R&S®SMW-B22 FM/φM Modulator and Enhanced Phase Noise Performance

  • Overview

Key Facts

This option improves the phase noise performance from typically −135 dBc(1 Hz) down to -139 dBc(1 Hz) at 1 GHz carrier frequency, 20 kHz offset. Furthermore the nonharmonics are lower with this option. Additionally, the R&S®SMW-B22 option offers phase and frequency modulation.

Specifications

SSB phase noise (f = 1 GHz, CW, 20 kHz offset) < –136 dBc, –139 dBc (typ.)
Nonharmonics
(200 MHz < f  ≤ 1500 MHz, >10 kHz offset)
< –90 dBc

Key Facts

This option improves the phase noise performance from typically −135 dBc(1 Hz) down to -139 dBc(1 Hz) at 1 GHz carrier frequency, 20 kHz offset. Furthermore the nonharmonics are lower with this option. Additionally, the R&S®SMW-B22 option offers phase and frequency modulation.

Specifications

Spectral purity
SSB phase noise with R&S®SMW-B22 option CW, carrier offset = 20 kHz, measurement bandwidth = 1 Hz
  f = 1 GHz < –136 dBc, –139 dBc (typ.)
  f = 2 GHz < –130 dBc, –133 dBc (typ.)
  f = 3 GHz < –126 dBc, –129 dBc (typ.)
  f = 4 GHz < –124 dBc, –127 dBc (typ.)
  f = 6 GHz < –120 dBc, –123 dBc (typ.)
Nonharmonics with R&S®SMW-B22 option CW, I/Q modulation (full-scale DC input), level > –10 dBm,
> 10 kHz offset from carrier and outside the modulation spectrum
  100 kHz ≤ f ≤ 200 MHz < –77 dBc, –87 dBc (typ.)
  200 kHz ≤ f ≤ 1500 MHz < –90 dBc
  1500 kHz ≤ f ≤ 3 GHz < –84 dBc
  3 GHz ≤ f ≤ 6 GHz < –78 dBc
FM / φM
Maximum FM deviation FM mode: normal, f > 3 GHz 40 MHz
Maximum φM deviation φM mode: high deviation, f > 3GHz
fmod ≤ 80 MHz / deviation
80 rad
Modulation source   internal, external, internal + external
Modulation frequency response 10 Hz to 10 MHz <3 dB
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