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The fundamental output frequency in the range 300 MHz to 14 GHz is generated using either a coaxial resonator or dielectric resonator, depending on the frequency. Applying unique AtlanTecRF PLL technology, it is locked to the TCXO reference to provide stability over a -20 to +70C temperature of better than +/-1 ppm.

Standard TCXO frequencies include 10, 25 & 50 MHz but almost any in-between frequency can be selected to provide the desired output frequency at integral multiples.

The output power of all units is +13dBm minimum as standard, while additional power levels up to +20dB are available as options. Output power stability over temperature is just +/-2dB maximum. Spectral purity performance includes harmonics of -20dBc minimum and typically at -25dBc, spurious of -80dBc and typical phase noise of a 4 GHz unit of -110dBc/Hz at 10 KHz offset.

The internal regulator allows operation from input voltages in the range +11 to +16V and the current draw is less that 300mA. The regulator also deals adequately with any frequency pushing issues, while the RF output will work well into a 2.5:1 VSWR load.

The size of the unit is industry standard at 2.25 x 2.25 x 0.62 inches (57.2 x 57.2 x 15.8 mm) and the RF output connector is SMA female stainless steel. A second SMA output connector is also provided to deliver the reference frequency, if required, to other parts of the user’s system. One other important and standard feature is the TTL lock alarm output via filtered feedthru’ connectors.

It is anticipated that these small, rugged, compact and self-contained units will find applications in a wide variety of satellite communications, defence, research and industrial microwave programmes. Beyond the basic PLO it is possible to specify modular sub-assemblies including amplification, frequency mixing or multiplication and filtering functions as part of a more complex RF/microwave system.