R&S®FSV Signal and Spectrum Analyzer

Signal analysis at its best

Applications

R&S®FSV-K7 AM/FM/φM measurement demodulator

The R&S®FSV-K7 AM/FM/φM measurement demodulator option converts the R&S®FSV into an analog modulation analyzer for amplitude-, frequency- or phase-modulated signals. It measures not only characteristics of the useful modulation, but also factors such as residual FM or synchronous modulation.

The following display and analysis alternatives are available:

  • Modulation signal versus time
  • Spectrum of the modulation signal (FFT)
  • RF signal power versus time
  • Spectrum of the RF signal (FFT versus max. 18 MHz)
  • Table with numeric display of
    • Deviation or modulation factor, RMS weighted, +Peak, –Peak, ±Peak/2
    • Modulation frequency
    • Carrier frequency offset
    • Carrier power
    • Total harmonic distortion (THD) and SINAD
    THD measurement on an amplitude-modulated signal. The first harmonic of the modulation signal is well suppressed by 69 dB. This corresponds to a THD (D2) of less than 0.1 %.

    THD measurement on an amplitude-modulated signal. The first harmonic of the modulation signal is well suppressed by 69 dB. This corresponds to a THD (D2) of less than 0.1 %.

    Measurement of the linearity of an FM ramp versus 40 MHz bandwidth.

    Measurement of the linearity of an FM ramp versus 40 MHz bandwidth.

    Demodulation bandwidth 100 Hz to 28 MHz, 40 MHz optional
    Recording time (depends on demodulation bandwidth) 7.5 ms to 3932 s
    AF filters  
      Highpass filters 20 Hz, 50 Hz, 300 Hz
      Lowpass filters 3 kHz, 15 kHz, 23 kHz, 150 kHz and 5%, 10% or 25% of demodulation bandwidth
    Deemphasis 25/50/75/750 µs
    Modulation frequency <14 MHz, >20 MHz optional, max. 0.5 x demodulation bandwidth
    Measurement uncertainty (deviation or modulation factor) 3%