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 configurations 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
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0 1 2 3 4 2728293031
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 configured as a 2x8
matrix with additional isolation relays as shown in Fig. 5. Installing up to 16 modules in the matrix
chassis allows the formation of matrices up to 32x8 as shown in Fig. 6. Each CXE Switch Module re-
quires 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.
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CXE/2x8 Switch Module
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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 configurations, where
the number of installed switch modules determines the num-
ber of connections in the N direction. All systems are com-
pletely bidirectional, so either side of the matrix may be con-
sidered inputs or outputs. Expansion chassis are used with a
MESA Control chassis for cost effective configuration of ma-
trix sizes which exceed the limits of a single chassis. See the
MESA Bulletin for details on building larger systems.
01234567
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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