ICE-MBT2
Multi- Band Tuner

BLOCK DIAGRAM

FUNCTIONAL DESCRIPTION

The ICE-MBT2 card is an 8/16/24-channel digital narrow band tuner featuring:

• single input mode (up to 24-channels)
• dual input mode (up to 12-channels on each)
• output to host
• time-code processing

The ICE-MBT2 can be configured with 2, 4, or 6 GrayChip GC4014 processors for 8, 16, or 24 channels of 16-bit digital tuning at up to 65 MHz.

GC4014 Digital Tuners:

Two to Six GrayChip 4014 Digital Tuners provide digital narrow-band tuning on one or two digital input streams. The GC4014s are controlled via the SHARC's data bus with each chip connected to one of six SHARC link ports for high speed data transfer. The 16-bit digital input data can come from the external I/O Module ports or the SHARC link ports. This allows data that is archived on the host (disk or memory) to be processed by the tuners.

Each chip provides 4 channels of tune/filter/decimate processing with factory or user down-loadable filter coefficients.  The decimation can range from16 to 32768, and is the same for all channels on the same chip. The number of active tuners is software programmable using run-time library calls. Each tuner channel requires ~250 mW of power at 65MHz.

Wideband Input:

The tuner chip may be bypassed to acquire the wide-band input directly into the host if desired.  The link ports are shared between wideband and the tuners such that for each 38Mby/sec of wideband input, one tuner chip is unavailable.  See Diagram.

SHARC Processor:

The Analog Devices 21062 SHARC is a high performance 32-bit signal processor for speech, sound, graphics, and imaging applications. The system-on-a-chip architicture operating at 40 MHz features:

• 32-bit IEEE floating point computations (80MFLOPS)
• 256 Kby dual-ported SRAM
• Four serial I/O ports capable of transfering 40Mbits/s each (2 input, 2 output)
• Six bi-directional link ports capable of transfering 40Mby/s each
• Ten simultaneous DMA channels (6 link ports, 2 serial ports, and 2 host/PCI channels)
• Total DMA throughput of up to 240 Mby/s
• Crossbar switch memory connections

I/O Controller:

The Altera FLEX10K20 IOC is responsible for muxing/demuxing 1, 4, 8, or 16 bit data into the 4-bit link port nibbles and
controlling the external I/O Modules. It can also be used to bridge the A and B ports, upsample DDC input data, process digital time
code bits, or other special purpose functions.