PHASE NOISE Clause Samples
The "Phase noise" clause defines the requirements and limitations regarding the unwanted frequency fluctuations, or phase instability, in a signal or system. In practice, this clause sets acceptable thresholds for phase noise levels in electronic components such as oscillators or transmitters, often specifying measurement methods and frequency offsets at which phase noise must be evaluated. By establishing these standards, the clause ensures signal integrity and minimizes interference, which is critical for the reliable performance of communication systems and sensitive electronic equipment.
PHASE NOISE. [*] [*] CONFIDENTIAL TREATMENT REQUESTED BY ICO GLOBAL COMMUNICATIONS (HOLDINGS) LIMITED. [*] [*] CONFIDENTIAL TREATMENT REQUESTED BY ICO GLOBAL COMMUNICATIONS (HOLDINGS) LIMITED. [*] [*] CONFIDENTIAL TREATMENT REQUESTED BY ICO GLOBAL COMMUNICATIONS (HOLDINGS) LIMITED. [*]
PHASE NOISE. The single side-band phase noise in 1 Hz bandwidth, relative to the carrier, induced on the transmitted carrier by the modem and LES (excluding phase noise induced by the AFC system), shall be below he following envelope on a plot with a logarithmic scale: 10Hz to 100Hz -2 -30 log (f) dBc 100Hz to 1000 Hz -22-20 log(f) dBc greater than 1000Hz -82 dB dBc If any discrete phase noise component is present, at a level that exceeds the limits mask, then the 10Hz to 100 kHz band shall be considered to be divided into a number of contiguous sub-bands, each containing no more than one discrete component. The width of a sub-band containing a discrete component shall not exceed F/5 Hz, where F is the frequency of the discrete component. In each sub-band the integrated phase noise including continuous and discrete components shall not exceed the above mask. Additionally no discrete component shall exceed the mask by more than 10 dB.
PHASE NOISE. The overall radio system RMS phase noise as measured at the transmitter output while transmitting a continuous carrier single-tone at the maximum PEP shall not exceed the following values:
PHASE NOISE. 2-7 2.4 TELEMETRY, COMMAND AND RANGING....................................2-7 2.4.1 Launch, Transfer Orbit, On-Orbit and Contingency Mode Requirements .........................................2-7 2.4.1.1
PHASE NOISE. Simulation(Typical) Measured Phase Noise [dBc/Hz] Figure 13 shows the measurement and simulated results of phase noise of RF PLL. 1E+3 1E+4 1E+6 1E+7 Measured phase noise at the 1 MHz offset from carrier frequency is −86.4 dBc/Hz and a few dB degradation is observed compared with the simulation results. The degradation is from a fault in compensation circuit connected with Voltage Controlled Oscillator (VCO). This issue will be fixed with a newer version of the chip (TS3), which is available on May 2021.