Theory Of Operation; Introduction; Functional Blocks - Racal Instruments 1260 Series User Manual

1260 Series User Manual

Introduction

Functional Blocks

This section describes the theory of operation of a 1260 Series
switching system as configured from a 1260-01 Smart Card, and
a 1260 Series switching module. The 1260-40 switching module
is used as an example, and the reference designators for that
card are used in the circuit descriptions given in this section.
This section begins with a block diagram description of the
switching system, and extends the description to a discussion of
the circuit action that takes place in the 1260-01 and 1260-40 at
the component level.
The 1260-01 Switch Controller board consists of the following
functional blocks:
a. The Microprocessor Block
b. The VXIbus Interface Block
c. The Lbus Interface Block
The functional relationships between the blocks of the 1260-01 is
illustrated in Figure 4-1.
received from the VXIbus via the VXIbus interface, and routed to
the microprocessor block.
interpreted by the microprocessor block, and the corresponding
switch control information is transmitted to the appropriate switch
module via the Lbus interface.

Theory of operation

Switch configuration information is
The commands received are
Theory of Operation 4-1
Chapter 4