SDI LNFR-100E Manual do Utilizador descarregar pdf (Página 34)

LOW NOISE FREQUENCY REFERENCE, LNFR-400

FEATURES

• External 5 MHz/DC tuning

• Low environmental sensitivity

• Ultra-low phase noise

• Very low spurious: -100 dBc

APPLICATIONS

• Atomic frequency standards

• Phase noise measurements

• Reference frequency generation

• Telecommunications standards

DESCRIPTION

The LNFR-400 is an ultra-low noise frequency reference. The

device can be used as a low noise source in phase noise

measurement systems. Other applications include high stability

frequency synthesizers, reference frequency generation and

frequency synthesis chains for atomic standards. The

LNFR-400 contains 5 MHz and 100 MHz ultra-low noise

ovenized oscillators. The outputs at 10 MHz, 20 MHz, 40

MHz and 80 MHz are obtained by multiplying the signal from the

5 MHz oscillator. The 100 MHz oscillator is phase locked to

the 5 MHz oscillator to provide a lower phase noise signal inside

the bandwidth of the phase-locked loop. The output of the 100

MHz oscillator is doubled to obtain 200 MHz and doubled

again to obtain 400 MHz. All outputs to the front panel are

buffered with low noise isolation amplifiers. The LNFR-400 can

be phase locked via a +/- 5 VDC tuning signal or with a 5 MHz

1 VRMS signal. The synthesizer is offered in a stand-alone

rack-mount package. For frequency synthesis chain

applications the synthesizer is available in modular form.

SpectraDynamics, Inc. ● 1849 Cherry Street Unit 2, Louisville CO, 80027 ● Phone (303) 665 1852 ● Fax (303) 604 6088

www.spectradynamics.com

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SDI LNFR-100E Manual do Utilizador Página 34