Odetics Telecom GPStarplus 365 User manual
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Odetics Telecom GPStarplus Model 365
365-8006 i
GPStarplus Model 365
GPS Synchronized
Time and Frequency Source
User's Manual
For units configured with Firmware 365-3003
Version X4.00.03, X4.10.02 and Up
Document 365-8006
Revised
July 29, 1999
ALL SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Odetics Telecom
1585 S. Manchester Avenue, Anaheim CA 92802-2907 USA
Phone: (714) 758-0400 (800) 374-4783 Fax: (714) 780-7696
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Odetics Telecom GPStarplus Model 365
365-8006 ii
DISCLAIMER
This document reflects the specifications and features of the equipment that were
current at the time of release of this manual. Odetics disclaims responsibility for any
errors contained herein, and reserves the right to make changes to this manual and
related equipment without notice or obligation.
THIS PRODUCT IS NOT AUTHORIZED FOR USE AS A CRITICAL COMPONENT IN
LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESSED WRITTEN
CONSENT OF THE CHIEF EXECUTIVE OFFICER OF ODETICS.
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Odetics Telecom GPStarplus Model 365
365-8006 iii
Table of Contents
Section 1 General Information
1.1 INTRODUCTION.............................................................................................1-1
1.2 DESCRIPTION................................................................................................1-1
Section 2 Specifications
2.1 GENERAL.......................................................................................................2-1
2.2 OPERATING DETAILS...................................................................................2-1
2.2.1 Operating Mode Definition ...................................................................2-1
Warm Up ...................................................................................................2-1
Cold Start...................................................................................................2-1
Warm Start ................................................................................................2-1
Time Locked..............................................................................................2-2
Coasting ....................................................................................................2-2
Recovering ................................................................................................2-3
Disciplining Period.....................................................................................2-3
2.2.2 Operating Characteristics.....................................................................2-3
2.3 MECHANICAL.................................................................................................2-4
2.4 ENVIRONMENTAL .........................................................................................2-4
2.5 POWER REQUIREMENTS.............................................................................2-5
2.5.1 Power Supply Option -1 (Standard AC Input) ......................................2-5
2.5.2 Power Supply Option -2 (+24 VDC / - 48 VDC Input)...........................2-5
2.5.3 Power Supply Option -3 (120 VDC / 240 VDC Input)...........................2-5
2.6 ANTENNA INTERFACE..................................................................................2-6
2.6.1 Antenna Kit...........................................................................................2-6
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2.7 ELECTRICAL SIGNALS..................................................................................2-7
2.7.1 Reference Frequency Output...............................................................2-7
General Characteristics.............................................................................2-7
Oscillator Option -1 Characteristics (Standard Quartz).............................2-8
Oscillator Option -2 Characteristics (High Performance Quartz)...............2-8
Oscillator Option -3 Characteristics (Rubidium)........................................2-9
2.7.2 1 PPS Output .....................................................................................2-11
2.7.3 Pulse Rate Output..............................................................................2-12
General Characteristics...........................................................................2-12
Pre-Programmed Output Characteristics.................................................2-13
User Programmed Output Characteristics...............................................2-13
2.7.4 Event Trigger Output..........................................................................2-14
2.7.5 Time Tag Input...................................................................................2-15
2.7.6 Time Code Output..............................................................................2-16
Modulated Carrier Output........................................................................2-16
DC-Shift Output .......................................................................................2-16
2.7.7 Control/Monitor and TOD Port............................................................2-17
Interface Connections..............................................................................2-17
Control/Monitor Port Details ....................................................................2-18
Time Of Day Port Details.........................................................................2-18
Status Output Details...............................................................................2-20
2.7.8 Other Options.....................................................................................2-21
High Frequency Synthesizer Output (Other Option -1) ...........................2-21
Low Frequency Synthesizer Output (Other Option -2) ............................2-24
ECL Frequency Synthesizer Output (Other Option -3)............................2-26
13 MHz Sinusoid Output (Other Option -4) .............................................2-29
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Odetics Telecom GPStarplus Model 365
365-8006 v
Section 3 Installation
3.1 INTRODUCTION.............................................................................................3-1
3.2 INITIAL INSPECTION.....................................................................................3-1
3.3 INSTALLATION OVERVIEW..........................................................................3-1
3.4 INSTALLATION PROCEDURES.....................................................................3-2
3.4.1 Antenna Installation..............................................................................3-2
Antenna Cable...........................................................................................3-3
In-Line Amplifier.........................................................................................3-4
Lighting Protection.....................................................................................3-4
Weather Proofing ......................................................................................3-4
Antenna Assembly.....................................................................................3-5
3.4.2 Chassis Installation..............................................................................3-6
3.4.3 Connecting a Computer or Modem ......................................................3-6
Section 4 Getting Started
4.1 INTRODUCTION.............................................................................................4-1
4.2 ASSISTANCE..................................................................................................4-1
4.3 INITIALIZATION..............................................................................................4-1
4.4 ANTENNA POSITION/MODE SELECTION....................................................4-3
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Section 5 Display Menus and Controls
5.1 INTRODUCTION.............................................................................................5-1
5.2 FRONT PANEL GENERAL DESCRIPTION....................................................5-1
5.2.1 LCD Screen..........................................................................................5-1
5.2.2 Display Cursor......................................................................................5-1
5.2.3 Display Contrast Adjustment................................................................5-1
5.2.4 Keyboard..............................................................................................5-2
5.3 MENU/DISPLAY OVERVIEW.........................................................................5-2
5.4 DETAILED SCREEN DESCRIPTIONS...........................................................5-9
5.4.1 MENU 1 - TIME....................................................................................5-9
Synchronization Mode Selection...............................................................5-9
Time Reference Selection .......................................................................5-11
Local Offset Selection..............................................................................5-12
Internal Offset Selection..........................................................................5-12
Time Code Format Selection...................................................................5-13
Daylight Saving Time Status Selection....................................................5-13
Leap Second Status ................................................................................5-15
5.4.2 MENU 2 - POSITION..........................................................................5-16
Antenna Position/Mode Selection............................................................5-17
Position Average and GDOP Status........................................................5-18
5.4.3 MENU 3 - EVENT TRIGGER/TIME TAG............................................5-19
Event Trigger Output Selection ...............................................................5-19
Time Tag Display Configuration..............................................................5-20
5.4.4 MENU 5 - FREQUENCY AND PULSE RATE OUTPUT.....................5-21
Frequency Output Port Configuration......................................................5-21
Pulse Rate Output Port Configuration.....................................................5-22
5.4.5 MENU 7 - FREQUENCY STATUS.....................................................5-23
5.4.6 MENU 9 - MAINTENANCE.................................................................5-24
Audio Annunciator Status and Internal Temperature...............................5-24
Receiver Operating Status and Control...................................................5-24
DAC Status and Control ..........................................................................5-25
RS-232 I/O Port Setup.............................................................................5-26
Setup Menu Title Mode............................................................................5-27
Firmware Version Status .........................................................................5-27
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5.5 MENU 8 - OPTION MENU DESCRIPTIONS.................................................5-28
High Frequency Direct Digital Synthesizer (Other Option -1)..................5-28
Low Frequency Direct Digital Synthesizer (Other Option -2)...................5-29
ECL Direct Digital Synthesizer (Other Option -3)....................................5-31
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Odetics Telecom GPStarplus Model 365
365-8006 ix
The configuration of the unit is as marked on the following GPStarplus Configuration
sheet. In this document, the option numbers on the configuration sheet are referenced
in Section Two, Specifications.
The complete Model Number of the unit is:
365 -
The unit is configured as follows:
GPStarplus CONFIGURATION
INSTALLED
OPTION
AVAILABLE
OPTIONS
OPTION
DESCRIPTION
OSCILLATOR CONFIGURATION
Oscillator 2High Stability Quartz (Ovenized)
3Low Profile Rubidium
POWER/CHASSIS CONFIGURATION
Power 185-264 VAC, 47-440 Hz
220-60 VDC (Not compatible with -3 Oscillator Option)
3120-375 VDC
OTHER OPTION
Other 0None
1High Frequency Direct Digital Frequency Synthesizer (100 kHz-15 MHz)
2Low Frequency Direct Digital Frequency Synthesizer (1 kHz-150 kHz)
3ECL Direct Digital Synthesizer (100 kHz-15 MHz)
413 MHz Sinusoid Output
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Odetics Telecom GPStarplus Model 365
365-8006 xi
GPStar
plus
Front and Rear Views
1
2
3
4
5
6
7
8
9
Menu
Edit
Enter
GPStar
PLUS
TIME AND FREQUENCY SYSTEM
0
Odetics
TELECOM
X
X
X
X
1
OUT
2
3
A
B
1PPS
OUT
5/10 MHz
IN
EVTRG
TAG
CODE OUT
AC
DC
ANT
I/O
IN
0
1
95 - 260 VAC
CONTRAST
(Typical unit configuration, shown without mounting ears)
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OdeticsTelecom GPStarplus Model 365
365-8006 General Information 1 - 1
Section 1 General Information
1.1 INTRODUCTION
The GPStarplus is a precision source for time and frequency that can be used as a
secondary reference to meet manufacturing, development, and calibration needs. The
standard instrument configuration consists of:
•a Global Positioning System (GPS) receiver
•a GPS disciplined ovenized Quartz oscillator
•a front panel LCD display and key pad
•a universal AC input power supply
The standard instrument configuration has the following Input/Output signals:
•one dedicated 1 PPS pulse rate output
•two independent Pulse Rate output signals with user selected rates
•one Time Tag input
•one user programmable Event Trigger output
•one AC Time Code output with three user selected code formats
•one DC Shift Time Code output (format as selected for AC output)
•three independent Sinusoid Frequency output signals with user
selected signal frequency
•one RS-232 I/0 control and monitor computer interface port
•one dedicated RS-232 Time-Of-Year message output port
•Power input
•Antenna input
Options are available to supplement or replace existing unit functions. The exact
configuration is shown on the GPStarplus Configuration/Parts List. Some of the
available options are:
•High performance ovenized Quartz oscillator, and Rubidium oscillator
•Wide input range DC power supply (not available with Rubidium Oscillator
option)
•Direct Digital Synthesizer
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365-8006 General Information 1 - 2
1.2 DESCRIPTION
The instrument's internal GPS receiver uses the Coarse Acquisition (C/A) code
transmitted by the NAVSTAR GPS satellites as timing reference. The Global
Positioning System (GPS) is a constellation of satellites that transmits time and
navigation information.
The C/A code is a sequence of 1023 binary, bi-phase, pseudo-random modulation of
the GPS carrier. The C/A code is also referred to as the standard or civilian GPS code.
The GPS time is maintained by the United States Air Force and is traceable to the
United States Naval Observatory (USNO). The accuracy is influenced by Selective
Availability (S/A). Selective Availability is the method used by the United States
Department of Defense to degrade the accuracy of the C/A code. It is designed to
prevent hostile forces from using the GPS system effectively.
Operation is automatic and self-calibrating. Methods of controlling and monitoring the
performance are provided via the front panel display and the RS-232 I/O interface.
A front panel LCD display provides indication of time, position, satellite information,
operating status, oscillator performance, and setup. The display is permanently back-lit
to enhance readability under varying ambient light conditions.
Additional information regarding the GPS system, system status, and satellite health
can be obtained from:
Civil GPS Information Center
Voice: (703) 313-5907, Computer: (703) 313-5910
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OdeticsTelecom GPStarplus Model 365
365-8006 Specifications 2 - 1
Section 2 Specifications
2.1 GENERAL
The unit is designed for reliable and maintenance free operation. All connectors are
located on the rear panel of the unit for ease of accessibility.
The unit consists of a chassis that can be mounted in a 19-inch equipment cabinet with
the supplied removable mounting handles. The standard unit is cooled through
convection and conduction. In units configured with the Rubidium oscillator option, an
internal cooling fan is used.
2.2 OPERATING DETAILS
2.2.1 Operating Mode Definitions
2.2.1.1 Warm Up
When power is applied, the unit enters a 10-minute warm-up period. During this period
the internal oscillator is allowed to stabilize. If the internal GPS receiver is operating in
Warm Start and has locked-on GPS time, the oscillator disciplining starts immediately
after the warm-up period. If the internal GPS receiver is operating in Cold Start, the
disciplining starts after the receiver has collected a new almanac from the GPS
satellites and has locked-on GPS time.
2.2.1.2 Cold Start
In the Cold Start mode the internal GPS receiver collects a new Almanac from the GPS
satellites. If the user has not entered the antenna position, the receiver automatically
determines the position. The major time (days through seconds) is not valid until
sufficient data has been collected and the receiver has locked to the GPS time.
2.2.1.3 Warm Start
The Warm Start mode is active when the unit has its power applied after the internal
receiver collected and saved the satellite Almanac data during prior operation.
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2.2.1.4 Time Locked
In the Time Locked mode the unit's major and minor time is synchronized to UTC. The
1 PPS output from the unit's internal GPS receiver is used to discipline the internal
oscillator and the phase of the 1 PPS output reference pulse. The effects of Selective
Availability are averaged out to minimize errors otherwise caused by Selective
Availability. The accuracy of the unit's 1 PPS output is indicated by the Time Figure Of
Merit, TFOM. Normally, the TFOM is 4 while operating in the Known position mode,
and 4 or 5 when operating in the Dynamic or Position Averaging mode. The TFOM
value is displayed on Menu 1 of the front panel display.
2.2.1.5 Coasting
The Coasting mode is entered after out of range inconsistencies in the major time (days
through seconds) or 1 PPS have been detected, or if the internal receiver has lost lock
with all satellites. This mode can only be entered from the Time Locked mode.
In the first stage of this mode, the internal oscillator is in holdover (i.e. not being
disciplined) to retain the accuracy of the output signals. The timing output accuracy is
indicated by the Time Figure Of Merit (TFOM). In the first stage of this mode, the TFOM
is the same value as that while operating in the Time Locked mode.
When operating in the Coasting mode for extended periods, the TFOM value changes
according to the estimated time error computed from the following formula: Error = nf;
where n = number of seconds since time lock was lost, and f = frequency default error.
In the last stage of the mode, when the conditions needed to start the disciplining and
synchronization process are met and then started, the unit will automatically change to
the Recovering mode if the timing error is greater than 10 µs or, if the timing error is
less than 10 µs, directly to the Time Locked mode.
At the moment the last stage of the mode is entered, the TFOM indicates the actual
measured accuracy of the timing output. The following table lists the TFOM values that
could be displayed and provides the corresponding Time Error.
TFOM Value Time Error TFOM Value Time Error
4to <1 µs 7> 100 µs to <1 ms
5> 1 µs to <10 µs 8> 1 ms to <10 ms
6> 10 µs to <100 µs 9> 10 ms
Note: During warm up, TFOM is assigned a value of 9.
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365-8006 Specifications 2 - 3
2.2.1.6 Recovering
In the Recovering mode the unit adjusts the internal timing and/or the frequency of the
internal oscillator until the Time Locked mode criteria is met. Expect an eventual
transition to the Time Locked mode (unless changing conditions prevent this; for
instance: loss of tracked satellites, or change of internal offset selection).
2.2.1.7 Disciplining Period
When the unit enters the Time Locked mode for the first time after power is applied, the
time and output signals are synchronized to GPS, and are phase and frequency
corrected as needed to maintain the specified accuracy of the output signals. A
hardware/firmware estimator continuously compares the GPS 1 PPS with the internally
generated 1 PPS, derived from the unit's oscillator, to determine the correction
necessary to discipline the oscillator. The estimator filters out the short-term variations
inherent in the GPS 1 PPS.
2.2.2 OPERATING CHARACTERISTICS
Initial Acquisition Time
Receiver in Cold Start ...........................< 60 minutes to acquire current
almanac, position, and time lock
Receiver in Warm Start
With -1 Oscillator Option............ < 15 minutes to acquire Time Lock
With -2 Oscillator Option............ < 30 minutes to acquire Time Lock
With -3 Oscillator Option............ < 45 minutes to acquire Time Lock
Automatic Position Solution Period........................24 hours after acquiring
current almanac
(assuming 4 satellites are in view)
Initial Disciplining Period ...............< 24 hours after initial acquisition while
operating in the Known position time solution mode
Set-Up Data Retention................. Indefinite, stored in non-volatile memory
Receiver Almanac Data..................................................48 hours minimum
1 PPS Correction after Coasting Mode
Timing Error < 10 µs..........................<1 ns per second step resolution
Timing Error >10 µs, < 100 µs.........100 ns per second step resolution
Timing Error >100 µs.............................Single step re-synchronization
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365-8006 Specifications 2 - 4
2.3 MECHANICAL
Height .................................................................1.75" (44.5 mm) maximum
Chassis Width....................................................16.75" (425 mm) maximum
Panel Width (without handles)...........................16.75" (425 mm) maximum
Panel Width (with handles)................................19.00" (483 mm) maximum
Depth (excluding protrusions)...................................12" (305 mm) nominal
Weight ......................................................................5-LB (2.3-kg) nominal
Panel Color............................................... Fed-Std 595 color 26559 (gray)
The unit is supplied with removable adapters to fasten the unit in a standard 19"
equipment enclosure. The adapters also function as handles.
2.4 ENVIRONMENTAL
GPStarplus
Operating Altitude...........................................................- 300 m to 4000 m
Storage Altitude..............................................................- 300 m to 9000 m
Operating Temperature ........................................................00C to + 550C
Storage Temperature....................................................... - 400C to + 850C
Temperature Rate of Change...............................+/- 100C/Hour maximum
Relative Humidity............................................5% to 95%, non-condensing
Antenna (Optional)
Operating Altitude...........................................................- 300 m to 4000 m
Storage Altitude..............................................................- 300 m to 9000 m
Operating Temperature ................................................... - 400C to + 850C
Storage Temperature....................................................... - 450C to + 900C
Humidity.................................................................... Outdoors-All Weather
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365-8006 Specifications 2 - 5
2.5 POWER REQUIREMENTS
2.5.1 Power Supply Option -1 (Standard AC Input)
Voltage...................................................................................85 to 264 Vac
(universal input)
Isolation................................................................ 1.5k Vac, input to output
Frequency................................................................................47 to 440 Hz
Power.............................................................................50 Watts (nominal)
2.5.2 Power Supply Option -2 (Low DC Voltage)
Note: this configuration is not available for units equipped with a Rubidium oscillator.
Voltage.....................................................................................20 to 60 Vdc
Inrush Current....................................................................5 amp maximum
Input Over-current Protection ..............................................Internally fused
Steady State Current (20 VDC input) ..................................1.3 A maximum
Isolation Voltage, Input to ground...................................................500 Vdc
Isolation Voltage, Input to Output.................................................. 500 Vdc
Connector......................................................................... MS3102Fl4S-7P
Mating Connector (supplied with unit).............................. MS3106Al4S-7S
Input Power Connector Pin Designation
Pin A..............................................................................Chassis ground
Pin B......................................................................................+ DC Input
Pin C.......................................................................................- DC Input
On/Off Control..................................................................Rear panel switch
2.5.3 Power Supply Option -3 (High DC Voltage)
Voltage.................................................................................120 to 375 Vdc
Isolation................................................................ 1.5k Vac, input to output
Power.............................................................................50 Watts (nominal)
Input Power Connector Pin Designation
Pin A..............................................................................Chassis ground
Pin B......................................................................................+ DC Input
Pin C.......................................................................................- DC Input
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