MSM7583 Ver la hoja de datos (PDF) - Oki Electric Industry

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MSM7583

π/4 Shift QPSK MODEM

Oki Electric Industry 

¡ Semiconductor

MSM7583

MCK

Master clock input.

The clock frequency is 19.2 MHz.

IFIN1, IFIN2

Modulated signal inputs for the demodulator block.

Select the IF frequency from 1.2 MHz, 10.7 MHz, 10.75 MHz, and 10.8 MHz based on CR0 - B4

and B3. IFIN1 is for Channel 1, and IFIN2 for Channel 2.

IFCK

Clock signal input for demodulator block IF frequency (10.7 MHz or 10.75 MHz).

If the IF frequency is 10.7 MHz, 19.0222 MHz should be supplied. When it is 10.75 MHz, 19.1111

MHz should be supplied. When the IF frequency is 1.2 MHz or 10.8 MHz, set this pin to “0”

or “1”. (Refer to Fig. 2.)

X1, X2

Crystal oscillator connection pins.

When supplying a 19.0222 MHz or 19.1111 MHz clock to IFCK, use these pins. (Refer to Fig. 2.)

When IFIN = 10.7 MHz or 10.75 MHz

When IFIN = 1.2 MHz or 10.8 MHz

MSM7583

X1

X2 IFCK

MSM7583

X1

X2 IFCK

19.0222 MHz or 19.1111 MHz

Figure 2 How to Use IFCK, X1, and X2

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