Standard Phase Noise
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The E5055A covers an RF frequency range from 1 MHz to 8 GHz for phase noise and AM noise measurements. The minimum offset frequency capability extends down to 1 mHz, providing exceptional close-in phase noise characterization. This wide frequency coverage makes it suitable for testing oscillators, synthesizers, VCOs, and other signal sources from low frequency through microwave bands.
Both options cover the same 1 MHz to 8 GHz frequency range, but Option 200 offers superior phase noise sensitivity at close-in offsets. At 1 GHz carrier with +10 dBm input, Option 200 achieves -111 dBc/Hz typical at 10 Hz offset, while Option 100 reaches -101 dBc/Hz. At higher offsets like 10 kHz and above, the two options converge to similar sensitivity levels around -169 to -175 dBc/Hz typical.
The E5055A provides leading close-in phase noise capability with a minimum offset frequency of 1 mHz. At 3 mHz start offset, RBW settings range from 0.3% to 30%, while at 1 mHz start offset, RBW settings range from 1% to 30%. This ultra-low offset capability is critical for characterizing high-stability oscillators and evaluating long-term stability parameters like Allan variance, which the E5055A can measure from 100 ns to 1000 s.
Maximum offset frequency varies with carrier frequency. For carriers from 1.61 GHz to 7.19 GHz, the maximum offset is 1 GHz in default mode. With max offset extension mode enabled, the E5055A can measure up to 8 GHz offset for carriers between 51 MHz and 150 MHz, and up to 3 GHz offset for carriers from 150 MHz to 5.19 GHz. Note that offsets above 30 MHz represent an AM plus PM composite measurement.
Yes, the E5055A with the S963015B advanced features option provides comprehensive VCO characterization. It sweeps measurement parameters against VControl, VSupply1, and VSupply2 voltages, measuring frequency, tuning sensitivity, power, and DC currents with up to 100,003 swept points. Two DC supply outputs deliver up to 1A (VS1: 0 to +16V) and 0.3A to 1A (VS2: -16V to 0V), and the DC control output provides -35V to +35V.
With the S963015B advanced features option, the E5055A provides wideband and narrowband transient measurements from 1 MHz to 8 GHz. Time resolution goes as fine as 20 nanoseconds in wideband mode, with time spans from 10 us to 1,000 seconds. Wideband mode captures frequency transients across spans up to 8 GHz, while narrowband mode simultaneously measures frequency, phase, and power for spans up to 320 MHz.
The E5055A supports cross-correlation factors from 1 to 100,000 (requires S963015B for factors of 2 to 100,000). Theoretical sensitivity improvements are 5 dB at 10 correlations, 10 dB at 100, 15 dB at 1,000, 20 dB at 10,000, and 25 dB at 100,000 correlations. Actual improvement may be limited by internal common noise and other factors, but this capability enables measurement of extremely low phase noise sources.
The E5055A achieves phase noise measurement accuracy of less than 1.5 dB for offsets up to 1 MHz, less than 2 dB from 1 MHz to 30 MHz, and less than 3 dB from 30 MHz to 100 MHz offset. Level measurement uncertainty for sinusoidal signals from 1 MHz to 8 GHz is ±1 dB for signal levels between -10 dBm and +15 dBm, and ±1.5 dB for levels from +15 dBm to +20 dBm.