Introduction
68 X72 Desiger’s Reference and User’s Guide 097-10603-01 Rev. A – November 2004
Introduction
The X72 Developer’s Kit is provided by Symmetricom as a design aid and
development tool. It permits a design engineer to experiment with Symmetricom’s
X72 product in various applications and determine how to implement it in the most
advantageous manner.
The developer’s kit contains a hardcopy of this document, the X72 unit, a 3 foot
(0.914 M) interface cable, the adapter board assembly, application notes, and a CD
with electronic files documenting the specifications and performance of the unit. A
90 to 264 Vac universal power supply with an IEC connector is optional and can be
specified at time of order.
Mounting the X72 Unit
The X72 is designed to mount flush onto a heat absorbing surface using the four
mounting holes. During demonstration testing if a heat absorbing surface is not
available, a suitable heat sink can be ordered as an option.
Interface Cabling/Circuit Cards
The X72 cable is a shielded multi-conductor (26 wires) cable, 3 feet (0.914 M) long
with molex connectors at each end. Adapter cards are available in 3.5 inch (8.89
cm) and 1.740 inch (4.42 cm) lengths. A 3.25 inch (8.25 cm) cable is also available.
Connectors
The unit Molex connector is a 52629-2651, 1.00 mm (0.039”) pitch, shielded
receptacle right angle, SMT connector. The mating connector is a Molex 52660 plug
assembly.
Power
Note: Users must supply a power cable to connect the adapter board
to main power. Users may provide their own +12 Vdc source as long
as proper polarity is observed.
Note: The mounting screws for the X72 are metric (not SAE) and are
3 mm in size with 0.5 mm thread pitch. They should penetrate no
more than 5.0 mm into the X72 base plate.
Note: The X72 provided in the Developer’s Kit operates on 10 to 32
Vdc.
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