GPS Disciplined Reference Oscillators

LBE-1420 GPS Locked Clock Source 1 Hz to 1.1 GHz output

An upgraded version of the popular 1 Port Mini GPSDO by Leo Bodnar Electronics

  • Programmable Frequency 1 Hz - 1.1 GHz

  • Stability 0.01 ppb 1E-11 <60 sec Locktime

  • 1 SMA Output Connector

  • Ideal for use with SDR Receivers

The LBE-1420 GPSDO can be used as an Universal Reference Clock for most other Instruments and Applications which up to now would require a bulky and expensive Rubidium Clock.

SDR-Kits recommends the Leo Bodnar GPSDO modules as the ideal frequency standard for supplying an external reference clock signal to the DG8SAQ Vector Network Analyzer to make Frequency and Frequency Difference measurements with accuracy  approaching 1e-10 and frequency  measurements (dF) in the mHz (milli Hertz) and even down to the uHz (micro Hertz) region.

Also, the LBE-1420 can be used as an external clock for the SDRplay RSPdx, RSPduo, RSP2 or RSP2pro with our GPSDO - RSP2 External Clock Cable

The LBE-1420 offers:

  • Long term stability of output signal is defined by high accuracy of GPS Caesium references and approaches 1x10-12

  • Short term signal quality is defined by internal TCXO clock source providing high-quality, low phase noise clock signal with sub-picosecond RMS jitter.

  • Digital PLL allows main output reference frequency to have almost any value between 1 Hz and 1.1 GHz.

  • Output signal is a square wave at 3.3V CMOS levels with 50 Ohms characteristic impedance.

  • Output power level (measured at 10MHz, fundamental power channel): +10.3dBm

    Typical phase noise at 10MHz output:

  • 70 dBc/Hz at 1 Hz
  • 100 dBc/Hz at 10 Hz
  • 125 dBc/Hz at 100 Hz
  • 145 dBc/Hz at 1 kHz
  • 150 dBc/Hz at 10 kHz
  • 153 dBc/Hz at 100 kHz
  • 155 dBc/Hz at 1MHz
  • Power draw through 5V USB is 250mA.

Operation requires presence of GPS signal, however temporary loss will be tolerated seamlessly. Active or passive antennas are supported. An active antenna with 5 metre cable is provided with the device but can be substituted if necessary. GPS acquisition time after power-up is around 30 seconds. If GPS signal is lost, digital PLL will maintains best estimated output frequency based on historical data. On reacquisition of GPS lock, output is seamlessly brought back in sync with GPS reference. Entry and exit of frequency hold is glitch-less.

Frequency setting is configurable via USB connection from Windows PC.

GPS clock can be powered via USB-C connector from a PC, USB phone charger or USB power bank. USB connection to Windows PC is required only for one-off configuration. All 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 they have analogue LNA inside that is not sensitive to power level.

How to make high accurate precision frequency with the VNWA Thanks to Kurt Poulsen for preparing this report and sharing his expertise.

How to set up the Mini GPSDO as an External Clock Reference for the VNWA 3EC:  Guide to setting up Mini GPSDO as external reference clock, instead of internal VNWA TCXO when taking VNWA measurements.

         Contents:      

        -Mini Precision GPSDO Module (69mm x 40mm x 12mm 0.04 kg)

        -GPS Magnetic Antenna with 5m Coax Cable and fitted SMA male plug

        -USB-C Cable

        -12 month Mfg Warranty

          -Mfg Product Support info

       Accessories also available from SDR-Kits:

      SDR-Kits is an Authorised Distributor for the Leo Bodnar Ltd Precison GPSDO Reference Oscillator

      Also available from our Authorised Distributor for Japan: ICAS Enterprises  www.ICAS.to 

      £113.95, incl VAT: £136.74

      Indicative prices in EURO: €133,32, incl VAT: €159,99

      Indicative prices in USD $144.72

      Low Jitter Precision GPSDO Reference Oscillator (2 Port)

      Precision Frequency Clock for the VNWA 3EC, SDRplay RSPdx and RSPduo, plus many other applications

      • Programmable Frequency 450 Hz - 800 MHz  

      • Stability 1 ppb 1E-9 <60 sec Locktime  

      • 2 BNC Outputs

      • Complete with storage case and GPS Antenna


      Manufacturered by Leo Bodnar LTD, the Low-jitter GPS-Locked Precision Frequency Reference Oscillator can be programmed to two output frequencies between 450 Hz up to 800 MHz with a stability of better than 1e-9 (1 part per billion (ppb) within 1 minute after achieving lock to the high accuracy GPS Satellite Network which is controlled by a Caesium Clock with accuracy approaching 1e-12

      USB powered, this instrument is the ideal frequency standard for supplying an external reference clock signal to the DG8SAQ Vector Network Analyzer to make Frequency and Frequency Difference measurements with accuracy  approaching 1e-10 and frequency  measurements (dF) in the mHz (milli Hertz) and even down to the uHz (micro Hertz) region.

      Light and portable, the  Precision GPSDO Reference Oscillator can be used as an Universal Reference  Clock for most other Instruments and Applications which up to now would require a bulky and expensive Rubidium Clock.

      • Two synchronised low-jitter reference clocks locked to GPS signal, Digital PLL allows main output reference frequency to have almost any value between 450Hz and 800MHz.

      • Two outputs can be individually enabled and set to different frequencies. Second output frequency depends on the first output. If both outputs have the same frequency their relative shift can be adjusted. This can be used, for example, to generate two signals with 90° phase shift for use in I/Q mixer.

      • Both output signals are at 3.3V CMOS levels with 50 Ohms characteristic impedance. Their output drive levels can be adjusted.

        Output power level (measured at 10 MHz, fundamental power channel):
        +13.3dBm, drive setting 32mA
        +12.7dBm, drive setting 24mA
        +11.4dBm, drive setting 16mA
        +7.7dBm, drive setting

        • Short term signal quality is defined by internal 0.5 ppm TCXO clock source providing high-quality, low phase noise clock signal with sub-picosecond RMS jitter
        • USB Powered or +5V External PSU.  Current drawn:  Max: 0.27 Amp

        How to make high accurate precision frequency with the VNWA Thanks to Kurt Poulsen for preparing this report and sharing his expertise.

        How to set up the GPSDO as an External Clock Reference for the VNWA 3EC:  Guide to setting up GPSDO as external reference clock, instead of  internal VNWA TCXO when taking VNWA measurements.

        Download GPSDO Calculator for setting two frequencies  - Calculates config setup if a particular combination of 2 frequencies is supported.  

        Linux Support:  A  Linux Configuration Application is available from https://github.com/hamarituc/lbgpsdo

             Contents:

            -Precision GPSDO Module (100mm x 60mm x 27mm 0.13 kg)

              -GPS Magnetic Antenna with 5m Coax Cable and fitted SMA male plug

             - USB Cable A to Mini B

                -12 month Mfg Warranty

                  -Mfg Product Support info

                  Accessories also available from SDR-Kits:

                        SDR-Kits is an Authorised Distributor for the Leo Bodnar Ltd Precison GPSDO Reference Oscillator

                        Also available from our Authorised Distributor for Japan: ICAS Enterprises  www.ICAS.to 

                        £169.95, incl VAT: £203.94

                        Indicative prices in EURO: €198,84, incl VAT: €238,61

                        Indicative prices in USD $215.84


                        Comparison Chart - GPS Disciplined Reference Oscillators


                        Feature                                                                      

                        LBE-1420 GPS Locked Clock Source (One Output)                                            

                        Standard GPSDO (Two Output)

                        Stability

                        +1E-11 within 1 min after GPS Lock

                        +1E-9 within 1 min after GPS Lock

                        Frequency Range

                        1 Hz – 1.1 GHz programmable

                        400Hz – 810MHz programmable

                        Reference Clock Outputs and Connector Type

                        1 SMA Output Connector max 30mA 3.3V

                        2 BNC Outputs programmable independently with restrictions

                        Output Level

                        +11 dBm

                        4 step programmable +7.7 +13.3 dBm

                        USB Power Supply

                        USB-C Connector

                        USB 5V max 250mA

                        5V USB-cable to PC or 5V Charger

                        External Power Supply

                        Not available

                        Ext DC +5V - 15VDC Power connector fitted

                        Dimensions

                        69mm x 40mm x 12mm 0.04 Kg

                        110mm x 60mm x 25mm 0.14 Kg

                        Package Contents

                        LBE-1420 GPS Locked Clock Source module, GPS Antenna, USB Cable

                        Standard GPSDO, GPS Antenna, USB Cable

                        Typical Application

                        Clock Source for applications requiring a single Reference Clock

                        Ham Station Reference Clock Source 10 MHz for Test equipment and 24 MHz for RSP1 or K3 or other Rig


                        GPSDO Page

                        :< 1ppb GPSDO stability
                        GPS Antenna A1575 with 10m RG58 Cable for 1575.4 MHz GNSS for permanent Use

                        GPS Antenna A1575 with 10m RG58 Cable for 1575.4 MHz GNSS for permanent Use

                        £33.50 incl VAT: £40.20

                        Indicative prices in EURO €39,19

                        Indicative prices in USD $42.54

                        GPSDO - RSPdx, RSPduo, RSP2 or RSP2Pro External Clock-in Cable

                        GPSDO - RSPdx, RSPduo, RSP2 or RSP2Pro External Clock-in Cable

                        £6.25 incl VAT: £7.50

                        Indicative prices in EURO €7,31

                        Indicative prices in USD $7.94

                        GPS Antenna 5m Long SMA Plug

                        GPS Antenna 5m Long SMA Plug

                        £16.00 incl VAT: £19.20

                        Indicative prices in EURO €18,72

                        Indicative prices in USD $20.32

                        RG223 20cm Coax Cable with BNC plug to SMA plug connectors (GPSDO - VNWA Ext Reference Cable)

                        RG223 20cm Coax Cable with BNC plug to SMA plug connectors (GPSDO - VNWA Ext Reference Cable)

                        £7.50 incl VAT: £9.00

                        Indicative prices in EURO €8,77

                        Indicative prices in USD $9.52