Specifications
CXB SERIES MODULAR SWITCH MATRIX
The CXB Series of Modular Coaxial Switch Matrices provide incremental matrix sizes from 2x4 or 1x8 up
to 32x4 or 16x8. 50 ohm signals from DC to 50 MHz can be switched, with isolation of -50 dB at 50 MHz.
Up to 16 CXB Switch modules and CL8 Display modules are plugged into the coaxial motherboard to
supply the required matrix congurations as shown in Figs. 1 and 2. The CL8 Display modules provide
visual indication of switch status to aid in troubleshooting test routines and debugging programming.
The modules are available with Type S dry reed relays or Type M mercury wetted reed relays for up to 50
watt switching.
CXB/16x8 Matrix Chassis
Fig. 1
Fig. 3
CXB/32x4 Matrix Chassis
Fig. 4
CXE/32x8 MODULAR MATRIX
The CXE/32x8 Matrix uses CXE/2x8 Switch Modules to form modular systems in the same manner as the
CXB systems shown above. Each switch module has 16 single pole coaxial relays congured as a 2x8
matrix with additional isolation relays as shown in Fig. 5. Installing up to 16 modules in the matrix chas-
sis allows the formation of matrices up to 32x8 as shown in Fig. 6. Each CXE Switch Module requires
one CLE/16 Display Module for control and LED display of selected relays. All remote control options
are available. A fully populated CXE/32x8 has a bandpass of DC to 50 MHz (-3dB) with Isolation of -50 dB
at 50 MHz. Inputs and outputs are fully bidirectional and use BNC connectors.
CXE/2x8 Switch Module
CXE/32x8 Matrix
Fig. 5
Fig. 6
CX-2
CXB/16x8 or 32x4 Matrix
CXB CHASSIS
CXB/16x8 and CXB/32x4 Mainframes and Expansion Chas-
sis are built for either Nx8 or Nx4 Matrix congurations,
where the number of installed switch modules determines
the number of connections in the N direction. All systems are
completely bidirectional, so either side of the matrix may be
considered inputs or outputs. Expansion chassis are used
with a MESA Control chassis for cost effective conguration
of matrix sizes which exceed the limits of a single chassis.
See the MESA Bulletin for details on building larger systems.
CXB SWITCH MODULES
CXB/1x8-1S or -1M SWITCH MODULE
These modules are used with CXB/16x8 Chassis to provide
Nx8 matrices. Each module supplies one connection in the
N direction as shown in Fig. 3, and a total of 16 modules will
form a 16x8 matrix. Each switch module requires one CL8
Display/Driver module.
CXB/2x4-1S or -1M SWITCH MODULE
These modules are used with CXB/32x4 Chassis to provide
Nx4 matrices. Each module supplies two connections in the
N direction as shown in Fig. 4, and a total of 16 modules will
form a 32x4 matrix. Each switch module requires one CL8
Display/Driver module.
Fig. 2