Pulsar TC-10B, Руководство пользователя

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Page 16–2 October 2003
TC–10B System Manual
Technologies, Inc.
16.1 Description
|| All TC-10B terminals require a Universal
Checkback Module to operate correctly.|| The
Universal Checkback Module provides various
ways to automatically or manually test the carrier
channel. This new version of the module is a
microprocessor-based design that can function
either as a master or remote unit. It replaces the
master (style numbers 1606C37G01 and
1606C37G02) and remote (style number
1606C38G01) Checkback Modules used in older
systems. The module is designed for use both with
the TC-10B "ON/OFF" carrier system and with
other "ON/OFF" carrier systems using a UCBS.
Its major features include:
• PC interface for controlling settings and
operation
• On-line help
• User selectable encoded or timed carrier
operation
• Three user programmable outputs
• Optional timed communication fallback
• Optional low power tests
• Optional carrier recovery
• Automatic checkback tests done either period-
ically or at user-specified times
• Loopback test capability
• Remote communications
• Automatic clock synchronization
PC Interface for Controlling Settings and
Operation
You can control the module (and any other
Universal Checkback Module in the network) by
connecting your PC or laptop to the RS-232
interface on the module's front panel. If a PC or
laptop is unavailable to the user then the on-board
DIP switch can be used to select the standard
factory settings.
On-line Help
Valid commands and features are displayed when
you enter "help" on the command line. You can get
help at the level you need, from general help to
command-specific help.
Encoded or Timed Carrier Operation
The Universal Checkback Module lets you set
your communication to a simple keyed on/off
timed carrier or a more powerful encoded data
message.
Optional Timed Communication Fallback
The Primary Communication mode is initially
used for checkback tests. If the primary mode is
"encoded" and it fails and Timed Fallback
Communication is enabled, the module attempts
one more try using a simple timed communication
mode. If that succeeds, the module only issues a
minor alarm.
Optional Low Power Tests
When enabled, the Universal Checkback Module
performs checkback tests at both high and low
power. The module issues a minor alarm if only
the low power test fails, and a major alarm if the
high power test fails.
Optional Carrier Recovery
||This mode is to verify that any checkback test
failures were legitimate hardware failures and
were not caused by a brief noise burst.|| When
enabled, the Universal Checkback Module starts
"carrier recovery mode" after a failed checkback
test. In carrier recovery mode, the "master"
module initiates a checkback test using a more
frequent user interval, for example, every 15
minutes. After three consecutive successful
checkback tests, the "master" reverts to normal
operation and sets the "successful carrier
recovery” output. ||If three successful consecutive
checkback tests fail, the “delayed alarm” output is
set.|| Remotes in carrier recovery mode suspend
all checkback tests and wait until they receive
three good checkback tests from the "master". At
that time they also resume normal operation.