Shown here is an example of phase noise plot taken on the 8V97053. This example shows a phase noise plot taken at 700 MHz, which would be a GSM900 frequency for the Local Oscillator when using an intermediate frequency after the mixer of about 200 MHz on the Rx path. The phase noise performance is very good and offers an upgrade compared to similar devices from other manufacturers, up to 10 dB better. The spurious performance is excellent with typical spurious level around -85 dB to -90 dB. Even integer boundary spurs remain up to 30 dB lower than competing similar devices. In addition to best in class spurious performance, the device offers a choice of four different DSM (Delta Sigma Modulator) engines giving even more flexibility to reduce or eliminate spurs. In this example, the loop bandwidth is set around 20 to 30 kHz, and the close in phase noise will change depending on the loop bandwidth. The lower the loop bandwidth the further to the low offsets the device will track the VCO contribution to the noise, and therefore the close in phase noise may appear higher. When increasing the loop bandwidth, the input reference will contribute more to the close-in phase noise.