Programmable Dual-Stream PCM Simulator PSIM-200 

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Features

• Independent 2-Channel Simulation
• ½ Size PCI Form Factor
• Integrated IRIG Time Code Output
• Fixed Dynamic Output Capability and
• All IRIG PCM Data Codes
• Operation to 30 Mbps

Introduction

The PSIM-200-001 PCM Simulator provides two identical and independent PCM simulators. Each PCM channel is capable of being independently enabled/disabled and is capable of operating at different clock rates (whether internal or external). The modules support either system CPU-based data transfer or on-board DMA-based data transfer. Each PCM channel can be configured to insert a predefined synchronization word into the data stream at regular intervals as defined by the number of words specified in the programmable frame size. In addition, a single IRIG timecode generator is provided that gives an IRIG B serial time signal. The contents of the sync word and its length (4 to 64 bits) are programmable via software. In addition, the length of the frame (in words) is also programmable. The frame size (in words) can be any value from two words through 256K words. The word size may be programmed from 4 to 32 bits.

The output serial PCM data stream for each channel may be formatted into any one of the following data codes: NRZ-L/M/S, Bi?-L/M/S, DM-M/S, or RZ. Additionally, NRZ-L data is capable of being randomized in either the forward or reverse direction with code lengths of 9, 11, or 15.

Each PCM channel provides an output clock associated with the corresponding data stream. This output clock has a programmable 0° or 180° phase selection.