are used for numeric entry. The BKSP key causes the cursor to move one
column to the left writing over the character which was there. During the entry of
numeric data, if the cursor is in the first position of the data entry field, hitting the +/- key
will toggle the sign of the numeric input.
SPEED
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CONTROL-1500A Single Axis Antenna Controller Chapter 2Basic Function Description5
This key toggles the antenna speed from FAST to SLOW and vice versa.
ARROW KEYS - 2/4/6/8
These keys are used to manually jog the antenna in some modes. The left and down
arrow keys jog the antenna one direction while the right and up arrow keys jog the
antenna in the other direction.
CCW/CW/H/V
These keys control the Polarization. The CCW and CW keys skew the polarization
control device counterclockwise and clockwise. The H and V keys are used to either
select or specify the polarization position associated with a given satellite.
Note that all of these keys are not active simultaneously. The function of each key is
dependent on the current mode of the controller. In some modes certain keys are ignored.
2.2 Changing Modes with the MODE Key
The user can switch the current controller mode with the MODE key. The MODE key is always
active - when the MODE key is depressed and released, the controller's current mode will
change.
There are two mode groups – Operational and Programming.
Operational modes consist of MAN (manual mode), AUT (auto mode), and REM (remote
mode).
Programming modes consist of SET (setup mode), LIM (limits), CFG (config), DEL (delete),
FIX (resync mode), RST (reset mode).
The Operational modes are the ones used in everyday operation of the controller.
To switch between modes in a group, press the MODE key and release. The new mode will
display in the upper right hand corner of the display. To switch to the other group of modes,
hold the MODE key in for five seconds and release. This scheme was designed to help keep
inexperienced personnel from inadvertently changing any of the programmed parameters
specified during system setup. It is also recommended that Expert Access be used to
safeguard the integrity of the data (see section 2.5).
2.3 Mode Descriptions
Themode system on the control-1500 antenna controller resembles the menu system used with
many personal computer (PC) programs. On a PC program a menu system allows the user to
perform operations or to enter in data. The user must navigate through the menu structure to
the particular menu which allows access to the function or data that the user wishes to
manipulate. On the control-1500, themode which iscurrentlyactive isalwaysdisplayed in the
lower right hand corner of the LCD. Here is a summary of the modes implemented on the
control-1500A.
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CONTROL-1500A Single Axis Antenna Controller Chapter 2Basic Function Description6
MANUAL
POS POL SS
1673 50 H 247
GALAXY 6 F MAN
MODE
In manual mode you can:
1. Jog the antenna about the fundamental control axis using the ARROW KEYS
2. Toggle the speed from fast to slow (and vice versa) with the SPEED key.
3. Jog the polarization with the CCW/CW keys.
4. Use the H/V keys to toggle between the preset H and V polarizations of the satellite which
was the last target of an AUTO move.
When MANUAL mode is active the following information is displayed on the top row of the
LCD: antenna position, polarization position, polarization position code (H or V) and the
current signal strength. The signal strength is derived from a receiver or modem automatic
gain control (AGC) output or a dedicated beacon receiver.
The bottom row of the LCD displays the satellite name and the antenna speed (‘F’ for fast, ‘S’
for slow). While jogging the antenna at slow speed a symbol is displayed to the right of the ‘S’
banner. The symbols displayed are … \, |, /, -, \, ., and + and a function of the voltage applied
to the drive.
TheCONTROL-1500 employs a software servo system tomaintain a constant rate ofslow speed
movement. The user specifies a slow speed via the Slow Speed CONFIG mode item. As the
antenna moves at slow speed the controller determines the antenna speed by measuring the
time interval between successive position pulses. The voltage applied to the drive is adjusted
to maintain a constant antenna speed. As the voltage applied to the drive increases the \, |, /,
and – symbols appear to rotate clockwise. Similarly, as the voltage ramps down the symbols
appear to rotate counter-clockwise. The . symbol is displayed when the minimum voltage is
applied to the drive and the + symbol is displayed when the maximum voltage is applied to the
drive.
AUTO
POS POL SS
SELECT SAT
GALAXY6 AUT
MODE
This mode allows the user to automatically position the antenna on any satellite that has been
programmed into memory via SETUP mode. The list of programmed satellites is reviewed via
the SCROLL UP/DOWN keys, and the ENTER key initiates the automatic move. The STOP
key will terminate the move. After the automatic move, MANAUL mode will become active.
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CONTROL-1500A Single Axis Antenna Controller Chapter 2Basic Function Description7
REMOTE
POS POL SS
1673 50 H 247
GALAXY6 REM
MODE
In this mode the controller receives and acts on commands received via the communications
port. This mode can only receive control if enabled via the Remote Enable CONFIG mode
item. The only key which is active is the MODE key, which can be used to switch to a different
mode.
SETUP
POS POL SS
761 74 H 132
TELSTAR302 F SET
MODE
SETUP mode allows the user to store satellite position and horizontal/vertical polarization
values into the controller's non-volatile memory. Once stored in memory, the satellite is
available for recall by AUTO mode.
Here is how a satellite is programmed into memory from SETUP mode.
1. The user peaks the antenna up on the desired satellite.
2. The SCROLL keys are used to scroll through a list of satellite names stored in the
controller's EPROM memory. Hit the ENTER key to select the satellite name. If the user
wishes to assign a name which is not stored in the satellite's EPROM memory, the USER
can manually enter the name. See section xx for details.
3. The user is then prompted to specify the jH and V polarization values for the satellite by
jogging the polarization to those positions. If the antenna does not employ motorized
polarization adjustment the user must still specify the H and V polarization values to the
controller. For this case, the 24 VDC Rot Feed CONFIG mode item should be set to No to
indicate to the controller that a 3 wire servo type polarization control system is present. A
servo polarization device does not provide feedback to the controller. When the controller
is configured for servo based polarization control, when specifying the satellite horizontal
and vertical polarization positions at the H and V prompts make sure that the polarization
position is not at the CW or CCW limit.
4. When the user has entered in all of the requested data, the controller will respond with
"DATA ACCEPTED". SETUP mode remains active, user can repeat the procedure with
another satellite.
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CONTROL-1500A Single Axis Antenna Controller Chapter 2Basic Function Description8
e
RESET
POS POL SS
JAMMED
A/E-1: RST
MODE
This mode allows the user to examine the error status of the motor drive circuits and reset
them if a fault has occurred. The status of the antenna drive is displayed on the top line below
the ‘POS’ banner and the status of the polarization drive is displayed below the ‘POL’ banner.
Polarization errors will only be shown if a rotating feed is present (the 24 vdc Rot Feed
CONFIG mode item is set to Yes).
A DRIVE error indicates that the drive circuits detected an over current fault and shut down. A
JAMMED error indicates that the antenna actuators were commanded to move but no
movement was detected. A RUNAWAY error indicates that antenna movement was detected
when the actuators were not energized. A SENSOR error indicates backwards movement of
the polarization position sense potentiometer. Any antenna drive error condition can be reset
by pressing the key designated on the bottom line of the display. Errors are covered in chapter
6.
DELETE
POS POL SS
SELECT SAT
GALAXY6 DEL
MODE
This mode allows the user to delete satellites from non-volatile memory. The SCROLL
UP/DOWN and ENTER keys are active.
RE-SYNC
POS POL SS
SELECT SAT
GALAXY6 FIX
MODE
The antenna position can be corrupted by any number of causes (sensor failure, lightning
strike, faulty shield connection, etc). If there is an error in the position counts, the controller
cannot properly position itself on the satellites stored in non-volatile memory, and the limits are
not valid. In this situation, it is necessary to re-synchronize the controller's internal position
count.
To resynch the antenna, the operator positions the antenna on a known satellite which has
previously been stored in the controller's non-volatile memory (preferably a Ku band satellite,
since the beamwidth of the antenna is narrower at Ku band than at C band). The user then
activates RE-SYNC mode, and uses the SCROLL UP/DOWN keys to select the satellite name
with which the antenna is currently aligned. When the ENTER key is hit, the controller's
internal antenna position count register is initialized to the position associated with the satellite
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CONTROL-1500A Single Axis Antenna Controller Chapter 2Basic Function Descriptions
selected from non-volatile memory. A single resynch will realign all satellites stored in non-
volatile memory.
CONFIG
POS POL SS
AUTOPOL ENABLE:*
0-NO, 1-yes CFG
MODE
This mode allows the user to view and enter configuration data into the controller. This data is
stored in non-volatile memory and is used to set certain parameters and enable or disable
various controller options. The following parameters and options are controlled or configured
via data entered into the controller from CONFIG mode:
AutoPol
Remote communication port parameters
Slow Speed control parameter
Polarization control options
Drive system automatic move parameters
In CONFIG mode, the SCROLL UP/DOWN keys are used to select the parameter to be
viewed or modified. Asterisks (‘***’) in data entry field implies that the present value of the
CONFIG item is invalid. The CONFIG mode item can be modified using the numeric keypad to
key in a new value. For the value to be accepted the entry must be terminated by the hitting
ENTER key. The prompt message on the bottom row of the display provides data entry
instructions. For some CONFIG mode items, one of the two possible data values is displayed
in lower case text. For these items the upper case prompt specifies the default value of the
parameter.
LIMITS
POS POL SS
705 24 431
7 - SET CCW LIM
MODE
This mode allows the user to set the antenna’s logical limits. To set a logical limit the user jogs
the antenna to the position of the desired limit and hits the 7 key. The azimuth CCW limit (as
seen by an observer above the antenna) is set first. After this limit is set the user is prompted
to set the azimuth CW limit. Once the limits are set the antenna cannot be moved (except in
LIMITS mode) to a position that is not within the logical limits. In LIMITS mode the controller
will not detect an antenna jammed condition. When the first limit is set the antenna position is
initialized to 30.
More detailed information is available concerning each of the modes described above in
Chapter 4 of this manual.
2.4 Mode Access
Access to some modes is restricted in some circumstances. Here are the conditions which
can restrict access to certain modes:
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CONTROL-1500A Single Axis Antenna Controller Chapter 2Basic Function Description
1. REMOTE mode is only accessible when the Remote Mode Enable CONFIG mode item is
set to 1. When enabled, REMOTE mode can be activated either via the MODE key or by
the receipt of a command on the serial port. Note that most commands received via the
serial port may be processed while TRACK mode is active.
2. The expert access system can restrict access to certain modes. The intent is to avoid
corruption of the operating parameters by inexperienced personnel. The expert access
system is described in the next section.
2.5 Expert Access
An Expert Access flag is maintained by the controller. The user can inspect and change the
state of this flag via the Expert On CONFIG mode item. When the flag is set (Expert On
CONFIG item has a value of 1) the user has access to all controller modes (subject to the state
of the Remote Enable CONFIG mode item). When the Expert Access flag is reset (Expert
Access CONFIG item has a value of 0), the user only has access to the MANUAL, AUTO,
REMOTE, RESET, and CONFIG modes.
The Expert Access flag also controls access to CONFIG mode items. When the flag is reset,
the user only has access to the Autopol Enable, Remote Enable, and Expert On CONFIG
mode items. The user can toggle the state of the Expert Access flag by entering a 5 digit code
at the CONFIG mode Expert On CONFIG item. This 5 digit code is contained in appendix A
of this manual. Note that the Expert Access flag is set whenever the controller's memory is
cleared via the Reset Sys CONFIG mode item.
2.6 AutoPol
The AutoPol featureslaves the control1500’s polarization control to a digital output derived froma
satellite receiver. Thecontrol-1500’s AutoPol inputaccessible via connector J1 onthe back of the
unit. Whenthe controller isoperating in MANUAL or REMOTEmodes, thisinput ismonitored
and the polarization control device iscontrolled according to a digital level present at thisinput.
To configure the controller for AutoPol operation, the user must have:
1. a suitable output available on the satellite receiver which is connected properly to the
AutoPol input ofthe CONTROL-1500 (AutoPol input and Return connections are required),
2. the polarity of the AutoPol input must be specified (Autopol Level CONFIG mode item), and
3. the AutoPol feature must be enabled (Autopol Enable CONFIG mode item).
When the polarity of the AutoPol input is specified, the user is informing the controller that a
given AutoPol input level (high or low) corresponds to vertical polarization. Configuring the
AutoPol system during installation is covered in more detail in chapter 3, and the CONFIG
mode prompts which enable and specify the polarity of the AutoPol input are described in
Chapter 4 in the CONFIG mode section.
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CONTROL-1500A Single Axis Antenna Controller Chapter 3Installation/Setup11
Chapter 3 INSTALLATION/SETUP
This chapter guides the installer through the mechanical and electrical installation of the
controller as well as initial software setup.
This chapter describes the electrical connectors on the back panel of the controller, cabling
requirements, installation of optional polarization control devices, antenna limits, and
configuration of the antenna slow speed system.
3.1 Before You Begin
Before installing the unit the installer must ensure that the controller’s line voltage setting is
correct, the controller's memory has been cleared, and that he or she is familiar enough with
the mode system described in Chapter 2 to place the controller in any desired mode.
The CONTROL-1500 can be configured to operate on either 115 VAC or 230 VAC.The AC line
input voltage the unit iscurrentlyconfigured for isdisplayed ina window located in thefuse holder
that is built into the IEC power entry module on the back panel of the controller. To change the
AC input voltage selection, remove the fuse holder and reverse the jumper assembly (on which
the ‘115’ and ‘230’ labels are located). The fuse holder is designed to accommodate 1/4” by 1
1/4” fuses. The CONTROL-1500 uses a5 ampslow blow type fuse. Bussman MDA-5 OR
Littlefuse type 3AB series 326, p/n 326 005.
When the AC line voltage has been verified, before the controller is interfaced to the antenna
the installer should become familiar with the controller's user interface. It is not necessary to
understand every aspect of the controller's operation to install the unit, but the installer should
befamiliar with themodestructure of the CONTROL-1500andbeable to use theMODE keyto
place the controller inany ofthe modes described in Chapter 2.
After the AC line voltage is verified and the user has become acquainted with controller’s user
interface the unit may be powered up. When the unit is powered up, it should be verified that
the controller goes to LIMITS mode ('LIM' displayed in the lower right hand corner of the LCD).
Before the controller is shipped from the factory, the memory is cleared and the controller’s
logical limits are invalidated. Whenever the unit is powered up and the limits are invalid, the
controller automatically places itself in LIMITS mode. Note that there may also be a limits
alarm message flashing on the bottom row of the display.
If the unit does not power up in LIMITS mode the installer should perform a system reset to
place the controller into a known state before proceeding with the installation.
To perform a system reset:
1. Use the MODE key to place the controller into CONFIG mode ('CFG' displayed in the lower
right hand corner of the LCD).
2. Use the SCROLL keys to bring up the Reset Sys screen. If the Reset Sys item does not
appear, the Expert Access flag (see section 2.5) may need to be reset.
To inspect the status of the Expert Access flag, use the SCROLL DOWN key (while still in
CONFIG mode) to bring up the Expert On CONFIG mode item. If a 1 does not appear in
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CONTROL-1500A Single Axis Antenna Controller Chapter 3Installation/Setu
the data entry field, enter the 5 digit code described in section 2.5 to toggle the Expert
Access flag on. This will allow access to the Reset Sys CONFIG mode item.
3. At the Reset Sys screen enter the same 5 digit code followed by the ENTER key.
3.2 Mechanical and Electrical Installation
Use 4 #10-32 mounting screws (included with the controller) to secure the unit to a standard
19" rack. The controller’s back panel is depicted in figure 3.1.
The back panel contains …
1) An IEC AC voltage input module with built-in fuse and line voltage select. Fusing
requirements and line voltage selection is described in section 3.1.
2) A removable, clamp style, 11 position connector (designated J1) that interfaces to …
a) the antenna actuator position sense lines (antenna position sense connections are
described later in this section),
b) the analog receiver, modem or beacon receiver analog output voltage that is proportional
to antenna received signal strength (interface described in section 4.x),
c) the Autopol input (section xx),
d) and the Polarotor 3 wire servo polarization control device (section xx). Please refer to
section xx even if your system does not support polarization control.
Terminal 1 of connector J1 is labeled.
3) A removable, clamp style, 6 position connector (designated J2) to interface to the antenna
drive motor. The antenna actuator interface is described in this section. Terminal 1 of
connector J2 is labeled.
4) A DB-9 female connector (J3) for the SA-Bus compatible remote control interface.
Interfacing to the CONTROL-1500’s remote control connector isdescribed in theappendices.
5) Optional – A removable, clamp style, 5 position connector (designated J4) that interfaces to
a rotating feed powered by a DC motor that employs a potentiometer for position feedback.
This connector will only be present if the RC2KPOL option is installed in the controller. The
RC2KPOL option is described in section xx. Terminal 1 of connector J4 is labeled.
6) Four potentiometers labeled AGC1 Gain, AGC1 Offset, AGC2 Gain, and AGC2 Offset. The
adjustment of these potentiometers is described in section xx.
7) A circuit breaker to protect the antenna drive. When a circuit breaker of this type trips, it
will protrude from its mounting bezel. To reset a circuit breaker, turn the power switch off,
wait a few minutes for the circuit breaker to cool down, then depress the breaker so that it
latches and is even with the bezel.
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CONTROL-1500A Single Axis Antenna Controller Chapter 3Installation/Setup 13
3.2.1 Antenna Motor Drive
The antenna actuator motor drive is interfaced to the controller via the connector J2, terminals
4 and 6, labeled AZ1 and AZ2, respectively. Do not make any connections to the connector J2
terminals labeled EL1 and EL2.
The conductors that interface the controller to the antenna actuator must be sized
appropriately so that sufficient voltage is supplied to the motors. The voltage supplied to the
motors will be the output voltage from the controller less the voltage drop caused by the
resistance of the wires.
The output voltage of the controller is a function of the current supplied to the motors. The
voltage drop in the wires connecting the controller to the antenna is determined by the wire
size, the wire length, and the current supplied to the motors.
Figure xx in the back of this manual shows the relationship between the controller output
voltage and load current.
The following tables show the separation between the controller and the antenna which will
result in 28 and 22 volts being applied to the antenna drive motors as a function of motor
current and wire gauge. The tables take into account the controller output loading and
resistive losses in the conductors.
Separation (in feet) between controller and antenna which will result in 28 volts being applied
to the motors:
Wire Size →
Motor Current ↓
16 AWG 14 AWG 12 AWG 10 AWG
2 amps 600 950 1500 2410
3 amps 340 520 830 1350
4 amps 220 340 550 880
6 amps 90 140 230 340
8 amps 30 40 70 120
Separation (in feet) between controller and antenna which will result in 22 volts being applied
to the motors:
Wire Size →
Motor Current ↓
16 AWG 14 AWG 12 AWG 10 AWG
2 amps 970 1530 2430 3930
3 amps 580 920 1460 2370
4 amps 400 640 1020 1650
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