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85330A Multiple Channel Controller A-5
Glossary
Standard System
A “standard system” uses one 85330A with one or two switch control units,
each with a two-throw or four-throw switch module. Remember that 85330A
PORT 1 and PORT 2 are addressed independently. So:
• If you have two SCUs, both can use the default SCU address (0).
• You can use the default channel numbers (1 through 4) for both switch
modules. Since each SCU is on a different port, and each port is
addressed independently, there is no channel number conflict.
Switch Control Unit
Each switch control unit (SCU) provides bias and switch control of one
switch module. Each SCU contains a decoder board, which allows you to set
the SCU to a unique SCU address from 0 to 3 using DIP switches. The
factory default setting is 0.
Switch Address
This is the complete software address for a specific switch. It is simply a
concatenation of the SCU address (0, 1, 2, or 3) with the channel number
(usually 1, 2, 3, or 4, but possibly a number up to 64).
Examples:
@2 = SCU address is 0 (and need not be specified), and channel 2 is
selected.
@103 = SCU address 1 and channel 3 selected (usually a custom
system).
@232 = SCU address is 2 and channel 32 is selected (custom systems
only).
Switch Module
The single-pole two-throw (SP2T) or single-pole four-through (SP4T) RF
switch. The switch module is controlled by a Switch Control Unit.
Typical
When a specification is noted as being typical it means that most units
exhibit the stated performance, but not all. For this reason, the specification
in not guaranteed by Agilent Technologies. Generally, typical specifications
are provided for non-critical performance categories.