Sennheiser SI 30 Instruction Manual PDF

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Summary of Content for Sennheiser SI 30 Instruction Manual PDF

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SI 30 INSTRUCTIONS FOR USE

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BRIEF DESCRIPTION Infra-red two-channel modulator used in conjunction with Senn- heiser infra-red receivers to set up a cordless sound transmission system.

SI 30 infra-red two-channel modulators have sufficient IR capa- city to cover rooms of up to 80 m2 (mono) or 40 m2 (stereo).

SI 30 infra-red two-channel modulators are an integral part of Sennheisers modular design concepts which allow added flexi- bility in the setting up of cordless sound transmission systems.

A list of available accessories comes with the SI 30.

FEATURES Automatic on/off function Operation indicator (green LED) Mode selection switch for selection of carrier frequencies Automatic volume control RF output for connection of infra-red radiators

SUITABLE INFRA-RED RECEIVERS FROM SENNHEISER

RI 150, RI 250, RI 250-J, RI 300, RI 500, RI 250-S, HDI 302, HDI 380

11 infra-red diodesOperation indicator, green LED

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INSTALLATION Position the modulator as high as possible (eye-level). Make sure

that the diodes point at the receivers.

Do not cover the diodes! Do not obstruct the path of the light between the modulator and the receiver.

MAINS CONNECTION Connect the NT 20 plug-in mains unit to the mains. Plug the cable into power supply socket (S) on the SI 30. Pay attention to the cor- rect direction of the plug.

AF CONNECTION Use the AF connection cable to connect the AF input (N) on the SI 30 to the headphone socket of the sound source.

Please contact your nearest dealer if your sound source has no 3.5 mm or 6.3 mm socket.

RF OUTPUT FOR CONNECTION OF INFRA-RED RADIATORS Connect SZI 1029, SZI 1015 or SZI 30 infra-red radiators to provide sufficient IR capacity for larger rooms. The SZI 1029, SZI 1015 and SZI 30 connect to the 3.5 mm mono jack socket (Z) on the SI 30 modulator (please see list of available accessories).

Power supply socket (S)

Mode selection switch (B) Channel 1, 2, Stereo

RF output (Z) for connection of infra-red radiators

AF input (N)

R L L L

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ADJUSTMENTS ON YOUR SOUND SOURCE Set the volume of your sound source to a medium value. NOTE Some modern television sets have a separate volume con-

trol the headphone socket. Please refer to the instruction manual of your television set.

Although the socket for the connection of a tape recorder (e.g. on the amplifier of a PA system) cannot be regulated, it usually delivers a signal voltage which is sufficient to operate the SI 30 modulator.

MODE SELECTION SWITCH CHANNEL 1, 2, STEREO/SELECTION OF THE CARRIER FREQUENCY The mode selection switch (B) at the rear of the SI 30 serves to select the infra-red carrier frequency. Please note that in mono mode only the tip of the strereo jack plug is used (see diagram):

Stereo or two-channel mode

Mono Channel 1 (2.3 MHz)

Mono Channel 2 (2.8 MHz)

Connection to mono sockets

Connection to mono sockets

Connection to stereo sockets

During mono operation the SI 30s IR capacity is twice as high as during stereo operation!

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ON/OFF SWITCH The SI 30 modulator and the NT 20 plug-in mains unit have no ON/OFF switch. The green LED at the front of the SI 30 indicates that the modulator is ready for operation.

In standby mode, the SI 30s current consumption is very low. Howe- ver, unplug the mains unit when you are not going to use the SI 30 for some time.

AUTOMATIC ON/OFF FUNCTION The SI 30 features a convenient automatic on/off function. When an audio signal reaches the modulator, it is switched on (L 1 lights up). If there is no audio signal for about 3 to 4 minutes, the modulator automatically switches off.

The automatic on/off function depends on a certain threshold voltage. If the signal voltage falls below this threshold, the modu- lator auto-matically switches off after 3 minutes (L 1 goes off). In this case, increase the volume on your sound source (please see paragraph Adjustments on your sound source).

DELIVERY INCLUDES 1 SI 30 modulator 1 AF connection cable with 3.5 mm mono jack plug 1 3.5 mm/1/4 jack adaptor

ACCESSORIES (to be ordered separately)

Please see list of available accessories 1 NT 20 plug-in mains unit (120 V, 230 V or 240 V) for po-

wering the SI 30 or for powering the SI 30 in conjunction with SZI 30 infra-red radiators.

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TECHNICAL DATA

Mode selection switch: I mono channel 1 II mono channel 2 stereo channel 1+2

Modulation FM Carrier frequencies channel 1: 2.3 MHz channel 2: 2.8 MHz Nominal deviation 50 kHz Emitting diodes 11 Pre-emphasis 50 s Audio frequency response 30 - 18,000 Hz THD (1 kHz and nominal deviation) 1 % Signal-to-noise ratio 74 dBArms 63 dB as per CCIR 468

Volume control automatic

AF connection 3.5 mm jack plug with adaptor to 1/4(6.3 mm)

RF output for connection of infra-red radiators 3.5 mm mono jack socket

Input voltage for nominal deviation 45 mV- 4 V

Automatic on/off function yes

Input voltage for automatic on/off function > 45 mV

Operation indicator green LED

Operating voltage 24 - 27 V DC

Current consumption 180 mA

Power consumption (standby) approx. 3.5 VA

Dimensions approx. 118 x 25 x 90 mm Weight approx. 140 g

Subject to alter

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