1260-1550 pages

EADS North America Test and Services
Racal Instruments™
1260-155A/T/AT
3 GHz 1x4 Coaxial Tree Switch Plug-In
The Racal Instruments™ 1260-155/A/T/AT is a high-frequency, coaxial 1x4 binary
tree switch plug-in for use in either the Racal Instruments™ 1260-100 Adapt-aSwitch™ VXI carrier, or the Racal Instruments™ 1256 GPIB/RS-232/Ethernet
switching mainframe.
These switch cards are designed with an MCX interface connector, which is
known for its high signal fidelity with connectors and cable assemblies available
from many different vendors worldwide.
Key Features
Product Information
•t Can be used on both GPIB/
RS-232/Ethernet and VXI
platforms
The 1260-155 is available in four different
50 Ω versions to meet a wide range of
applications. The 1260-155A has two 1x4
binary trees with a 3 GHz bandwidth.
•t Coaxial interface
The 1260-155AT has two 1x4 binary
trees with a 3 GHz bandwidth and selfterminated channels.
•t Available with self-termination
and 1.5 GHz or 3 GHz bandwidth
•t 50 Ω characteristic impedance;
75 Ω impedance available
•t Ideal for general purpose RF
switching
•t No unterminated stub effects
•t Excellent isolation and
crosstalk characteristics
When used with the 1256 Switching
Mainframe, no controller is required, and
message-based operation is available.
The Adapt-a-Switch™ line includes drivers
for LabWindows™/CVI and LabView™
for VXI applications. It also includes
VXIplug&play support for frameworks
based on Microsoft Win32® application
programming interface.
The 1260-155 has two 1x4 binary trees
with a 1.5 GHz bandwidth. It also has
two 1x4 binary trees with a 1.5 GHz
bandwidth and self-terminated channels.
An interconnecting relay maybe added
to construct a single 1x8 tree.
Reduced VSWR versions of the 1260-155
and 1260-155T are also available.
1260-155A Typical VSWR
High signal fidelity is maintained through
the use of high quality RF relays, direct
connection of inputs immediately adjacent
to the relays, lack of unterminated stub
effects, and high quality MCX interface
connectors used in the design. This high
quality design enables the reduction of
insertion loss while maintaining excellent
isolation and crosstalk.
1260-155A Typical Insertion Loss
When used with the 1260-100 VXI carrier,
the 1260-155 requires an Option 01T to
communicate with the switch cards and to
provide both message-based operation for
ease of use and register-based operation
for maximum speed.
ECO# 2010-EADSTS-11-08-4-MU. Uncontrolled Unclassified Information (“UUI”). This documentation does not contain ITAR-controlled data within the definition of the ITAR
and has been reviewed and approved for release to non-US persons. EADS North America Proprietary Copyright © 2011