Leo Bodnar GPSDO Precision Reference Clock GPS Disciplined Oscillator
Specifications
| Return Shipping Will Be Paid By | Seller |
| All Returns Accepted | Returns Accepted |
| Item Must Be Returned Within | 30 Days |
| Refund Will Be Given As | Money Back |
| Brand | Leo Bodnar |
| MPN | Does Not Apply |
| Signal Generator Type | RF Signal Generator |
| Frequency Range | 400Hz - 810Mhz |
The Leo Bodnar GPSDO (GPS disciplined oscillator) precision reference clock is a cost-effective and simple mechanism to stay on frequency. This clock outputs a low-jitter reference signal frequency-locked to GPS. High accuracy GPS Caesium references provide long term output signal stability, while an internal TCXO (temperature-compensated crystal oscillator) source provides a high-quality, low phase noise clock signal with sub-picosecond RMS jitter. Digital PLL enables many output reference frequencies between 450Hz and 800MHz. The output signal is a square wave at 3.3V CMOS levels with 50Ω characteristic impedance. The SMA | Mini USB form factor case is approximately 2 1/4" x 1 1/2" x 5/8". The BNC | USB-B form factor case is approximately 3 1/2" x 2 1/4" x 1". Includes an active GPS antenna (5m length with magnetic base) but supports other active or passive antennas. If I don't know I need this, why do I need this? These units are a fantastic addition to the tool kit: https://www.youtube.com/watch?v=p-NUnCnOHHI What's the difference between the two form factors? Which one do I want? Other than input types, the BNC version notably has two clock outputs. The second is limited to the identical or a fractional multiple of the first frequency. In some instances, you may find that two smaller units better suit your application. Most hobbyists opt for the less expensive SMA version, but I prefer the BNC version for workbench use (even for portable it's not much bigger). ______________________________________________________________ Technical details: Output drive has four settings. Output power level (10MHz):+10.3dBm (32mA), +9.9dBm (24mA), +9.0dBm (16mA), +6.4dBm (8mA) Typical phase noise at 10MHz output:-70 dBc/Hz (1 Hz), -100 dBc/Hz (10 Hz), -125 dBc/Hz (100 Hz), -145 dBc/Hz (1 kHz), -150 dBc/Hz (10 kHz), -153 dBc/Hz (100 kHz), -155 dBc/Hz (1 MHz) USB power draw is 5V 250mA. The BNC | USB-B version also accepts an external 5-12VDC power input (2.5mm inner pin | 5.5mm outer diameter). Operation requires a GPS signal, however temporary loss is tolerated seamlessly. GPS acquisition time after power-up approximates 30 seconds. If GPS signal is lost, digital PLL maintains the best estimated output frequency based on historical data. On reacquisition of GPS lock, output is seamlessly brought back in sync with the GPS reference. Entry and exit of frequency hold occurs without glitch. All frequency and output settings are user-configurable via USB connection from Windows or MacOS. Software is available from manufacturer website and Apple App Store. GPS clock can be powered via USB from computer, charger or power bank. USB connection to computer is required only for initial or reconfiguration. Settings are stored inside the device and maintain values when off. The SMA antenna connector voltage is 3.3V. Most active antennas work on a wide range - 2.5v to 5v because internal analogue LNA is not sensitive to power level. Reference clock use cases:Lab equipment, instrumentation, or RF transmitterReceiving equipment, RTL SDRs (28.8MHz) and band scannersCalibration source for radio receiversMaster clock for audio and video equipment, DACs and studio recording gear