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Receiver Operation
EDIT
Channel Select/Contrast
button (selects receiver
channel to edit)
Fig. 5i
Fig. 5j
Fig. 5k
Sabine 2.4 GHz Smart Spectrum
5.5.2. Controlling the Receiver in Channel Mixing Mode
All functions are individually controllable for each channel when in Channel
Mix mode, except the output level, which is shared. Normally the active
channel for control is displayed in three ways: the blue button for that chan-
nel lights up, the LCD gets brighter, and the word EDIT is shown. Use the
Channel Select buttons to choose the channel you wish to control.
In Channel Mix mode you still use the Channel Select buttons to choose the
channel to control, but you will only see one of these three indicators. The
EDIT
word EDIT will be shown in the LCD of the channel selected for control. Look
carefully – this is your only indication of which channel you are controlling
5.6. Guitar Cord Simulator
This feature allows you to fine tune the sound of your instrument while it is patched
into your Sabine wireless beltpack. The wireless sounds of guitars or basses can
be very different from the direct (patched with a cord) sounds. Your Sabine 2.4
GHz wireless solves this problem by using a unique broadcast scheme that gives
full 20 to 20KHz frequency response. This results in a much fuller sounding
instrument (the bass response is finally there on a wireless!), and sometimes a
brighter sound, too.
How can this be? Your guitar cable can actually reduce your high frequency re-
sponse. We are all quite used to this slight rolling off of the high end, but the Sabine
wireless does not roll off, so your instrument may sound brighter then ever before.
Here's where the Cord Simulator can help. Turn on your beltpack transmitter and
put it in GUI mode. To select GUI mode, open the beltpack, push the select button
a few times until you see the MIC or GUI display. Use the up/down button to
choose GUI. (See the Beltpack Quick Guide for detailed instructions). The De-
Esser knob on your receiver becomes your Cord Simulator knob. Turn the knob
counter-clockwise until your instrument sounds like it does when patched direct.
The Cord Simulator replaces the De-Esser function only when a beltpack trans-
mitter is turned on and set to GUI mode.
5.7 . Receiver Antenna Placement
One of the biggest potential problems in any wireless system is RF interference. Under-
standing wave interference patterns will help you to place and orient your receivers and
antennas properly, and thereby reduce the likelihood of RF interference.
Your SWM7000 series receiver ships with two standard coaxial bipole antennas.
Each antenna picks up in a donut-shaped (toroidal) pattern, more or less equally
in all directions, with null points directly above and below.
5.7 .1. Multi-path Interference
Like sound waves, radio waves are subject to wave interference patterns pro-
duced by reflected or delayed waves combining with direct, unreflected waves,
converging upon a receiving antenna simultaneously. In the RF world this
phenomenon is called multi-path interference. As with audio comb filtering,
radio waves can combine additively or subtractively. Thus, mounting an an-
tenna close to a reflective surface can result in poor reception. For example, if
weaker than expected reception occurs, and the receptive part of the antenna
(the top 3 cm) is close to a reflective surface (wall, large metal objects, etc.), you
might improve reception simply by repositioning, or re-aiming, the antennas.
In some situations — for example, those with difficult lines-of-sight, or when
transmitters and receivers are separated by a wall, or when receiver placement
options are limited — an extension antenna may be necessary to guarantee
reliable reception. Please refer to Section 12 for information about the advan-
tages and use of Sabine's SWASS-EXT Extension Antenna Kit.
5.7 .2. Receiver & Antenna Placement Tips
1.
When possible, maintain line of sight from transmitter to receiver. Con-
sider the potential range of transmitter "roaming," and locate your receiver
accordingly. If direct line of sight proves impossible or difficult, consider
using Sabine's low-profile, active Extension Antenna Kit (SWASS-EXT),
which boosts the signal strength, extends the maximum distance from
®
Wireless
(Beltpack Transmitter Only)
22
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