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Характеристики Polycom SoundStructure SR12

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Inputs

  • Phantom power: 48 V DC through 6.8kOhm series resistor per leg, 7.5mA per channel, software selectable
  • Analog input Gain: -20 to 64 dB on all inputs in 0.5 dB teps, software adjustable
  • Maximum input amplitude: +20.4 dBu, 1% THD + N
  • Nominal level: 0 dBu (0.775V rms)
  • Equivalent input noise: <-122 dBu, 20 - 20,000 Hz, Rs=150 Ohms (1%)
  • Input Impedance: 10 kOhms
  • Input EMI Filter: Pi filter on all audio inputs

Outputs

  • Output Gain: -100 to 20 dBu in 1 dB steps, software adjustable
  • Maximum output amplitude: +23 dBu, 1% THD + N
  • Nominal output level: 0 dBu (0.775 V rms)
  • Output impedance: 50 Ohm, each leg to ground, designed to drive loads > 600 Ohms
  • Output EMI Filter: Pi filter on all audio outputs

Power and Thermal

  • Internal supply
  • Input voltage of 90-250 VAC; 50-60 Hz; line power requirements (including 0.6 PF): 105VA (SR12)
  • Thermal dissipation (Btu/hr): 215 Btu/hr
  • 0 to 40°C operating temperature

Dimensions

  • 19” x 13.5” x 1.75” in (483 x 1343 x 45 mm) (W x L x H) (one rack unit)

Weight

  • 12 lbs. (5.5 kg) dry, 14 lbs. (6.4 kg) shipping
  • Connectors
  • RS-232: DB9F
  • OBAM In/Out: IEEE 1394B
  • CLINK2 : RJ45
  • LAN: RJ45
  • Control /Status: DB25F
  • Audio: Mini (3.5mm) quick connect terminal blocks
  • IR Receive: Mini (3.5mm) quick connect terminal block

System1

  • Frequency response: 20-22,000 Hz, + 0.1 /- 0.3 dB
  • Idle channel noise: <-109 dB FS no weighting, 20 - 20,000 Hz, -60dB FS, 0.997 kHz input signal, 0 dB gain
  • Dynamic range: >109 dB FS no weighting, 20 - 20,000 Hz, -60 dB FS, 0.997 kHz input signal, 0 dB gain
  • Linearity: 0 dB FS to -122 dB FS +/- 1 dB
  • THD+N: < 0.005%, -20 dB FS input signal
  • Common Mode Rejection Ratio: <-61 dB, 20 - 20,000 Hz, no weighting
  • Cross talk: <-110 dB, 20-20,000 Hz, 1kHz, channel-to-channel
  • Latency: Mic/Line inputs to outputs: 5msec, 20 msec with NC processing enabled
  • Noise cancellation: 0-20 dB, software selectable
  • Control Inputs: Contact closure
  • Status Outputs: Open collector 60V and 500mA maximum per output
  • All signal ground pins connected to chassis ground through low impedance planes

1 Unless noted, all values are valid for all channels at 0dB input gain