Northern Airborne Technology PTA12-1xx - Manual (Page 5)

PTA12-100 POTS Telephone Adapter with Display
SM55-2 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-2
ENG-FORM: 800-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
1.4 Specifications
1.4.1 Electrical Specifications
Power Supply Power Input Voltage with reverse, over voltage and over current
protection
Input Voltage
Normal Operation
+30.3 Vdc (maximum)
+27.5 Vdc (nominal)
+22.0 Vdc (minimum)
+18.0 Vdc (emergency)
Abnormal Operation
+32.2 Vdc (maximum)
+27.5 Vdc (nominal)
+20.5 Vdc (minimum)
Input Current
0.2 Amps max. @
+27.5 Vdc
Lighting
1.0 mA max. @
+27.5 Vdc
1.0 mA max. @
+5.0 Vdc
Input Signals
Microphone 250 mVrms rated input level, amplified dynamic
Impedance 150 Ohm
±10%
Circuitry Type Single Ended
Mic Bias
+13 ±0.5 Vdc (selectable via switch)
Key In
Used to remotely control the Hook function. Momentarily pull to
Power Ground for a period greater than 500 ms to activate the
Hook function. Momentarily open circuit or apply voltage greater
than 26 Vdc for a period greater than 500 ms to set the Hook to
inactive. Optically isolated and requires 10 mA max source
current.
Output Signals
Rated Level 20 dBm
±3 dB into 600 or 150 Ohms @ 100mW
Circuitry Type Differential
Frequency Response
≤3 dB roll-off from 350 Hz to 3 kHz
Distortion
≤5% THD @ rated power output
Audio Noise
≤ -50 dB from rated output (no signal)