GPSDO GNSSDO GNSS Disciplined Oscillator
Disciplined Clock with 10MHz Output Support For GPS+GALILEO
Specifications:
- Model No.: GNSSD0-10MHz
- Item Name: GPSDO Upgraded Version
- Power Supply: DC11.7-12.9V; ≤15W
- Antenna Power Supply: DC5V
- Compatible Satellite: For GPS+GALILEO
- 1PPS Output Waveform & Amplitude: Square Wave, 3.3Vpp
- 10M Output Waveform Amplitude: Sine Wave, 1Vrms,
(13dBm+-3dB)
- RS232 Output:NMEA Protocol, 9600BPS
- Accuracy: After GNSS is locked, frequency accuracy can
reach 5E-9 (0.05Hz@10MHz) within 5 minutes. Finally, accuracy will reach 2E-11
(0.0002Hz@10MHz)
Package Included:
- 1 x GNSS Disciplined Oscillator
- 1 x AC110-220-DC12V Transformer
- 1 x 3m GPS Antenna
FAQ:
Q1: What is GNSS? What is GNSSDO?
A1: GNSS stands for Global Navigation Satellite System, which
refers to the group of satellites that are providing signals from space used to
transmit and position data. And by definition GNSS provides a whole Global
Coverage. GNSS itself includes several positioning terms like GPS, GLONASS,
Galileo, Beidou and other regional systems.
GNSSDO is an abbreviation for Global Navigation Satellite
System disciplined oscillator. Use GNSS timing to adjust clocks to make clocks
more accurate.
Q2: What is the basic
principle of the GNSS Disciplined Oscillator? Why is it more accurate than the
atomic clock?
A2: The basic principle of the GNSS Disciplined Clock: The
standard time signal output by the GNSS module is generally a second pulse (1
pps) to control or compare the frequency of the constant temperature crystal
oscillator, and then output a signal to correct the frequency error of the
constant temperature crystal oscillator.
Since the output of the GNSS signal has no cumulative error
and long-term accuracy is high, the tempered constant temperature crystal
oscillator is more accurate than the atomic clock.
Q3: Where is the GNSSDO
applied?
A3: Usually, it is used as a standard source of reference in
cellphone base stations.
Q4: Can it be used without the
antenna?
A4: Yes. Without antenna, the GNSSDO is used as an OCXO with
keeping performance.
Q5: Where to place the
antenna? Can it be used indoors or next to windows? What can we do if GNSS
fails to lock?
A5: Please use it outdoors, facing to the sky directly.
Please not use it indoors or next to windows. When the antenna is facing to the
sky, at least 1 / 5 of the sky area should be available. Otherwise, GNSS signal
and frequency accuracy are poor due to small sky area.
When GNS cannot be locked, please put it in an open space or
place an iron plate on the back of the antenna. Properly adjustable the
distance between the iron plate and the antenna, enhancing the signal.
Q6: What to do if the antenna
is not long enough?
A6: Extension cables can be added. For example, we used an 8m
extension cable to test application environment.
Q7: Can the antenna connect to
your CATV's antenna?
A7: No. There is no GNSS signal in your CATV.
Q8: How to use the equipment?
A8: Connect it to the antenna and make the antenna facing to
the sky. Connect to DC12V power supply. And BNC port will output 10MHz and 1PPS
signals.
Q9: Can I change the supported
satellite by myself?
A9: Please not modify. It may make the GNSSDO fail to work.
Q10: Can it be used in HiFi
field and in speakers?
A10: With accurate frequency, improved acoustic details,
enhanced resolution and reduced background noise, it can be used in audio field.
Q11: The output signal of the
GNSSDO is 10MHz. Does it support my DAC with 16.9344MHz?
A11: Yes. You can use a converter to change 10MHz signal into
16.9344MHz signal.
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