Pulsar TC-10B, User Manual

Page: 137 / 190

October 2003 Page 16–3
Chapter 16. Universal Checkback Module
16
Automatic Checkback Tests done
Periodically or at User-Specified Times
You can set the "master" checkback module to
perform automatic checkback tests after the
interval you specify has elapsed (e.g., six hours),
or up to four specific times each day (e.g., 1:00,
13:00, 5:00, and 23:00). These four times specify
the hour during which you want an automatic
checkback test to occur.
Loopback Test Capability
You can command a distant checkback module to
key its carrier for a duration you specify (e.g., 30
seconds), giving you time to set your local
receiver's sensitivity or perform other tasks.
Loopback tests are performed at both high and low
power. If loopback duration is set to 30 seconds,
the carrier is keyed on high power for 30 seconds,
then low power for 30 seconds.
Remote Communications
You can access a distant checkback module while
connected to any checkback module in the
network. This lets you get settings, events and
counts, and allows you to change a module's
settings, clear events, etc. from a module many
miles away.
Automatic Clock Synchronization
When enabled, the "master" checkback module
synchronizes the clocks of all remotes in the
network starting at 12:30 a.m.
16.1.1 Operating Controls
Unlike previous versions of the checkback
module, the Universal Checkback Module has no
jumpers. Instead, the module provides the
following configuration and control options:
• A DIP switch that lets you select either one
of six factory preset configurations or a
"CUSTOM" option that allows you to set
your own configuration
• Front panel switches that let you initiate
checkback and loopback tests, clear alarms
and the carrier recovery mode, and enable
or disable the automatic testing functions
• Rear panel input connections that let you
connect external switches to perform the
same functions as the front panel switches
• A standard RS-232 (DB9 female) PC
interface that lets you control the settings
and operation of the module - as well as the
other modules in the network - from your
PC
!
CAUTION
Care should be taken when inserting or
removing modules from the TC–10B chassis.
Modules should not be inserted or removed
while the chassis has power supplied to it.