• Phase Locked Oscillators with an external 10MHz reference


    Dielectric resonator
    5 MHz or 10 MHz external reference
    Phase lock indicator alarm
    Low phase noise
    MIC and SMT fabrication
    Low microphonics
    Low power consumption
    Up to +25 dBm output power
    Available from 1 – 50 GHz
    Optional extended temperature range from -55ºC to +105ºC


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    Part Number: PLO-4000 Categories: ,


    PLO-4000 series Phase Locked Dielectric Resonator Oscillator (PLDRO) utilizes state-of-the-art MIC and SMT to provide crystal stability at microwave frequencies up to 50 GHz. The low profile and rugged construction provide excellent durability against harsh environmental conditions. This model works with external reference of 5 or 10 MHz.

    PLO-4000 series oscillator is designed using FET or BJT amplifier with series feed back at source and Dielectric Resonator at the gate. High gain, low-noise FETs/BJTs are biased negatively at the gate to ensure minimum phase-noise. The device is carefully matched for maximum power, minimum phase-noise and Voltage Standing Wave Ration (VSWR). The oscillator is matched for maximum temperature stability and optimum negative resistance.

    PLO-4000 series oscillator is buffered by cascaded low-noise driver and power amplifiers for minimum load pulling, maximum isolation and power. FET/BJT devices are directly attached to gold plated Kovar carriers to minimize shear effect and maximize heat sinking. Kovar carriers are mounted to the chassis to provide an efficient thermal junction and a stable structure for reduction of microphonics. To ensure oscillator stability over the full temperature range, the tuning elements are precisely designed and positioned to compensate for temperature drift by a factor of three.

    PLO-4000 series proprietary Phase lock loop and Internal Multiplier circuitry uses Surface Mount Technology. The reference frequency is multiplied and sampled to output frequency. Produced error voltage due to frequency drift is sensed by a Wein-Bridge Oscillator to provide the necessary sweep voltage to an ultra Hi-Q tuning varactor diode for the purpose of compensation and phase locking. The unique construction of phase lock loop sub-assembly provides excellent temperature stability and minimum solder joints for maximum reliability.

    PLO-4000 series is internally voltage regulated to avoid reverse bias, frequency pushing, bias modulation and voltage transients. A phase lock indicator alarm of TTL type is provided as a feature. The PLO-4000 series are externally reference locked and factory tuned to specified frequency. Mechanical frequency adjustment is provided for optimum phase voltage setting. Buffered Reference Monitor and adjustment are standard features of this Hi-Tech oscillator.


    Satellite communications
    Cable TV links (CATV)
    Local Area Networks (LAN)
    Global Position Systems (GPS)
    Test equipment
    Point to Point communication
    Up/Down converters
    Transmitters & Receivers
    Digital radios
    Missile guidance
    Military, Space, and Commercial

    Additional information

    Single Frequency

    1.00 to 50.00 GHz

    Power Output

    =+13 dBm, up to +25 dBm Optional

    Load VSWR

    2.0 : 1.0


    -25 dBc


    -80 dBc

    Phase Noise

    See Phase Noise Envelope

    Frequency Stability

    Frequency Stability

    Operating Temperature

    0º to +50ºC STD, -55º to +105ºC OPTIONAL

    Storage Temperature

    -55 ºC to + 100ºC