This is a GPS-disciplined, temperature-controlled crystal oscillator (GPSDO), which is recommended for use with a USRP B200/B210. The GPSDO provides a high-accuracy 10 MHz reference and 1 PPS signal, which allows developers to build systems that serve applications with improved frequency accuracy (75 ppb in unlocked condition) or global timing alignment (50 ns in locked condition).
Unlike the OCXO-based version, which is recommended for use with the USRP X300/X310, this lower power module can be used with the USRP B200/B210 in a USB bus-powered configuration.
We recommend reading the GPSDO Selection Guide to ensure this is the right device for your application.
| Module Specifications | ||
| 1 PPS Accuracy | ±50ns to UTC RMS (1-Sigma) GPS Locked | |
| 1 PPS Output | 3.3VDC CMOS | |
| RS-232 Control | NMEA & SCPI-99 Control Commands, Integrated into UHD | |
| GPS Frequency | L1, C/A 1574MHz | |
| GPS Antenna | Active (5V compatible) or Passive | |
| GPS Receiver | 50 Channels, Mobile, WAAS, EGNOS, MSAS capable | |
| Sensitivity | Acquisition -142dBm, Tracking -168dBm | |
| TTFF | Cold Start: <45 sec, Warm Start: 1 sec, Hot Start: 1 sec | |
| ADEV | 1E-11 at 1s | |
| Warm Up Time / Stabilization Time | <5 min at +25C to 1E-08 Accuracy | |
| Supply Voltage (Vdd) | 3.3V | |
| Power Consumption | 0.5W Max | |
| Operating Temperature | 0C to +60C | |
| Storage Temperature | -45C to 85C | |
| Oscillator Specifications | ||
| Frequency Output | 10MHz | |
| 10MHz Retrace | ±2E-08 after 1 hour at 25C | |
| Frequency Stability Over Temperature (Unlock Condition) | ±7.5E-08 | |
| Warm Up Time | < 1 min at +25C | |
| Phase Noise at 10MHz | 1Hz | -65dBc/Hz |
| 10Hz | -102dBc/Hz | |
| 100Hz | -132dBc/Hz | |
| 10kHz | <-152dBc/Hz | |