SDI LNFR-100E Manual de usuario descargar pdf (Pagina 36)

9.192 GHz FREQUENCY SYNTHESIZER, CS-1

FEATURES

• Output signals:

5 MHz, 10 MHz, 100 MHz, 7 MHz, 9.2 GHz, 9.192 GHz

• Synchronization capabilities with external events:

Amplitude modulation

Frequency sweeps

Phase modulation

• Low phase noise

• State machine operation

APPLICATIONS

• Atomic frequency standards

• Atomic time scales

• Reference frequency generation

DESCRIPTION

The Synthesizer Module is a high stability and high resolution signal source designed to be used in the

implementation of a Cesium atomic clock. The CS-1 is provided as two separate modules, the Synthesizer

Module and the DC power module. Both modules come in a 2U, 19 inch rack-mount enclosure. All

synthesizer functions are accessed from the front panel or a RS232 interface. An external trigger input may

be used to synchronize programmable events such as frequency sweeps, phase modulation and amplitude

modulation with external events. The synthesizer is implemented with a flexible modular topology.

Two ultra-low noise quartz oscillators are part of the multiplication chain from 5 MHz to 100 MHz. Buffered

outputs are provided at the front panel for 5 MHz, 10 MHz and 100 MHz. The 100 MHz signal is the highest

frequency in the low frequency section of the synthesizer. This 100 MHz signal is distributed using a one

input, four output isolation amplifier. One of these 100 MHz signal is used as the reference for a 9.2 GHz

DRO. The output of the 9.2 GHz DRO is buffered and used to drive the LO port of a single-sideband mixer.

The second 100 MHz signal is used to clock a DDS synthesizer module. The DDS synthesizer generates an

IF signal with 48 bit resolution and complete modulation capabilities. The DDS synthesizer output drives the

IF port of the single-sideband mixer. The lower sideband of the mixer is selected as the output generating the

9.XXX GHz output signal. The amplitude of the 9.XXX GHz output is controlled with 12 bits of resolution and

an internal relay may be used to turn off the RF signal.

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 de usuario Pagina 36