Sennheiser SI 30 General Description

SI 30/SZI 30
IR Audio Transmission Technology |
General Description
The SI 30 is a wideband modulator with an integral radiator. It can be switched
be tween operation on channel 1 (2.3 MHz), channel 2 (2.8 MHz) and stereo operation.
Due to its compact size and relatively low radiating power, the SI 30 modulator/
radiator and the SZI 30 radiator are an ideal choice for smaller or medium-sized
rooms, for covering recesses or for applications which require transmission of audio
information to well defined zones, e.g. in museums.
Features
Compact radiator and modulator/radiator for the carrier
frequencies 2.3 MHz and 2.8 MHz
Easy installation and precise alignment
Delivery includes:
SI 30: 1 x SI 30 modulator/radiator, 1 x AF connection cable, 3.5 mm stereo jack
plug to Texas connector, length 2 m, 1 x 3.5 mm/1/4" stereo jack adaptor
SZI 30: 1 x SZI 30 radiator
The NT 20-1 plug-in mains unit is not included in the delivery. Please order
it separately in the version you require (European, UK or USA versions available).
Modulators/Radiators
Technical Data SI 30
Modulation ....................................................... wideband FM
Nominal deviation .................................................. ± 50 kHz
Carrier frequencies ..................................2.3 MHz, 2.8 MHz
AF input................................................... 3-pin Texas socket
AF input voltage for
nominal deviation..............................................45 mV – 4 V
AF frequency response...............................30 – 18,000 Hz
THD (1 kHz, nom. dev.) .................................................≤ 1 %
AF signal-to-noise ratio.................................. ≥ 60 dB(A)
RF output.................................................. 3.5 mm mono jack
Output impedance............................................approx. 50 Ω
IR diodes ................................................................................11
Max. coverage area .................. approx. 80 m
Radiating power ............................................. approx. 0.5 W
Operating voltage............................ 24 – 27 V DC via 2-pin
Current consumption ................................. approx. 180 mA
Dimensions ................................approx. 118 x 25 x 90 mm
Weight .............................................................. approx. 140 g
Technical Data SZI 30
Nominal deviation .................................................. ± 50 kHz
Carrier frequencies ............................................ max. 6 MHz
AF frequency response................ depends on modulator
THD (1 kHz, nom. dev.) .................................................≤ 1 %
AF signal-to-noise ratio ................................ ≥ 60 dB(A)
RF input .................................................... 3.5 mm mono jack
RF output......................................3.5 mm mono jack with a
Output impedance.........................approx. 20 kΩ or 50 Ω*
IR diodes ................................................................................11
Max. coverage area .................. approx. 80 m
Radiating power ............................................. approx. 0.5 W
Operating voltage............................ 24 – 27 V DC via 2-pin
Current consumption ................................. approx. 150 mA
Dimensions ................................approx. 118 x 25 x 90 mm
Weight .............................................................. approx. 135 g
*see description on the following pages
(automatic modulation control)
2
, single-chn.
Texas socket
50-Ω term. impedance
2
, single-chn.
Texas socket
rms
rms