Impact Of Extraneous Light; Radiating Power; Radiating Power During Multi-Channel Operation; Computing The Radiating Power - Sennheiser SZI 1029 series Bedienungsanleitung

IMPACT OF EXTRANEOUS LIGHT Daylight and artificial light in a room also have an impact on the IR
reception. Since the spectrum of this light also contains infra-red portions
it can interfere with the useful signal radiated by the SZI 1029. At worst,
the reception is disturbed by hissing noise.
Extraneous light
Fremdlicht
IR light IR-Licht
Fremdlicht
Extraneous light
IR light
IR-Licht

RADIATING POWER

RADIATING POWER DURING (Not for SZI 1029-T models) The number of transmitted channels has
MULTI-CHANNEL OPERATION an impact on the radiated power of the infra-red radiator SZI 1029.
The power is uniformly divided in such a way that, for instance, in a
system with 12 narrow-band channels only 1/12 of the desired radiating
power is available for each audio channel.
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COMPUTING THE
RADIATING POWER
RULE OF THUMB
PROPAGATION OF
INFRA-RED LIGHT
Number of channels
Example: 12
During single channel operation (switch set to
SZI 1029 radiator will supply an area of about 1000 sq.m.
The SZI 1029-10 radiators are able to supply approximately double
this area.
When switched to narrow-band multi-channel operation (switch set to
) power output and thus irradiated area are reduced by
MULTI
approximately 35 % (see RADIATING POWER DURING MULTICHANNEL
OPERATION ).
A simple formula facilitates the calculation of the number of radiators
necessary to irradiate a given room:
Grundfläche in m
surface area in sq. m. x number of channels
Number of radiators (SZI 1029) =
surface area in sq. m. x number of channels
Number of radiators (SZI 1029-10) =
The high power radiator SZI 1029 radiates the infra-red light in a lobar
shape. With increasing distance the intensity becomes weaker. When a
receiver leaves the irradiated area the transmission is interrupted. Recei
vers without squelch will produce a hissing noise, receivers with squelch
will mute.
10˚
150m
140m
20˚
130m
120m
110m
100m
90m
30˚
80m
40dB
70m
60m
40˚
50m
50˚
40m
30m
60˚
20m
70˚
10m
80˚
90˚
), every
MONO
2 x Anzahl der Kanäle
650
1300
10˚
20˚
26dB
30˚
40˚
50˚
60˚
70˚
80˚
90˚
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