Western Telematic PLS-345 - Manual (Page 39)

7. Operation
The PLS-345 offers three different methods for switching
A/B paths:
1. Manual A/B Switching: The manual A/B Switches on the
PLS front panel are used to initiate switching of one or
more A/B Circuits.
2. Code Activated A/B Switching: ASCII commands are
sent to the PLS to initiate switching of one or more
A/B Circuits.
3. Automated A/B Switching (Monitor Mode): The PLS
monitors a signal received via the Monitor Input Port, and
switches one or more A/B Circuits according to
user-defined parameters.
These methods are discussed in the sections that follow.
7.1. Manual A/B Switching
The most basic method for switching A/B paths is accomplished
using the manual A/B switches on the PLS front panel. When
performing Manual A/B switching, note the following:
· The Master A/B Switch (Labeled "All") can be used to
switch all three A/B Circuits.
· When an A/B Circuit is switched, the corresponding LED
indicators on the instrument front panel and back panel will
light.
7-1