Telecommunications Techniques Corporation T-BERD 310 Analyzer
The T-BERD 310 is a portable test instrument that can test
and analyze SONET, DS3, and DSI transmission systems from
SONET, DS3, and DSI access points during circuit
installation, acceptance testing, and fault isolation. The
T-BERD 310 can generate and receive test patterns for
out-of-service testing, or monitor SONET, DS3, and DSI
circuits without service interruption. Options can be added
that enable the T-BERD 310 to perform DSI testing, drop and
insert a DSI channel on a live DS3 line, drop El channels,
drop and insert OC-3, OC-3c, DS3 and DSI payloads on SONET
signals, and perform optical media tests. The instrument can
also be optioned to test and analyze ATM traffic on SONET,
DS3 and DSI transmission systems.
The following information describes the standard and
optional features for the T-BERD 310.
The T-BERD 310 offers the following standard features:
DS3 Pulse Shape measurement quickly isolates cable faults
that are not readily evident through traditional BERT tests.
Intermittent errors on DS3 hand-offs are commonly caused by
improper or loose crimps or degraded or damaged coaxial
cable. Pulse Shape measurements can also identify when too
much or too little coax has been installed, or if the line
build-out has been improperly set. These types of errors can
be the most time consuming for field technicians to find and
often result in "No Problem Found" resolutions leading to
poor customer service or future call-backs.
Enhanced user Interface
provides easy to use controls and
indicators designed to focus on DS3, SONET, and ATM circuit
Multiplexed C-bit parity and M13 framed operating modes
enable the T-BERD 310 to insert DSI D4 or ESF formatted test
patterns or loop codes into the DS3 signal.
Automatic configuration mode allows the T-BERD 310 to
configure itself automatically to the received DS3 signal
framing and pattern.
Standard and programmable DS3 test patterns are selectable
from a front-panel switch.
Five side-panel DS3 outputs provide the same signal as the
front-panel output jack.
Simultaneous test result accumulation minimizes the time
needed to test for DSI, DS3, or SONET signals.
A summary test results category displays key non-zero and
“out-of-spec” test results, eliminating the need to search
through long lists of test results.
Pattern slips can be counted between the transmitted and
received signal by testing the circuit with pseudorandom
Logic error, BPV, and frame error insertion capabilities
enable the T-BERD 310 to simulate errors as they occur.
Errors can be inserted singly, in bursts at preselected
durations and error rates, or continuously at preselected
Connecting a printer to the T-BERD 310 allows generation of
test results, signal status and alarm messages, front-panel
switch configurations, and pulse shape graphs. The T-BERD
310 comes equipped with an RS-232-C serial Interface
optional IEEE-488 Interface
An internal print buffer allows printouts to be stored until
a printer is connected to the T-BERD 310. The print buffer
is battery-backed which allows power to be turned off
without losing the printout information.
Customized test result printouts can be created for specific
Remote control operation enables the T-BERD 310 to be
installed at a remote location or in a manufacturing test
facility. An RS-232-C serial Interface
or optional IEEE-488
(IEEE-488 option) is available for remote control
Multiple displays enable the operating mode, test pattern,
and two test results to be displayed on the user Interface
at the same time.
Audible alarms can be used to indicate pattern
synchronization, threshold errored seconds, and any other
DS1 channels can be dropped from a DS3 signal to the
Option or an external DSI Test Set
DS2 frame synchronization and loss detection LEDs provide
status and alarm indications on the user Interface
Far-end alarm and control (FEAC) messages can be monitored
and displayed on the user Interface
and reported in a
printout. FEAC messages can also be selected and transmitted
from the T-BERD 310.