Sony CXD1958Q
The CXD1958Q is an integrated TCM/QAM demodulator for MMDS systems using the DAVIC MMDS standard. This highly integrated device incorporates an internal 8-bit ADC, image rejection and root-raised cosine filters, all-digital symbol timing recovery PLL, adaptive decision feedback equalizer (DFE) with 10 feedforward and 30 feedback taps, 4-D TCM decoder, and DAVIC/DVB compliant forward error correction comprising (204,188) Reed Solomon decoder, a programmable de-interleaver with I = 12 and I = 204, and a de-randomiser.| Part No. | CXD1958Q |
|---|---|
| Datasheet | CXD1958Q Download |
| Manufacturer |  Sony |
| Description | MMDS TCM/QAM Demodulator + FEC + ADC |
| Buy | Stock & Price |
DESCRIPTION
All internal clocks are generated from a single external 30MHz reference crystal. Device functionality also includes 3-wire bus interface for configuring up to 2 tuner synthesizers, a sigma delta tuner IF-AGC output, a user programmable RFAFC sigma delta output, spectrum inversion of the received signal for tuner compatibility, and a highly configurable MPEG2-TS interface. An I2C bus interface provides on-board configuration and status monitoring of various functions including access to the equalizer tap values and constellation points. JTAG provides boundary scan test compatibility.FEATURES
● DAVIC MMDS V1.1 and V1.3 compliant● Supports 16, 64 and 256QAM
● Supports 16, 64 and 256 TCM
● Internal 8-bit ADC
● Interface for 10-bit external ADC
● 36.125MHz nominal IF input
● Symbol rate range 5 – 5.304Mbaud in 6MHz channels
● Integrated matched filtering with 0.15 roll-off factor
● ±400KHz internal carrier offset compensation with negligible losses @ 5Mbaud 6MHz channel
● Symbol timing loop designed to acquire with large offsets.
