RA16PA/RA4PA Technical Speci
fi
cations
Includes speci
fi
cations for the RA4PA, RA16PA, and RA16SD Medusa Preampli
fi
ers.
Pinout Diagrams
16- and 4-channel pinouts (all models built after 2002):
A/D
RA4PA: 4-channels 16-bit PCM
RA16PA: 16-channels 16-bit PCM
RA16SD: 16-channels 16-bit sigma-delta
Sample Rate
6, 12, or 25 kHz
Maximum Voltage In
RA4PA and RA16PA: ±4 mV
RA16SD: ±5 mV
Frequency Response
3 dB 2.2 Hz - 7.5 kHz
Highpass Filter
2.2 Hz
Anti-Aliasing Filtering
RA4PA and RA16PA: 7.5 kHz (3 dB corner, 1 order, 6 dB per octave)
RA16SD: 7.5 kHz (3 dB corner, 2 order, 12 dB per octave)
S/N (typical)
RA4PA and RA16PA: 60 dB
Input Referred Noise
rms 3 uV bandwidth 300 - 3000 Hz
6 uV bandwidth 30 - 5000 Hz
Group Sample Delay
RA4PA and RA16PA: NA
RA16SD: 20 Samples
Input Impedance
100 kOhms
Power Requirements
500 mA while charging, 60 mA once charged
Battery
Li-ion Battery 1950 mAh, 20-25 hour runtime
1000 cycles of charging, not removable by user
Charger
6-9 V DC, >500 mA, center negative
Fiber Optic Cable
5 m standard, maximum cable length 12 m
st
nd
RA16PA/RA4PA Medusa PreAmps | 8
