BOB-3 Version 3.4 Application Guide ~ Copyright © 2004 by Decade Engineering ~ Page 14
cable drive amplifier with pre-equalization for cable loss characteristics. Decade Engineering offers a Camera
Adapter Board (CAB) with broad adjustment ranges and high drive capability for this purpose. A Cable
Compensator or Video Processor at the receiving end may also be suitable. Bear in mind that long cables are
subject to noise injection from a variety of sources, including ground loops, so the cable receiving circuit may have
to deal with several kinds of signal defect simultaneously. Coaxial cable losses in the baseband video spectrum are
notoriously nonlinear as a function of frequency, making long cable compensation a distinctly non-trivial exercise.
Note: BOB-3 was not designed to work with tape playback signals from VCRs. In many cases it will work as
desired, but overlay stability can be unacceptable with some VCRs. It's generally worse in special effects modes
(e.g. freeze frame).
If operation is intermittent:
Tin-plated contacts can become unreliable if an electrical contact treatment has not been applied. We suggest
DeoxIT Power Booster
TM
and ProGold
TM
(or PreservIT
TM
), from Caig Laboratories. Apply the contact treatment to a
cotton swab and polish all of the contact pads on your BOB-3 module, then reinstall it in the SIMM socket. This
procedure should result in a permanent cure for intermittent operation due to poor contact, where Tin or Tin/Lead
plating is present on the BOB-3 module or SIMM socket contacts.
Decade Engineering contact information:
Please check our website for the most recent version of this document before concluding that a defect exists.
Product warranty and service information is posted within the online ordering system.
Tel 503-743-3194
Fax 503-743-2095
Post 5504 Val View Dr. SE, Turner, OR 97392 (USA)
Email See website for current email contact information
Web www.decadenet.com
Obligatory Boilerplate:
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=O=
