LBE-1420 GPSDO Locked Clock Source | Single Port
Leo Bodnar Electronics
$172.00
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Leo Bodnar Electronics
LBE-1420 GPSDO Locked Clock Source | Single Port
The Leo Bodnar GPSDO locked clock source is a cost-effective and simple mechanism to stay on frequency.
This clock outputs a low-jitter reference signal frequency-locked to GNSS (GPS). High accuracy GNSS-based cesium 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.
Performance against an SRS FS725 rubidium standard shows comparable short and mid term stability with superior long term stability.
Should I buy the single or dual port version?
Buy the LBE-1421 (dual-port)unless your budget will not permit. Once you are into precision timing, inevitably you are going to want its timepulse capability. The LBE-1420 single port provides one programmable output, (e.g., 10MHz reference). The LBE-1421 allows you drive a second signal at the same or different frequency and convert output one to a 1 pps timepulse. Digital PLL enables many output reference frequencies between 1 Hz and 1.1 GHz. The output signal is a square wave at 3.3 V CMOS levels with 50 O characteristic impedance.
The SMA | USB-C form factor case is approximately 2 1/4" x 1 1/2" x 5/8". Includes an active GPS antenna (5m length with magnetic base) but supports other active or passive antennas. Also includes USB cable for power and initial configuration.
Upgrades
- Incorporate the clock into another chassis or design with a mounting bracket.
- Improve performance and create a sine waveform with a 10 Mhz Low Pass Filter
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. Operation requires a GNSS signal tolerant of temporary loss with acquisition time of 30 seconds. If the signal is lost, digital PLL maintains the estimated output frequency based on historical data. On reacquisition of lock, output is seamlessly brought back in sync with the GNSS reference. Frequency and output settings are configurable via USB connection. Firmware updates and Windows configuration software is available online.
A MacOS app is on the Apple App Store and a Linux utility is available at GitHub. The clock can be powered via USB from computer, charger or power bank. USB connection to a 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. Many active antennas work within a wide range - 2.5v to 5v because internal analog LNA is not sensitive to power level.
For Icom IC-9700 owners, the High Stability Kit option bundles a Reference Injection Board and 0.3m SMA male-to-male cable with an LBE-1420 single port clock.
