SDI LNFR-100E Manual do Utilizador descarregar pdf (Página 32)

LOW NOISE FREQUENCY REFERENCE, LNFR-100E

FEATURES

• Low environmental sensitivity

• Ultra-low phase noise

• Very low spurious

APPLICATIONS

• Earth station frequency reference

• Phase noise measurements

• Reference frequency generation

• Telecommunications standard

DESCRIPTION

The LNFR-100E is a high performance 10 MHz distributed frequency reference. It contains a 5 MHz SC-cut

ovenized oscillator, a low noise frequency doubler and a distribution amplifier module. The 10 MHz signal is

distributed by the distribution amplifier to provide four 10 MHz outputs on the back panel. Typical

cross-channel isolation is 70 dB and reverse isolation is typically greater than 75 dB. The distribution module

does not degrade the phase noise performance of the oscillator that is typically –142 dBc/Hz @ Fourier

frequency of 10 Hz and –168 dBc/Hz @ Fourier frequency greater than 10 kHz. The LNFR-100E outputs are

matched to 50 ohms to obtain better than 25 dB return loss. The LNFR-100E can be phase locked via an

electrical tuning port or by providing an external 10 MHz reference.

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

www.spectradynamics.com

PARAMETER CONDITIONS MIN TYP MAX UNITS

Output level 50 ohm load +11 +14 +15 dBm

Output impedance return loss @ 10 MHz -25

Harmonic distortion 50 ohm load

-40 -38 dBc

Isolation output to output 60 70

Temperature stability 0 - 50 ºC

+/- 5x10

-9

Mechanical tuning

+/- 1x10

-6

Electrical Tuning +/-5VDC

+/- 2x10

-7

Stability

Allan variance τ=1s

1E-12

Phase noise @ 10 MHz 1 Hz

10 Hz

100 Hz

1 kHz

10 kHz

-112

-142

-160

-167

-170

-109

-138

-156

-165

-166

dBc/Hz

Spurious

- -120 -110 dBc

SPECIFICATIONS

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 59 60

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