CG-1220
REV V
JUNE 2013
OPERATION AND MAINTENANCE MANUAL
FOR THE
DIGITAL TRACKING RECEIVER
EXPORT CONTROL WARNING - the disclosure of this
document or its contents to non-U.S. persons, or the
transmission of its contents outside the United States must
be in compliance with U.S. Export Laws and Regulations.
The bearer of this document is under obligation to know the
applicable restrictions for the dissemination of its contents
that relate to U.S. Export Laws and Regulations or any other
U.S. government approvals.
3750 W. Loop 281
Longview, Texas 75604
Revision History
V- Section 1.1.2 L. Shirey C. Bolton 6/7/13 13359
U- Section 4.2.1 & 4.2.5.3 L. Shirey C. Bolton 5/21/13 13339
T – CPU FIRMWARE V2.3 filters
S – Revised Section 3.3.1.1.2 D. Cunningham D. Harrison 2/9/12 11356
R – Updates for CE Certification B. Tanner S. Martinez 1/10/12 11147
P – Correction to FIFO Test (4.2.7) B. Tanner D. Harrison 9/16/10 10150
N – Battery Maintenance Updates B. Tanner D. Harrison 8/4/09 8937
M – SPDTx4 status changes B. Tanner C. Bolton 10-13-08 8195
L – Amended Detection Description A. Weaver D. Weis 7-1-08 8008
K – I/O Status updated M. Neely G. Branch 4-25-06 6629
J – Freq expanded to 945-2055 M. Neely G. Branch 2-06-06 6456
H – STUV freq. digits added M. Neely G. Branch 11-4-05 6183
G – ECW & Diversion Stmt M. Neely G. Branch 3-22-05 5718
F – Sig. Update, ATTN, etc. M. Neely G. Branch 10-18-04 5468
E – For v1.19.13 M. Neely G. Branch 7-21-04 5355
D – 201800 Update M. Neely G Branch 4-30-04 5192
C – 4 Port Option M. Neely G. Branch 10-10-03 4832
B – Misc. M. Neely D. Bulgrien 9-25-01 --A – First major release M. Neely D. Bulgrien 7-10-00 --Initial release M. Neely K. Cone 1-26-00 ---
Rev. No/change Revised By Approved By Date ECO#
B. Tanner D. Bulgrien 6/6/12 11559
ii
NOTICES
WARNING
THE ELECTRICAL CURRENTS AND VOLTAGES IN THIS EQUIPMENT ARE DANGEROUS. PERSONNEL
MUST OBSERVE SAFETY REGULATIONS AT ALL TIMES.
This manual is intended as a general guide for trained and qualified personnel who are aware of the
dangers of handling potentially hazardous electrical and electronic circuits. This manual is not intended
to contain a complete statement of all safety precautions that should be observed by personnel in
using this or other electronic equipment.
WARNING
IN CASE OF EMERGENCY BE SURE THAT POWER IS DISCONNECTED.
The manufacturer has attempted to detail in this manual all areas of possible danger to personnel in
connection with the use of this equipment. Personnel should use caution when installing, operating,
and servicing this equipment. Care should be taken to avoid electrical shock, whether the hazard is
caused by design or malfunction.
WARNING
ALWAYS DISCONNECT POWER BEFORE OPENING COVERS, ENCLOSURES, PANELS, OR SHIELDS.
ALWAYS USE GROUNDING STICKS AND SHORT OUT HIGH VOLTAGE POINTS BEFORE SERVICING.
NEVER MAKE INTERNAL ADJUSTMENTS OR PERFORM MAINTENANCE OR SERVICE WHEN ALONE
OR FATIGUED.
The manufacturer is specifically not liable for any damage or injury arising from improper procedures
or failure to follow the instructions contained in this manual or failure to exercise due care and caution
in the installation, operation, and service of this equipment or use by improperly trained or
inexperienced personnel performing such tasks. During installation and operation of this equipment,
local building codes and fire protection standards must be observed.
All computer software, technical data, or other information pertaining to the equipment covered by this
manual is proprietary to General Dynamics SATCOM Technologies (GDST). Such information is
transmitted in this manual or related documents for the benefit of GDST customers and is not to be
disclosed to other parties verbally or in writing without prior written approval of GDST. Additionally,
this manual may not be reproduced in whole or in part without written consent from GDST.
© 2009 – 2012 General Dynamics SATCOM Technologies
PROPRIETARY NOTICE
iii
Declaration of Conformity
The Digital Tracking Receiver (200800/201800/201046/201700)
was tested to the following sp ecific at ions and found to be in compliance
with the required criteria on the indicated test date.
In accordance with the following directives:
72/23/EEC
89/336/EEC
1999/5/EC
It has been designed and manufactured to the following specifications:
I hereby declare that the equipment named above, when installed according to manufacturer’s
instructions, complies with the above directives and standards.
Signed: Date: April 29, 2004
General Dynamics SATCOM Technologies
Telephone: (903) 295-1480 Fax: (903) 295-1479
The Low Voltage Directive
and its amending directives.
The Electromagnetic Compatibility Directive
and its amending directives.
R&TTE Directive
and its amending directives.
IEC 61010-1:1990+A1:1992+A2:1995
EN 300339: 1998
EN 55022: 1998, Class B
EN 61000-4-2: 1995
EN 61000-4-3: 1995
EN 61000-4-4: 1995
EN 61000-4-5: 1995
EN 61000-4-6: 1996
EN 61000-4-11: 1994
3750 W. Loop 281
Longview, TX 75604
iv
PREFACE
About This Manual
This manual is intended for anyone who uses the General Dynamics SATCOM
Technologies Digital Tracking Receiver (DTR). First time users as well as
experienced operators will find necessary information about features, installation
and operation of the DTR.
This manual contains only the information related to the DTR, and does not include
information about the antenna structure, the equipment used for positioning the
antenna, and other equipment peripheral to the DTR.
This manual is divided into the following sections:
Section 1.0, Introduction, Identifies standard and optional features of the DTR,
and briefly outlines the components of its front and rear panels.
Section 2.0, Theory, explains the theory of operation of the DTR.
Section 3.0, Installation, outlines installation, pin-outs, setup and initial power-
up of the DTR.
Section 4.0, Operation, describes the operation of the DTR, including menu
structure, navigation and other functional details.
Section 5.0, Maintenance, provides information necessary for maintaining the
DTR.
Section 6.0, Engineering Drawings, contains the engineering drawings.
Appendix A, Technical Support, provides the user with contact information for
customer support.
Appendix B, Menu Tree, contains a complete visual representation of the menu
hierarchy.
Appendix C, Remote M&C Protocol, contains commands necessary for remote
communication with the DTR.
Appendix D, Acronyms and Abbreviations, lists the definitions of all acronyms
and abbreviations used in this manual.
v
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vi
TABLE OF CONTENTS
1.0 ................................................................................. 1-1INTRODUCTION
1.1 ............. 1-1General Information Regarding the Digital Tracking Receiver
1.1.1 ............................................................. 1-1Explanation of Safety Symbols
.............................................. 1-1Technical & Environmental Specifications
1.1.2
....................................................................... 1-2DTR Standard Features
1.1.3
........................................................................ 1-2DTR Optional Features
1.1.4
1.2 ................................................................ 1-3Controls and Indicators
...................................................................... 1-4Inputs and Outputs
1.3
1.4
..........................................................................1-5Model Numbers
2.0 ........................................................................................... 2-1THEORY
2.1 ................................................................... 2-1Standard L-band DTR
2.2 ................................................................ 2-2Optional Configurations
2.2.1 ......................................................................... 2-2Dual Polarization Input
................................................................ 2-2Down Converter Frequencies
2.2.2
Table of Contents
3.0 ..................................................... 3-1INSTALLATION AND INITIAL SETUP
3.1 ................................................................................ 3-1Introduction
3.2 ................................................................. 3-1Mechanical Installation
3.3 ...................................................... 3-2Input and Output Connections
3.3.1 .............................................. 3-3Input/Output Interface Connector Pin-Out
3.3.1.1
3.3.1.2 .............................................................. 3-7Monopulse Option
.......................................................... 3-3Default Configuration
3.3.1.1.1 ...................................3-4Analog Output Voltage Pin-Out
3.3.1.1.2
3.3.1.1.3
3.3.1.1.4
3.3.1.1.5
3.3.1.1.6
3.3.1.2.1 ................3-8Degree Command Control (GPIO 0-1, 10-15)
3.3.1.2.2
3.3.1.2.3
...............................................3-4Summary Fault Output
.................................3-5Beacon Select Inputs (GPIO 0-3)
...................................................3-6General Purpose I/O
....3-6External Pol Select Control Lines (GPIO 6-7, 4-5, 8-9)
...........................................................3-6Signal Ground
...............................................3-8Mute Control (GPIO 2)
.............................................3-8Mute Status (GPIO 8-9)
3.4 ......................................... 3-9Serial Interface Hardware Configuration
3.5 .......................................................... 3-11Initial Setup and Power-up
3.5.1 ................................................... 3-12Analog Voltage Output (DAC) Setup
....................................... 3-12Setting up Beacons for 7134 Remote Control
3.5.2
................................... 3-13Controlling DTR with 72XX ACUs via Serial port
3.5.3
...................................................................................... 3-14ACU Setup
3.5.4
4.0 ...................................................................................... 4-1OPERATION
......................................... 4-3Understanding the DTR Menu Structure
4.1
4.1.1 .......................................................................... 4-3Selecting Menu Items
............................................ 4-3What Happens When a Menu is Selected…
4.1.2
4.1.2.1
4.1.2.2
4.1.2.3
............................................................. 4-3Selects a Submenu
....................................................... 4-3Opens an Editor Screen
............................................................. 4-4Executes an Action
4.2 ........................................................................4-5Main Menu Items
4.2.1 ...................................................................................... 4-5FREQUENCY
.................................................................................... 4-5INPUT ATTEN
4.2.2
vii
Table of Contents
4.2.3 ...................................................................................... 4-6POL SELECT
4.2.3.1
.................................................................................. 4-6STATUS MENU
4.2.4
..................................................................... 4-9CONFIGURATION MENU
4.2.5
4.2.5.1
4.2.5.2
4.2.5.3
4.2.5.4
4.2.5.5
4.2.5.6
4.2.5.6
.................................................................. 4-17ACKNOWLEDGE FAULTS
4.2.6
............................................................................................ 4-18TESTS
4.2.7
.................................... 4-6POL SELECT (Multi Port Option Only)
......................................................... 4-9COMM PARAMETERS
...................................................... 4-11RECEIVER OPERATION
..................................................... 4-13CONVERSION BANDS*
............................................................. 4-14BEACON SETUP*
................................................................. 4-14MONOPULSE*
........................................................... 4-16SYSTEM MEMORY
....................................................... 4-17INTERFACE OPTIONS
5.0 .................................................................................. 5-1MAINTENANCE
5.1 .......................................... 5-1Inspection and Preventive Maintenance
Checking the Battery........................................................................... 5-1
Replacing the Battery .......................................................................... 5-1
5.2 ...........................................................................5-3System Spares
6.0 .................................................................. 6-1ENGINEERING DRAWINGS
APPENDIX A - TECHNICAL SUPPORT ..........................................................A-1
APPENDIX B – MENU TREE ........................................................................ B-1
APPENDIX C – REMOTE M&C PROTOCOL....................................................C-1
APPENDIX D – ACRONYMS & ABBREVIATIONS ...........................................D-1
viii
Table of Contents
LIST OF FIGURES
Figure 1-1 .................................................................. 1-3DTR Front Panel
Figure 1-2 ...................................................................1-4DTR Rear Panel
Figure 2-1 ............................................................. 2-1DTR Block Diagram
Figure 3-1 ................................................ 3-2L-Band DTR-I/O Connections
Figure 3-2 ................................................ 3-11Typical Operational Display
Figure 4-1 ................................................. 4-1DTR Controls and Indicators
Figure 4-2
Figure 4-3
............................................. 4-2Receiver Status Display Screen
.................................................................. 4-6Spectral Display
LIST OF TABLES
TABLE 1-1 ............................................. 1-3CONTROLS AND INDICATORS
TABLE 1-2 ....................................................... 1-4INPUTS AND OUTPUTS
TABLE 1-3 ............................................ 1-5DTR Model Number Designation
TABLE 1-4 ............................................ 1-5Frequency Range Chart for DTR
TABLE 3-1 .................................... 3-3DESCRIPTION OF I/O CONNECTIONS
TABLE 3-2 ............ 3-4I/O INTERFACE 1, STANDARD & WIDEBAND CONFIG.
TABLE 3-3 ............ 3-4I/O INTERFACE 2, STANDARD & WIDEBAND CONFIG.
TABLE 3-4 .............................. 3-7I/O INTERFACE 1, MONOPULSE CONFIG.
TABLE 3-5 .............................. 3-7I/O INTERFACE 2, MONOPULSE CONFIG.
TABLE 3-6 ........... 3-9DEFAULT SERIAL INTERFACE SETTINGS (PORTS 1&2)
TABLE 3-7 ................... 3-9SERIAL INTERFACE PORT #1 PIN-OUTS (RS-232)
TABLE 3-8 ............ 3-9SERIAL INTERFACE PORT #2 PIN-OUTS (RS-232/422)
TABLE 3-9
TABLE 3-10
TABLE 3-11 DTR TO 7200 ACU SERIAL CONNE
TABLE 3-12a ................................ 3-13RS-232 CONNECTIONS TO 7200 ACU
TABLE 3-12b ................................ 3-13RS-422 CONNECTIONS TO 7200 ACU
TABLE 3-12c ................................ 3-13RS-422 CONNECTIONS TO 7200 ACU
TABLE 3-13
TABLE 4-1
TABLE 4-2
TABLE 5-1
............... 3-10DEFAULT SERIAL INTERFACE SETTINGS (PORT 3)
................. 3-10SERIAL INTERFACE PORT #3 PIN-OUTS (RS-485)
CTIONS MATRIX ............ 3-13
.................................... 3-14EXAMPLE OF COMM PARAMETERS
............................................. 4-1CONTROLS AND INDICATORS
................................................ 4-2RECEIVER STATUS DISPLAY
.................................................................... 5-3SPARE PARTS
ix
Table of Contents
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x
Introduction
1.0 INTRODUCTION
1.1 General Information Regarding the Digital Tracking
Receiver
The DTR, developed for satellite tracking, is a fully synthesized tracking receiver.
The Digital Signal Processor (DSP) based receiver accepts wideband RF inputs,
performs frequency selection, down-converts RF to 70 MHz, and digitally
processes the digital samples.
The DTR’s user interface is powerful and intuitive giving the operator the ability to
custom configure specific applications in a very straight forward manner. The
unit’s versatile settings allow the unit to interface with a wide range of next-level
system components.
1.1.1 Explanation of Safety Symbols
Symbol Explanation
Protective Earth/Ground Terminal
Caution, Risk of Electric Shock
Caution, Risk of Danger.
Consult accompanying documents.
1.1.2 Technical & Environmental Specifications
DTR Dimensions 3.5 in. High (8.9 cm) x 19 in. Wide (48.3 cm) x 22 in. Deep (55.9 cm)
DTR Mass 25 lbs (11.3 kg)
DTR Maximum Power 1 A
DTR Maximum Operating Altitude 6500 ft (2000 m)
Input Power 110-240 VA C, 50-60 Hz,
Operating Temperature & Humidity 0 to 50 C, Up to 90% non-con densi n g humidity
Non-Operating Temperature & Humidity -15 to 50 C, Up to 90% non-condensing humidity
1-1
Introduction
1.1.3 DTR Standard Features
The following are the standard features of the DTR:
Input frequency range of 945 MHz to 2055 MHz for L-band configuration
Wide input signal dynamic range (70 dB Nominal)
Sensitivity signal range of –40 dBm to –110 dBm
Minimum C/No better than 35 dB/Hz
Synthesized tuning
Tuning resolution of 1 kHz
Selectable tracking slope
Signal linearity ( .5dB over a 10dB nominal tracking range)
Intelligent signal/side-band recognition
240x64-pixel graphics display
User interface with logically grouped menus
Optimal mix of “dedicated and soft keys” for efficient menu navigation and data
entry
Spin knob for alternate means of tuning and adjusting parameter values
Dedicated online Help key
Remote control capability (RS-232, RS-422, RS-485, contact closures)
Front panel 70 MHz monitor port (50 BNC female)
Real time spectral display of tracking signal
Field upgradeable software
C/No and power measurement information display
Compatibility with TRL series L-band Tracking Receivers, including I/O interface
and serial communications protocol
Selectable input attenuator of 0 – 30 dB in 2 dB steps
Adjustable bandwidth filter options from 16 kHz up to 500 kHz
1.1.4 DTR Optional Features
Input frequency range covering S, C, X, Ku and Ka-band configurations
Up to 6 RF inputs
Dual polarization input
Multi-band switching
Single/dual channel monopulse tracking
Wideband operation
Complete backward compatibility with TRL series L-band Tracking Receivers,
including monopulse interfaces and TBT (Tracking Band Translator) support
Rack Slides
1-2
CG-1220 DTR
Introduction
1.2 Controls and Indicators
The controls and indicators located on the DTR front panel provide the normal
operator interface. The DTR front panel is shown in Figure 1-1 with its controls
and indicators identified. The function of each is detailed in Section 4, Operation.
1 32 4 5 6 7
Figure 1-1 DTR Front Panel
TABLE 1-1 CONTROLS AND INDICATORS
1. Receiver Status Display
2. Soft Keys
3. Navigation Keys
4. Status Indicators
5. Numeric Keypad
6. Spin Knob
7. IF Monitor Port
1-3
Introduction
1.3 Inputs and Outputs
The inputs and outputs located on the DTR rear panel provide the external
interfaces. The number of inputs varies with user configuration. The DTR rear
panel is shown in Figure 1-2. The function of each input and output is listed in
Table 1-2.
4 3 2 1
6 5
Figure 1-2 DTR Rear Panel
TABLE 1-2 INPUTS AND OUTPUTS
CONNECTOR FUNCTION
1. RF Input: Provides up to 6 selectable inputs for RF signals in the following bands:
Type N Connector
Type SMA Connector
2. I/O Interface 1 and 2 Analog Interface and Control ports. Provides analog control and status.
3. RS-232 A standard RS-232 serial port.
4. RS-422 A standard RS-422 serial port. Also configurable as an RS-232 serial port.
5. RS-485 A standard RS-485 serial port.
6. Power Supply Universal power supply accepting 100 – 240 VAC, 50/60 Hz. A fuse is
L-band S-band C-band X-band Ku-band
Ka-band
accessible by pulling out a holder between the switch and the plug. This
holder also contains a spare fuse. The fuse used is a 1A, 250V rated 5mm x
20mm slow-blow snap-in fuse. Littelfuse 239001 or equivalent is
recommended.
1-4
CG-1220 DTR
The power cord to be used with this unit should be a detachable #18AWG
cord meeting at least 1250W/10A. Volex 17251 10 B1 or equivalent is
recommended.
IMPORTANT: The safety grounding bolt below the input should be
securely connected to the rack ground bar (or adequate earth ground) to
eliminate a potential failure hazard.
Introduction
1.4 Model Numbers
The model number of the DTR can be found on the serial/model number tag found
on the side of the unit. For reference, the following tables list possible
configurations.
TABLE 1-3 DTR Model Number Designation
Standard Four-Digit Prefix OPTIONS (Only if Applicable)
Base No.
201800- 1st Digit 2nd Digit 3rd Digit 4th Digit 5th Digit 6th Digit
(Standard)
201700-
(Wideband)
1st
Freq.
See
chart
2nd Freq. 3rd Freq. 4th Freq. Options Options
See chart
below
See chart
below
See chart
below
below
Note: One to four frequency ranges are allowed. The first four digits are entered in ascending order of
frequencies. Zeros are entered for ranges not used.
TABLE 1-4 Frequency Range Chart for DTR
Digit Band
Include Pol Select
Switch
0 None
1 No
2
3 No
4
5 No
6
7 No
8
A No
B
C No
D
E No
F
G No
H
J No
K
L No
M
N No
P
Q No
R
S No
T
U No
V
L – Band
S – Band
C – Band
X – Band
Ku – Low Band
Ku – High Band
C – High Band
Ka-A
Ka-B
Ka-C
Ka-D
Ka-E
Ku Extended
X High
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Examples:
201800 1000 L-Band with single pol input
201800 2000 L-Band with dual pol input
201800 AC00 10 Ku-Low, Ku-High with single pol input and monopulse option
201800 6BD0 00 C, Ku-Low, Ku-High with dual pol input
Blank – No options
0 – None
1 – Monopulse
Freq. Range
Blank – No options
0 – Standard
5 – Special Software
BDC P/N
0.945 – 2.055 GHz None
2.0 – 2.8 GHz BRF108
3.4 – 4.2 GHz BRF107
7.25 – 7.75 GHz BRF110
10.7 – 11.75 GHz BRF111
11.7 – 12.75 GHz BRF112
3.7 – 4.8 GHz BRF109
17.0 – 18.1 GHz BRF121
18.1 – 19.2 GHz BRF122
19.2 – 20.3 GHz BRF123
20.2 – 21.3 GHz BRF124
21.2 – 22.3 GHz BRF125
12.2 – 13.0 GHz BRF105
7.9 – 8.5 GHz BRF120
1-5
Theory
2.0 THEORY
2.1 Standard L-band DTR
The use of advanced DSP techniques coupled with conventional analog radio
techniques provides enhanced flexibility and sensitivity to the DTR.
The L-Band DTR, illustrated by the block diagram in Figure 2-1, takes a RF input
signal in the L-Band frequency range and down-converts the signal to a 70 MHz
Intermediate Frequency (IF) using a super-heterodyne process. The signal is then
routed through an anti-aliasing filter prior to being sampled by a high-speed analog
to digital converter (A/D). This digital data is then passed through a decimating
Finite Impulse Response (FIR) filter, which provides both a sample rate reduction
and a band limiting function.
The DSP chip then transforms the data using a Fast Fourier Transform (FFT) and
analyzes the band for signal and noise content. The signal power and signal to
noise information is estimated and the values are sent to the System Control
Processor (SCP).
The SCP sets and manages module functions and communication with the user
and other equipment via the front panel controls and data interfaces. The SCP also
makes slope adjustments and reports the received signal power level to control
equipment via serial communications.
RF Front-End
PLL Reference(s)
Analog/Customer
Interface I/O
SoftKeys
SCP
Graphics Display
(240x64-pixel)
Keypad
+
Signal of Interest
Control
I/O
Analog to
Digital
Conversion-
MCU
Control
DDS
Frequency
Reference
RS-232 Serial
Ports
RS-422 Serial
Ports
Digitized
Signal
FIR
Filtering
RS-485 Serial
Port
Filtered Signal
Serial Link
Serial Link
Figure 2-1 DTR Block Diagram
DSP
EEPROM
SPU
CPU
Flash
SRAM
IF
Monitor
Port
16-Bit Parallel (DMA)
166X32K
Synchronous
FIFO
Flash
EEPROM
NVRAM
R
CG-1220 DT
2-1
Theory
2.2 Optional Configurations
2.2.1 Dual Polarization Input
Versatile unit configurations allow dual-receive signal polarization to be connected
to separate RF inputs on the DTR’s back panel. Linear polarizations (vertical and
horizontal) and circular polarizations (clockwise and counter clockwise) can be
connected to the DTR without external combining or switching.
2.2.2 Down Converter Frequencies
RF signals enter the DTR on one of six possible inputs and are routed to the proper
Block Down Converter (BDC) for conversion to an L-band signal of 950 MHz to
2050 MHz. Each band accepts an input level of –110 to –40 dBm (decibel
referred to 1 milliwatt).
The output of each block downconverter is connected to appropriate switching and
routed to the input of the L-band downconverter. To prevent unnecessary heat and
noise, the DC power to each BDC is switched so that the BDC is only powered
when its particular band is selected.
2-2
CG-1220 DTR
Installation
3.0 INSTALLATION AND INITIAL SETUP
3.1 Introduction
This section provides the information necessary for the installation and initial setup
of the DTR.
3.2 Mechanical Installation
Using four #10 screws, mount the DTR in a standard 19-inch Electronic Industries
Association (EIA) equipment rack. Rear support and/or rack slides are not usually
necessary; however, rack slides may prove helpful during maintenance operations
and are available as an option.
There is a stud on the rear panel of the DTR that is marked with the protective
earth (ground) symbol. A proper grounding wire from the rack that this piece of
equipment is installed into should be attached to this stud, making sure that the
end of the grounding wire has good metal-to-metal contact with the rear panel of the DTR.
Use the hex nut provided (or similar nut) to secure this grounding wire to the rear panel
stud.
Make sure the area directly behind the fan on the rear panel of the DTR is kept clear once
the equipment is installed in the rack to allow for proper ventilation of the unit.
The DTR should be connected to a grounded AC power outlet using a detachable power
cord.
The main power source supplying power to the rack that the DTR is installed in
should be easily accessible for disconnect should an equipment fault occur.
R
CG-1220 DT
3-1
Installation
3.3 Input and Output Connections
Refer to Figure 3-1 for a diagram showing the possible Input/Output (I/O)
connections to the DTR. Table 3-1 provides brief descriptions of each connection
or group of connections.
Figure 3-1 L-Band DTR-I/O Connections
NOTE: ACU I/O connections shown for reference only. The DTR may
be interfaced with any ACU having contact closures for beacon
selection and a tracking voltage input or a serial link utilizing the DTR’s
M&C command set.
CG-1220 DTR
3-2
Installation
TABLE 3-1 DESCRIPTION OF I/O CONNECTIONS
CONNECTION DESCRIPTION
Line POWER ENTRY
MODULE
RF INPUTS The RF inputs to the DTR are provided through 50 ohm, type N female
I/O INTERFACE The I/O interface provides the classic analog interface for ACU control. There
SERIAL INTERFACE #1 This serial port provides a sophisticated digital control and status interface for
SERIAL INTERFACE #2 This serial port provides a sophisticated digital control and status interface for
For 120 V operation, a standard 3-prong National Electrical Manufacturers
Association (NEMA) plug is provided; for 220/230/240 V operation, the same
power cable assembly is provided, but the customer may be required to install a
more appropriate plug on site. Note that the ground conductor MUST be utilized
with the line power connection.
connectors on the rear panel. The allowable input signal range is -110 decibel
referred to 1 milliwatt (dBm) to -40 dBm. The DTR input Voltage Standing-Wave
Ratio (VSWR) is 1.25:1, nominal. The standard receiver configuration has
INPUT #1 available only. In multiband receivers, lower input numbers
correspond with lower frequencies. For example, in a C and Ku receiver, Inputs
1 & 2 would be C-band and Inputs 3 & 4 would be Ku-band.
are two sets of analog output signals: OUT(+,-) and AUX(+,-). Four contact
lines are provided, as well as a summary fault closure. Additionally, there are
several general-purpose inputs and outputs that can be used to change the
receiver's operational mode. See Tables 3-2 and 3-3 for pin-outs.
advanced ACU and M&C systems. Interface #1 is configured for RS-232 only.
Full remote control of the receiver is realized with this interface. See Table 3-7
for pin-outs.
advanced ACU and M&C systems. Interface #2 is fully configurable for RS-232
or RS-422. Full remote control of the receiver is realized with this interface.
See Table 3-8 for pin-outs.
SERIAL INTERFACE #3 This serial port provides a sophisticated digital control and status interface for
advanced M&C systems. Interface #3 is configured for RS-485 only. Full
remote control of the receiver is realized with this interface. See Table 3-9 for
pin-outs.
3.3.1 Input/Output Interface Connector Pin-Out
The I/O Interface Connector Pin-Out section describes the signals and configuration
of the I/O INTERFACE connectors (25-pin D female subminiature socket).
3.3.1.1 Default Configuration
Table 3-2 and 3-3 describes the pin number, designation and function of the two
I/O ports. The tables show the default configuration only.
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TABLE 3-2 I/O INTERFACE 1, STANDARD & WIDEBAND CONFIG.
PIN NUMBER DESIGNATION FUNCTION
1,14 +OUT, -OUT (DAC#1) Analog Output Voltage #1, Common
2 SHLD_OUT Shield for +/- OUT pair
3,16 +AUX, -AUX (DAC#2) Analog Output Voltage #2, Common
15 SHLD_AUX Shield for +/- AUX pair
4,17 SUM_FLT Summary fault relay contacts.
5,18 GPIO 0, (Beacon 1, Common) Beacon 1 Input
6,19 GPIO 1, (Beacon 2, Common) Beacon 2 Input
7,20 GPIO 2, (Beacon 3, Common) Beacon 3 Input
8,21 GPIO 3, (Beacon 4, Common) Beacon 4 Input
9,22 GPIO 4 (Command, Return) POL 3 select control line (Multi Port Option Only)
10,23 GPIO 5 (Command, Return) POL 4 select control line (Multi Port Option Only)
11,24 GPIO 6, (Command, Return) POL 1 select control line
12,25 GPIO 7, (Command, Return) POL 2 select control line
13 SIG_GND (Reserved signal)
DTR signal ground; THIS IS NOT A SAFETY GROUND POINT
TABLE 3-3 I/O INTERFACE 2, STANDARD & WIDEBAND CONFIG.
PIN NUMBER DESIGNATION FUNCTION
1,14 +OUT, -OUT (DAC#1) Analog Output Voltage #1, Common
2 SHLD_OUT Shield for +/- OUT pair
3,16 +AUX, -AUX (DAC#2) Analog Output Voltage #2, Common
15 SHLD_AUX Shield for +/- AUX pair
4,17 SUM_FLT Summary fault relay contacts.
5,18 GPIO 8 (Command, Return) POL 5 Select Control Line (Multi Port Option Only)
6,19 GPIO 9 (Command, Return) POL 6 Select Control Line (Multi Port Option Only)
7,20 GPIO 10 General purpose I/O
8,21 GPIO 11 General purpose I/O
9,22 GPIO 12 General purpose I/O
10,23 GPIO 13 General purpose I/O
11,24 GPIO 14 General purpose I/O
12,25 GPIO 15 General purpose I/O
13 SIG_GND (Reserved signal)
DTR signal ground; THIS IS NOT A SAFETY GROUND POINT
3.3.1.1.1 Analog Output Voltage Pin-Out
There are two separate analog voltage outputs available; both are capable of
producing +/- 10 VDC. Pins 1, 14 and 2 provide the analog output voltage,
common, and shield connections respectively for DAC # 1. Pins 3, 16 and 15,
respectively, provide an auxiliary analog output for DAC # 2.
3.3.1.1.2 Summary Fault Output
Pins 4 and 17 provide the SUMMARY FAULT relay contact closure in the standard
product model. If any faults occur or DTR supply power is lost, the Summary fault
contact will open. The ACKNOWLEDGE FAULTS menu has the effect of removing
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the highlight from the fault display on the DTR LCD and restoring the Summary Fault
contact to the normal (no-fault) state, which is CLOSED. However it may not clear
the fault condition. If any new faults occur after the Summary fault relay was
forced to close by using ACKNOWLEDGE FAULTS, the Summary Fault relay will
open again to indicate a new fault condition.
The following listing of faults that can cause a Summary Fault in the DTR (also listed
in Appendix C under the 5.1 Keyword Commands, LIST-FAULTS keyword
description):
Low Input Signal
Input Saturated
MCU Link loss
DSP Link loss
DSP Data loss
SPU Overflow
TBT Link loss
TBT Summary Fault
TBT in Local Ctrl
Out of Band
Invalid Band Setup
Band 1 BDC fault
Band 2 BDC fault
Band 3 BDC fault
Band 4 BDC fault
PLL1 Unlocked
PLL2 Unlocked
Temperature alarm
NVRAM corrupted
Mute Switch Fault
SPU Link locked
3.3.1.1.3 Beacon Select Inputs (GPIO 0-3)
The BEACON SELECT inputs (not available on Monopulse units) are formed through
pin groups (5,18), (6,19), (7,20) and (8,21)—internal drive common ground, short
GPIO + to – to turn off optically coupled isolator. GPIO 0-3 are inputs that switch
the DTR to a pre-set BEACON (set of parameters). The main purpose is to provide
a discrete, parallel control interface that is compatible with existing 7134 (and
7200) controllers. Selecting one of the 4 BEACON inputs, while the DTR is in
REMOTE CONTROL (not Local) and the REMOTE CONTROL PORT parameter is set
to I/O Interface #1, will enable the DTR to switch to the pre-set BEACON
parameters.
To setup the beacons, the appropriate DTR parameters should be set, and the
STORE BEACON command executed. (Refer to Section 3.5.2 for further
information about setting up beacons.) This action will store the BEACON
parameters into NVRAM, which may then be recalled from the CONFIGS/BEACON-
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SETUP/RESTORE-BEACONS menu or from the I/O Interface #1 inputs while the
DTR is in REMOTE control.
3.3.1.1.4 General Purpose I/O
GPIO 4, 5, and 8–15 are reserved for future use on the standard product; no
connections should be made to these pins. GPIO 4 – 5 and GPIO 8 - 9 are used for
POL 3 - 4 and POL 5 - 6 select control lines when used with the Multi Port Option
(see Section 3.3.1.1.5).
3.3.1.1.5 External Pol Select Control Lines (GPIO 6-7, 4-5, 8-9)
Pin groups (11,24) and (12,25)–isolated output relays, normally closed--provide
two polarization select control lines for a customer furnished switch (external to
the DTR). The menu item POL SELECT (POL 1, POL 2) controls the two
polarization select control lines on the GPIO 6 and 7 of I/O Interface #1. This was
implemented for backward compatibility with a GDST Model TRL Tracking Receiver
which provided some I/O lines to facilitate control of an external POL Switch,
mounted on the hub with the RF equipment. Notice that these lines are controlled
by the Pol Select item on the DTR main menu.
Pin groups (9,22), (10,23) on I/O interface 1 and (5,18), (6,19) on I/O interface 2
– AVAILABLE WITH MULTI PORT OPTION ONLY. Isolated output relays, normally
closed--provide four additional polarization select control lines for a customer
furnished switch (external to the DTR). The menu item POL SELECT (POL 3, POL
4, POL 5, POL 6) controls the four polarization select control lines on the GPIO 4
and 5 of I/O Interface #1 and GPIO 5 and 6 of I/O interface #2.
3.3.1.1.6 Signal Ground
Pin 13 is reserved for future use on the standard receiver. No connection should be
made to this pin.
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3.3.1.2 Monopulse Option
Table 3-4 and 3-5 describes the pin number, designation and function of the two
I/O ports. The tables show the monopulse option configuration. Connections to
the monopulse tracking plate are described below; refer to the preceding section,
Default Configuration, for pins that are not described here.
TABLE 3-4 I/O INTERFACE 1, MONOPULSE CONFIG.
1,14 +OUT, -OUT (DAC#1) Analog Output Voltage #1, Common
2 SHLD_OUT Shield for +/- OUT pair
3,16 +AUX, -AUX (DAC#2) Analog Output Voltage #2, Common
15 SHLD_AUX Shield for +/- AUX pair
4,17 SUM_FLT Summary fault relay contacts.
5,18 GPIO 0, (90 DEG, return) 90 degree command control
6,19 GPIO 1, (180 DEG, return) 180 degree command control
7,20 GPIO 2, (Mute, return)
8,21 GPIO 3, (FR0 Command, Return) Frequency Band Control (Optional)
9,22 GPIO 4, (FR1 Command, Return)
10,23 GPIO 5, (FR2 Command, Return)
11,24 GPIO 6, (Command, Return) POL 1 select control line
12,25 GPIO 7, (Command, Return) POL 2 select control line
13 SIG_GND (Reserved signal)
1,14 +OUT, -OUT (DAC#1) Analog Output Voltage #1, Common
Phase shifter mute control
Frequency Band Control (Optional)
Frequency Band Control (Optional)
DTR signal ground; THIS IS NOT A SAFETY GROUND POINT
TABLE 3-5 I/O INTERFACE 2, MONOPULSE CONFIG.
PIN NUMBER DESIGNATION FUNCTION
1,14 +OUT, -OUT (DAC#1) Analog Output Voltage #1, Common
2 SHLD_OUT Shield for +/- OUT pair
3,16 +AUX, -AUX (DAC#2) Analog Output Voltage #2, Common
15 SHLD_AUX Shield for +/- AUX pair
4,17 SUM_FLT Summary fault relay contacts.
5,18 GPIO 8 (Mute status, return)
6,19 GPIO 9 (Mute status, return)
7,20 GPIO 10 (1.40625 DEG, return) 1.40625 degree command control
8,21 GPIO 11 (2.8125 DEG, return) 2.8125 degree command control
9,22 GPIO 12 (5.625 DEG, return) 5.625 degree command control
10,23 GPIO 13 (11.25 DEG, return) 11.25 degree command control
11,24 GPIO 14 (22.5 DEG, return) 22.5 degree command control
12,25 GPIO 15 (45 DEG, return) 45 degree command control
13 SIG_GND (Reserved signal)
Mute status (short=on)
Mute status (short=off)
DTR signal ground; THIS IS NOT A SAFETY GROUND POINT
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3.3.1.2.1 Degree Command Control (GPIO 0-1, 10-15)
The phase shifter outputs are formed through I/O Interface #1 pin groups (5,18)
and (6,19) as well as I/O Interface #2 (7,20), (8,21), (9,22), (10,23), (11,24), and
(12,25)—common ground driver IC.
3.3.1.2.2 Mute Control (GPIO 2)
The mute select control line output is formed through I/O Interface #1 pin group
(7,20)--isolated output relay, normally closed. Mute commands the tracking plate
to bypasses the monopulse error channel while allowing the sum channel to pass.
Mute is normally on; when the DTR is commanded to start monopulse, mute is
turned off. It can be set in the MONOPULSE menu.
3.3.1.2.3 Mute Status (GPIO 8-9)
The MUTE STATUS inputs are formed through I/O Interface #2 pin groups (5,18)
and (6,19)—internal drive common ground, short GPIO + to – to turn off optically
coupled isolator. GPIO 8-9 are inputs that the DTR uses to monitor the operation
of the mute switch on the monopulse tracking plate. A fault is set if the switch
fails to operate. NOTE: Some monopulse tracking plates may not have this
functionality. It can be disabled in the MONOPULSE menu.
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3.4 Serial Interface Hardware Configuration
Serial Ports 1 and 2 are factory set to:
TABLE 3-6 DEFAULT SERIAL INTERFACE SETTINGS (PORTS 1&2)
Setting Changes Allowed
19200 bps
Echo enabled
Newline enabled (CR-LF)
Shell = M&C
8 Data bits
No parity
1 stop bit
Port 1 can only be an RS-232 port, while Port 2 may be configured as RS-232 or
RS-422. Note that these two pin outs coexist on the same 9-pin connector
without conflict. Both serial ports are 9-pin D subminiature socket connectors.
Pin-outs for the Serial Interface Ports 1 and 2 are given in Tables 3-7 and 3-8.
TABLE 3-7 SERIAL INTERFACE PORT #1 PIN-OUTS (RS-232)
PIN FUNCTION
1 No Connection
2 RX
3 TX
4 No Connection
5 Signal Ground
6 No Connection
7 No Connection
8 No Connection
9 No Connection
TABLE 3-8 SERIAL INTERFACE PORT #2 PIN-OUTS (RS-232/422)
PIN FUNCTION
RS-232 ONLY RS-422 ONLY
1 No Connection TX+
2 RX (from DCE) No Connection
3 TX (from DTE) No Connection
4 No Connection RX+
5 Signal Ground Signal Ground
6 No Connection TX-
7 Request to send (RTS) (from DTE) No Connection
8 Clear to send (CTS) (from DCE) No Connection
9 No Connection RX -
These parameters can be changed using the following menu:
Configs/Comm Parameters/Port 1 or Port 2
These parameters cannot be changed by the user.
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Serial Port 3 is factory set to:
TABLE 3-9 DEFAULT SERIAL INTERFACE SETTINGS (PORT 3)
Setting Changes Allowed
19200 bps
Shell = M&C
Master Address = 0
Slave Address = 1
Address Offset = 48
8 Data bits
No parity
1 stop bit
These parameters can be changed using the following menu:
Configs/Comm Parameters/Port 3
These parameters cannot be changed by the user.
Port 3 is a half-duplex RS-485 port and is a 9-pin D subminiature socket connector.
Pin-outs for the Serial Interface Port 3 are given in Table 3-10.
TABLE 3-10 SERIAL INTERFACE PORT #3 PIN-OUTS (RS-485)
PIN FUNCTION
1
2
3
4 No Connection
5 No Connection
6 Data - (Half-Duplex)
7 Cable Shield
8 No Connection
9 No Connection
Data + (Half-Duplex)
No Connection
No Connection
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3.5 Initial Setup and Power-up
Detailed operating instructions for the DTR are provided in Section 4.0 of this
manual. The operator should become familiar with the general operating procedures
before continuing.
NOTE: Prior to powering the DTR, observe the incoming beacon signal
using a spectrum analyzer to ensure proper level (-110 dBm to -40 dBm)
and sufficient Carrier to Noise ratio (C/No) (35 dbHz minimum). Also,
make note of the beacon signal frequency. Then connect the RF input(s)
to the appropriate N-Type connectors and proceed with the following
steps.
1. Set the DTR rear panel POWER switch to ON.
2. Verify that the 240x64-pixel graphical receiver status display shows a normal
operational mode. A default frequency and signal acquisition status should be
displayed.
Figure 3-2 Typical Operational Display
3. Set POL SELECT item to the desired input (on multiple port configurations).
4. If necessary, select FREQUENCY and enter the desired frequency by either
rotating the spin knob, or by using the numeric keys to enter the appropriate
frequency.
5. Once signal acquisition occurs, verify that no faults are indicated.
6. For troubleshooting assistance, navigate to STATUS\TROUBLE-SHOOT. This
menu describes what some of the possible error messages mean and how to fix
them.
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3.5.1 Analog Voltage Output (DAC) Setup
1. Tune frequency to obtain desired signal at maximum power level.
2. Use DAC SETUP menu to establish VOLTAGE RANGE, MINIMUM REF POWER
LEVEL, and SLOPE.
DAC1 provides an analog DC voltage, proportional to signal level, on pins 1 and
14 (+OUT, -OUT) of I/O Interface #1 on the back panel.
A. The DC VOLTAGE RANGE of the Digital to Analog Converter (DAC) is set to
the default range of (0 to +10V). For Special uses, the voltage range can
alternatively be set to (-10 to +10V), or (-5 to+5V).
B. The SLOPE defaults to 0.3V/dB. SLOPE controls the rate of change of the DC
output voltage with respect to a 1 dB change in signal power level.
C. The MINIMUM REF POWER LEVEL establishes the power level corresponding
to the minimum DAC voltage. The default is –90 dBm which emulates GDST
“TRL” operation.
3. Check DAC1 output voltage (displayed on the front panel) and adjust MINIMUM
REF POWER LEVEL to obtain 8 VDC.
Note: If both DAC1 and DAC2 are enabled, the front panel display will report DAC1 voltage real-
time (not at specified DAC1 update rate). If DAC1 is disabled and DAC2 is enabled, front display
will report DAC2 voltage real-time; label will change to DAC2=. If DAC1 is enabled and DAC2 is
disabled, front display will report DAC1 voltage real-time. If DAC1 is disabled and DAC2 is
disabled, front display will not report anything (blank field).
3.5.2 Setting up Beacons for 7134 Remote Control
This brief summary outlines steps necessary to establish beacons which can be
accessed via remote control from GDST 7134 ACUs.
1. Set necessary parameters such as FREQUENCY, SLOPE, etc. See Section
4.2.5.4, BEACON SETUP for a complete list of beacon parameters.
2. Execute the STORE BEACON 1-4 menu at CONFIGS\BEACON-SETUP\STORE-
BEACONS. These current settings will be stored in the respective beacon
(BEACON 1-4).
3. Test by recalling BEACON 1-4.
4. The connection to the 7134 is via the I/O Interface #1. (Refer to Table 3-2)
5. To allow the 7134 ACU to select beacons, set CONFIGS\REMOTE CONTROL to
I/O Interface #1.
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