GPS Disciplined Oscillator
Model GF-8557Discontinued Products
The GF-8557 is a high sensitivity GPS Disciplined Oscillator with internal OCXO, which provides highly-accurate and highly-stable 1PPS/10MHz.
The GF-8557 outputs 1PPS synchronized with UTC as well as 10MHz coherent to 1PPS.
The GF-8557 is designed especially for wireless broadband base stations for CDMA, WiMAX, and LTE networks and for multimedia broadcast base stations.
Built-in high sensitivity GPS receiver.
Provides highly-stable frequency and highly-accurate UTC time anywhere around the world.
Outputs 1PPS (pulse per second) synchronized with UTC time.
Outputs 10MHz sine wave and square wave coherent to 1PPS.
Continuously outputs highly-accurate and highly-stable 1PPS and 10MHz clock even when only one GPS satellite signal is received.
Continuously outputs highly-accurate and highly-stable 1PPS and 10MHz clock even when the GPS signal is lost in holdover.
Maintenance-free with the OCXO controlled by GPS.
DGPS with SBAS satellites (WAAS/MSAS/EGNOS).
|GNSS Reception Capability||GPS L1 C/A, SBAS L1 C/A|
|GNSS Reception||14 channels (GPS, SBAS)|
|Sensitivity||-140dBm to -110dBm|
|10MHz Output (Normal Status)||Frequency Accuracy:< ±1×10-12|
|1PPS Output (Normal Status)||1PPS Accuracy: < ±150ns|
1PPS Stability: < 30ns(1σ)
|10MHz Output (Holdover)||Frequency Accuracy: <±1×10-9/24h (Temperature alternation within 20°C )|
|1PPS Output (Holdover)||1PPS Accuracy: <±8μs/24h (Temperature alternation within 20°C )|
|Power Consumption||Normal Status < 10W, Startup < 14W|
|Operating Temperature||-20°C to +80°C|
|Antenna Detection||Short and Open Detection|
|Outer Size||100mm×100mm×19.9mm (It excludes the interface connectors.)|
|Protocol||NMEA 0183 , TOD|
* Specifications subject to change without notice.
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