Product category:
Frequency Control Components
News Release from: Aspen Electronics | Subject: Herley-CTI Series
Edited by the Electronicstalk Editorial
Team on 13 December 2005
Oscillators promise high-reliability
comms
Herley-CTI Series phase-locked dielectric resonator oscillators are designed for high-reliability cost-critical applications, suiting both satellite and microwave communications systems.
Herley-CTI Series phase-locked dielectric resonator oscillators (PDROs), available in the UK from Aspen Electronics, are designed for high-reliability cost-critical applications, suiting both commercial and military, satellite and microwave communications systems Key features of the PDROs are their small sise, extremely low phase noise, lack of subharmonics and high efficiency, achieved by taking advantage of advanced GaAs MESFET and BJT DRO technology, combined with the standard unit's ability to phase-lock to an external reference, in the 50 to 300MHz range
This article was originally published on Electronicstalk on 25 May 2004 at 8.00am (UK)
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The first features an integrated, high stability, internal crystal oscillator.
The second is a dual loop design that is phase locked to an external frequency standard between 5 and 15MHz.
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All models use digital synthesis techniques that allow the output frequency to be phase locked to an integer or fractional multiple of the reference used.
The dual loop version appeals particularly to the satellite communications sector, where users will typically require to lock on to the supplied 10MHz reference signal.
Operating from 12 or 15V DC power supplies (8V optionally available), the oscillators feature very low power consumption.
Output power is +15dBm, with the units also offering low current levels.
The low profile devices in the series are particularly compact, with overall dimensions of just 50.8 x 47.8 x 15.7 or 50.8 x 50.8 x 18.5mm depending on frequency and standard or flush tuner selection.
The XPDRO Series of dual loop versions are only slightly larger, at 57 x 57 x 15.75mm.
Both the PDRO and XPDRO are available in the frequency range 3 to 45GHz.
The PDROs are ideal for outdoor use as they feature a wide operating temperature range of -40 to +75C.
The devices are particularly suitable for use as local oscillators in up/down convertors for both commercial and military satellite communications systems.
Military versions are hermetically sealed, operating in the extended -45 to +85C range, with field replaceable SMA connectors.
Other applications include microwave communications systems and test equipment.
Aspen Electronics stocks the most popular devices, typically standard, external reference (50MHz) units operating at 4.9, 6.3, 6.95, 10.75, 12.8 and 13.05GHz.
Other more specialised versions can be shipped from Herley-CTI's US factory in 4 to 8 weeks.
Units cost from GBP 500 to GBP 1000, depending on specification and volumes required.
The devices are RoHS compliant and are covered by a three-year warranty.
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