User's Manual

34
Sabine 2.4 GHz Smart Spectrum Wireless (BETA)
Multiple Systems Operation
3. Third, large installations often entail long distances from transmit-
ters to receivers, or the presence of obstacles (walls, for example)
in the transmission path that can interfere with clear reception.
While the SWM7000 series is designed to minimize these kinds of
problems without accessories, the SWASS-EXT (set of two exten-
sion antennas, shown in figure 12b on next page) may prove helpful
or even necessary in some situations. In addition to providing re-
mote and/or desirable low profile positioning with improved recep-
tion, the SWASS-EXT also adds another 18 dB of antenna gain for
even more reliable system performance. The Extension Antenna
and Distribution Amplifier components are also designed to oper-
ate in tandem, with the Extension Antenna plugged directly into
the amp, which can then feed (via cable) the antenna inputs of 6
receivers. A combination of 2-channel receivers (SW72-R or SW72-
NDR), a set (2 pieces) of SWASS-EXT, and one SWA6SS, would
reduce the antenna clutter of 12 transmission channels to a single
pair of extension antennas. (See section 12 for more information
about setup and use of the SWASS-EXT).
4. Fourth, software control for the ND series receivers allows up to 70
receiver channels to be controlled from a single computer. This
quick and powerful control methodology means you can monitor
and change transmission channels, mic modeling, compression
and de-essing — in short, all front panel controls — from a remote
laptop or desktop. In addition to simplifying multiple unit operation
with remote front panel controls, the remote software provides ad-
ditional features and functions not available from front panel con-
trol. (See Section 13 for more information about setup and use of
the Remote Software).
11.1.2.1. SWA6SS Antenna Distribution Amplifier
Sabine’s optional accessory SWA6SS Antenna Distribution Amplifier
is ideal for simplifying antenna set up when multiple receivers are used,
by using a single pair of antennas to replace pairs for up to 6 different
receivers. Standard equipment packed with each Antenna Distributor
includes an AC power cable, and 6 pairs of 1-meter long jumper cables
(RG-58 AU foam core) for connecting the Antenna Distributor to receiv-
ers (2 cables provide true diversity reception to each receiver).
For best results, the Antenna Distribution Amplifier should be positioned
close enough to the receivers to minimize cable runs. In most applica-
tions, you can use the standard Sabine 2.4 GHz antennas supplied
with any of the receivers to connect to the terminals on the Antenna
Distributor, and then connect (in matching pairs) the jumpers to all your
receiver antenna connections (up to 6 receivers, 1 pair per receiver).
Care should be exercised when using longer cables, due to possible
transmission signal loss (approximately 1.7 dB/meter). Using the “rule-
of-thumb” that a signal loss no greater than 6 dB will prove acceptable
in many circumstances, you may be able to use RG-58 cable up to 3
meters or so in length. However, a better strategy than moving the
Fig. 12a SWA6SS Antanna Distributor