Microwave switch driver for easy
routing of high frequency signals
in your system
The L4445A allows you to
control switches, attenuators
and other devices close to your
device under test. The L4445A
combined with the 34945EXT
provides the power and control
signals to drive up to 64 switch
coils—that’s 32 standard SPDT
switches.
The L4445A can be extended
by adding additional 34945EXT
extenders. The first 34945EXT
is powered by the L4445A. You
can add up to seven additional
34945EXT extenders with user
supplied power. Multiple switch
operations are performed in
sequential order, or for faster,
simultaneous switching, you
can connect an external power
supply to the 34945EXT.
The digital outputs can also
be used to drive LEDs for indi-
cation of the switch position.
The L4445A/34945EXT also has
digital inputs so that you can
read back the actual position
of the switch or attenuator.
The L4445A comes with a
standard 9-pin connector
for simple connection to the
34945EXT. The Y1150A-Y1155A
distribution boards plug onto
the 34945EXT and are used to
route the power and control
signals from the driver to the
switches using user supplied
cables. This enables simple
connections to the external
switches without a lot of
complicated wiring.
The following microwave
switches and attenuators are
supported with the Y1150A-
Y1155A distribution boards:
• N181x/U9397x series
SPDT switches
• 8762/3/4 series SPDT switches
(screw terminals)
• 8765x coaxial switches
• 8766x/8767x/8768x multiport
switches
• 87104x/106x/L710xx/L720xx
multiport switches
• 87406x series matrix switches
• 87204x/206x series multiport
switches
• 87606x series matrix switches
• 87222x/L7222 transfer
switches
• 849x series attenuators
• 8490x series attenuators
• Screw terminal connections
Ethernet connectivity enables
simple connection to the
network and remote access
to measurements
The Ethernet interface offers
high-speed connections that
allow for remote access and
control. You can set up a private
network to filter out unwanted
LAN traffic and speed up the
I/O throughput, or take advan-
tage of the remote capabilities
and distribute your tests world-
wide. Monitor, troubleshoot, or
debug your application remotely.
Ethernet communication also
can be used with the support
of LAN sockets connections.
2
