In RF and microwave communication systems where signal integrity is of prime importance, Phase Locked Loop (PLL) synthesisers offer high levels of frequency stability and accuracy with exceptional phase noise characteristics that allows components in the signal chain to perform at their optimum levels. Pasternack’s latest line of USB-controlled PLL frequency synthesisers can be useful in applications involving signal generators, benchtop test and measurement, electronic warfare and microwave radios.

Pasternack’s six models of PLL frequency synthesisers cover a broad range of frequency bands from 25MHz to 27GHz. The compact and rugged SMA-connectorised designs support a USB 2.0 interface with a PC computer that supplies DC power and GUI command control. Models offer high output power levels that range from 10dBm to 19dBm typical and output attenuation is adjustable up to 50dB in 1dB steps. Phase locked speed is 1ms typical and phase noise is as low as -108dBc/Hz at 100MHz offset.

Additional features include a 50MHz internal frequency source and optional external reference with supplied cable. Frequency resolution can be adjusted using either Integer (default) or fractional modes with resolution to a step size down to 1MHz. Modules support functional LED indicators that confirm a USB connection, phase locking and unlocking, and RF power disable. All models are RoHS- and REACH-compliant, and are classified as EAR99.