Specifications

Fig. 1
Fig. 2
CXAR CHASSIS
CXAR/16 and CXAR/32 MAINFRAMES
CXAR EXPANSION CHASSIS
CXR SERIES SWITCH MODULES
This is the same as the model -1HT
but without termination.
This is an 8x1 two pole configuration as
shown in Fig. 3. Great for switching balanced
line 100 ohm differential pairs. It is available
with isolated BNC's or Twin BNC connectors
(Twinax), and uses Type 2A relays.
Fig. 3
HIGH FREQUENCY SPECIFICATIONS
CXR/8x1-2A
Bandpass Isolation
Type MHz at 100 MHz
CXR/xxx-1 & 1T 360 60dB
CXR/xxx-H1S & H1T 300 70dB
CXR/xxx-2A 200 45dB
These Chassis control up to 16 or 32 switch points in any con-
figuration. LEDs on the front panel show Switch and Power
Status. Add Switch Module(s) and a Control Module to com-
plete the system. Standard Chassis depth is 12". Chassis height
is typically 3.5".
See Drawing Pages following this bulletin..
CXAR/64 and CXAR/128 MAINFRAMES
These Chassis control up to 64 or 128 switch points in any
required configuration. Add Switch Modules, CL8s and a Con-
trol Module to complete the system. The CL8s provide LED
indication of Switch Status through the front panel. Standard
Chassis depth is 12". Chassis height is determined by Switch
Module selection and configuration but is typically 5.25", 7.0"
or 8.75". See Drawing Pages following this bulletin.
The CXAR Chassis are 19" rack mounting units with power supplies and are pre-wired to accept the CXR
Series of Switch Modules. The Switch Modules are mounted so that the connectors protrude through the
rear panel. The front panel provides LED indication of switch status and optional manual controls. The
following Units are available:
The CXR Series of Switch Modules have Coaxial Relays interconnected by characteristic impedance
striplines to connectors on both bi-directional inputs and outputs. Isolation relays on the commons
reduce crosstalk between interconnected modules.
All CXAR Chassis are available as Expansion Chassis for use
with a MESA Control Chassis. This allows configuration of large
or complex systems with one point of control.
CXAR-2
0
1
2
3
COM
4
5
6
7
ISO1
ISO2
COM
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
COM
CXR/4x1-2A
This is the same 2 wire module but as a 4x1
configuration.
CXR/2x1-1S (Form A)
CXR/2x1-2S (Form A)
CXAR/16 With Pushbutton Manual Control
CXAR/128 Rear View
CXR/8x1-1T
This is the same configuration with only four
relays and without terminations.
This module has single pole Type T relays
which terminate the inputs to the required im-
pedance as shown in Fig. 1. Energizing the
selected relay removes the termination from
the input and closes the circuit.
CXR/8x1-1S
This is the same configuration but without ter-
mination.
CXR/4x1-1T
This is the same terminated configuration with
only four relays.
CXR/4x1-1S
CXR/8x1-1HT
This is a High Isolation Module with
relays which terminates the inputs to
the required impedance and have ad-
ditional isolation relays as shown in
Fig. 2, which decrease the crosstalk
between channels by 20dB. Energiz-
ing a relay removes the terminating im-
pedance and completes the selected
path.
CXR/8x1-HS
This has the same high isolation char-
acteristics as the model -1HT but with-
out input termination.
CXR/4x1-1HT
This has the same characteristics and
configuration with only four relays.
CXR/4x1-1HS
This module switches a common port be-
tween A, B or OFF positions as shown in Fig.
9 (seen on last page of bulletin). Module uses
single pole, Type S or Type M reed relays.
Same as above with two pole relays.