Northern Airborne Technology PTA12-3xx - Manual (Page 7)

PTA12-300 POTS Telephone Adapter with NVIS Display
SM55-3 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-4
ENG-FORM: 800-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Off-hook Condition
Impedance 600 Ohms @ 1kHz (nominal)
Circuitry Type
Balanced
DC Loop Current
25 mA (typical) to 130 mA (max)
DC Voltage
≤9.0 Vdc @ 25 mA loop current
Frequency Response
≤3 dB roll-off from 350 Hz to 3 kHz
Distortion
≤5% THD
Audio Noise
≤ -50 dB from rated output (no signal)
Available Audio
TX Audio, RX Audio
TX Audio
-1 dBm
±1dB into 600 Ohms with <5% THD
(Mic Input to tip/ring) (test condition: 250 mVrms @ 1kHz into Mic input, Mic level
potentiometer set to max.)
RX Audio
-20 to 0 dBm
(Typ expected 400 mVrms @ 1kHz RX audio on TIP/RING yields rated phones
audio level) output with both front panel VOL control and RX level
potentiometer set to max.
DTMF Signaling
Standard DTMF frequencies used
Frequency Tolerance
±1.5%
Supported Codes
0 – 9, *, #
DTMF TX on tip/ring
-2.2 dBm
±1.0 dB into 600 Ohms (DTMF level potentiometer set
to max.)
Serial Port RS232 protocol, RX, TX and GND
Baud Rate 19200
Frame Size
8 bits
Parity none
Stop Bits
1
Flow Control
Not available