Houston, Tex. VMETRO Inc. has introduced a high-frequency clock generator PMC/XMC module. The XCLK1 module provides up to five phase matched, low jitter, sample clocks for high-speed analog-to-digital converters at rates of up to 2 GHz per channel. The XCLK1 solves the challenge of generating high-speed clock sources in a small, low-cost format suitable for high-performance embedded applications such as SigInt, spectral analysis and RADAR, said VMETRO.
High-frequency analog-to-digital converters require stable, low jitter clock sources, which until now have tended to be bulky, said VMETRO. By shrinking this functionality into a space that can be accommodated by any industry standard PMC or XMC site, multi-channel signal acquisition can now be more cost effective and requires less space, added the company.
The XCLK1 offers the choice of internal or external clock reference sources. The default clock source is an onboard 10-MHz temperature compensated crystal oscillator (TCXO). Local frequency multiplication based on this reference can generate output signals in the range of 500 MHz to 2 GHz with a jitter of less than 0.5 ps. The output clock is available through five single-ended or three differential front panel outputs. Alternatively, the XCLK1 can derive its outputs from an external source; either a front panel RF (0 to 2 GHz) input, 10-MHz front panel reference or 10 MHz from its PMC user I/O connector.
When providing a clock source to multiple acquisition cards, users often need to synchronize the trigger, or start of acquisition for all cards, so that multiple samples are coherent, which is important for applications such as beamforming, said VMETRO. The XCLK1 helps solve this problem by being able to momentarily halt all sample clock outputs using its trigger/reset input. This gives time for all acquisition cards to be reset and to start to capture data synchronously. Releasing all the clock outputs at once ensures that all data flows start together and are in step.
The XCLK1 is a suitable clock source for synchronizing high-speed analog-to-digital converter cards like the recently announced VMETRO AD1500 or AD3000 cards. The XCLK1 is available in both air- and conduction-cooled configurations.
Product information: XCLK1, AD1500 card, and AD3000 card
Pricing: Starts at $4995 for the XCLK1.
VMETRO, 1-281-584-0728, www.vmetro.com