ADRF6601

–170

–160

–150

–140

–130

–120

–110

–100

–90

Phase noise measurements made at IF output, unless otherwise noted.

–80

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

–

Rev. 0 | Page 10 of 24

LO FREQUENCY (MHz)

750

1150

1100

1050

1000

950

900

850

800

1kHz OFFSET

100kHz OFFSET

1MHz OFFSET

10MHz OFFSET

INTERGRATED PHASE NOISE

10kHz OFFSET

Figure 10. PLL Spot Phase Noise at Various Offsets

and Integrated Phase Noise vs. LO Frequency

–110

–105

–100

–95

–90

–85

–80

LO FREQUENCY (MHz)

750

1150

1100

1050

1000

950

900

850

800

1× PFD OFFSET

2× PFD

OFFSET

4× PFD OFFSET

0.25× AND

0.5× PFD

OFFSET

Figure 11. PLL Reference Spurs vs. LO Frequency

–160

–150

–140

–130

–120

–110

–100

–90

80

1k

10k

100k

1M

10M

100M

OFFSET FREQUENCY (Hz)

LO = 752MHz

LO = 848MHz

LO = 953.6MHz

LO = 1049.6MHz

LO = 1155.2MHz

Figure 12. Phase Noise vs. Offset Frequency and LO Frequency

(LO Frequency Varies from 750 MHz to 1160 MHz)