PLL synthesisers offer high levels of frequency stability

10th January 2017

Alice Matthews

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A new line of USB-controlled Phase Locked Loop (PLL) frequency synthesisers has been launched by Pasternack. In RF and microwave communications systems where signal integrity is of prime importance, PLL synthesisers offer high levels of frequency stability and accuracy with phase noise characteristics that allows components in the signal chain to perform at their optimum levels.

These PLL synthesisers can be useful in applications involving signal generators, benchtop test and measurement, electronic warfare and microwave radios.

Pasternack’s six new 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 10-19dBm typical, and output attenuation is adjustable up to 50dB in 1dB steps. Phase locked speed is 1msec 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.

“Pasternack’s six new models of USB-controlled PLL Frequency Synthesisers offer a wealth of desirable features for designers and are ideal for test and measurement applications. Each model comes complete with accessory cables, downloadable user manual and command control software that’s ready to ship direct from stock with no MOQ,” said Tim Galla, Active Component Product Manager, Pasternack.