Accession Number:

ADA191049

Title:

Tactical Rubidium Frequency Standard (TRFS).

Descriptive Note:

Final technical rept. Oct 83-Jul 86,

Corporate Author:

LITTON SYSTEMS INC WOODLAND HILLS CA GUIDANCE AND CONTROL SYSTEMS DIV

Personal Author(s):

• Kwon, T.
• Hahn, T.
• Dagle, R.
• Horst, J.
• McClelland, T.

Report Date:

1987-09-01

Pagination or Media Count:

97.0

Abstract:

The primary objective of this contract was to design, develop, fabricate, test and evaluate pre-production models PPM of a Tactical Rubidium Frequency Standard TRFS that will meet the tactical temperature - vibration environment specifications. Innovative design has resulted in TRFS that meets the environmental requirements as well as small size, rapid warm-up, and low power consumption. To meet the vibration specification under wide temperature variations, an SC-cut voltage-controlled crystal oscillator VCXO having a minimum acceleration sensitivity of 4 x 10th minus 10th powerg was mounted on an internal wire-suspended vibration isolator. The VCXO output frequency of 10 MHz is tightly controlled by a servo loop with a 100 Hz bandwidth. The rubidium resonnance signal is detected by a phase-sensitive technique using sinusoidal modulation. Five multilayer PC boards are used along with discrete components. The TRFS will mount directly onto a platform without external vibration isolators. Keywords TRFSTactical Rubidium Frequency Standard, Physics package, Wire-suspended isolator, VCXO, Servo loop, and Sinusoidal modulation.

Descriptors:

• *ACCELERATION
• *FREQUENCY STANDARDS
• *RUBIDIUM
• *VIBRATION
• ENERGY CONSUMPTION
• ENVIRONMENTS
• EXTERNAL
• HEATING
• LOOPS
• LOW POWER
• MODELS
• PRODUCTION
• REQUIREMENTS
• SENSITIVITY
• SERVOMECHANISMS
• SPECIFICATIONS
• TEMPERATURE
• VARIATIONS
• VIBRATION ISOLATORS

Subject Categories:

• Test Facilities, Equipment and Methods
• Atomic and Molecular Physics and Spectroscopy
• Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE