Sennheiser EW100 G2 - Manual (Page 40)

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Wireless transmission systems
With the ew 100 G2 series, Sennheiser puts an end to cable tangles and enab-
les complete freedom of movement. The systems operate exclusively in the
UHF band. UHF transmission is extremely reliable and is far less prone to
interference than the overcrowded VHF band – harmonics from mains units,
fluorescent tubes, refrigerators, computers, etc. are virtually eliminated. Also
indoor propagation of UHF radio waves is better than VHF so that the RF
power can be kept low – this is also an advantage when using multi-channel
systems. Finally, UHF frequency ranges are being approved all over the world
for radiomicrophone usage – in some countries licence-free.
There are three transmitter versions: The hand-held transmitter is a complete
radiomicrophone in a single unit, the plug-on transmitter converts your
favourite wired microphone into a radiomicrophone, the bodypack transmit-
ter can accept a wide range of inputs including: omni-directional or cardioid
clip-on microphones, head-worn microphone, guitar/instrument direct input
and auxiliary units via the optional CL 2 line input cable.
Correct adjustment of transmitter sensitivity is vital. Too high and you get
overmodulation and distortion, too low and you get undermodulation and a
noisy signal. Please set the sensitivity correctly for the microphone/usage
and check it before every performance to ensure best operation.
Sennheiser miniature clip-on microphones can be attached in various ways:
they can, for example, be attached to the hairline or to clothing (e.g. tie or
lapel). However it is fixed, please make sure that the microphone is protected
against sweat/moisture and make-up.
Squelch
Pilot tone squelch
The transmitter adds a pilot tone to the audio signal. The receiver checks
incoming audio signals to see if the pilot tone is present. In the absence of the
signal, the receiver’s audio output will remain muted, even if a strong RF sig-
nal is present.
This prevents strong interfering signals from causing hissing noise in the
receiver when the transmitter is switched off.
In order to benefit from this feature, the pilot tone function must be activated
on both the transmitter and the receiver. The pilot tone function is factory-
preset to “ON” (= activated).
Field strength-dependent squelch
Depending on the strength of the received RF signal, the receiver’s audio out-
put is opened or muted. Via the “
SQELCH ” menu of the receiver, the squelch
threshold can be adjusted in three steps (LO, MID, HI).