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Programmable Multi-frequency Clock Synthesizer Offers System Flexibility

Tue, 07/27/2010 - 10:20am
Expanding on its popular multi-frequency clock synthesizer, Pentek, Inc. announced the release of the user-configurable Model 7191 programmable clock synthesizer PMC module. Like its predecessor, the Model 7190, the new Model 7191 gives designers working with A/Ds and D/As a highly-precise clock source with the added flexibility of custom frequency generation under simple software control.

The Model 7191 achieves its combination of flexibility and performance by using low-noise VCXOs for the fundamental frequency generation. The VCXO output is followed by a clock synchronizer from Texas Instruments to allow synchronization with common frequency reference sources.

The Model 7191 generates four different user-programmable VCXO frequencies, plus four divided versions (by 2, 4, 8 and 16) of each oscillator. Using the provided software, users can freely route up to five different frequencies from this set of 20 choices to the board’s eight buffered 50-ohm outputs.

The user-programmability of the Model 7191 provides arbitrary frequencies to help speed development by providing immediate access to non-standard operating frequencies. Conventional crystal oscillators for custom frequencies often require extremely long lead times.

The device also helps streamline development by being easy to integrate into popular system architectures. The board’s base format is an industry-standard PMC module with 32-bit 33/66 MHz PCI interface, usable on any type of carrier that supports PMC. Pentek also offers this module on simple carriers for PCI, PCIExpress, CompactPCI, VME and VPX form factors.

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