1260-X121 User Manual
Racal Instruments
©
2005
Module Operation 3-1
Chapter 3
MODULE OPERATION
Operating Modes
The 1260-X121 may be operated either in
message-based
mode
or in
register-based
mode.
In the
message-based
mode, the 1260-01T switch controller
interprets commands sent by the slot 0 controller, and determines
the appropriate data to send to the control registers of the 1260-
X121 module.
Operating In
Message-Based
Mode
Channel
Descriptors For
The 1260-121
The standard 1260-01T commands are used to operate the
1260-X121 module. These commands are described in the
1260-01T User’s Manual.
Each 1260-01T relay command uses a
channel descriptor
to select
the channel(s) of interest. The syntax for a channel descriptor is
the same for all 1260 series modules. In general, the following
syntax is used to select a single channel:
(@ <module address> ( <channel> ) )
Where:
•
<module address> is the address of the 1260-X121 module.
This is a number is in the range from 1 through 12, inclusive.
•
<channel> is the 1260-X121 channel to operate. This is a
number in the range from 0 through 19, inclusive.
Multiple individual channels may be specified using the following
channel descriptor syntax:
@ <module address> ( <chan1> , <chan2>
, . . ., <chanN> ))
