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NB2800
User Manual for NRSW version 4.5.0.100
Autio-PTT Specification (Option Ap)
The Audio-PTT (push to talk) has the following specification in common:
Feature Specification
Isolation to enclosure/GND functional (max. 100 VDC)
Max. cable length 30 m
Cable shield mandatory
Connector type RJ45
Table 3.30.: Common PTT Specification
The Audio signal have the following specification:
Feature Specification
Number of ports 1x Line In / 1x Line Out
Input reference level 0dBFS Signal level 1.9 Vpp
Input impedance 21 kΩ
Input bandwidth 100 Hz- 15 kHz
Output voltage @ 0dBFS 600 Ω, signal level 3.7 Vpp
Output bandwidth 300 Hz- 4 kHz
Table 3.31.: Audio Port Specification
The Digital Input signal have the following specification:
Feature Specification
Number of ports 1x Digital In
Max. input voltage 60 VDC
Max. input current 2 mA
Reverse polarity protection Yes
Min. voltage for Level 1 (set) 7.2 VDC
Max. voltage for level 0 (not set) 5.0 VDC
Table 3.32.: Digital Input Specification
Note: A negative input voltage is not recognized.
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