44
15 SM30 SYSTEM SPECIFICATION
GENERAL
The specification relates to a Control Centre with corresponding modules.
MICROPROCESSOR HARDWARE
- EEPROM data storage time : > 10 years
RECORDED MESSAGE MODULE
- data retention : > 30 days
- audio bandwidth : 320 - 6000 Hz
- max. total recording time : 65 seconds
- max. number of messages : 4
- microphone phantom power supply voltage : 12 V DC
AUDIO OUTPUTS
Music input to music output
- gain:
control range : > 60 dB (2 dB steps)
mute : > 80 dB
- input level : > 150 mV
- output level symmetrical:
nominal : 0 dBV
maximum : +12 dBV
- amplifier output distortion:
THD at nominal level : 0.1%
THD at max.output : 0.3%
- amplifier S/N output at nominal level : > 80 dB (flat)
Call Station or Microphone input to call output
- output level symmetrical:
nominal : 0 dBV
maximum : +12 dBV
- Microphone Input Module:
input level : > 1.5 mV
frequency response : 50 - 15000 Hz (± 2 dB)
signal-to-noise ratio : 68 dB (flat)
- Call Station:
input level : > 84 db (SPL)
frequency response : 440 - 12500 Hz (± 3 dB)
signal-to-noise ratio : 58 dB (flat)
- amplifier output distortion:
THD at nominal level : 0.1%
THD at max.output : 0.3%
Music and call Output Impedance
- at 1 kHz : < 50 Ω
GB/SM 30 user manual 5/26/98 10:18 AM Page 44
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