Harris Intraplex STL-160 Series, Installation & Operation Manual

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Harris Corporation 6-1
Intraplex Products
Section 6 – Testing & Troubleshooting
This section describes the testing and troubleshooting procedures for the ACS-160 Series multiplexers
and provides an overview of the procedures used for testing payload channels. The section discusses
using
● ACS-160 Series switches and indicators.
● T1 loopbacks.
● T1 test equipment.
● Channel test equipment for in-service and out-of-service testing.
Test procedures for individual channel modules are located in the channel module manuals. The two
most common test scenarios are
● Bench testing - Two (or more) multiplexers are set up side-by-side on a test bench before the
actual field installation.
● Field testing - A system has been installed but is not yet in service or has been taken out of
service for maintenance or repair.
Generally, you can use the procedures in this section for both types of testing. Differences between
the two are noted where they occur.
While these procedures do not require remote control, a laptop PC connected to the multiplexer’s
remote port can be helpful. You can also use remote control to activate loopbacks in the far-end
multiplexer during field testing. Section 5 – “Remote Control Operation” gives details on using the
remote interface.
6.1 Recommended Tools & Equipment
Here is a list of the recommended equipment for testing and troubleshooting:
● Basic telecommunications installation tools (screwdrivers, wire stripper, and so forth)
● Volt-ohm meter (VOM)
● T1 test set – Basic ACS-160 Series test procedures do not require the use of a T1 test set.
However, you might need T1 test sets in some instances, such as to isolate an intermittent
problem.
● Three-conductor cable with bantam plugs on each end for access to the T1 test jacks on the CM-
5RB module(s). You might have this cable or you might obtain it from a commercial source.
● Test equipment for the payload channels (recommended equipment is listed in the individual
channel module manuals).
6.2 T1 Multiplexer Monitor & Control Features
The front edge of the CM-5RB common module contains several jacks, switches, and indicator lights
(Figure 6-1) which fall into three basic categories:
● Test access: The left side of the module contains T1 input and output test jacks (Section 6.5.1 –
T1 Test Jacks ).
● Configuration: The center section contains these items that work together to enable you to view
and change module operational parameters:
•
GROUP and SET/NEXT switches
• A four-character alphanumeric display for abbreviated group and function names
• A bi-level light set (green on top, red on the bottom) that indicates whether the function
shown on the display is currently active