Interoperability Now!
6-1
6
NXU-2B Field Optimization Guide
This Section assumes that the NXU-2B Manual has already been configured per the previous
instructions in this manual. The purpose of this Field Optimization Guide is to assist with various
adjustments and “tweaks” for best performance with the varying radio and communications
systems encountered in the field.
There are several paths to optimization, most important is:
•
Are you using a JPS Custom Radio Interface Cable (strongly recommended)?
•
Are you creating your own interface cable?
The
JPS Custom Radio Interface Cables
were designed by JPS Systems Engineers who
investigated the radio’s analog interfaces, then designed an appropriate interface between the
radio and the JPS equipment, including verification in the lab. Some interfaces are simple, others
not so. Some require DC blocking capacitors or unusual level-setting networks. The JPS cables
include a small circuit board that contains every type of matching/interface network required for
the interfaces to hundreds of different radio makes & models.
Along with each JPS radio interface cable is an Applications Note specific to the type or types
of radios associated with that cable. The Application Note lists the basic settings to optimize the
interface within the JPS equipment in tandem with the cable. Just as importantly, it lists any radio
programming, or switch/level/jumper plug settings required at the radio for proper operation. JPS
cables are always the best option for interfacing a radio to the NXU-2B or other JPS equipment.
6.1
Radio Interface Using JPS Custom Radio Cables
This section will assume that a JPS radio interface cable is used. See the next section if not.
The cable should easily connect to the radio; many are built by splicing a cable manufactured for
the specific radio to the appropriate signal lines on the JPS cable.
Follow the instructions of the Application Notes that came with the cable. If the notes are missing,
request a new set from JPS Customer Service at
Included in the Application Notes are:
•
Configuration settings for the rear analog interface, optimized for the JPS Cable when
used with the associated radio or other communications device. Note that Applications
Notes were created for use with a variety of JPS gateways; pay attention only to the
configuration settings available on the NXU-2B Configuration Page.
•
Changes that may be required or suggested for the radio itself; either in its configuration
or programming.
Next step is to take care of optimization and/or settings that must be adjusted in the field. Most
of the following are best accomplished using a test count from a “companion radio” that’s in
communication with the donor radio cabled to the NXU-2B.
Summary of Contents for NXU-2B
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