Sennheiser SP230 User Manual

SP230 Operating Instructions

The SP230 is a portable, two channel infrared system with the ability to change modes of operation from single channel transmission to two channel operation or stereo with the flip of a switch. Two step installation merely requires the connection of a microphone, CD player, or similar audio source and 110 VAC. Once turned on, the SP230 is ready to transmit.

This system is designed to be used on table tops or any flat surface. A carrying handle has been provided for easy portability from room to room. For better coverage in large halls, the SP230 can be mounted on a heavy duty microphone or speaker stand and be raised as high as necessary. A threaded 3/8” insert for this is located on the base of the unit.

The SP230 can accept both balanced microphone inputs and -10dB high impedance line inputs. The microphone input passes directly to the microphone preamp. The line input features a variable line input level control and is transformer isolated for protection against improperly grounded systems. Both the microphone and line inputs may be used separately or together with balancing of levels using the input level control located at the top of the rear panel.

Specifications
Sub-carrier frequencies	2.3 and 2.8 MHz (switchable or stereo)
Inputs	Two XLR balanced mic level
	Two ¼” line level
Output	Two ¼” line level
Power requirements	110 VAC
Dimensions	10” W x 7” D x 8.5” H
Weight	9 lbs., 8 oz.
Compatible Infrared Receivers
Mono Receivers	RI250, RI150
Stereo Receivers	HDI302, RI810S, HDI830, RI830S
Optional Accessories
Soft Carrying Case	SC110
Charger / carry case	HC230
Chargers (receiver dependent)	L151-10/NT, L300-10

	MASTER SWITCH
LEVEL	BNC CONNECTORS
CONTROLS

110VAC

POWER LED

BARRIER CONNECTIONS

MODULATOR LED

Installation

Using the 110VAC power cord, plug the unit into a standard 110VAC power outlet. Plug the cable into the socket on the SP230 (see line drawing). Switch the “Power” selector to the “On” position (see line drawing).

Audio Connection

Plug in the audio input(s) to “Line In Channel 1 and/or 2” via 3 pin XLR for mic level input or ¼” plug for line level (see above line drawing).

Using the “CH selector” (see line drawing), select Channel 1 (for single channel audio at 2.3 MHz); Channel 2 (for single channel audio at 2.8 MHz); or, Stereo (for 2.3 and 2.8 MHz) operation.

To feed recording equipment or house PA system, use the “Line Out” connections (see line drawing) via ¼” plug(s).

Audio Adjustments

The SP230 comes equipped with internal Automatic Gain Control (AGC) circuitry which automatically adjusts the audio levels, therefore, set the line level controls (see line drawing) to the maximum (clockwise) position.

When using a combination of mic level and line level inputs, mixing the audio input signals can be accomplished using the “Line Level 1 and/or 2” control knobs to achieve the desired output.

Master / Slave Options

The SP230 can be used as a Master unit, when used alone; or, as a Slave emitter when used with a separate modulator (e.g., SI1015 rack mount modulator). Please note: only the modulator accepts the original audio program directly. When using the SP230 as a master unit, position “Master” switch (see line drawing) in the Master position.