Q: Does JRE Test manufacture
custom sized RF Shielded Test Enclosures?
A: Yes, JRE Test will consider the customer’s concept
and provide quotes for a new design with delivery of the
custom enclosure typically within 8 to 10 weeks ARO.
Q: How do I choose the proper filtering
capacitance of a D-Sub connector to guarantee the
required data rate is passed into the RF Enclosure?
A. JRE Test currently stocks filtered D-Sub
connectors that will pass data rates up to 1000 MBPS. A
capacitance of 1000pf is used for data rates speeds up
to 10 MBPS, 310pf for speeds up to 50 MBPS, 100pf for
speeds up to 100 MBPS, and 10pf for speeds up to 1000
MBPS. Pin counts vary depending on the manufacturer of
the D-Sub connector. Higher capacitance filter networks
provide higher levels of shielding effectiveness.
Q: Will the published Isolation Specifications be
affected by the type of capacitive filter used for data
or power connections into the enclosures?
A. Yes, the capacitance used in the filtered
connector will determine the RF Isolation
characteristics of the enclosure. Consult with JRE’s
sales department to determine the best option to use for
your application.
Q: Do JRE Test enclosures include properly
engineered fan ventilation options??
A. Yes, all vent options include (2) ½” Nickel Plated
cross sectioned panels that are tested to provide better
than -115 dB shielding effectiveness @ 1 GHz and better
than -95 dB shielding effectiveness @ 10 GHz. We use
specially engineered 'honey comb' style filters which
are both rugged and effective.
Q: Is it recommended to use shielded cables on all
RF bulkheads and data cables?
A. Yes, using properly shielded cabling on RF
bulkheads and data cables helps to guarantee the
isolation characteristics of each RF Shielded Test
Enclosure, ideally double shielded cable for best
results.
Q: Are the hinges and latches field replaceable if
they were to ever wear out from normal use?
A. Yes, all of the hardware used on JRE Test’s RF
Shielded Test Enclosures can be switched in the field at
the customers location.
Q: How often should the shielded gaskets be
replaced?
A. It is recommended to replace the gaskets after
20,000 lid cycles or once a year. Replacement gasket
kits are available for all of JRE’s enclosures.
Q: Can new connector options be added to an
already modified enclosure?
A. Yes, the I/O plate used in most of the enclosures
can be removed and sent back to JRE if new connector
configurations are required for a new test application.
The enclosure can also be milled to add new options in
the future.
