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XR-2123 - PSK Modulator / Demodulator

Description

This series of devices provide the modulator and demodulator for phase-shifted keyed modulated signals.

The devices have an on-chip digital-to-analog converter, allowing digital external programming of Bell 212A, CCITT V.22 or V.26 functions.

Features

  • Sin.

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Other Datasheets by Exar (now MaxLinear)

Part Number Description
XR-2123A PSK Modulator / Demodulator
XR-2120 PSK Modem Filter
XR-2120A 212A/V.22 Modem Filter
XR-2121 Bell 212A Type Modulator
XR-2122 Bell 212A Type Demodulator

Full PDF Text Transcription

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XR-2123/2123A PSK ModulatorIDemodulator GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAMS This series of devices provide the modulator and demodulator for phase-shifted keyed modulated signals. The devices have an on-chip digital-to-analog converter, allowing digital external programming of Bell 212A, CCITT V.22 or V.26 functions. The XR-2123 provides the modulator and demodulator functions. It is adequate for Bell 212A (1200 BPS only) and Bell 201 standards. The XR-2123 requires a synchronous-to-asynchronous converter and scrambler-descrambler for the digital portion of the modem for 212A applications. Level shifters and filtering is required for the analog portion. The X R-2123A provides the ±7 Hz carrier capture range needed for V.22 and V.26. It is externally identical to the XR-2123.
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