Vectronics VEC-813 - Manual (Page 2)

VEC-813/814 Intermod Filter Owner's Manual
2
VEC-814 INSTALLATION
The VEC-814 may be powered directly from your automotive or 13.5-VDC AC station
power source. Install a standard 2.1 mm x 5.5 mm coaxial-type DC power plug on the
supply line with (+) connected to the center and (-) connected to the barrel. A plug is
supplied with the unit, and extras may be obtained from Radio Shack or other electronic
supply houses. Use standard PL-259 coaxial connectors on the radio and antenna side of
the filter.
Important: Be sure to observe the Radio and Antenna markings when installing the
filter. If you reverse these connections, the filter's RF-sensing circuit
will not work properly and damage to filter components may result!
Also, do not use with transceivers where RF output power rating exceed
50-60 Watts.
The VEC-814 will draw a small amount of power to operate the by-pass switching and
RF sensing circuits whenever the unit is switched on. Be sure to switch the unit off when
not in use. Also, the insertion attenuation of the filter is approximately 6-8 dB, and in-
band signals will be attenuated by this amount whenever it is turned on. While this will
not affect reception in most signal areas, it may degrade reception of very weak signals.
A good rule-of-thumb when operating mobile is to leave the VEC-814 off unless you
need it.
If power is accidentally removed from you unit while in operation, there is no danger to
your transmitter or to the filter -- the VEC-814 will default to the "pass-through" mode on
both transmit and receive.
IN CASE OF TROUBLE
Your Intermod Filter is protected by one-year. If anything goes wrong during the first
year, we'll replace or repair your unit at no charge. However, before contacting the
factory, please check for the symptoms listed below. These are simple difficulties you
can fix yourself.
Filter fails to turn on: Check the power source. For VEC-813, check battery
condition. For VEC-814, check condition of power plug and power source.
Filter fails to disengage during transmit: For VEC-813, is HT power setting on ultra-
low power? For VEC-814, are Radio and Antenna connectors reversed?