GPS Disciplined Oscillator with Frequency Synthesizers
SYNC25104HR and SYNC35104HR
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| Rugged IDAN configurations available |
Description
The SYNC25104HR and SYNC35104HR are GPS disciplined oscillator (GPSDO) boards which provide high accuracy frequency and time reference signals to PC104 systems and external devices. These boards utilize the u-blox LEA-M8F GPS receiver which locks the output signal of a low-noise, high-precision, oven-controlled crystal oscillator (OCXO) to the GNSS satellites. The 10MHz signal from the OCXO is available on the SyncBus connector or two MMCX connectors and is fed into a low noise synthesizer (SI5395). The synthesizer can generate signals up to the gigahertz range. The board connects to the CPU via USB. An additional RS232 serial port is also provided to the GPS receiver which can be used for synchronizing the CPU clock to the GNSS. This module can provide +3.3V to active antennas or can be used with passive antennas.
Key Features
- GPS/GNSS disciplined precise frequency (10MHz, or any frequency) and low phase noise clock signal generation based on uBlox M8F technology with OCXO
- Long time frequency accuracy is app. 1.5 * 10-12–atomic clock precision
- Concurrent reception of GPS/QZSS, GLONASS, BeiDou
- Industry leading acquisition sensitivity and single-satellite timing
- SBAS (WAAS, EGNOS) can be activated to reach 2.0 m position accuracy
- Max. navigation update rate 1/s.
- Time tagging, max. 1PPS
- precise “any frequency” clock generation based on Silicon Labs DSPLL technology
- precise “any frequency” sampling / updating cooperating with RTD DAQ boards using RTD SycBus
- UTC time, GPS 1PPS signal can be used to trigger events ±20ns precision at different geographical position
Applications
- Precise 10MHz (“any frequency”) master clock generation in PC104 systems
- Time Difference of Arrival (TDOA) applications f.e. in passive radars
- Network time servers (NTP/PTP) can be created cooperating with RTDs cpuModules with Ethernet interface
- Precise time synchronization for vibro-acoustics measurements on large structure analysis
- Precise time synchronization for seismic exploration systems
- Time synchronization between distributed acoustic sensor system for seismic activity monitoring
- Precise time and clock distribution between geographically remote places
- Free space quantum key distribution (Free Spce QKD) – detect entangled photon event
Technical Details
- PC/104 form factor
- PCIe x4 Gen3 Interface
- PCIe/104 stackable bus structure
- PCIe Type 2 expansion bus
- PCI pass-through expansion bus (SYNC25- versions only)
- USB 2.0 interface (only on Type 2 expansion bus)
- GNSS receiver is accessible via a USB serial converter
- DSPLL synthesizer is accessible via a USB SPI converter
- u-blox LEA-M8F GNSS engine
- L1 1575.42MHz, C/A code
- L1OF 1602MHz
- BeiDou B1 1561.098MHz
- Galileo E1B/C
- 72-channel satellite tracking
- Position accuracy: 2.5m without SBAS
- Time accuracy of 20ns
- 1Hz update rate
- Tracking sensitivity down to -165 dBm
- Supported protocols: NMEA-0183 ver. 2.3, 4.0 or 4.1 configurable, UBX, RTCM 2.3
- Constellation system support:
- GPS
- GLONASS
- GALILEO
- BeiDou
- QZSS
- DGPS support:
- (SBAS) Satellite-Based Augmentation System
- (RTCM) Radio Technical Commission for Maritime Services
- (WAAS) Wide-Area Augmentation System
- (EGNOS) European Geo-Stationary Navigation System
- (MSAS) MTSAT Satellite-Based Augmentation System
- (GAGAN) GPS-Aided Geo-Augmented Navigation
- Supports active (+3.3V) and passive antennas
- SI5395 ultra low jitter clock multiplier
- 8 any frequency outputs
- 4 differential outputs on a 100-mil header
- 2 single ended outputs on MMCX connectors
- 2 differential outputs on the SyncBus connector (bus LVDS)
- Software configurable output standard and frequency
- Differential: 100Hz-1028MHz
- LVCMOS (single-ended): 100Hz-250MHz
- Available in stackable, rugged enclosures
- Requires only +5 VDC for operation
Connector Interface
- Stackable Buses
- PCIe Type 2 expansion bus
- PCI pass-through expansion bus (SYNC25- versions only)
- External I/O Connectors
- 16-pin right-angle header: SyncBus
- Optional stack through (-SS) connector to connect to other RTD products
- Optional stack up (-SNS) connector to connect to other RTD products
- 16-pin right-angle header: any-frequency output
- 4 programable differential outputs
- Differential outputs 2-5
- MMCX: GPS antenna input with 3.3V antenna bias available
- MMCX: time mark input
- MMCX: 1 PPS Output
- MMCX: any-frequency output 6
- MMCX: any-frequency output 7
- MMCX: 10 MHz output
- 10-pin right-angle header: serial port
- TX is an input & RX is an output for direct connection to the CPU serial port
- RI, DCD & DSR are tied together as 1 PPS output for time synchronization with CPU in system
- GPS active/passive antenna
- 16-pin right-angle header: SyncBus
Software
- GPS data available to CPU via USB interface
- u-blox software and manual
- Documentation for the u-blox software
- Description of the receiver’s protocol
- Utilities
- Ubx_config: uploads a config file to the chip
- Ubx_monitor: works as a packet monitor (Note: required ubx_library lib supplied)
- Frequency synthesizer setup
- Linux (driver built into kernels > 3.8)
- The GNSS receiver can be used under Linux with the built in FTDI drivers
Physical Attributes
- Dimensions
- Length (L): 3.775 inches (95.89 mm)
- Width (W): 3.550 inches (90.17 mm)
- Stand-off Height
- Above the module: 0.866 inches (22.00 mm)
- Below the module: 0.600 inches (15.24 mm)
- Weight: 0.15 lbs. (0.06 Kg)
- Standard Operating Temperature, 90% humidity non-condensing: -40 to +85°C
- Storage Temperature: -55 to +125°C
- MTBF: 1,211,210 hours
- Input Power Requirements: +5 VDC
- Typical Power Consumption (unterminated measurements): 3.8 W
Documentation and Downloads
Ordering Information
| Part Number | Description | Value OEM |
|---|---|---|
| SYNC35104HR | PCIe/104 GPSDO board with variable frequency outputs | $1545 |
| SYNC35104HR‑SS | PCIe/104 GPSDO board with variable frequency outputs and stackthrough SyncBus | $1545 |
| SYNC35104HR‑SNS | PCIe/104 GPSDO board with variable frequency outputs and non-stackthrough SyncBus | $1545 |
| SK‑SYNC35104HR | Starter kit including SYCN35104HR and antenna | $1595 |
| SK‑SYNC35104HR‑SS | Starter kit including SYCN35104HR with stackthrough SyncBus and antenna | $1595 |
| SK‑SYNC35104HR‑SNS | Starter kit including SYCN35104HR with non-stackthrough SyncBus and antenna | $1595 |
| SYNC25104HR | PCI/104-Express GPSDO board with variable frequency outputs | $1595 |
| SYNC25104HR‑SS | PCI/104-Express GPSDO board with variable frequency outputs and stackthrough SyncBus | $1595 |
| SYNC25104HR‑SNS | PCI/104-Express GPSDO board with variable frequency outputs and non-stackthrough SyncBus | $1595 |
| SK‑SYNC25104HR | Starter kit including SYCN25104HR and antenna | $1645 |
| SK‑SYNC25104HR‑SS | Starter kit including SYCN25104HR with stackthrough SyncBus and antenna | $1645 |
| SK‑SYNC25104HR‑SNS | Starter kit including SYCN25104HR with non-stackthrough SyncBus and antenna | $1645 |
RTD Embedded Technologies, Inc.
Designed and Made in the USA
sales@rtd.com | +1-814-234-8087