Betekenis van:
frequency modulation

Voorbeeldzinnen

1. Audible signal device with frequency modulation:
2. AM, with 1 kHz modulation and 80 % modulation depth in the 20-800 MHz frequency range,
3. AM, with 1 kHz modulation and 80 % modulation depth in the 20-800 MHz frequency range, and
4. and 100 mW/100 kHz e.i.r.p. density applies when frequency hopping modulation is used, 10 mW/MHz e.i.r.p. density applies when other types of modulation are used
5. and 100 mW/100 kHz e.i.r.p. density applies when frequency hopping modulation is used, 10 mW/MHz e.i.r.p. density applies when other types of modulation are used
6. Frequency range, dwell times Measurements shall be made in the 20 to 2000 MHz frequency range with frequency steps according to ISO 11452-1: 3rd edition 2005. The test signal modulation shall be:
7. Audible signal device with frequency modulation: acoustical, etc., data according to Regulation No 28, Part I but equal passage of a significant frequency range within the above-mentioned range (1800 through 3550 Hz) in both directions.
8. ‘radio frequency identification (RFID)’ means the use of electromagnetic radiating waves or reactive field coupling in the radio frequency portion of the spectrum to communicate to or from a tag through a variety of modulation and encoding schemes to uniquely read the identity of a radio frequency tag or other data stored on it;
9. ‘Out-of-band emissions’: emission on a frequency or frequencies immediately outside the necessary bandwidth which results from the modulation process, but excluding spurious emissions (Article 1, No 1144 of the radio regulations).
10. "Radar spread spectrum" (6) means any modulation technique for spreading energy originating from a signal with a relatively narrow frequency band, over a much wider band of frequencies, by using random or pseudo-random coding.
11. "Radar frequency agility" (6) means any technique which changes, in a pseudo-random sequence, the carrier frequency of a pulsed radar transmitter between pulses or between groups of pulses by an amount equal to or larger than the pulse bandwidth. "Radar spread spectrum" (6) means any modulation technique for spreading energy originating from a signal with a relatively narrow frequency band, over a much wider band of frequencies, by using random or pseudo-random coding.
12. "Radar spread spectrum" (6) means any modulation technique for spreading energy originating from a signal with a relatively narrow frequency band, over a much wider band of frequencies, by using random or pseudo-random coding. "Real-time bandwidth" (3) for "dynamic signal analysers" is the widest frequency range which the analyser can output to display or mass storage without causing any discontinuity in the analysis of the input data.
13. "Radar spread spectrum" (6) means any modulation technique for spreading energy originating from a signal with a relatively narrow frequency band, over a much wider band of frequencies, by using random or pseudo-random coding. "Real-time bandwidth" (2 3) for "dynamic signal analysers" is the widest frequency range which the analyser can output to display or mass storage without causing any discontinuity in the analysis of the input data.
14. Designed or modified to use cryptographic techniques to generate the spreading code for "spread spectrum" systems, other than those specified in 5A002.a.6., including the hopping code for "frequency hopping" systems; 6. Designed or modified to use cryptographic techniques to generate channelising codes, scrambling codes or network identification codes, for systems using ultra-wideband modulation techniques, having any of the following characteristics: a. A bandwidth exceeding 500 MHz; or b. A "fractional bandwidth" of 20 % or more. 7. Not used;
15. "Time-modulated ultra-wideband" (5) means the technique in which very short precisely time-controlled RF pulses are modulated in accordance with communications data by shifting pulse positions (usually called Pulse Position Modulation, PPM) channelised or scrambled in accordance with pseudo-random noise codes by PPM, then transmitted and received in the direct pulse form without using any carrier frequencies, consequently having extremely low power density over ultra-wide frequency bands.