Am79D2251

25

Spurious Out-of-Band Signals at the Analog Output

With PCM code words representing a sine wave signal in the range of 300 Hz to 3400 Hz at a level of 0 dBm0 applied

to the digital input, the level of the spurious out-of-band signals at the analog output is less than the limits shown below.

With code words representing any sine wave signal in the range 3.4 kHz to 4.0 kHz at a level of 0 dBm0 applied to

the digital input, the level of the signals at the analog output are below the limits in Figure 13. The amplitude of the

spurious out-of-band signals between 3400 Hz and 4600 Hz is given by the formula:

Frequency

Level

4.6 kHz to 40 kHz

–32 dBm0

40 kHz to 240 kHz

–46 dBm0

240 kHz to 1 MHz

–36 dBm0

A14

–

14

π f4000

–

()

1200

----------------------------dBm0

sin

–

=

0

–10

–20

–30

–40

–50

–28 dB

–32 dB

ISLAC Device Specification

Frequency (kHz)

3.4

4.0

4.6

19256A-013

Level (dBm0)

Figure 13. Spurious Out-of-Band Signals