JPS Communications NXU-2, Installation And Operation Manual

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NXU-2 Operations Manual
2-8 JPS Communications, Inc.
2.8.2 Audio Level Adjustment Potentiometers and Input Test Point
A test probe may be inserted into the test point to measure the level of the incoming audio. See
Section 4.4.2 Input/Output Level Adjustments for input and output audio level setting
instructions.
2.8.3 Connection to Radio or Other Four-Wire Device (J7)
The interface between the NXU-2 and associated radio or other audio device is made via J7
(Audio/Control) on the rear panel. J7 is a female DB-15 connector.
Table 2-2
NXU-2 Pinout (J7)
PIN Signal Description
1 Ground Ground connection.
2 Not used.
3 /AUX In 0 Auxiliary Input 0 - Active low.
4 /AUX Out 0 Auxiliary Output 0 - Active low.
5 Ground Ground connection.
6 Audio Input Balanced audio input.
7 Analog Ground Analog ground.
8 Audio Output Unbalanced Audio output.
9 Not used.
10 /AUX In 1 Auxiliary Input 1 - Active low; general purpose.
11 /AUX Out 1 Auxiliary Output 1 - Active low; general purpose.
12 /COR Input Input from radio COR, programmable active high or
low.
13 /PTT Out Output to radio PTT, active low, open drain.
14 Audio Input Balanced audio input.
15 Analog Ground Analog ground.
2.8.4 Network Connection, J3
The NXU-2 is connected to the Ethernet network via rear panel connector J3 using a standard
RJ-45 Ethernet Patch Cable (non-crossover). A six-foot long cable is included with the unit.
2.8.5 Serial Port Connection, J4
J4 is a standard RS-232 DCE serial port. It is a female DB-9 connector, and can be interfaced to
most PCs, typically standard DTE serial ports, using the DB-9 straight-through serial cable
included with the NXU-2.
Table 2-3 J4 Serial Port Pinout
J4 pin Description
2 TX data
3 RX data
5 Ground