Time and Frequency MeasurementsPM/AM Noise Measurement SystemsTechnical Contact: Trudi Peppler Please contact the technical staff before shipping instruments or standards to the address listed below. Mailing Address:
Fees are subject to change without notice. back to top of page | back to index of time and frequency measurements Tests of RF PM/AM Noise Measurement Systems: On Site Tests (77135C)NIST provides a calibration service of the noise floor and performance of PM and AM noise measurement systems at the customer's site using NIST's portable PM/AM noise standard for carrier frequencies of 5 MHz, 10 MHz, and 100 MHz. The PM/AM noise standard produces two signals with approximately 10 dB to 15 dB power (relative to 1 mW). The residual PM noise between the two outputs (relative to 1 rad 2 /Hz) is typically less than -90 dB for a frequency offset from the carrier of 100 kHz for the three rf carrier frequencies. The calibrated PM or AM noise is typically constant with Fourier frequency offset to +0.1 dB out to 3 % of the carrier frequency. After each calibration a calibration report is issued which certifies that the specific measurement system is traceable to NIST for PM and/or AM measurements at the frequencies tested. This traceability can serve as a solid basis for meeting NVLAP (National Voluntary Laboratory Accreditation Program) and ISO requirements. back to top of page | back to index of time and frequency measurements Tests of Microwave PM/AM Noise Measurement Systems: On Site Tests (77136C)NIST provides a calibration service of the noise floor and performance of the noise floor and performance of PM and AM noise measurement systems at the customer's site using NIST's portable PM/AM noise standard for carrier frequencies of 10.6 GHz, 21.2 GHz, and 42.4 GHz. The PM/AM noise standard produces two signals with approximately +10 dB power (relative to 1 mW). The residual PM noise between the two outputs (relative to 1 rad 2/Hz) is typically less than -176 dB for a frequency offset from the carrier of 10 kHz and -190 dBc/Hz for offsets of 1 MHz from the carrier frequency. The calibrated PM or AM noise is typically constant with Fourier frequency offset to +0.2 dB out to 100 MHz. After each calibration a report is issued which certifies that the specific measurement system is traceable to NIST for PM and/or AM measurements at the frequencies tested. This traceability can serve as a solid basis for meeting NVLAP (National Voluntary Laboratory Accreditation Program) and ISO requirements. back to top of page | back to index of time and frequency measurements Special Time/Frequency Measurements: Oscillators and Other Components (77140S)NIST can provide calibration services for frequency and time domains at frequencies other than those cited in the above tests up to 110 GHz, but the uncertainty and cost are dependent upon the specific user requirements. Given two or more oscillators, synthesizers, frequency multiplier/dividers, or amplifiers, relative phase noise can be measured with low uncertainty and the frequency for the measurement is not as restrictive as above. Also, the 1 pulse per second output of atomic frequency standards can be measured with a standard uncertainty of 0.5 ns given an adequately defined pulse. Limited frequency and PM/AM noise measurements can be made from 75 GHz to 110 GHz. Please call to discuss your requirements. back to top of page | back to index of time and frequency measurements References—PM and AM Noise MeasurementsSecondary Standard for PM and AM Noise at 5, 10, and 100 MHz, F. L. Walls, IEEE Trans. I&M 42, 126 (Apr. 1993). Properties of Signal Sources and Measurement Methods, D. A. Howe, D. W. Allan, and J. A. Barnes, in Characterization of Clocks and Oscillators, edited by D. B. Sullivan, D. W. Allan, D. A. Howe, and F. L. Walls, Natl. Inst. Stand. Technol. Tech. Note 1337, 14-16 (1990). Characterization of Clocks and Oscillators, D. B. Sullivan, D. W. Allan, D. A. Howe, and F. L. Walls, eds., NIST Tech. Note 1337 (Mar. 1990). Frequency and Time-Their Measurement and Characterization, S. R. Stein, Precision Frequency Control, Vol. 2, edited by E. A. Gerber and A. Ballato (Academic Press, NY), 191-232 (1985). back to top of page | back to index of time and frequency measurements Program questions: Calibrations Phone: 301-975-2200, Fax: 301-975-2950 NIST, 100 Bureau Drive, Stop 8363, Gaithersburg, MD 20899-8363 |
