ADRF6603

Rev. 0 | Page 10 of 24

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

1kHz OFFSET

100kHz OFFSET

1MHz OFFSET

10MHz OFFSET

INTERGRATED PHASE NOISE

10kHz OFFSET

–160

–150

–140

–130

–120

–110

–100

–90

–80

LO FREQUENCY (MHz)

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

2100

2200

2300

2400

2500

2600

Figure 10. PLL Spot Phase Noise at Various Offsets

and Integrated Phase Noise vs. LO Frequency

–110

–105

–100

–95

–90

–85

–80

–75

LO FREQUENCY (MHz)

2100

2200

2300

2400

2500

2600

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 = 2115.2MHz

LO = 2211.2MHz

LO = 2307.2MHz

LO = 2403.2MHz

LO = 2499.2MHz

LO = 2595.2MHz

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

(LO Frequency Varies from 2100 MHz to 2600 MHz)