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Star Sync includes the Heavy Duty Receiver and PCI ClockCard
ClockWatch Star Sync
Specifications
Heavy
Duty
|
| Received Frequency |
1575.42 MHz (L1)
Coarse Acquisition (C/A) |
| Satellites Tracked |
up to Twelve,
simultaneous |
| Acquisition
Time |
Cold start,
typically less than 20 minutes. Warm start with ephemeris data and
position, typically less than 2 minutes. |
| Accuracy |
Typical
Network: ±30 millisecond typical |
| Inputs/Connectors |
RS-232 Setup
Interface: DB9 female
The port works at 19200 baud, 8N1. |
| Power |
115 VAC to 5 VDC @ 0.3 amps, UL/CSA approved power adapter
(supplied). An international power supply (90-264
VAC input) is available for applications
outside North America at no extra charge. |
| Warranty |
One year |
| Weight |
1.3 lbs. (0.59
kg) |
| Temperature |
32° to 122° F,
0° to 50°C operating range, 0 to 95% relative humidity, non condensing |
| Antenna |
 |
| Size |
Size: 2.22" (w) x 3.79" (l) x 1.05" (h) (56.4mm x 96.3mm
x 26.7mm)
Weight: 3.88 oz. (110 g), not including cable
Cable: 10' of antenna cable.
Mounting brackets
available separately. |
| Temperature |
-30° to +80° C
operating range |
|
Standard
Duty |
Receiver:
- Differential-ready 12 parallel channel receiver tracks and uses up to
twelve satellites to compute and update a position.
Acquisition Times:
- 15 seconds warm (all data known)
- 45 seconds cold (initial position, time and almanac known, ephemeris
unknown)
- 5 minutes AutoLocate (almanac known, initial position and time unknown)
- 5 minutes search the sky (no data known)
Update Rate:
- 1 pulse per second (+/-1
microsecond subject to Selective Availability), continuous
Antenna:
Physical
- Single construction integrated
antenna/receiver
- Weight: 125 g,
including cable
- Size: 61 mm in diameter and 19.5 mm in
height
Environmental
- Operating Temperature: -30°C to +80°C
- Storage Temperature: -40°C to +90°C
Power
- Input Voltage: 120 VAC to 5 VDC volt power supply
(included),
International power supply is also available
- Typically draws 60 mA @ 5 VDC
Backup Power
- Internal 3V Lithium coin cell battery,
recharges during normal operation, holds up to 6 month charge, up to 10 year
life
|
| Portable |
Receiver
- Differential-ready 20 parallel channel
receiver tracks and uses up to twenty satellites to compute and update a
position.
Acquisition Times
- 35 seconds warm (all data known)
- 42 seconds cold (initial position,
time and almanac known, ephemeris unknown)
- 5 minutes Auto Locate (almanac known,
initial position and time unknown) 5 minutes search the sky (no data
known)
Update Rate
- 1 pulse per second (+/-1 microsecond subject to
Selective Availability), continuous
Antenna
- Built in patch antenna
- Single construction integrated antenna/receiver
Physical
- Weight: 115 g, including cable
- Size: 42 x 35 mm and 15 mm in height
- Integral magnetic mount
- LED
Blue blinking LED when GPS is fixed
Environmental
- Operating Temperature: -40°C to +85°C
- Storage Temperature: -55°C to +100°C
Interface
- RS-232 (DB 9-pin male serial port)
- Port parameters: 9600 baud (8,1,n)
Input Voltage
- 3.3 to 5 VDC
- USB (type-A plug) power cable (included)
Typically draws 62 mA @ 5 VDC
Backup Power
- Internal battery, recharges during normal operation,
allows for fast time to first fix (TTFF)
|
|
Client Software |
- An NIST or NTP client is required for
client-side synchronization with the network time server.
-
ClockWatch Client is recommended for clients running MS
Windows.
-
Contact Beagle Software for recommendations on clients for other
operating systems.
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External Time Sync Protocols Supported |
- NIST
- Daytime
- ACTS
- NTP (RFC 1305)
- SNTP (RFC 1361)
- TIME (RFC 868)
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Internal Time Sync Client Protocols Supported |
- NIST
- Daytime
- NTP (RFC 1305)
- SNTP (RFC 1361)
- TIME (RFC 868)
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Star Sync Product Information:
Advanced Features
Frequently Asked Questions about GPS
Star Sync GPS Receiver
Installation Information -
Installation Video
Antenna Mounting Options
Star Sync Main Page
Star Sync Site Index
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Questions?
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For
more information on Star Sync, please complete the
information request form. Or call us
toll-free at 1-877-845-2549. |
|
PCI CARD |
| Setup |
- Address: plug and play compatible
- Interrupt: None required
|
| Operating
Systems |
- Windows 98SE/ NT/2k/2003*/XP*
*32-bit versions only. Not
currently supported on 64-bit platforms or on any versions of Windows
Vista
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| Bus |
|
| Clock |
- Power control circuitry supports system power on
from date/time alarm or key closure
- Century register, Y2K–compliant
- Date alarm register
- Compatible with existing BIOS
- Timekeeping algorithm includes leap year compensation
valid up to 2100
|
| Oscillator |
- Temperature-Compensated 32 KHz Crystal Oscillator
- Meets the 1998 European network server recommendation
for real-time clock (RTC) accuracy.
- The steady 32.768 kHz output of the DS32KHz maintains
the accuracy of the real-time clock within 2 PPM (±1 minute) per year from 0
to 40°C
- Temperature Stability: < 2 PPM 0 - 40 °C
- Calibration: < 1 PPM @ 23 °C (room
temperature)
- Aging: < 1 PPM
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| Battery
|
- Includes replaceable lithium battery for backup power.
- Battery is lithium thionyl chloride, high drain
capability 3.6V AA-sized cell. It has a 2.25Ah rated capacity. Battery will
operate reliably up to 85C, and has a self discharge rate of less than 0.5% a
year. Has a stainless steel container and hermetic glass-to-metal sealing.
Widely used in military, aerospace and technical service.
- Battery Life: approximately 5 years without host computer
power.
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| Dimensions |
- PCI card - 4.5" l x 4.0" h
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|
ISA CARD |
| Setup |
- Address: User selectable with jumpers (6 possible DMA addresses)
- Interrupt: None required
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| Operating
Systems |
- Windows, DOS
(no drivers required)
|
| Bus |
- ISA bus, short (8 bit) slot.
|
| Clock Resolution |
|
| Oscillator |
- Temperature Stability: < 5 PPM 0 - 50 °C
- Calibration: < 1 PPM @ 23 °C (room
temperature)
- Aging: < 1 PPM
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| Power Requirements |
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| Battery
|
- Includes integral lithium battery for backup power
- Battery Life: approximately 5 years without host computer
power.
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| Dimensions |
- half height ISA card - 4.8" l x 3.0" h
|
Temperature
Compensation in the PCI version Oscillator
The ClockCard PCI includes a temperature
compensated 32KHz oscillator DS32KHz is a highly accurate replacement for
standard 32.768-kHz crystals commonly used in real time clocks (RTC).
The oscillator provides accuracy at ±1 minute per
year (±2 parts per million) in operation from 0 to 40°C, making it one of the
industry's most accurate 32.768-kHz oscillators.
Accurate timekeeping is very important in network
servers that have lots of PCs connected to them, With timed-access
communications, there's a need for accuracy and synchronization. When a great
deal of information is coming in and every system time-stamps it differently,
more accurate references are needed.
Nobody puts an RTC in a system and expects it to keep inaccurate time. Most
people don't understand why a $9.95 watch can keep accurate time but a $3,000 PC
and a $20,000 server can't. Watches keep good time because they're trimmed to
operate at body temperature. The inside temperatures of most computer chassis
vary more than few degrees.
Most other Real time clocks are calibrated to keep time accurately at 25°C. If
internal computer temperatures are hotter or colder, the clocks run more slowly.
Accuracy over temperature typically depends on crystal characteristics, and
higher accuracy over temperature is achievable by trimming the crystal.
Accuracy needs to be repeatable day in and day out Timekeeping in computers that
operate at elevated temperatures can be significantly inaccurate. The effect of
temperature on accuracy is cumulative; it is not self-correcting.
Inside the ClockCard PCI oscillator package are a quartz crystal and a
temperature-compensation IC. The compensation IC employs low current oscillator
technology and thermal-sensing technology. It is this temperature
compensation that gives the overall precision of the PCI ClockCard in the 2 PPM
range.
ClockCard PCI meets the precision timekeeping requirements of large computer
networks, financial transaction processing applications, and timed-access
communications.
Oscillator Error, ISA version
The precision of the ClockCard is entirely dependent on the quality of the oscillator
circuit. There are three sources of error in the oscillator: (1)
calibration error, (2) temperature stability, and (3) aging. Understanding
these will
allow you to estimate the precision of the ClockCard in your application.
Calibration error: The ClockCard oscillator is calibrated at the factory to within
1 PPM part per million)
of its specified frequency at room temperature (23° C or 73° F).
Temperature Stability: The frequency of oscillation of crystal oscillators is highly dependent on temperature.
The oscillator used in the ClockCard has an extremely low temperature dependency of 5 PPM
from 0° C to 50° C (32° F to 122° F). Since the oscillator is calibrated to 1 PPM at room temperature (23 °C), it will only exhibit 1 PPM error if its environment is held
to this temperature. The worst case condition is if the temperature of the ClockCard is
held at one of the extremes, 0 or 50 °C. At
these points, there will be an error of 5 PPM. If the temperature variation covers a
smaller span, less error will be exhibited.
Aging: All crystal oscillators have an aging characteristic. The crystal used in the ClockCard
uses the coldweld manufacturing technique, which exhibits the lowest aging characteristic
of 1 PPM per year. In practice, this aging rate improves significantly with time, but for
practical purposes the value of 1 PPM is adequate.
To estimate the error in your application, sum the error from the three sources above.
This estimate can be used to determine how frequently the time should be updated using
Beagle Software's ClockWatch or another method.
Parts Per Million (PPM) Terminology
The unit PPM (parts per million) provides a number similar to error expressed with
percentages, but reduces the number of decimal places required. For example, 0.001%
converts to 0.00001which is equivalent to 10 PPM. Using the PPM notation makes it easier
to deal with very small deviations.
The PPM terminology is also useful for calculating ClockCard error in terms of seconds
per month. Since an average month has approximately 2.63 million seconds, if the ClockCard
error was 2 PPM, then total error for the month would be 2 x 2.63 = 5.26 seconds.
ClockCard Product Guide
ClockCard Product List
ClockCard Main Page
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