Vega U2020 Application Guide
3
Application Tips
The MC-2020 and MC-2020A are supplied with eight 24" (60 cm) BNC RF cables for connecting the multicoupler
output to four R-2020 receivers. Unless remote antennas will be used, no additional RF cables will be required.
The MC-2020 and MC-2020A are not supplied with antennas. Generally, installations that use multicouplers will
require remote antennas. If the use of whip antennas is acceptable, the whips supplied with one of the R-2020s can be
used. Note that the antennas can be converted from right-angle to straight whips by loosening the hex set screw on the
side of the antenna body, removing the antenna element, reinserting it into the hole on the end of the body, then
retightening the set screw.
The R-2020 receiver and MC-2020 series multicouplers include a feature that allows the antennas to be mounted on
either the front or the rear of the unit. These units are normally shipped with the connectors on the rear panel. If
relocation to the front panel is desired (to permit use of the supplied whip antennas when the equipment is rack
mounted, for example), proceed as follows.
To move antennas to the front of the multicoupler
1.
Remove the screws attaching the bottom cover of the unit and detach the cover.
2.
With a 5/8" (16 mm) socket wrench, remove the hex nuts attaching the connector to the multicoupler rear
panel.
3.
Gently push out the round plastic cover hole covers on the front panel of the unit.
4.
Remove the antenna connectors from the rear panel of the unit and install them in the front panel of the unit.
Make certain that the internal antenna cables do not lie down directly on the multicoupler circuitry, as this
will affect performance.
5.
Reinstall the connector hex nut and lockwasher, then gently tighten the nut. Do not use excessive force, as
this can crack the panel of the unit.
6.
Repeat for the other connector.
7.
Push round plastic cover hole covers into the hole where the antennas were before and reinstall the bottom
cover of the unit.