Download PRESS RELEASE (No - IQD Frequency Products

PRESS RELEASE
4TH JUNE 2013
(No. 418)
FOR IMMEDIATE RELEASE
New high frequency OCXO from IQD delivers class
leading phase noise performance down to -172dBc/Hz
Launching at IMS 2013, IQD’s new IQOV-200 series Oven Controlled Crystal Oscillator (OCXO) has been
designed from the ground up to optimise low phase noise performance. Phase noise is caused primarily by
semiconductor thermal noise but noisy resistors, capacitors and inductors can all have an effect, as can poor
signal transfer paths due to circuit layout and design. Good oscillator design consideration allow the IQOV-200
series to deliver phase noise performance of -172dBc/Hz at 100kHz offset and -160dBc/Hz at 1kHz offset
based on a nominal oscillating frequency of 100MHz.
Available at any frequency in the range 80MHz to 130MHz, the new model is initially housed in an industry
standard 36 x 27mm IEC C008 Euro package although other package styles including surface mount variants
can be considered to suit specific customer applications. The oscillator nominally operates from a 12 Volt
power supply and consumes just 1 Watt of power at steady state, incorporating a very high level of internal
voltage regulation so proving somewhat immune to external voltage variations. Drive capability is quoted at
+6dBm into 50 Ohms.
Operating over a standard temperature range of -20 to 60 degrees C with an initial frequency stability of
±50ppb (parts per billion), other temperature ranges and stabilities can be considered as required. The key
component within any quartz oscillator is the quartz crystal and the IQOV-200 series’ long term aging rates are
particularly low due to the very high quality and processing of the quartz crystal. IQD’s German based high
specification division IQD FOQ GmbH where the new model was designed, has the critical advantage of close
integration between the single site in-house crystal and oscillator design and manufacturing departments. The
new model incorporates a SC-cut (Stress Compensated) HC43 cold welded crystal as exhaustive research has
shown that this style of package offers much less stress on the crystal than the more commonly used multiple
mounting point systems. This has a direct effect in improving the oscillator’s close-in phase noise. The actual
drive circuitry has its most direct influence on the far-out phase noise performance. Inevitably both aspects are
somewhat interactive so a fine engineering balance has to be struck.
There are many potential applications for this high specification OCXO including ground and airborne radar
equipment (both military and commercial); military digital communications systems; satellite communications
such as ‘Very Small Aperture Terminal (VSAT) – for data transfer from a remote ground terminals to high
orbiting satellite such as the Inmarsat system with minimal distortion; high performance Global Positioning
Systems (GPS); phase locked microwave signal sources and frequency synthesisers and signal generators.
Phase noise or phase jitter is of particular importance because it reduces the signal quality and hence
increases the bit error rate of a communications system. Indeed, in complex communications systems the
amplitude noise caused by high signal levels is often of less importance than the phase noise content. While
phase noise is an unwanted addition to all signals, its presence must be accounted for in many applications.
Phase noise is an important aspect of synthesiser design as a further example and levels of phase noise must
therefore be considered at the earliest design stages.
Test equipment is another key application for the IQOV-200 series. A very clean signal source is required for
the reference source since any fluctuations will manifest themselves as side bands on the main signal and
since the test equipment is the reference then in simplistic terms you will not actually measure what you think
you are measuring.
Further details will be available at IQD’s booth no. 137 at IMS 2013.
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Notes for Editors:
Backed by a pedigree that has been developed over nearly 40 years, IQD Frequency Products is a recognised market
leader in the frequency control market. We have operations in America, Asia and Europe including our specialist high
performance product manufacturing division, IQD FOQ GmbH in Germany. With active customers in over 60 countries, IQD
offer one of the most comprehensive frequency product ranges available, from low cost commercial grade product to that
used in high reliability military and professional grade applications. Our range includes Quartz Crystals, Crystal Oscillators,
Fast Make Oscillators, VCXOs, TCXOs, OCXOs, Automotive Crystals & Oscillators to AEC-Q200 & TS16949 release,
Crystal Filters, Real Time Clock, SAW Filters and VCOs & Synthesisers.
Quality and customer service are the cornerstones of our success and we are absolutely focussed on consistently meeting
and exceeding customer expectations. We take a partnership approach to working with our customers. Our experienced
multilingual Sales and Application Support teams guide customers from design stage through to full production.
IQD’s products are specified by leading manufacturers in the aerospace, automotive, communications, computing,
consumer, industrial, medical and military industries throughout the world. We work with several premier chip-set designers
on a variety of key projects and hold approvals on a number of products including high specification oscillators. Our full
range of products is available direct from all of our offices or via our extensive worldwide distribution and representative
network. Full contact details are available on our website at www.iqdfrequencyproducts.com.
Further information:
Harriet Charles
IQD Frequency Products Ltd
T: +44 (0)1460 270200
E: [email protected]
W: www.iqdfrequencyproducts.com
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