ADL5322

Rev. 0 | Page 9 of 12

Figure 15 shows how ACP varies with output power level. The

close-in ACP is a function of the signal coding and is unaffected

by output headroom at these power levels. The ACP measured

at 1.98 MHz carrier offset is −72 dBc at 10 dBm output power

(12 dB below the required 60 dBc). At 4 MHz carrier offset, the

noise and distortion measured in a 1 MHz bandwidth is −75 dBm

at 6 dBm (total) output power (0 dBm per carrier). In a 50 dBm

transmitter, this corresponds to an antenna-referred output

power of −31 dBm (1 MHz), which is 18 dB below what is

required by the CDMA2000 standard.

–30

–100

–10

OUTPUT POWER (dBm)

10

–50

–40

–60

–70

–80

–90

–30

–100

–50

–40

–60

–70

–80

–90

–8

–6

–4

–2

0

2

4

6

8

ACP1 (dBc) – 750kHz OFFSET – 30kHz RBW

ACP3 (dBm) – 4MHz OFFSET – 1MHz RBW

ACP2 (dBc) – 1.98MHz OFFSET – 30kHz RBW

Figure 15. CDMA2000 ACP vs. Output Power per Carrier; 4 Adjacent Carriers