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General specifications

  • Balanced stereo: XLR-3 and RJ45 connectors
    Auto-adjusting level 0 dBu to +15 dBu, Z = 600/10 kΩ
  • Unbalanced stereo: RCA connectors
    Auto-adjusting level –15 dBu to 0 dBu, Z = 10 kΩ
  • Digital USB (optional)
  • Balanced stereo: XLR connectors, +4 dBu, Z = 600/10 kΩ
    With de-emphasis (flat response).
  • Digital USB (optional)
  • Dual MPX output with independent level adjustment (4 Vpp, factory setting), Z = 600/10 kΩ.
  • Differential output for canceling ground loop hum between transmitter and studio ground.
  • Frequency response: 20 – 16,000 Hz ±0.5 dB (measured below compression/limiting threshold).
  • Harmonic distortion: < 0.02% (30 – 15,000 Hz).
  • Noise: < –90 dBA referenced to 100% modulation.
  • Stereo separation: > 75 dBA.
  • Subsonic filter: 2nd order Chebyshev, 15 Hz.
  • Asymmetrical cancellation: 5:1 ratio, Kahn-Bonello method.
  • Expander: 10:1 slope, 100 µs attack.
  • AGC (wideband): VCA controlled.
    Range: 30 dB (–10 dB / +20 dB relative to nominal input level).
  • Multiband compression:
    • 3 bands, 18 dB/octave, linear phase crossover.
    • Compressors: 30 dB range, 5:1 slope.
    • Automatic attack.
    • Recovery: controlled by Energy knobs.
    • Clipper with IM canceller (> 30 dB attenuation below 250 Hz).
    • Dynamic EQ: 0 – 12 dB dynamic boost in bass, mid and treble.
115 V / 230 V (selector on rear panel)
50/60 Hz, 20 W
19” rack mount module (44.4 mm).

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Stereo Coder Specifications

2 Vpp for 100% MPX output (4 Vpp).
  • Frequency response:
    • 15 kHz / 5th order elliptic LP filter, –1 dB at 15 kHz.
    • 20 – 14,000 Hz ±0.25 dB.
    • Attenuation at 19 kHz > 40 dB.
  • Harmonic distortion:
    • < 0.01% THD (20 – 15,000 Hz).
    • Typical: 0.003% @ 1 kHz.
  • S/N ratio: > 90 dBA (ref. 100% modulation).
  • Stereo separation: 65 dB @ 1 kHz.
  • 38 kHz: better than –70 dB (ref. 100% modulation).
  • 57, 76 and 95 kHz: better than –75 dB (ref. 100% modulation).
±0.002% (±0.5 Hz).