Philips TDA5051A Manual do Utilizador descarregar pdf (Página 10)

Product data sheet Rev. 5 — 13 January 2011 10 of 29

NXP Semiconductors

TDA5051A

Home automation modem

Resolution bandwidth = 9 kHz; top: 0 dBV (RMS) = 120 dBμV (RMS); marker at

−5dBV(RMS)=115dBμV (RMS); the CISPR16 network provides an attenuation of 6 dB,

so the signal amplitude is 121 dBμV (RMS).

Fig 3. Carrier spectrum

Resolution bandwidth = 100 Hz; B

−20dB

= 3000 Hz (2 × 1500 Hz).

Fig 4. Shaped signal spectrum

Fig 5. AGC time constant definition (not to scale)

002aaf054

f (Hz)

−60

−40

−80

−20

o(rms)

(dBV)

−100

132.5 kHz

f (kHz)

117.5 147.5

002aaf057

−40

−30

−50

−20

−10

dBV

(RMS)

−60

132.5

20 dB

1500 Hz

002aaf05

RXIN

(I)

8.68 dB

AGC range

c(AGC)

(AGC time constant)

+30 dB

−6 dB

AGC

modulated sine wave 122 dBμV amplitude

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 28 29

TDA5051A 1

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