SABINE SWM7000 Operating Manual page 39

1. Antenna Repositioning. Provides solutions when receiver placement
options are limited or challenging. Sabine's Extension Antenna's multiple
mounting options allow higher placement (wall mount or microphone stand
mount).
2. Barriers interrupting transmission. Anytime a barrier interferes with
transmission and reception, Sabine's SWASS-EXT can be mounted on the
transmitter side of the barrier with cable connections made on the receiver
side. Perhaps the most common situation of this nature would arise when
receiver and transmitter are located in separate rooms.
3. Expanded or directional sensitivity required. Sabine's Extension Antenna
picks up in a 135-degree arc, focused towards the front. Reception in this
arc is enhanced.
4. Rear RF rejection required. Because Sabine's Extension Antenna is less
sensitive to signals received from the rear, it can be positioned to reject any
such directional RF interference.
5. Extended operational range. Given a potential maximum cable length of
almost 90 meters from Extension Antenna to receiver, Sabine's SWASS-
EXT allows more options for extending the distance between transmitter
and receiver. (The typical range of Sabine Wireless without the Extension
Antenna is already 100 meters in typical circumstances). Consider that RF
signal strength through the air is diminished by the square of the distance
(twice as far away = ¼ the signal strength), while signal loss through cable
is (roughly) inversely proportional (twice as far away = ½ the signal). That
means you can use an extension antenna to replace transmission-through-air
with transmission-through-cable, to help minimize signal loss.
6. Placing extension antennas. The assymetrical pattern of each antenna
helps reduce the chance for a null spot in your room. You may use either
antenna on the left or right side of your performance space. When you mount
the extension antennas on a stand or on a wall, make sure the short end of
the triangle is up.
7. In order for the system to be effective, both extension antennas should be
in a good pickup position at all times but separated by about ten or fifteen
feet if the antennas are within 100 or so feet.
8. If you put the antennas too far apart, i.e., at opposite ends of the room, or
in separate rooms, to improve coverage, diversity is defeated and you will
get dropouts. In other words, diversity is more important that coverage. If
you mount the extension antennas in the ceiling, the antennas metallic
backplane must be orientated parallel to the floor and the antennas must not
be blocked by pillars, lights or similar obstructions. Aim the hole in the plastic
cover toward the podium.
9. Do not daisy-chain extension antennas together in series. Receivers and
the antenna distribution amp are only designed to use one left and one right
antenna.
10. Extension Antenna Cables: Use coax cable to connect the extension
antennas to the receiver or to the ADA. See the chart on the previous page
for cable specifications. Use the SWATNC-N step-down cable to connect
thicker RG8 cables to the extension antenna.
11. The SWASS-EXT extension antennas add from 22 to 44 dB signal strength
to overcome cable loss. Bad crimp connections are a common cause of
dropouts. Check them carefully!
!
Active Electronics Antenna
Sabine wireless receivers provide
antennas with active electronics. The
inputs to the receiver & antenna dis-
tributor amplifier have phantom power
available for this purpose.
The red LED on the inside of the an-
tenna cover indicates phantom power
(3V) is good.
DO NOT SHORT TO GROUND
The SWASS-EXT features:
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•
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39
Extension Antennas
IMPoRTAnT
Wall or mic-stand mount
Straight and right angle TNC
connectors
135 degree reception pat-
tern
Adjustable from +22 to +44
dB boost in RF
Wood-tone finish
Phantom-powered from the
receiver or the distribution
amp
Sabine Smart Spectrum Wireless
®
LIT-SWM6-7000-OG-EN-110203.indd
!