611073-000 Tyco Electronics, 611073-000 Datasheet - Page 42

• Manufacturer Part Number: 611073-000
• Description: Connector Accessories Adapter Aluminum Alloy Olive Drab Cadmium Over Electroless Nickel
• Manufacturer: Tyco Electronics
• Type: Adapterr

2-24
Catalog 1654025
Revised 12-04
www.tycoelectronics.com
Dimensions are in millimeters
and inches unless otherwise
specified. Values in brackets
are U.S. equivalents.
Electrical Interconnection System Design
Integrated Military Harness Systems for Defense and Allied Industries
Complete Harness
When considering the com-
plete harness the coupling
calculations are relatively
simple. In general terms
they are the addition of all
the individual leakages
within the system from
connector to connector. The
analysis route is therefore
as follows:
1. Convert all decibel
2. Choose components for
3. Add the values deter-
4. Reconvert to decibels if
As a guide to the shielding
performance that can be
expected from a harness
that is constructed using
Raychem components,
Table 7 on the next page
has been compiled to help
in the product selection
process.
values at the desired
frequency to surface
transfer impedance.
a ‘balanced’ system, i.e.
the components should
have approximately the
same performance.
mined for surface
transfer impedance of
the components at the
frequency chosen.
necessary. (Table 5 can
be used for this purpose)
Connector
Dimensions are shown for
reference purposes only.
Specifications subject
to change.
Terminator
Cable Braid
For branched harnesses it
is necessary to determine
whether every branch has
the same susceptibility
requirements or carries the
same signals of power. The
performance requirement
of each branch is then
determined and the matrix
for the harness established.
This is a more complex
subject and not discussed
here. System improvements
may be achieved by chang-
ing either the connectors or
cable. In general terms
changing from a single to a
double optimized braid
improves the performance
of that component by 20-25
dB. A similar advantage is
achieved by changing from
MIL-C-26482 Series II to
MIL-C-38999 Series I
connectors. However, the
relative significance, as
part of the system, of each
component must be consid-
ered to determine the true
weighting effect. For the
optimum in system design
a balance of component
performances should be
achieved wherever possible
such that each of the
components is of similar
performance level.
Splice
USA: 1-800-522-6752
Canada: 1-905-470-4425
Mexico: 01-800-733-8926
C. America: 52-55-5-729-0425
Transition
General Considerations
Although cables and har-
nesses are considered to
be the most significant in
terms of coupling into sys-
tems the construction of
equipment boxes can play
an important part in the
overall EMI performance of
a system. With the increas-
ing use of high speed digital
circuits and the generation of
harmonics having high
energy content relatively
short printed circuit board
tracks can radiate or pick
up energy as efficiently as
cables. If the boxes them-
selves are not adequately
protected these circuits
may constitute an EMI
threat. There is a further
area of significance in the
EMI protection of the boxes
and this is the connector/
box interface. The junction
may be considered to be a
part of the harness system
and any degradation in it
may cause an overall
harness degradation.
South America: 55-11-3611-1514
Japan: 81-44-900-5102
Singapore: 65-4866-151
UK: 44-1793-528171
(Continued)
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