NXU-2A Operations Manual
2-8
Interoperability Now!
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 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-2A and associated radio or other audio device is made via J7
(Audio/Control) on the rear panel. J7 is a female DB-15 connector.
Note: an
Audio Crossover Adapter
, part number
0313 080515
is included with the NXU-2A.
This DB-15 male to DB-15 female adapter allows the use of radio cables developed specifically
for the JPS ACU-1000 Intelligent Interconnect system to be used with the NXU-2A. It provides
a crossover of transmit and receive audio as well as COR and PTT control signals.
You only
need this adapter if you are planning to connect an NXU-2A to a radio and you are using a
cable specifically designed to connect an ACU-1000 to that radio.
The adapter makes the
NXU-2A audio connector pinout match the one found on the ACU-1000. If you are wiring your
own cable, or if you are connecting the NXU-2A directly to an ACU-1000 then you don’t need
the Audio Crossover Adapter.
Table 2-2
NXU-2A 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-2A 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.
Содержание NXU-2A
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