3
A
NTENNA ROUGH-IN
The dmc1 requires two antennas, one for AM and one for
FM reception. The AM antenna is a simple 25-foot length of
wire with an in-line ferrite fi lter to reduce interference. The
FM antenna is a 25-foot length of coax with a “T” shaped
wire dipole at one end that attaches between rafters in the
attic.
IMPORTANT:
Isolate the antenna leads from the intercom station
cables by running them through a separate hole in the ceiling plate
and through the right hole in the top of the wall housing. If grouped
together, the intercom station cables can shield the antenna leads
resulting in poor radio reception. Also keep the antenna leads away
from metal duct work and aluminum backed insulation, which also can
reduce reception.
Unroll and examine the 25-foot AM antenna wire. Find
the end with the ferrite fi lter (the small object with wire
looped through it). The short end of the wire from the fi lter
attaches to the dmc1 AM antenna terminal, the long end
of the wire is the antenna that goes up into the attic.
Fish the long end of the antenna wire up through the right hole in the
top of the wall housing, up the stud bay, through a hole in the ceiling
plate, and up into the attic. Pull all the wire through until the ferrite
fi lter lays inside the wall housing on the right side (see Figure 5).
Unroll and examine the FM antenna. The antenna is
formed by spreading the red and black wires at the end
if the coax. The terminal lug at the end of each wire
is for screw mounting the wires outstretched.
Fish the connector end of the antenna coax down through the
hole in the ceiling plate, down the stud bay, and into the hole
on the top right side of the wall housing. Leave about one foot
of coax extending into the wall housing (see Figure 5).
The antenna adjustment and fi
nal installation will be
completed during the dmc1 master fi nish-out.
R
OOM STATION ROUGH-IN
At each room station location, nail or screw a Model
dmc1HR-5 Room Station Rough-in Ring about
52” above the fl oor level (see Figure 6).
Route Cat-5 cable from the master’s wall
housing to the room station location.
Leave about 12” of extra cable extending at the room station
location. Wrap the cable around a nail at the room station
location to hold it and protect it from drywall damage.
Bring the other end of the cable into the master’s wall housing
through the top left wiring access hole or slot. Leave about 12” of
extra cable extending at the wall housing.
LABEL THE CABLE.
✔
1.
2.
3.
4.
1.
2.
3.
4.
CAT-5 TO
S
TATION
S
AM ANTENNA WIRE
FM ANTENNA
DIPOLE
WALL HOU
S
ING
(DMC1HC
S
HOWN)
AM FERRITE
FILTER
CEILING
PLATE
WHEN U
S
ING THE
DMC1H HOU
S
ING,
ROUTE CABLE
S
THE
S
AME WAY!
Figure 5. AM & FM Antenna Installation
CAUTION
The dmc1 master has a maximum load capacity of 15 speakers
(the total number of room stations, patio stations, and mono
speakers combined) and three door stations. No more than two
speakers or stations can be wired to any one station selector
switch. A maximum of two speakers or patio stations can be
wired to the patio switch.
CAT-5 CABLE
FROM MA
S
TER
WRAP CABLE
AROUND NAIL
DRYWALL
S
CREW
S
52"
DMC1HR-5
MOUNTING RING
(FORMED FLANGE
S
IDE OUT)
Figure 6. Room Station Rough-in
