1260-X138 User Manual
Installation Instructions 2-2
Racal Instruments
©
2005
Installation
Installation of the 1260-X138 X-series Switching Module into a
1260-100X X-series Adapt-a-Switch Carrier assembly is described
in the “Installation” section of the 1260-100X X-series Adapt-a-
Switch Carrier manual (P/N 980914-100X).
Module
Configuration
The 1260-X138 contains eight 1x8 multiplexers, numbered from 0
through 7. Each multiplexer (mux) is made up of eight relays,
referred to as channels.
Figure 2-1
shows an example of one of
these multiplexers (multiplexer 7). In this example, the inputs are
channels 70 through 77. The user may close one or more relays to
connect the inputs to the common output.
Configuration relays on 1260-X138 allow for formation of different
multiplexers.
The 1x8 multiplexers are the building blocks of various multiplexer.
Figure 2-2 and Figure 2-3 show the complete block diagram of the
1260-X138 relays.
Possible multiplexer configurations are:
Eight 1x8s, four 1x16s, two 1x32s, or one 1x64. In addition
Multiplexer groups 0, 1, 2 and groups 3, 4, 5 can be configured to
form three 2x8s, two 2x16s, or one 2x24.