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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 CS-1, 9.192 GHz Frequency Synthesizer 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 signals. 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 FS100-RM Manual de usuario Pagina 42