Microchip LN-CSAC-SA65 handleiding
Handleiding
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LN-CSAC MODEL
SA65-LN USER’S GUIDE
2024 Microchip Technology Inc. and its subsidiaries DS50003805A-page 15
Chapter 2. Functional Description
The following is a functional description of the LN-CSAC.
2.1 PRINCIPLE OF OPERATION
The LN-CSAC is a passive atomic clock, incorporating the interrogation technique of
coherent population trapping (CPT) and operating on the D1 optical resonance of
atomic cesium. A complete description of passive atomic clocks, CPT, and the
LN-CSAC architecture is beyond the scope of this user’s guide. The following illustra-
tion shows a simplified block diagram of the LN-CSAC.
FIGURE 2-1: Simplified LN-CSAC Block Diagram.
The principal RF output from the LN-CSAC is provided by an evacuated miniature crys-
tal oscillator (EMXO). In normal operation, the frequency of the EMXO is continuously
compared and corrected to the ground state hyperfine frequency of the cesium atoms,
contained within the physics package, which thereby improves the long-term stability
and environmental sensitivity of the EMXO. In addition to the EMXO and the physics
package (Note 1), the essential components of the LN-CSAC are the microwave syn-
thesizer and the microprocessor (Note 2). The microwave synthesizer generates
4596.3 MHz with tuning resolution of approximately 1 × 10
–12
. The microprocessor
serves multiple functions, including implementation of the frequency-lock loop filter for
the EMXO, optimization of physics package operation, state-of-health monitoring, and
command and control through the serial communications port.
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Productinformatie
| Merk | Microchip |
| Model | LN-CSAC-SA65 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 6392 MB |
